1 /* Definitions of target machine for Mitsubishi D30V.
2 Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Solutions.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 /* D30V specific macros */
26 /* Align an address */
27 #define D30V_ALIGN(addr,align) (((addr) + (align) - 1) & ~((align) - 1))
30 /* Set up System V.4 (aka ELF) defaults. */
34 /* Driver configuration */
36 /* A C expression which determines whether the option `-CHAR' takes arguments.
37 The value should be the number of arguments that option takes-zero, for many
40 By default, this macro is defined to handle the standard options properly.
41 You need not define it unless you wish to add additional options which take
45 /* #define SWITCH_TAKES_ARG(CHAR) */
47 /* A C expression which determines whether the option `-NAME' takes arguments.
48 The value should be the number of arguments that option takes-zero, for many
49 options. This macro rather than `SWITCH_TAKES_ARG' is used for
50 multi-character option names.
52 By default, this macro is defined as `DEFAULT_WORD_SWITCH_TAKES_ARG', which
53 handles the standard options properly. You need not define
54 `WORD_SWITCH_TAKES_ARG' unless you wish to add additional options which take
55 arguments. Any redefinition should call `DEFAULT_WORD_SWITCH_TAKES_ARG' and
56 then check for additional options.
59 /* #define WORD_SWITCH_TAKES_ARG(NAME) */
61 /* A string-valued C expression which is nonempty if the linker needs a space
62 between the `-L' or `-o' option and its argument.
64 If this macro is not defined, the default value is 0. */
65 /* #define SWITCHES_NEED_SPACES "" */
67 /* A C string constant that tells the GNU CC driver program options to pass to
68 CPP. It can also specify how to translate options you give to GNU CC into
69 options for GNU CC to pass to the CPP.
71 Do not define this macro if it does not need to do anything. */
72 /* #define CPP_SPEC "" */
74 /* If this macro is defined, the preprocessor will not define the builtin macro
75 `__SIZE_TYPE__'. The macro `__SIZE_TYPE__' must then be defined by
78 This should be defined if `SIZE_TYPE' depends on target dependent flags
79 which are not accessible to the preprocessor. Otherwise, it should not be
81 /* #define NO_BUILTIN_SIZE_TYPE */
83 /* If this macro is defined, the preprocessor will not define the builtin macro
84 `__PTRDIFF_TYPE__'. The macro `__PTRDIFF_TYPE__' must then be defined by
87 This should be defined if `PTRDIFF_TYPE' depends on target dependent flags
88 which are not accessible to the preprocessor. Otherwise, it should not be
90 /* #define NO_BUILTIN_PTRDIFF_TYPE */
92 /* A C string constant that tells the GNU CC driver program options to pass to
93 CPP. By default, this macro is defined to pass the option
94 `-D__CHAR_UNSIGNED__' to CPP if `char' will be treated as `unsigned char' by
97 Do not define this macro unless you need to override the default definition. */
98 /* #if DEFAULT_SIGNED_CHAR
99 #define SIGNED_CHAR_SPEC "%{funsigned-char:-D__CHAR_UNSIGNED__}"
101 #define SIGNED_CHAR_SPEC "%{!fsigned-char:-D__CHAR_UNSIGNED__}"
104 /* A C string constant that tells the GNU CC driver program options to pass to
105 `cc1'. It can also specify how to translate options you give to GNU CC into
106 options for GNU CC to pass to the `cc1'.
108 Do not define this macro if it does not need to do anything. */
109 /* #define CC1_SPEC "" */
111 /* A C string constant that tells the GNU CC driver program options to pass to
112 `cc1plus'. It can also specify how to translate options you give to GNU CC
113 into options for GNU CC to pass to the `cc1plus'.
115 Do not define this macro if it does not need to do anything. */
116 /* #define CC1PLUS_SPEC "" */
118 /* A C string constant that tells the GNU CC driver program options to pass to
119 the assembler. It can also specify how to translate options you give to GNU
120 CC into options for GNU CC to pass to the assembler. See the file `sun3.h'
121 for an example of this.
123 Do not define this macro if it does not need to do anything.
125 Defined in svr4.h. */
128 %{!mno-asm-optimize: %{O*: %{!O0: -O} %{O0: %{masm-optimize: -O}}}} \
129 %{v} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
131 /* A C string constant that tells the GNU CC driver program how to run any
132 programs which cleanup after the normal assembler. Normally, this is not
133 needed. See the file `mips.h' for an example of this.
135 Do not define this macro if it does not need to do anything.
137 Defined in svr4.h. */
138 /* #define ASM_FINAL_SPEC "" */
140 /* A C string constant that tells the GNU CC driver program options to pass to
141 the linker. It can also specify how to translate options you give to GNU CC
142 into options for GNU CC to pass to the linker.
144 Do not define this macro if it does not need to do anything.
146 Defined in svr4.h. */
151 %{static:-dn -Bstatic} \
152 %{shared:-G -dy -z text} \
153 %{symbolic:-Bsymbolic -G -dy -z text} \
157 %{mextmem: -m d30v_e} %{mextmemory: -m d30v_e} %{monchip: -m d30v_o}"
159 /* Another C string constant used much like `LINK_SPEC'. The difference
160 between the two is that `LIB_SPEC' is used at the end of the command given
163 If this macro is not defined, a default is provided that loads the standard
164 C library from the usual place. See `gcc.c'.
166 Defined in svr4.h. */
168 #define LIB_SPEC "--start-group -lsim -lc --end-group"
170 /* Another C string constant that tells the GNU CC driver program how and when
171 to place a reference to `libgcc.a' into the linker command line. This
172 constant is placed both before and after the value of `LIB_SPEC'.
174 If this macro is not defined, the GNU CC driver provides a default that
175 passes the string `-lgcc' to the linker unless the `-shared' option is
177 /* #define LIBGCC_SPEC "" */
179 /* Another C string constant used much like `LINK_SPEC'. The difference
180 between the two is that `STARTFILE_SPEC' is used at the very beginning of
181 the command given to the linker.
183 If this macro is not defined, a default is provided that loads the standard
184 C startup file from the usual place. See `gcc.c'.
186 Defined in svr4.h. */
188 #undef STARTFILE_SPEC
189 #define STARTFILE_SPEC "crt0%O%s crtbegin%O%s"
191 /* Another C string constant used much like `LINK_SPEC'. The difference
192 between the two is that `ENDFILE_SPEC' is used at the very end of the
193 command given to the linker.
195 Do not define this macro if it does not need to do anything.
197 Defined in svr4.h. */
200 #define ENDFILE_SPEC "crtend%O%s"
202 /* Define this macro if the driver program should find the library `libgcc.a'
203 itself and should not pass `-L' options to the linker. If you do not define
204 this macro, the driver program will pass the argument `-lgcc' to tell the
205 linker to do the search and will pass `-L' options to it. */
206 /* #define LINK_LIBGCC_SPECIAL */
208 /* Define this macro if the driver program should find the library `libgcc.a'.
209 If you do not define this macro, the driver program will pass the argument
210 `-lgcc' to tell the linker to do the search. This macro is similar to
211 `LINK_LIBGCC_SPECIAL', except that it does not affect `-L' options. */
212 /* #define LINK_LIBGCC_SPECIAL_1 */
214 /* Define this macro to provide additional specifications to put in the `specs'
215 file that can be used in various specifications like `CC1_SPEC'.
217 The definition should be an initializer for an array of structures,
218 containing a string constant, that defines the specification name, and a
219 string constant that provides the specification.
221 Do not define this macro if it does not need to do anything. */
222 /* #define EXTRA_SPECS {{}} */
224 /* Define this macro as a C expression for the initializer of an array of
225 string to tell the driver program which options are defaults for this target
226 and thus do not need to be handled specially when using `MULTILIB_OPTIONS'.
228 Do not define this macro if `MULTILIB_OPTIONS' is not defined in the target
229 makefile fragment or if none of the options listed in `MULTILIB_OPTIONS' are
230 set by default. *Note Target Fragment::. */
231 /* #define MULTILIB_DEFAULTS {} */
233 /* Define this macro to tell `gcc' that it should only translate a `-B' prefix
234 into a `-L' linker option if the prefix indicates an absolute file name. */
235 /* #define RELATIVE_PREFIX_NOT_LINKDIR */
237 /* Define this macro as a C string constant if you wish to override the
238 standard choice of `/usr/local/lib/gcc-lib/' as the default prefix to try
239 when searching for the executable files of the compiler. */
240 /* #define STANDARD_EXEC_PREFIX "" */
242 /* If defined, this macro is an additional prefix to try after
243 `STANDARD_EXEC_PREFIX'. `MD_EXEC_PREFIX' is not searched when the `-b'
244 option is used, or the compiler is built as a cross compiler.
246 Defined in svr4.h for host compilers. */
247 /* #define MD_EXEC_PREFIX "" */
249 /* Define this macro as a C string constant if you wish to override the
250 standard choice of `/usr/local/lib/' as the default prefix to try when
251 searching for startup files such as `crt0.o'. */
252 /* #define STANDARD_STARTFILE_PREFIX "" */
254 /* If defined, this macro supplies an additional prefix to try after the
255 standard prefixes. `MD_EXEC_PREFIX' is not searched when the `-b' option is
256 used, or when the compiler is built as a cross compiler.
258 Defined in svr4.h for host compilers. */
259 /* #define MD_STARTFILE_PREFIX "" */
261 /* If defined, this macro supplies yet another prefix to try after the standard
262 prefixes. It is not searched when the `-b' option is used, or when the
263 compiler is built as a cross compiler. */
264 /* #define MD_STARTFILE_PREFIX_1 "" */
266 /* Define this macro as a C string constant if you with to set environment
267 variables for programs called by the driver, such as the assembler and
268 loader. The driver passes the value of this macro to `putenv' to initialize
269 the necessary environment variables. */
270 /* #define INIT_ENVIRONMENT "" */
272 /* Define this macro as a C string constant if you wish to override the
273 standard choice of `/usr/local/include' as the default prefix to try when
274 searching for local header files. `LOCAL_INCLUDE_DIR' comes before
275 `SYSTEM_INCLUDE_DIR' in the search order.
277 Cross compilers do not use this macro and do not search either
278 `/usr/local/include' or its replacement. */
279 /* #define LOCAL_INCLUDE_DIR "" */
281 /* Define this macro as a C string constant if you wish to specify a
282 system-specific directory to search for header files before the standard
283 directory. `SYSTEM_INCLUDE_DIR' comes before `STANDARD_INCLUDE_DIR' in the
286 Cross compilers do not use this macro and do not search the directory
288 /* #define SYSTEM_INCLUDE_DIR "" */
290 /* Define this macro as a C string constant if you wish to override the
291 standard choice of `/usr/include' as the default prefix to try when
292 searching for header files.
294 Cross compilers do not use this macro and do not search either
295 `/usr/include' or its replacement. */
296 /* #define STANDARD_INCLUDE_DIR "" */
298 /* Define this macro if you wish to override the entire default search path for
299 include files. The default search path includes `GCC_INCLUDE_DIR',
300 `LOCAL_INCLUDE_DIR', `SYSTEM_INCLUDE_DIR', `GPLUSPLUS_INCLUDE_DIR', and
301 `STANDARD_INCLUDE_DIR'. In addition, `GPLUSPLUS_INCLUDE_DIR' and
302 `GCC_INCLUDE_DIR' are defined automatically by `Makefile', and specify
303 private search areas for GCC. The directory `GPLUSPLUS_INCLUDE_DIR' is used
304 only for C++ programs.
306 The definition should be an initializer for an array of structures. Each
307 array element should have two elements: the directory name (a string
308 constant) and a flag for C++-only directories. Mark the end of the array
309 with a null element. For example, here is the definition used for VMS:
311 #define INCLUDE_DEFAULTS \
313 { "GNU_GXX_INCLUDE:", 1}, \
314 { "GNU_CC_INCLUDE:", 0}, \
315 { "SYS$SYSROOT:[SYSLIB.]", 0}, \
320 Here is the order of prefixes tried for exec files:
322 1. Any prefixes specified by the user with `-B'.
324 2. The environment variable `GCC_EXEC_PREFIX', if any.
326 3. The directories specified by the environment variable
329 4. The macro `STANDARD_EXEC_PREFIX'.
333 6. The macro `MD_EXEC_PREFIX', if any.
335 Here is the order of prefixes tried for startfiles:
337 1. Any prefixes specified by the user with `-B'.
339 2. The environment variable `GCC_EXEC_PREFIX', if any.
341 3. The directories specified by the environment variable
342 `LIBRARY_PATH' (native only, cross compilers do not use this).
344 4. The macro `STANDARD_EXEC_PREFIX'.
348 6. The macro `MD_EXEC_PREFIX', if any.
350 7. The macro `MD_STARTFILE_PREFIX', if any.
352 8. The macro `STANDARD_STARTFILE_PREFIX'.
357 /* #define INCLUDE_DEFAULTS {{ }} */
360 /* Run-time target specifications */
362 /* Define this to be a string constant containing `-D' options to define the
363 predefined macros that identify this machine and system. These macros will
364 be predefined unless the `-ansi' option is specified.
366 In addition, a parallel set of macros are predefined, whose names are made
367 by appending `__' at the beginning and at the end. These `__' macros are
368 permitted by the ANSI standard, so they are predefined regardless of whether
369 `-ansi' is specified.
371 For example, on the Sun, one can use the following value:
373 "-Dmc68000 -Dsun -Dunix"
375 The result is to define the macros `__mc68000__', `__sun__' and `__unix__'
376 unconditionally, and the macros `mc68000', `sun' and `unix' provided `-ansi'
378 #define CPP_PREDEFINES "-D__D30V__ -Amachine=d30v"
380 /* This declaration should be present. */
381 extern int target_flags
;
383 /* This series of macros is to allow compiler command arguments to enable or
384 disable the use of optional features of the target machine. For example,
385 one machine description serves both the 68000 and the 68020; a command
386 argument tells the compiler whether it should use 68020-only instructions or
387 not. This command argument works by means of a macro `TARGET_68020' that
388 tests a bit in `target_flags'.
390 Define a macro `TARGET_FEATURENAME' for each such option. Its definition
391 should test a bit in `target_flags'; for example:
393 #define TARGET_68020 (target_flags & 1)
395 One place where these macros are used is in the condition-expressions of
396 instruction patterns. Note how `TARGET_68020' appears frequently in the
397 68000 machine description file, `m68k.md'. Another place they are used is
398 in the definitions of the other macros in the `MACHINE.h' file. */
400 #define MASK_NO_COND_MOVE 0x00000001 /* disable conditional moves */
402 #define MASK_DEBUG_ARG 0x10000000 /* debug argument handling */
403 #define MASK_DEBUG_STACK 0x20000000 /* debug stack allocations */
404 #define MASK_DEBUG_ADDR 0x40000000 /* debug GO_IF_LEGITIMATE_ADDRESS */
406 #define TARGET_NO_COND_MOVE (target_flags & MASK_NO_COND_MOVE)
407 #define TARGET_DEBUG_ARG (target_flags & MASK_DEBUG_ARG)
408 #define TARGET_DEBUG_STACK (target_flags & MASK_DEBUG_STACK)
409 #define TARGET_DEBUG_ADDR (target_flags & MASK_DEBUG_ADDR)
411 #define TARGET_COND_MOVE (! TARGET_NO_COND_MOVE)
413 /* Default switches used. */
414 #ifndef TARGET_DEFAULT
415 #define TARGET_DEFAULT 0
418 /* This macro defines names of command options to set and clear bits in
419 `target_flags'. Its definition is an initializer with a subgrouping for
422 Each subgrouping contains a string constant, that defines the option name, a
423 number, which contains the bits to set in `target_flags', and a second
424 string which is the description displayed by `--help'. If the number is
425 negative then the bits specified by the number are cleared instead of being
426 set. If the description string is present but empty, then no help
427 information will be displayed for that option, but it will not count as an
428 undocumented option. The actual option name is made by appending `-m' to
431 One of the subgroupings should have a null string. The number in this
432 grouping is the default value for target_flags. Any target options act
433 starting with that value.
435 Here is an example which defines -m68000 and -m68020 with opposite meanings,
436 and picks the latter as the default:
438 #define TARGET_SWITCHES \
439 { { "68020", TARGET_MASK_68020, "" }, \
440 { "68000", -TARGET_MASK_68020, "Compile for the 68000" }, \
441 { "", TARGET_MASK_68020, "" }} */
443 #define TARGET_SWITCHES \
445 { "cond-move", -MASK_NO_COND_MOVE, \
446 N_("Enable use of conditional move instructions") }, \
448 { "no-cond-move", MASK_NO_COND_MOVE, \
449 N_("Disable use of conditional move instructions") }, \
451 { "debug-arg", MASK_DEBUG_ARG, \
452 N_("Debug argument support in compiler") }, \
454 { "debug-stack", MASK_DEBUG_STACK, \
455 N_("Debug stack support in compiler") }, \
457 { "debug-addr", MASK_DEBUG_ADDR, \
458 N_("Debug memory address support in compiler") }, \
460 { "asm-optimize", 0, \
461 N_("Make adjacent short instructions parallel if possible.") }, \
463 { "no-asm-optimize", 0, \
464 N_("Do not make adjacent short instructions parallel.") }, \
467 N_("Link programs/data to be in external memory by default") }, \
470 N_("Link programs/data to be in external memory by default") }, \
473 N_("Link programs/data to be in onchip memory by default") }, \
475 { "", TARGET_DEFAULT, "" }, \
478 /* This macro is similar to `TARGET_SWITCHES' but defines names of command
479 options that have values. Its definition is an initializer with a
480 subgrouping for each command option.
482 Each subgrouping contains a string constant, that defines the fixed part of
483 the option name, the address of a variable, and a description string. The
484 variable, type `char *', is set to the variable part of the given option if
485 the fixed part matches. The actual option name is made by appending `-m' to
488 Here is an example which defines `-mshort-data-<number>'. If the given
489 option is `-mshort-data-512', the variable `m88k_short_data' will be set to
492 extern char *m88k_short_data;
493 #define TARGET_OPTIONS \
494 { { "short-data-", &m88k_short_data, \
495 "Specify the size of the short data section" } } */
497 #define TARGET_OPTIONS \
499 {"branch-cost=", &d30v_branch_cost_string, \
500 N_("Change the branch costs within the compiler") }, \
502 {"cond-exec=", &d30v_cond_exec_string, \
503 N_("Change the threshold for conversion to conditional execution") }, \
506 /* This macro is a C statement to print on `stderr' a string describing the
507 particular machine description choice. Every machine description should
508 define `TARGET_VERSION'. For example:
511 #define TARGET_VERSION \
512 fprintf (stderr, " (68k, Motorola syntax)");
514 #define TARGET_VERSION \
515 fprintf (stderr, " (68k, MIT syntax)");
517 #define TARGET_VERSION fprintf (stderr, " d30v")
519 /* Sometimes certain combinations of command options do not make sense on a
520 particular target machine. You can define a macro `OVERRIDE_OPTIONS' to
521 take account of this. This macro, if defined, is executed once just after
522 all the command options have been parsed.
524 Don't use this macro to turn on various extra optimizations for `-O'. That
525 is what `OPTIMIZATION_OPTIONS' is for. */
527 #define OVERRIDE_OPTIONS override_options ()
529 /* Some machines may desire to change what optimizations are performed for
530 various optimization levels. This macro, if defined, is executed once just
531 after the optimization level is determined and before the remainder of the
532 command options have been parsed. Values set in this macro are used as the
533 default values for the other command line options.
535 LEVEL is the optimization level specified; 2 if `-O2' is specified, 1 if
536 `-O' is specified, and 0 if neither is specified.
538 SIZE is non-zero if `-Os' is specified, 0 otherwise.
540 You should not use this macro to change options that are not
541 machine-specific. These should uniformly selected by the same optimization
542 level on all supported machines. Use this macro to enable machbine-specific
545 *Do not examine `write_symbols' in this macro!* The debugging options are
546 *not supposed to alter the generated code. */
548 /* #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) */
550 /* Define this macro if debugging can be performed even without a frame
551 pointer. If this macro is defined, GNU CC will turn on the
552 `-fomit-frame-pointer' option whenever `-O' is specified. */
553 #define CAN_DEBUG_WITHOUT_FP
558 /* Define this macro to have the value 1 if the most significant bit in a byte
559 has the lowest number; otherwise define it to have the value zero. This
560 means that bit-field instructions count from the most significant bit. If
561 the machine has no bit-field instructions, then this must still be defined,
562 but it doesn't matter which value it is defined to. This macro need not be
565 This macro does not affect the way structure fields are packed into bytes or
566 words; that is controlled by `BYTES_BIG_ENDIAN'. */
567 #define BITS_BIG_ENDIAN 1
569 /* Define this macro to have the value 1 if the most significant byte in a word
570 has the lowest number. This macro need not be a constant. */
571 #define BYTES_BIG_ENDIAN 1
573 /* Define this macro to have the value 1 if, in a multiword object, the most
574 significant word has the lowest number. This applies to both memory
575 locations and registers; GNU CC fundamentally assumes that the order of
576 words in memory is the same as the order in registers. This macro need not
578 #define WORDS_BIG_ENDIAN 1
580 /* Define this macro if WORDS_BIG_ENDIAN is not constant. This must be a
581 constant value with the same meaning as WORDS_BIG_ENDIAN, which will be used
582 only when compiling libgcc2.c. Typically the value will be set based on
583 preprocessor defines. */
584 /* #define LIBGCC2_WORDS_BIG_ENDIAN */
586 /* Define this macro to have the value 1 if `DFmode', `XFmode' or `TFmode'
587 floating point numbers are stored in memory with the word containing the
588 sign bit at the lowest address; otherwise define it to have the value 0.
589 This macro need not be a constant.
591 You need not define this macro if the ordering is the same as for multi-word
593 /* #define FLOAT_WORDS_BIG_EnNDIAN */
595 /* Define this macro to be the number of bits in an addressable storage unit
596 (byte); normally 8. */
597 #define BITS_PER_UNIT 8
599 /* Number of bits in a word; normally 32. */
600 #define BITS_PER_WORD 32
602 /* Maximum number of bits in a word. If this is undefined, the default is
603 `BITS_PER_WORD'. Otherwise, it is the constant value that is the largest
604 value that `BITS_PER_WORD' can have at run-time. */
605 /* #define MAX_BITS_PER_WORD */
607 /* Number of storage units in a word; normally 4. */
608 #define UNITS_PER_WORD 4
610 /* Minimum number of units in a word. If this is undefined, the default is
611 `UNITS_PER_WORD'. Otherwise, it is the constant value that is the smallest
612 value that `UNITS_PER_WORD' can have at run-time. */
613 /* #define MIN_UNITS_PER_WORD */
615 /* Width of a pointer, in bits. You must specify a value no wider than the
616 width of `Pmode'. If it is not equal to the width of `Pmode', you must
617 define `POINTERS_EXTEND_UNSIGNED'. */
618 #define POINTER_SIZE 32
620 /* A C expression whose value is nonzero if pointers that need to be extended
621 from being `POINTER_SIZE' bits wide to `Pmode' are sign-extended and zero if
622 they are zero-extended.
624 You need not define this macro if the `POINTER_SIZE' is equal to the width
626 /* #define POINTERS_EXTEND_UNSIGNED */
628 /* A macro to update M and UNSIGNEDP when an object whose type is TYPE and
629 which has the specified mode and signedness is to be stored in a register.
630 This macro is only called when TYPE is a scalar type.
632 On most RISC machines, which only have operations that operate on a full
633 register, define this macro to set M to `word_mode' if M is an integer mode
634 narrower than `BITS_PER_WORD'. In most cases, only integer modes should be
635 widened because wider-precision floating-point operations are usually more
636 expensive than their narrower counterparts.
638 For most machines, the macro definition does not change UNSIGNEDP. However,
639 some machines, have instructions that preferentially handle either signed or
640 unsigned quantities of certain modes. For example, on the DEC Alpha, 32-bit
641 loads from memory and 32-bit add instructions sign-extend the result to 64
642 bits. On such machines, set UNSIGNEDP according to which kind of extension
645 Do not define this macro if it would never modify M. */
646 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
648 if (GET_MODE_CLASS (MODE) == MODE_INT \
649 && GET_MODE_SIZE (MODE) < 4) \
653 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
654 be done for outgoing function arguments. */
655 /* #define PROMOTE_FUNCTION_ARGS */
657 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
658 be done for the return value of functions.
660 If this macro is defined, `FUNCTION_VALUE' must perform the same promotions
661 done by `PROMOTE_MODE'. */
662 /* #define PROMOTE_FUNCTION_RETURN */
664 /* Define this macro if the promotion described by `PROMOTE_MODE' should *only*
665 be performed for outgoing function arguments or function return values, as
666 specified by `PROMOTE_FUNCTION_ARGS' and `PROMOTE_FUNCTION_RETURN',
668 /* #define PROMOTE_FOR_CALL_ONLY */
670 /* Normal alignment required for function parameters on the stack, in bits.
671 All stack parameters receive at least this much alignment regardless of data
672 type. On most machines, this is the same as the size of an integer. */
674 #define PARM_BOUNDARY 32
676 /* Define this macro if you wish to preserve a certain alignment for the stack
677 pointer. The definition is a C expression for the desired alignment
680 If `PUSH_ROUNDING' is not defined, the stack will always be aligned to the
681 specified boundary. If `PUSH_ROUNDING' is defined and specifies a less
682 strict alignment than `STACK_BOUNDARY', the stack may be momentarily
683 unaligned while pushing arguments. */
685 #define STACK_BOUNDARY 64
687 /* Alignment required for a function entry point, in bits. */
689 #define FUNCTION_BOUNDARY 64
691 /* Biggest alignment that any data type can require on this machine,
694 #define BIGGEST_ALIGNMENT 64
696 /* Biggest alignment that any structure field can require on this machine, in
697 bits. If defined, this overrides `BIGGEST_ALIGNMENT' for structure fields
699 /* #define BIGGEST_FIELD_ALIGNMENT */
701 /* Biggest alignment supported by the object file format of this machine. Use
702 this macro to limit the alignment which can be specified using the
703 `__attribute__ ((aligned (N)))' construct. If not defined, the default
704 value is `BIGGEST_ALIGNMENT'.
706 Defined in svr4.h. */
707 /* #define MAX_OFILE_ALIGNMENT */
709 /* If defined, a C expression to compute the alignment for a static variable.
710 TYPE is the data type, and BASIC-ALIGN is the alignment that the object
711 would ordinarily have. The value of this macro is used instead of that
712 alignment to align the object.
714 If this macro is not defined, then BASIC-ALIGN is used.
716 One use of this macro is to increase alignment of medium-size data to make
717 it all fit in fewer cache lines. Another is to cause character arrays to be
718 word-aligned so that `strcpy' calls that copy constants to character arrays
719 can be done inline. */
721 #define DATA_ALIGNMENT(TYPE, ALIGN) \
722 (TREE_CODE (TYPE) == ARRAY_TYPE \
723 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
724 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
726 /* If defined, a C expression to compute the alignment given to a constant that
727 is being placed in memory. CONSTANT is the constant and BASIC-ALIGN is the
728 alignment that the object would ordinarily have. The value of this macro is
729 used instead of that alignment to align the object.
731 If this macro is not defined, then BASIC-ALIGN is used.
733 The typical use of this macro is to increase alignment for string constants
734 to be word aligned so that `strcpy' calls that copy constants can be done
737 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
738 (TREE_CODE (EXP) == STRING_CST \
739 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
741 /* Alignment in bits to be given to a structure bit field that follows an empty
742 field such as `int : 0;'.
744 Note that `PCC_BITFIELD_TYPE_MATTERS' also affects the alignment that
745 results from an empty field. */
746 /* #define EMPTY_FIELD_BOUNDARY */
748 /* Number of bits which any structure or union's size must be a multiple of.
749 Each structure or union's size is rounded up to a multiple of this.
751 If you do not define this macro, the default is the same as `BITS_PER_UNIT'. */
752 /* #define STRUCTURE_SIZE_BOUNDARY */
754 /* Define this macro to be the value 1 if instructions will fail to work if
755 given data not on the nominal alignment. If instructions will merely go
756 slower in that case, define this macro as 0. */
758 #define STRICT_ALIGNMENT 1
760 /* Define this if you wish to imitate the way many other C compilers handle
761 alignment of bitfields and the structures that contain them.
763 The behavior is that the type written for a bitfield (`int', `short', or
764 other integer type) imposes an alignment for the entire structure, as if the
765 structure really did contain an ordinary field of that type. In addition,
766 the bitfield is placed within the structure so that it would fit within such
767 a field, not crossing a boundary for it.
769 Thus, on most machines, a bitfield whose type is written as `int' would not
770 cross a four-byte boundary, and would force four-byte alignment for the
771 whole structure. (The alignment used may not be four bytes; it is
772 controlled by the other alignment parameters.)
774 If the macro is defined, its definition should be a C expression; a nonzero
775 value for the expression enables this behavior.
777 Note that if this macro is not defined, or its value is zero, some bitfields
778 may cross more than one alignment boundary. The compiler can support such
779 references if there are `insv', `extv', and `extzv' insns that can directly
782 The other known way of making bitfields work is to define
783 `STRUCTURE_SIZE_BOUNDARY' as large as `BIGGEST_ALIGNMENT'. Then every
784 structure can be accessed with fullwords.
786 Unless the machine has bitfield instructions or you define
787 `STRUCTURE_SIZE_BOUNDARY' that way, you must define
788 `PCC_BITFIELD_TYPE_MATTERS' to have a nonzero value.
790 If your aim is to make GNU CC use the same conventions for laying out
791 bitfields as are used by another compiler, here is how to investigate what
792 the other compiler does. Compile and run this program:
810 printf ("Size of foo1 is %d\n",
811 sizeof (struct foo1));
812 printf ("Size of foo2 is %d\n",
813 sizeof (struct foo2));
817 If this prints 2 and 5, then the compiler's behavior is what you would get
818 from `PCC_BITFIELD_TYPE_MATTERS'.
820 Defined in svr4.h. */
822 #define PCC_BITFIELD_TYPE_MATTERS 1
824 /* Like PCC_BITFIELD_TYPE_MATTERS except that its effect is limited to aligning
825 a bitfield within the structure. */
826 /* #define BITFIELD_NBYTES_LIMITED */
828 /* Define this macro as an expression for the overall size of a structure
829 (given by STRUCT as a tree node) when the size computed from the fields is
830 SIZE and the alignment is ALIGN.
832 The default is to round SIZE up to a multiple of ALIGN. */
833 /* #define ROUND_TYPE_SIZE(STRUCT, SIZE, ALIGN) */
835 /* Define this macro as an expression for the alignment of a structure (given
836 by STRUCT as a tree node) if the alignment computed in the usual way is
837 COMPUTED and the alignment explicitly specified was SPECIFIED.
839 The default is to use SPECIFIED if it is larger; otherwise, use the smaller
840 of COMPUTED and `BIGGEST_ALIGNMENT' */
841 /* #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) */
843 /* An integer expression for the size in bits of the largest integer machine
844 mode that should actually be used. All integer machine modes of this size
845 or smaller can be used for structures and unions with the appropriate sizes.
846 If this macro is undefined, `GET_MODE_BITSIZE (DImode)' is assumed. */
847 /* #define MAX_FIXED_MODE_SIZE */
849 /* A C statement to validate the value VALUE (of type `double') for mode MODE.
850 This means that you check whether VALUE fits within the possible range of
851 values for mode MODE on this target machine. The mode MODE is always a mode
852 of class `MODE_FLOAT'. OVERFLOW is nonzero if the value is already known to
855 If VALUE is not valid or if OVERFLOW is nonzero, you should set OVERFLOW to
856 1 and then assign some valid value to VALUE. Allowing an invalid value to
857 go through the compiler can produce incorrect assembler code which may even
858 cause Unix assemblers to crash.
860 This macro need not be defined if there is no work for it to do. */
861 /* #define CHECK_FLOAT_VALUE(MODE, VALUE, OVERFLOW) */
863 /* A code distinguishing the floating point format of the target machine.
864 There are three defined values:
867 This code indicates IEEE floating point. It is the default;
868 there is no need to define this macro when the format is IEEE.
871 This code indicates the peculiar format used on the Vax.
873 UNKNOWN_FLOAT_FORMAT'
874 This code indicates any other format.
876 The value of this macro is compared with `HOST_FLOAT_FORMAT' (*note
877 Config::.) to determine whether the target machine has the same format as
878 the host machine. If any other formats are actually in use on supported
879 machines, new codes should be defined for them.
881 The ordering of the component words of floating point values stored in
882 memory is controlled by `FLOAT_WORDS_BIG_ENDIAN' for the target machine and
883 `HOST_FLOAT_WORDS_BIG_ENDIAN' for the host. */
884 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
886 /* GNU CC supports two ways of implementing C++ vtables: traditional or with
887 so-called "thunks". The flag `-fvtable-thunk' chooses between them. Define
888 this macro to be a C expression for the default value of that flag. If
889 `DEFAULT_VTABLE_THUNKS' is 0, GNU CC uses the traditional implementation by
890 default. The "thunk" implementation is more efficient (especially if you
891 have provided an implementation of `ASM_OUTPUT_MI_THUNK', see *Note Function
892 Entry::), but is not binary compatible with code compiled using the
893 traditional implementation. If you are writing a new ports, define
894 `DEFAULT_VTABLE_THUNKS' to 1.
896 If you do not define this macro, the default for `-fvtable-thunk' is 0. */
897 #define DEFAULT_VTABLE_THUNKS 0
900 /* Layout of Source Language Data Types */
902 /* A C expression for the size in bits of the type `int' on the target machine.
903 If you don't define this, the default is one word. */
904 #define INT_TYPE_SIZE 32
906 /* Maximum number for the size in bits of the type `int' on the target machine.
907 If this is undefined, the default is `INT_TYPE_SIZE'. Otherwise, it is the
908 constant value that is the largest value that `INT_TYPE_SIZE' can have at
909 run-time. This is used in `cpp'. */
910 /* #define MAX_INT_TYPE_SIZE */
912 /* A C expression for the size in bits of the type `short' on the target
913 machine. If you don't define this, the default is half a word. (If this
914 would be less than one storage unit, it is rounded up to one unit.) */
915 #define SHORT_TYPE_SIZE 16
917 /* A C expression for the size in bits of the type `long' on the target
918 machine. If you don't define this, the default is one word. */
919 #define LONG_TYPE_SIZE 32
921 /* Maximum number for the size in bits of the type `long' on the target
922 machine. If this is undefined, the default is `LONG_TYPE_SIZE'. Otherwise,
923 it is the constant value that is the largest value that `LONG_TYPE_SIZE' can
924 have at run-time. This is used in `cpp'. */
925 /* #define MAX_LONG_TYPE_SIZE */
927 /* A C expression for the size in bits of the type `long long' on the target
928 machine. If you don't define this, the default is two words. If you want
929 to support GNU Ada on your machine, the value of macro must be at least 64. */
930 #define LONG_LONG_TYPE_SIZE 64
932 /* A C expression for the size in bits of the type `char' on the target
933 machine. If you don't define this, the default is one quarter of a word.
934 (If this would be less than one storage unit, it is rounded up to one unit.) */
935 #define CHAR_TYPE_SIZE 8
937 /* Maximum number for the size in bits of the type `char' on the target
938 machine. If this is undefined, the default is `CHAR_TYPE_SIZE'. Otherwise,
939 it is the constant value that is the largest value that `CHAR_TYPE_SIZE' can
940 have at run-time. This is used in `cpp'. */
941 /* #define MAX_CHAR_TYPE_SIZE */
943 /* A C expression for the size in bits of the type `float' on the target
944 machine. If you don't define this, the default is one word. */
945 #define FLOAT_TYPE_SIZE 32
947 /* A C expression for the size in bits of the type `double' on the target
948 machine. If you don't define this, the default is two words. */
949 #define DOUBLE_TYPE_SIZE 64
951 /* A C expression for the size in bits of the type `long double' on the target
952 machine. If you don't define this, the default is two words. */
953 #define LONG_DOUBLE_TYPE_SIZE 64
955 /* An expression whose value is 1 or 0, according to whether the type `char'
956 should be signed or unsigned by default. The user can always override this
957 default with the options `-fsigned-char' and `-funsigned-char'. */
958 #define DEFAULT_SIGNED_CHAR 1
960 /* A C expression to determine whether to give an `enum' type only as many
961 bytes as it takes to represent the range of possible values of that type. A
962 nonzero value means to do that; a zero value means all `enum' types should
963 be allocated like `int'.
965 If you don't define the macro, the default is 0. */
966 /* #define DEFAULT_SHORT_ENUMS */
968 /* A C expression for a string describing the name of the data type to use for
969 size values. The typedef name `size_t' is defined using the contents of the
972 The string can contain more than one keyword. If so, separate them with
973 spaces, and write first any length keyword, then `unsigned' if appropriate,
974 and finally `int'. The string must exactly match one of the data type names
975 defined in the function `init_decl_processing' in the file `c-decl.c'. You
976 may not omit `int' or change the order--that would cause the compiler to
979 If you don't define this macro, the default is `"long unsigned int"'.
981 Defined in svr4.h. */
982 /* #define SIZE_TYPE */
984 /* A C expression for a string describing the name of the data type to use for
985 the result of subtracting two pointers. The typedef name `ptrdiff_t' is
986 defined using the contents of the string. See `SIZE_TYPE' above for more
989 If you don't define this macro, the default is `"long int"'.
991 Defined in svr4.h. */
992 /* #define PTRDIFF_TYPE */
994 /* A C expression for a string describing the name of the data type to use for
995 wide characters. The typedef name `wchar_t' is defined using the contents
996 of the string. See `SIZE_TYPE' above for more information.
998 If you don't define this macro, the default is `"int"'.
1000 Defined in svr4.h. */
1001 /* #define WCHAR_TYPE */
1003 /* A C expression for the size in bits of the data type for wide characters.
1004 This is used in `cpp', which cannot make use of `WCHAR_TYPE'.
1006 Defined in svr4.h. */
1007 /* #define WCHAR_TYPE_SIZE */
1009 /* Maximum number for the size in bits of the data type for wide characters.
1010 If this is undefined, the default is `WCHAR_TYPE_SIZE'. Otherwise, it is
1011 the constant value that is the largest value that `WCHAR_TYPE_SIZE' can have
1012 at run-time. This is used in `cpp'. */
1013 /* #define MAX_WCHAR_TYPE_SIZE */
1015 /* Define this macro if the type of Objective C selectors should be `int'.
1017 If this macro is not defined, then selectors should have the type `struct
1018 objc_selector *'. */
1019 /* #define OBJC_INT_SELECTORS */
1021 /* Define this macro if the compiler can group all the selectors together into
1022 a vector and use just one label at the beginning of the vector. Otherwise,
1023 the compiler must give each selector its own assembler label.
1025 On certain machines, it is important to have a separate label for each
1026 selector because this enables the linker to eliminate duplicate selectors. */
1027 /* #define OBJC_SELECTORS_WITHOUT_LABELS */
1029 /* A C constant expression for the integer value for escape sequence
1031 #define TARGET_BELL 0x7
1033 /* C constant expressions for the integer values for escape sequences
1034 `\b', `\t' and `\n'. */
1035 #define TARGET_BS 0x8
1036 #define TARGET_TAB 0x9
1037 #define TARGET_NEWLINE 0xa
1039 /* C constant expressions for the integer values for escape sequences
1040 `\v', `\f' and `\r'. */
1041 #define TARGET_VT 0xb
1042 #define TARGET_FF 0xc
1043 #define TARGET_CR 0xd
1046 /* D30V register layout. */
1048 /* Return true if a value is inside a range */
1049 #define IN_RANGE_P(VALUE, LOW, HIGH) \
1050 (((unsigned)((VALUE) - (LOW))) <= ((unsigned)((HIGH) - (LOW))))
1052 /* General purpose registers. */
1053 #define GPR_FIRST 0 /* First gpr */
1054 #define GPR_LAST (GPR_FIRST + 63) /* Last gpr */
1055 #define GPR_R0 GPR_FIRST /* R0, constant 0 */
1056 #define GPR_ARG_FIRST (GPR_FIRST + 2) /* R2, first argument reg */
1057 #define GPR_ARG_LAST (GPR_FIRST + 17) /* R17, last argument reg */
1058 #define GPR_RET_VALUE GPR_ARG_FIRST /* R2, function return reg */
1059 #define GPR_ATMP_FIRST (GPR_FIRST + 20) /* R20, tmp to save accs */
1060 #define GPR_ATMP_LAST (GPR_FIRST + 21) /* R21, tmp to save accs */
1061 #define GPR_STACK_TMP (GPR_FIRST + 22) /* R22, tmp for saving stack */
1062 #define GPR_RES_FIRST (GPR_FIRST + 32) /* R32, first reserved reg */
1063 #define GPR_RES_LAST (GPR_FIRST + 35) /* R35, last reserved reg */
1064 #define GPR_FP (GPR_FIRST + 61) /* Frame pointer */
1065 #define GPR_LINK (GPR_FIRST + 62) /* Return address register */
1066 #define GPR_SP (GPR_FIRST + 63) /* Stack pointer */
1068 /* Argument register that is eliminated in favor of the frame and/or stack
1069 pointer. Also add register to point to where the return address is
1071 #define SPECIAL_REG_FIRST (GPR_LAST + 1)
1072 #define SPECIAL_REG_LAST (SPECIAL_REG_FIRST)
1073 #define ARG_POINTER_REGNUM (SPECIAL_REG_FIRST + 0)
1074 #define SPECIAL_REG_P(R) ((R) == SPECIAL_REG_FIRST)
1076 #define GPR_OR_SPECIAL_REG_P(R) IN_RANGE_P (R, GPR_FIRST, SPECIAL_REG_LAST)
1077 #define GPR_P(R) IN_RANGE_P (R, GPR_FIRST, GPR_LAST)
1078 #define GPR_OR_PSEUDO_P(R) (GPR_OR_SPECIAL_REG_P (R) \
1079 || (R) >= FIRST_PSEUDO_REGISTER)
1082 #define FLAG_FIRST (SPECIAL_REG_LAST + 1) /* First flag */
1083 #define FLAG_LAST (FLAG_FIRST + 7) /* Last flag */
1084 #define FLAG_F0 (FLAG_FIRST) /* F0, used in prediction */
1085 #define FLAG_F1 (FLAG_FIRST + 1) /* F1, used in prediction */
1086 #define FLAG_F2 (FLAG_FIRST + 2) /* F2, general flag */
1087 #define FLAG_F3 (FLAG_FIRST + 3) /* F3, general flag */
1088 #define FLAG_SAT (FLAG_FIRST + 4) /* F4, saturation flag */
1089 #define FLAG_OVERFLOW (FLAG_FIRST + 5) /* F5, overflow flag */
1090 #define FLAG_ACC_OVER (FLAG_FIRST + 6) /* F6, accumulated overflow */
1091 #define FLAG_CARRY (FLAG_FIRST + 7) /* F7, carry/borrow flag */
1092 #define FLAG_BORROW FLAG_CARRY
1094 #define FLAG_P(R) IN_RANGE_P (R, FLAG_FIRST, FLAG_LAST)
1095 #define FLAG_OR_PSEUDO_P(R) (FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1097 #define BR_FLAG_P(R) IN_RANGE_P (R, FLAG_F0, FLAG_F1)
1098 #define BR_FLAG_OR_PSEUDO_P(R) (BR_FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1101 #define ACCUM_FIRST (FLAG_LAST + 1) /* First accumulator */
1102 #define ACCUM_A0 ACCUM_FIRST /* Register A0 */
1103 #define ACCUM_A1 (ACCUM_FIRST + 1) /* Register A1 */
1104 #define ACCUM_LAST (ACCUM_FIRST + 1) /* Last accumulator */
1106 #define ACCUM_P(R) IN_RANGE_P (R, ACCUM_FIRST, ACCUM_LAST)
1107 #define ACCUM_OR_PSEUDO_P(R) (ACCUM_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1109 /* Special registers. Note, we only define the registers that can actually
1111 #define CR_FIRST (ACCUM_LAST + 1) /* First CR */
1112 #define CR_LAST (CR_FIRST + 14) /* Last CR */
1113 #define CR_PSW (CR_FIRST + 0) /* CR0, Program status word */
1114 #define CR_BPSW (CR_FIRST + 1) /* CR1, Backup PSW */
1115 #define CR_PC (CR_FIRST + 2) /* CR2, Program counter */
1116 #define CR_BPC (CR_FIRST + 3) /* CR3, Backup PC */
1117 #define CR_DPSW (CR_FIRST + 4) /* CR4, Debug PSW */
1118 #define CR_DPC (CR_FIRST + 5) /* CR5, Debug PC */
1119 #define CR_RPT_C (CR_FIRST + 6) /* CR7, loop count register */
1120 #define CR_RPT_S (CR_FIRST + 7) /* CR8, loop start address */
1121 #define CR_RPT_E (CR_FIRST + 8) /* CR9, loop end address */
1122 #define CR_MOD_S (CR_FIRST + 9) /* CR10, modulo address start*/
1123 #define CR_MOD_E (CR_FIRST + 10) /* CR11, modulo address */
1124 #define CR_IBA (CR_FIRST + 11) /* CR14, Interrupt break addr */
1125 #define CR_EIT_VB (CR_FIRST + 12) /* CR15, EIT vector address */
1126 #define CR_INT_S (CR_FIRST + 13) /* CR16, Interrupt status */
1127 #define CR_INT_M (CR_FIRST + 14) /* CR17, Interrupt mask */
1129 #define CR_P(R) IN_RANGE_P (R, CR_FIRST, CR_LAST)
1130 #define CR_OR_PSEUDO_P(R) (CR_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1133 /* Register Basics */
1135 /* Number of hardware registers known to the compiler. They receive numbers 0
1136 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
1137 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
1138 #define FIRST_PSEUDO_REGISTER (CR_LAST + 1)
1140 /* An initializer that says which registers are used for fixed purposes all
1141 throughout the compiled code and are therefore not available for general
1142 allocation. These would include the stack pointer, the frame pointer
1143 (except on machines where that can be used as a general register when no
1144 frame pointer is needed), the program counter on machines where that is
1145 considered one of the addressable registers, and any other numbered register
1146 with a standard use.
1148 This information is expressed as a sequence of numbers, separated by commas
1149 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
1152 The table initialized from this macro, and the table initialized by the
1153 following one, may be overridden at run time either automatically, by the
1154 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
1155 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
1156 #define FIXED_REGISTERS \
1158 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R0 - R15 */ \
1159 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
1160 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
1161 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
1163 0, 0, 0, 0, 1, 1, 1, 1, /* F0 - F7 */ \
1164 0, 0, /* A0 - A1 */ \
1165 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
1168 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
1169 general) by function calls as well as for fixed registers. This macro
1170 therefore identifies the registers that are not available for general
1171 allocation of values that must live across function calls.
1173 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
1174 saves it on function entry and restores it on function exit, if the register
1175 is used within the function. */
1176 #define CALL_USED_REGISTERS \
1178 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R0 - R15 */ \
1179 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
1180 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
1181 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
1183 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - F7 */ \
1184 1, 0, /* A0 - A1 */ \
1185 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
1188 /* Zero or more C statements that may conditionally modify two variables
1189 `fixed_regs' and `call_used_regs' (both of type `char []') after they have
1190 been initialized from the two preceding macros.
1192 This is necessary in case the fixed or call-clobbered registers depend on
1195 You need not define this macro if it has no work to do.
1197 If the usage of an entire class of registers depends on the target flags,
1198 you may indicate this to GCC by using this macro to modify `fixed_regs' and
1199 `call_used_regs' to 1 for each of the registers in the classes which should
1200 not be used by GCC. Also define the macro `REG_CLASS_FROM_LETTER' to return
1201 `NO_REGS' if it is called with a letter for a class that shouldn't be used.
1203 (However, if this class is not included in `GENERAL_REGS' and all of the
1204 insn patterns whose constraints permit this class are controlled by target
1205 switches, then GCC will automatically avoid using these registers when the
1206 target switches are opposed to them.) */
1207 /* #define CONDITIONAL_REGISTER_USAGE */
1209 /* If this macro is defined and has a nonzero value, it means that `setjmp' and
1210 related functions fail to save the registers, or that `longjmp' fails to
1211 restore them. To compensate, the compiler avoids putting variables in
1212 registers in functions that use `setjmp'. */
1213 /* #define NON_SAVING_SETJMP */
1215 /* Define this macro if the target machine has register windows. This C
1216 expression returns the register number as seen by the called function
1217 corresponding to the register number OUT as seen by the calling function.
1218 Return OUT if register number OUT is not an outbound register. */
1219 /* #define INCOMING_REGNO(OUT) */
1221 /* Define this macro if the target machine has register windows. This C
1222 expression returns the register number as seen by the calling function
1223 corresponding to the register number IN as seen by the called function.
1224 Return IN if register number IN is not an inbound register. */
1225 /* #define OUTGOING_REGNO(IN) */
1228 /* Order of allocation of registers */
1230 /* If defined, an initializer for a vector of integers, containing the numbers
1231 of hard registers in the order in which GNU CC should prefer to use them
1232 (from most preferred to least).
1234 If this macro is not defined, registers are used lowest numbered first (all
1237 One use of this macro is on machines where the highest numbered registers
1238 must always be saved and the save-multiple-registers instruction supports
1239 only sequences of consecutive registers. On such machines, define
1240 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered
1241 allocatable register first. */
1243 #define REG_ALLOC_ORDER \
1245 /* volatile registers */ \
1246 GPR_FIRST + 2, GPR_FIRST + 3, GPR_FIRST + 4, GPR_FIRST + 5, \
1247 GPR_FIRST + 6, GPR_FIRST + 7, GPR_FIRST + 8, GPR_FIRST + 9, \
1248 GPR_FIRST + 10, GPR_FIRST + 11, GPR_FIRST + 12, GPR_FIRST + 13, \
1249 GPR_FIRST + 14, GPR_FIRST + 15, GPR_FIRST + 16, GPR_FIRST + 17, \
1250 GPR_FIRST + 18, GPR_FIRST + 19, GPR_FIRST + 20, GPR_FIRST + 21, \
1251 GPR_FIRST + 22, GPR_FIRST + 23, GPR_FIRST + 24, GPR_FIRST + 25, \
1254 /* saved registers */ \
1255 GPR_FIRST + 34, GPR_FIRST + 35, GPR_FIRST + 36, GPR_FIRST + 37, \
1256 GPR_FIRST + 38, GPR_FIRST + 39, GPR_FIRST + 40, GPR_FIRST + 41, \
1257 GPR_FIRST + 42, GPR_FIRST + 43, GPR_FIRST + 44, GPR_FIRST + 45, \
1258 GPR_FIRST + 46, GPR_FIRST + 47, GPR_FIRST + 48, GPR_FIRST + 49, \
1259 GPR_FIRST + 50, GPR_FIRST + 51, GPR_FIRST + 52, GPR_FIRST + 53, \
1260 GPR_FIRST + 54, GPR_FIRST + 55, GPR_FIRST + 56, GPR_FIRST + 57, \
1261 GPR_FIRST + 58, GPR_FIRST + 59, GPR_FIRST + 60, GPR_FIRST + 61, \
1265 FLAG_F2, FLAG_F3, FLAG_F0, FLAG_F1, \
1266 FLAG_SAT, FLAG_OVERFLOW, FLAG_ACC_OVER, FLAG_CARRY, \
1269 ACCUM_FIRST + 0, ACCUM_FIRST + 1, \
1271 /* fixed registers */ \
1272 GPR_FIRST + 0, GPR_FIRST + 26, GPR_FIRST + 27, GPR_FIRST + 28, \
1273 GPR_FIRST + 29, GPR_FIRST + 30, GPR_FIRST + 31, GPR_FIRST + 32, \
1274 GPR_FIRST + 33, GPR_FIRST + 63, \
1275 CR_PSW, CR_BPSW, CR_PC, CR_BPC, \
1276 CR_DPSW, CR_DPC, CR_RPT_C, CR_RPT_S, \
1277 CR_RPT_E, CR_MOD_S, CR_MOD_E, CR_IBA, \
1278 CR_EIT_VB, CR_INT_S, CR_INT_M, \
1279 ARG_POINTER_REGNUM, \
1282 /* A C statement (sans semicolon) to choose the order in which to allocate hard
1283 registers for pseudo-registers local to a basic block.
1285 Store the desired register order in the array `reg_alloc_order'. Element 0
1286 should be the register to allocate first; element 1, the next register; and
1289 The macro body should not assume anything about the contents of
1290 `reg_alloc_order' before execution of the macro.
1292 On most machines, it is not necessary to define this macro. */
1293 /* #define ORDER_REGS_FOR_LOCAL_ALLOC */
1296 /* How Values Fit in Registers */
1298 /* A C expression for the number of consecutive hard registers, starting at
1299 register number REGNO, required to hold a value of mode MODE.
1301 On a machine where all registers are exactly one word, a suitable definition
1304 #define HARD_REGNO_NREGS(REGNO, MODE) \
1305 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
1306 / UNITS_PER_WORD)) */
1308 #define HARD_REGNO_NREGS(REGNO, MODE) \
1309 (ACCUM_P (REGNO) ? ((GET_MODE_SIZE (MODE) + 2*UNITS_PER_WORD - 1) \
1310 / (2*UNITS_PER_WORD)) \
1311 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
1314 /* A C expression that is nonzero if it is permissible to store a value of mode
1315 MODE in hard register number REGNO (or in several registers starting with
1316 that one). For a machine where all registers are equivalent, a suitable
1319 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
1321 It is not necessary for this macro to check for the numbers of fixed
1322 registers, because the allocation mechanism considers them to be always
1325 On some machines, double-precision values must be kept in even/odd register
1326 pairs. The way to implement that is to define this macro to reject odd
1327 register numbers for such modes.
1329 The minimum requirement for a mode to be OK in a register is that the
1330 `movMODE' instruction pattern support moves between the register and any
1331 other hard register for which the mode is OK; and that moving a value into
1332 the register and back out not alter it.
1334 Since the same instruction used to move `SImode' will work for all narrower
1335 integer modes, it is not necessary on any machine for `HARD_REGNO_MODE_OK'
1336 to distinguish between these modes, provided you define patterns `movhi',
1337 etc., to take advantage of this. This is useful because of the interaction
1338 between `HARD_REGNO_MODE_OK' and `MODES_TIEABLE_P'; it is very desirable for
1339 all integer modes to be tieable.
1341 Many machines have special registers for floating point arithmetic. Often
1342 people assume that floating point machine modes are allowed only in floating
1343 point registers. This is not true. Any registers that can hold integers
1344 can safely *hold* a floating point machine mode, whether or not floating
1345 arithmetic can be done on it in those registers. Integer move instructions
1346 can be used to move the values.
1348 On some machines, though, the converse is true: fixed-point machine modes
1349 may not go in floating registers. This is true if the floating registers
1350 normalize any value stored in them, because storing a non-floating value
1351 there would garble it. In this case, `HARD_REGNO_MODE_OK' should reject
1352 fixed-point machine modes in floating registers. But if the floating
1353 registers do not automatically normalize, if you can store any bit pattern
1354 in one and retrieve it unchanged without a trap, then any machine mode may
1355 go in a floating register, so you can define this macro to say so.
1357 The primary significance of special floating registers is rather that they
1358 are the registers acceptable in floating point arithmetic instructions.
1359 However, this is of no concern to `HARD_REGNO_MODE_OK'. You handle it by
1360 writing the proper constraints for those instructions.
1362 On some machines, the floating registers are especially slow to access, so
1363 that it is better to store a value in a stack frame than in such a register
1364 if floating point arithmetic is not being done. As long as the floating
1365 registers are not in class `GENERAL_REGS', they will not be used unless some
1366 pattern's constraint asks for one. */
1368 extern unsigned char hard_regno_mode_ok
[][FIRST_PSEUDO_REGISTER
];
1369 #define HARD_REGNO_MODE_OK(REGNO, MODE) hard_regno_mode_ok[ (int)MODE ][ REGNO ]
1371 /* A C expression that is nonzero if it is desirable to choose register
1372 allocation so as to avoid move instructions between a value of mode MODE1
1373 and a value of mode MODE2.
1375 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
1376 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
1379 extern unsigned char modes_tieable_p
[];
1380 #define MODES_TIEABLE_P(MODE1, MODE2) \
1381 modes_tieable_p[ (((int)(MODE1)) * (NUM_MACHINE_MODES)) + (int)(MODE2) ]
1383 /* Define this macro if the compiler should avoid copies to/from CCmode
1384 registers. You should only define this macro if support fo copying to/from
1385 CCmode is incomplete. */
1387 /* On the D30V, copying to/from CCmode is complete, but since there are only
1388 two CC registers usable for conditional tests, this helps gcse not compound
1389 the reload problem. */
1390 #define AVOID_CCMODE_COPIES
1393 /* Handling Leaf Functions */
1395 /* A C initializer for a vector, indexed by hard register number, which
1396 contains 1 for a register that is allowable in a candidate for leaf function
1399 If leaf function treatment involves renumbering the registers, then the
1400 registers marked here should be the ones before renumbering--those that GNU
1401 CC would ordinarily allocate. The registers which will actually be used in
1402 the assembler code, after renumbering, should not be marked with 1 in this
1405 Define this macro only if the target machine offers a way to optimize the
1406 treatment of leaf functions. */
1407 /* #define LEAF_REGISTERS */
1409 /* A C expression whose value is the register number to which REGNO should be
1410 renumbered, when a function is treated as a leaf function.
1412 If REGNO is a register number which should not appear in a leaf function
1413 before renumbering, then the expression should yield -1, which will cause
1414 the compiler to abort.
1416 Define this macro only if the target machine offers a way to optimize the
1417 treatment of leaf functions, and registers need to be renumbered to do this. */
1418 /* #define LEAF_REG_REMAP(REGNO) */
1421 /* Registers That Form a Stack. */
1423 /* Define this if the machine has any stack-like registers. */
1424 /* #define STACK_REGS */
1426 /* The number of the first stack-like register. This one is the top
1428 /* #define FIRST_STACK_REG */
1430 /* The number of the last stack-like register. This one is the
1431 bottom of the stack. */
1432 /* #define LAST_STACK_REG */
1435 /* Register Classes */
1437 /* An enumeral type that must be defined with all the register class names as
1438 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
1439 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
1440 which is not a register class but rather tells how many classes there are.
1442 Each register class has a number, which is the value of casting the class
1443 name to type `int'. The number serves as an index in many of the tables
1462 #define GENERAL_REGS GPR_REGS
1464 /* The number of distinct register classes, defined as follows:
1466 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
1467 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
1469 /* An initializer containing the names of the register classes as C string
1470 constants. These names are used in writing some of the debugging dumps. */
1471 #define REG_CLASS_NAMES \
1477 "OTHER_FLAG_REGS", \
1487 /* Create mask bits for 3rd word of REG_CLASS_CONTENTS */
1488 #define MASK_WORD3(REG) ((long)1 << ((REG) - 64))
1491 #define REPEAT_MASK MASK_WORD3 (CR_RPT_C)
1492 #define CR_MASK (MASK_WORD3 (CR_PSW) | MASK_WORD3 (CR_BPSW) \
1493 | MASK_WORD3 (CR_PC) | MASK_WORD3 (CR_BPC) \
1494 | MASK_WORD3 (CR_DPSW) | MASK_WORD3 (CR_DPC) \
1495 | MASK_WORD3 (CR_RPT_C) | MASK_WORD3 (CR_RPT_S) \
1496 | MASK_WORD3 (CR_RPT_E) | MASK_WORD3 (CR_MOD_S) \
1497 | MASK_WORD3 (CR_MOD_E) | MASK_WORD3 (CR_IBA) \
1498 | MASK_WORD3 (CR_EIT_VB) | MASK_WORD3 (CR_INT_S) \
1499 | MASK_WORD3 (CR_INT_M))
1501 #define ACCUM_MASK (MASK_WORD3 (ACCUM_A0) | MASK_WORD3 (ACCUM_A1))
1502 #define OTHER_FLAG_MASK (MASK_WORD3 (FLAG_F2) | MASK_WORD3 (FLAG_F3) \
1503 | MASK_WORD3 (FLAG_SAT) | MASK_WORD3 (FLAG_OVERFLOW) \
1504 | MASK_WORD3 (FLAG_ACC_OVER) | MASK_WORD3 (FLAG_CARRY))
1506 #define F0_MASK MASK_WORD3 (FLAG_F0)
1507 #define F1_MASK MASK_WORD3 (FLAG_F1)
1508 #define BR_FLAG_MASK (F0_MASK | F1_MASK)
1509 #define FLAG_MASK (BR_FLAG_MASK | OTHER_FLAG_MASK)
1510 #define SPECIAL_MASK MASK_WORD3 (ARG_POINTER_REGNUM)
1512 #define ALL_MASK (CR_MASK | ACCUM_MASK | FLAG_MASK | SPECIAL_MASK)
1514 /* An initializer containing the contents of the register classes, as integers
1515 which are bit masks. The Nth integer specifies the contents of class N.
1516 The way the integer MASK is interpreted is that register R is in the class
1517 if `MASK & (1 << R)' is 1.
1519 When the machine has more than 32 registers, an integer does not suffice.
1520 Then the integers are replaced by sub-initializers, braced groupings
1521 containing several integers. Each sub-initializer must be suitable as an
1522 initializer for the type `HARD_REG_SET' which is defined in
1523 `hard-reg-set.h'. */
1524 #define REG_CLASS_CONTENTS \
1526 { 0x00000000, 0x00000000, NO_MASK }, /* NO_REGS */ \
1527 { 0x00000000, 0x00000000, REPEAT_MASK }, /* REPEAT_REGS */ \
1528 { 0x00000000, 0x00000000, CR_MASK }, /* CR_REGS */ \
1529 { 0x00000000, 0x00000000, ACCUM_MASK }, /* ACCUM_REGS */ \
1530 { 0x00000000, 0x00000000, OTHER_FLAG_MASK }, /* OTHER_FLAG_REGS */ \
1531 { 0x00000000, 0x00000000, F0_MASK }, /* F0_REGS */ \
1532 { 0x00000000, 0x00000000, F1_MASK }, /* F1_REGS */ \
1533 { 0x00000000, 0x00000000, BR_FLAG_MASK }, /* BR_FLAG_REGS */ \
1534 { 0x00000000, 0x00000000, FLAG_MASK }, /* FLAG_REGS */ \
1535 { 0xfffffffc, 0x3fffffff, NO_MASK }, /* EVEN_REGS */ \
1536 { 0xffffffff, 0xffffffff, SPECIAL_MASK }, /* GPR_REGS */ \
1537 { 0xffffffff, 0xffffffff, ALL_MASK }, /* ALL_REGS */ \
1540 /* A C expression whose value is a register class containing hard register
1541 REGNO. In general there is more than one such class; choose a class which
1542 is "minimal", meaning that no smaller class also contains the register. */
1544 extern enum reg_class regno_reg_class
[];
1545 #define REGNO_REG_CLASS(REGNO) regno_reg_class[ (REGNO) ]
1547 /* A macro whose definition is the name of the class to which a valid base
1548 register must belong. A base register is one used in an address which is
1549 the register value plus a displacement. */
1550 #define BASE_REG_CLASS GPR_REGS
1552 /* A macro whose definition is the name of the class to which a valid index
1553 register must belong. An index register is one used in an address where its
1554 value is either multiplied by a scale factor or added to another register
1555 (as well as added to a displacement). */
1556 #define INDEX_REG_CLASS GPR_REGS
1558 /* A C expression which defines the machine-dependent operand constraint
1559 letters for register classes. If CHAR is such a letter, the value should be
1560 the register class corresponding to it. Otherwise, the value should be
1561 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
1562 will not be passed to this macro; you do not need to handle it.
1564 The following letters are unavailable, due to being used as
1569 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
1570 'Q', 'R', 'S', 'T', 'U'
1572 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
1574 extern enum reg_class reg_class_from_letter
[];
1575 #define REG_CLASS_FROM_LETTER(CHAR) reg_class_from_letter[ CHAR ]
1577 /* A C expression which is nonzero if register number NUM is suitable for use
1578 as a base register in operand addresses. It may be either a suitable hard
1579 register or a pseudo register that has been allocated such a hard register. */
1581 #define REGNO_OK_FOR_BASE_P(NUM) \
1582 ((NUM) < FIRST_PSEUDO_REGISTER \
1584 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
1587 /* A C expression which is nonzero if register number NUM is suitable for use
1588 as an index register in operand addresses. It may be either a suitable hard
1589 register or a pseudo register that has been allocated such a hard register.
1591 The difference between an index register and a base register is that the
1592 index register may be scaled. If an address involves the sum of two
1593 registers, neither one of them scaled, then either one may be labeled the
1594 "base" and the other the "index"; but whichever labeling is used must fit
1595 the machine's constraints of which registers may serve in each capacity.
1596 The compiler will try both labelings, looking for one that is valid, and
1597 will reload one or both registers only if neither labeling works. */
1599 #define REGNO_OK_FOR_INDEX_P(NUM) \
1600 ((NUM) < FIRST_PSEUDO_REGISTER \
1602 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
1604 /* A C expression that places additional restrictions on the register class to
1605 use when it is necessary to copy value X into a register in class CLASS.
1606 The value is a register class; perhaps CLASS, or perhaps another, smaller
1607 class. On many machines, the following definition is safe:
1609 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
1611 Sometimes returning a more restrictive class makes better code. For
1612 example, on the 68000, when X is an integer constant that is in range for a
1613 `moveq' instruction, the value of this macro is always `DATA_REGS' as long
1614 as CLASS includes the data registers. Requiring a data register guarantees
1615 that a `moveq' will be used.
1617 If X is a `const_double', by returning `NO_REGS' you can force X into a
1618 memory constant. This is useful on certain machines where immediate
1619 floating values cannot be loaded into certain kinds of registers. */
1620 #define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS
1622 /* Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of input
1623 reloads. If you don't define this macro, the default is to use CLASS,
1625 /* #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) */
1627 /* A C expression that places additional restrictions on the register class to
1628 use when it is necessary to be able to hold a value of mode MODE in a reload
1629 register for which class CLASS would ordinarily be used.
1631 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when there are
1632 certain modes that simply can't go in certain reload classes.
1634 The value is a register class; perhaps CLASS, or perhaps another, smaller
1637 Don't define this macro unless the target machine has limitations which
1638 require the macro to do something nontrivial. */
1639 /* #define LIMIT_RELOAD_CLASS(MODE, CLASS) */
1641 /* Many machines have some registers that cannot be copied directly to or from
1642 memory or even from other types of registers. An example is the `MQ'
1643 register, which on most machines, can only be copied to or from general
1644 registers, but not memory. Some machines allow copying all registers to and
1645 from memory, but require a scratch register for stores to some memory
1646 locations (e.g., those with symbolic address on the RT, and those with
1647 certain symbolic address on the Sparc when compiling PIC). In some cases,
1648 both an intermediate and a scratch register are required.
1650 You should define these macros to indicate to the reload phase that it may
1651 need to allocate at least one register for a reload in addition to the
1652 register to contain the data. Specifically, if copying X to a register
1653 CLASS in MODE requires an intermediate register, you should define
1654 `SECONDARY_INPUT_RELOAD_CLASS' to return the largest register class all of
1655 whose registers can be used as intermediate registers or scratch registers.
1657 If copying a register CLASS in MODE to X requires an intermediate or scratch
1658 register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be defined to return the
1659 largest register class required. If the requirements for input and output
1660 reloads are the same, the macro `SECONDARY_RELOAD_CLASS' should be used
1661 instead of defining both macros identically.
1663 The values returned by these macros are often `GENERAL_REGS'. Return
1664 `NO_REGS' if no spare register is needed; i.e., if X can be directly copied
1665 to or from a register of CLASS in MODE without requiring a scratch register.
1666 Do not define this macro if it would always return `NO_REGS'.
1668 If a scratch register is required (either with or without an intermediate
1669 register), you should define patterns for `reload_inM' or `reload_outM', as
1670 required (*note Standard Names::.. These patterns, which will normally be
1671 implemented with a `define_expand', should be similar to the `movM'
1672 patterns, except that operand 2 is the scratch register.
1674 Define constraints for the reload register and scratch register that contain
1675 a single register class. If the original reload register (whose class is
1676 CLASS) can meet the constraint given in the pattern, the value returned by
1677 these macros is used for the class of the scratch register. Otherwise, two
1678 additional reload registers are required. Their classes are obtained from
1679 the constraints in the insn pattern.
1681 X might be a pseudo-register or a `subreg' of a pseudo-register, which could
1682 either be in a hard register or in memory. Use `true_regnum' to find out;
1683 it will return -1 if the pseudo is in memory and the hard register number if
1684 it is in a register.
1686 These macros should not be used in the case where a particular class of
1687 registers can only be copied to memory and not to another class of
1688 registers. In that case, secondary reload registers are not needed and
1689 would not be helpful. Instead, a stack location must be used to perform the
1690 copy and the `movM' pattern should use memory as a intermediate storage.
1691 This case often occurs between floating-point and general registers. */
1693 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
1694 ((CLASS) == GPR_REGS ? NO_REGS \
1695 : (CLASS) == EVEN_REGS ? NO_REGS \
1696 : (CLASS) == ACCUM_REGS ? EVEN_REGS \
1699 /* #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) */
1700 /* #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) */
1702 /* Certain machines have the property that some registers cannot be copied to
1703 some other registers without using memory. Define this macro on those
1704 machines to be a C expression that is non-zero if objects of mode M in
1705 registers of CLASS1 can only be copied to registers of class CLASS2 by
1706 storing a register of CLASS1 into memory and loading that memory location
1707 into a register of CLASS2.
1709 Do not define this macro if its value would always be zero. */
1710 /* #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, M) */
1712 /* Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler allocates a
1713 stack slot for a memory location needed for register copies. If this macro
1714 is defined, the compiler instead uses the memory location defined by this
1717 Do not define this macro if you do not define
1718 `SECONDARY_MEMORY_NEEDED'. */
1719 /* #define SECONDARY_MEMORY_NEEDED_RTX(MODE) */
1721 /* When the compiler needs a secondary memory location to copy between two
1722 registers of mode MODE, it normally allocates sufficient memory to hold a
1723 quantity of `BITS_PER_WORD' bits and performs the store and load operations
1724 in a mode that many bits wide and whose class is the same as that of MODE.
1726 This is right thing to do on most machines because it ensures that all bits
1727 of the register are copied and prevents accesses to the registers in a
1728 narrower mode, which some machines prohibit for floating-point registers.
1730 However, this default behavior is not correct on some machines, such as the
1731 DEC Alpha, that store short integers in floating-point registers differently
1732 than in integer registers. On those machines, the default widening will not
1733 work correctly and you must define this macro to suppress that widening in
1734 some cases. See the file `alpha.h' for details.
1736 Do not define this macro if you do not define `SECONDARY_MEMORY_NEEDED' or
1737 if widening MODE to a mode that is `BITS_PER_WORD' bits wide is correct for
1739 /* #define SECONDARY_MEMORY_NEEDED_MODE(MODE) */
1741 /* Normally the compiler avoids choosing registers that have been explicitly
1742 mentioned in the rtl as spill registers (these registers are normally those
1743 used to pass parameters and return values). However, some machines have so
1744 few registers of certain classes that there would not be enough registers to
1745 use as spill registers if this were done.
1747 Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero value on
1748 these machines. When this macro has a non-zero value, the compiler allows
1749 registers explicitly used in the rtl to be used as spill registers but
1750 avoids extending the lifetime of these registers.
1752 It is always safe to define this macro with a non-zero value, but if you
1753 unnecessarily define it, you will reduce the amount of optimizations that
1754 can be performed in some cases. If you do not define this macro with a
1755 non-zero value when it is required, the compiler will run out of spill
1756 registers and print a fatal error message. For most machines, you should
1757 not define this macro at all. */
1758 /* #define SMALL_REGISTER_CLASSES */
1760 /* A C expression whose value is nonzero if pseudos that have been assigned to
1761 registers of class CLASS would likely be spilled because registers of CLASS
1762 are needed for spill registers.
1764 The default value of this macro returns 1 if CLASS has exactly one register
1765 and zero otherwise. On most machines, this default should be used. Only
1766 define this macro to some other expression if pseudo allocated by
1767 `local-alloc.c' end up in memory because their hard registers were needed
1768 for spill registers. If this macro returns nonzero for those classes, those
1769 pseudos will only be allocated by `global.c', which knows how to reallocate
1770 the pseudo to another register. If there would not be another register
1771 available for reallocation, you should not change the definition of this
1772 macro since the only effect of such a definition would be to slow down
1773 register allocation. */
1774 #define CLASS_LIKELY_SPILLED_P(CLASS) \
1775 ((CLASS) != GPR_REGS && (CLASS) != EVEN_REGS)
1777 /* A C expression for the maximum number of consecutive registers of
1778 class CLASS needed to hold a value of mode MODE.
1780 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value
1781 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
1782 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
1784 This macro helps control the handling of multiple-word values in
1787 #define CLASS_MAX_NREGS(CLASS, MODE) \
1788 (((CLASS) == ACCUM_REGS) \
1789 ? ((GET_MODE_SIZE (MODE) + 8 - 1) / 8) \
1790 : ((GET_MODE_SIZE (MODE) + 4 - 1) / 4))
1792 /* A C expression that defines the machine-dependent operand constraint letters
1793 (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
1794 If C is one of those letters, the expression should check that VALUE, an
1795 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C
1796 is not one of those letters, the value should be 0 regardless of VALUE. */
1797 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1798 ((C) == 'I' ? IN_RANGE_P (VALUE, -32, 31) \
1799 : (C) == 'J' ? IN_RANGE_P (VALUE, 0, 31) \
1800 : (C) == 'K' ? IN_RANGE_P (exact_log2 (VALUE), 0, 31) \
1801 : (C) == 'L' ? IN_RANGE_P (exact_log2 (~ (VALUE)), 0, 31) \
1802 : (C) == 'M' ? ((VALUE) == 32) \
1803 : (C) == 'N' ? ((VALUE) == 1) \
1804 : (C) == 'O' ? ((VALUE) == 0) \
1805 : (C) == 'P' ? IN_RANGE_P (VALUE, 32, 63) \
1808 /* A C expression that defines the machine-dependent operand constraint letters
1809 (`G', `H') that specify particular ranges of `const_double' values.
1811 If C is one of those letters, the expression should check that VALUE, an RTX
1812 of code `const_double', is in the appropriate range and return 1 if so, 0
1813 otherwise. If C is not one of those letters, the value should be 0
1814 regardless of VALUE.
1816 `const_double' is used for all floating-point constants and for `DImode'
1817 fixed-point constants. A given letter can accept either or both kinds of
1818 values. It can use `GET_MODE' to distinguish between these kinds. */
1819 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
1820 ((C) == 'G' ? (CONST_DOUBLE_LOW (VALUE) == 0 \
1821 && CONST_DOUBLE_HIGH (VALUE) == 0) \
1822 : (C) == 'H' ? FALSE \
1825 /* A C expression that defines the optional machine-dependent constraint
1826 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
1827 types of operands, usually memory references, for the target machine.
1828 Normally this macro will not be defined. If it is required for a particular
1829 target machine, it should return 1 if VALUE corresponds to the operand type
1830 represented by the constraint letter C. If C is not defined as an extra
1831 constraint, the value returned should be 0 regardless of VALUE.
1833 For example, on the ROMP, load instructions cannot have their output in r0
1834 if the memory reference contains a symbolic address. Constraint letter `Q'
1835 is defined as representing a memory address that does *not* contain a
1836 symbolic address. An alternative is specified with a `Q' constraint on the
1837 input and `r' on the output. The next alternative specifies `m' on the
1838 input and a register class that does not include r0 on the output. */
1840 #define EXTRA_CONSTRAINT(VALUE, C) \
1841 (((C) == 'Q') ? short_memory_operand ((VALUE), GET_MODE (VALUE)) \
1842 : ((C) == 'R') ? single_reg_memory_operand ((VALUE), GET_MODE (VALUE)) \
1843 : ((C) == 'S') ? const_addr_memory_operand ((VALUE), GET_MODE (VALUE)) \
1844 : ((C) == 'T') ? long_memory_operand ((VALUE), GET_MODE (VALUE)) \
1845 : ((C) == 'U') ? FALSE \
1849 /* Basic Stack Layout */
1853 /* Structure used to define the d30v stack */
1854 typedef struct d30v_stack
{
1855 int varargs_p
; /* whether this is a varargs function */
1856 int varargs_size
; /* size to hold varargs args passed in regs */
1857 int vars_size
; /* variable save area size */
1858 int parm_size
; /* outgoing parameter size */
1859 int gpr_size
; /* size of saved GPR registers */
1860 int accum_size
; /* size of saved ACCUM registers */
1861 int total_size
; /* total bytes allocated for stack */
1862 /* which registers are to be saved */
1863 int save_offset
; /* offset from new sp to start saving vars at */
1864 int link_offset
; /* offset r62 is saved at */
1865 int memrefs_varargs
; /* # of 2 word memory references for varargs */
1866 int memrefs_2words
; /* # of 2 word memory references */
1867 int memrefs_1word
; /* # of 1 word memory references */
1868 /* 1 for ldw/stw ops; 2 for ld2w/st2w ops */
1869 unsigned char save_p
[FIRST_PSEUDO_REGISTER
];
1872 /* Define this macro if pushing a word onto the stack moves the stack pointer
1873 to a smaller address.
1875 When we say, "define this macro if ...," it means that the compiler checks
1876 this macro only with `#ifdef' so the precise definition used does not
1878 #define STACK_GROWS_DOWNWARD 1
1880 /* Define this macro if the addresses of local variable slots are at negative
1881 offsets from the frame pointer. */
1882 /* #define FRAME_GROWS_DOWNWARD */
1884 /* Define this macro if successive arguments to a function occupy decreasing
1885 addresses on the stack. */
1886 /* #define ARGS_GROW_DOWNWARD */
1888 /* Offset from the frame pointer to the first local variable slot to be
1891 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the
1892 first slot's length from `STARTING_FRAME_OFFSET'. Otherwise, it is found by
1893 adding the length of the first slot to the value `STARTING_FRAME_OFFSET'. */
1895 #define STARTING_FRAME_OFFSET \
1896 (D30V_ALIGN (current_function_outgoing_args_size, \
1897 (STACK_BOUNDARY / BITS_PER_UNIT)))
1899 /* Offset from the stack pointer register to the first location at which
1900 outgoing arguments are placed. If not specified, the default value of zero
1901 is used. This is the proper value for most machines.
1903 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1904 location at which outgoing arguments are placed. */
1905 /* #define STACK_POINTER_OFFSET */
1907 /* Offset from the argument pointer register to the first argument's address.
1908 On some machines it may depend on the data type of the function.
1910 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1911 argument's address. */
1912 #define FIRST_PARM_OFFSET(FUNDECL) 0
1914 /* Offset from the stack pointer register to an item dynamically allocated on
1915 the stack, e.g., by `alloca'.
1917 The default value for this macro is `STACK_POINTER_OFFSET' plus the length
1918 of the outgoing arguments. The default is correct for most machines. See
1919 `function.c' for details. */
1920 /* #define STACK_DYNAMIC_OFFSET(FUNDECL) */
1922 /* A C expression whose value is RTL representing the address in a stack frame
1923 where the pointer to the caller's frame is stored. Assume that FRAMEADDR is
1924 an RTL expression for the address of the stack frame itself.
1926 If you don't define this macro, the default is to return the value of
1927 FRAMEADDR--that is, the stack frame address is also the address of the stack
1928 word that points to the previous frame. */
1929 /* #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) */
1931 /* If defined, a C expression that produces the machine-specific code to setup
1932 the stack so that arbitrary frames can be accessed. For example, on the
1933 Sparc, we must flush all of the register windows to the stack before we can
1934 access arbitrary stack frames. This macro will seldom need to be defined. */
1935 /* #define SETUP_FRAME_ADDRESSES() */
1937 /* A C expression whose value is RTL representing the value of the return
1938 address for the frame COUNT steps up from the current frame, after the
1939 prologue. FRAMEADDR is the frame pointer of the COUNT frame, or the frame
1940 pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' is
1943 The value of the expression must always be the correct address when COUNT is
1944 zero, but may be `NULL_RTX' if there is not way to determine the return
1945 address of other frames. */
1947 /* ??? This definition fails for leaf functions. There is currently no
1948 general solution for this problem. */
1950 /* ??? There appears to be no way to get the return address of any previous
1951 frame except by disassembling instructions in the prologue/epilogue.
1952 So currently we support only the current frame. */
1954 #define RETURN_ADDR_RTX(COUNT, FRAME) \
1955 ((COUNT) == 0 ? d30v_return_addr() : const0_rtx)
1957 /* Define this if the return address of a particular stack frame is
1958 accessed from the frame pointer of the previous stack frame. */
1959 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */
1961 /* A C expression whose value is RTL representing the location of the incoming
1962 return address at the beginning of any function, before the prologue. This
1963 RTL is either a `REG', indicating that the return value is saved in `REG',
1964 or a `MEM' representing a location in the stack.
1966 You only need to define this macro if you want to support call frame
1967 debugging information like that provided by DWARF 2. */
1969 /* Before the prologue, RA lives in r62. */
1970 #define INCOMING_RETURN_ADDR_RTX gen_rtx (REG, Pmode, GPR_LINK)
1972 /* A C expression whose value is an integer giving the offset, in bytes, from
1973 the value of the stack pointer register to the top of the stack frame at the
1974 beginning of any function, before the prologue. The top of the frame is
1975 defined to be the value of the stack pointer in the previous frame, just
1976 before the call instruction.
1978 You only need to define this macro if you want to support call frame
1979 debugging information like that provided by DWARF 2. */
1980 #define INCOMING_FRAME_SP_OFFSET 0
1982 /* Initialize data used by insn expanders. This is called from insn_emit,
1983 once for every function before code is generated. */
1985 #define INIT_EXPANDERS d30v_init_expanders ()
1988 /* Stack Checking. */
1990 /* A nonzero value if stack checking is done by the configuration files in a
1991 machine-dependent manner. You should define this macro if stack checking is
1992 require by the ABI of your machine or if you would like to have to stack
1993 checking in some more efficient way than GNU CC's portable approach. The
1994 default value of this macro is zero. */
1995 /* #define STACK_CHECK_BUILTIN */
1997 /* An integer representing the interval at which GNU CC must generate stack
1998 probe instructions. You will normally define this macro to be no larger
1999 than the size of the "guard pages" at the end of a stack area. The default
2000 value of 4096 is suitable for most systems. */
2001 /* #define STACK_CHECK_PROBE_INTERVAL */
2003 /* A integer which is nonzero if GNU CC should perform the stack probe as a
2004 load instruction and zero if GNU CC should use a store instruction. The
2005 default is zero, which is the most efficient choice on most systems. */
2006 /* #define STACK_CHECK_PROBE_LOAD */
2008 /* The number of bytes of stack needed to recover from a stack overflow, for
2009 languages where such a recovery is supported. The default value of 75 words
2010 should be adequate for most machines. */
2011 /* #define STACK_CHECK_PROTECT */
2013 /* The maximum size of a stack frame, in bytes. GNU CC will generate probe
2014 instructions in non-leaf functions to ensure at least this many bytes of
2015 stack are available. If a stack frame is larger than this size, stack
2016 checking will not be reliable and GNU CC will issue a warning. The default
2017 is chosen so that GNU CC only generates one instruction on most systems.
2018 You should normally not change the default value of this macro. */
2019 /* #define STACK_CHECK_MAX_FRAME_SIZE */
2021 /* GNU CC uses this value to generate the above warning message. It represents
2022 the amount of fixed frame used by a function, not including space for any
2023 callee-saved registers, temporaries and user variables. You need only
2024 specify an upper bound for this amount and will normally use the default of
2026 /* #define STACK_CHECK_FIXED_FRAME_SIZE */
2028 /* The maximum size, in bytes, of an object that GNU CC will place in the fixed
2029 area of the stack frame when the user specifies `-fstack-check'. GNU CC
2030 computed the default from the values of the above macros and you will
2031 normally not need to override that default. */
2032 /* #define STACK_CHECK_MAX_VAR_SIZE */
2035 /* Register That Address the Stack Frame. */
2037 /* The register number of the stack pointer register, which must also be a
2038 fixed register according to `FIXED_REGISTERS'. On most machines, the
2039 hardware determines which register this is. */
2040 #define STACK_POINTER_REGNUM GPR_SP
2042 /* The register number of the frame pointer register, which is used to access
2043 automatic variables in the stack frame. On some machines, the hardware
2044 determines which register this is. On other machines, you can choose any
2045 register you wish for this purpose. */
2046 #define FRAME_POINTER_REGNUM GPR_FP
2048 /* On some machines the offset between the frame pointer and starting offset of
2049 the automatic variables is not known until after register allocation has
2050 been done (for example, because the saved registers are between these two
2051 locations). On those machines, define `FRAME_POINTER_REGNUM' the number of
2052 a special, fixed register to be used internally until the offset is known,
2053 and define `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
2054 used for the frame pointer.
2056 You should define this macro only in the very rare circumstances when it is
2057 not possible to calculate the offset between the frame pointer and the
2058 automatic variables until after register allocation has been completed.
2059 When this macro is defined, you must also indicate in your definition of
2060 `ELIMINABLE_REGS' how to eliminate `FRAME_POINTER_REGNUM' into either
2061 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
2063 Do not define this macro if it would be the same as `FRAME_POINTER_REGNUM'. */
2064 /* #define HARD_FRAME_POINTER_REGNUM */
2066 /* The register number of the arg pointer register, which is used to access the
2067 function's argument list. On some machines, this is the same as the frame
2068 pointer register. On some machines, the hardware determines which register
2069 this is. On other machines, you can choose any register you wish for this
2070 purpose. If this is not the same register as the frame pointer register,
2071 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
2072 arrange to be able to eliminate it (*note Elimination::.). */
2073 /* #define ARG_POINTER_REGNUM */
2075 /* The register number of the return address pointer register, which is used to
2076 access the current function's return address from the stack. On some
2077 machines, the return address is not at a fixed offset from the frame pointer
2078 or stack pointer or argument pointer. This register can be defined to point
2079 to the return address on the stack, and then be converted by
2080 `ELIMINABLE_REGS' into either the frame pointer or stack pointer.
2082 Do not define this macro unless there is no other way to get the return
2083 address from the stack. */
2084 /* #define RETURN_ADDRESS_POINTER_REGNUM */
2086 /* Register numbers used for passing a function's static chain pointer. If
2087 register windows are used, the register number as seen by the called
2088 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
2089 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
2090 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
2092 The static chain register need not be a fixed register.
2094 If the static chain is passed in memory, these macros should not be defined;
2095 instead, the next two macros should be defined. */
2097 #define STATIC_CHAIN_REGNUM (GPR_FIRST + 18)
2098 /* #define STATIC_CHAIN_INCOMING_REGNUM */
2100 /* If the static chain is passed in memory, these macros provide rtx giving
2101 `mem' expressions that denote where they are stored. `STATIC_CHAIN' and
2102 `STATIC_CHAIN_INCOMING' give the locations as seen by the calling and called
2103 functions, respectively. Often the former will be at an offset from the
2104 stack pointer and the latter at an offset from the frame pointer.
2106 The variables `stack_pointer_rtx', `frame_pointer_rtx', and
2107 `arg_pointer_rtx' will have been initialized prior to the use of these
2108 macros and should be used to refer to those items.
2110 If the static chain is passed in a register, the two previous
2111 macros should be defined instead. */
2112 /* #define STATIC_CHAIN */
2113 /* #define STATIC_CHAIN_INCOMING */
2116 /* Eliminating the Frame Pointer and the Arg Pointer */
2118 /* A C expression which is nonzero if a function must have and use a frame
2119 pointer. This expression is evaluated in the reload pass. If its value is
2120 nonzero the function will have a frame pointer.
2122 The expression can in principle examine the current function and decide
2123 according to the facts, but on most machines the constant 0 or the constant
2124 1 suffices. Use 0 when the machine allows code to be generated with no
2125 frame pointer, and doing so saves some time or space. Use 1 when there is
2126 no possible advantage to avoiding a frame pointer.
2128 In certain cases, the compiler does not know how to produce valid code
2129 without a frame pointer. The compiler recognizes those cases and
2130 automatically gives the function a frame pointer regardless of what
2131 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them.
2133 In a function that does not require a frame pointer, the frame pointer
2134 register can be allocated for ordinary usage, unless you mark it as a fixed
2135 register. See `FIXED_REGISTERS' for more information. */
2136 #define FRAME_POINTER_REQUIRED 0
2138 /* A C statement to store in the variable DEPTH-VAR the difference between the
2139 frame pointer and the stack pointer values immediately after the function
2140 prologue. The value would be computed from information such as the result
2141 of `get_frame_size ()' and the tables of registers `regs_ever_live' and
2144 If `ELIMINABLE_REGS' is defined, this macro will be not be used and need not
2145 be defined. Otherwise, it must be defined even if `FRAME_POINTER_REQUIRED'
2146 is defined to always be true; in that case, you may set DEPTH-VAR to
2148 /* #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) */
2150 /* If defined, this macro specifies a table of register pairs used to eliminate
2151 unneeded registers that point into the stack frame. If it is not defined,
2152 the only elimination attempted by the compiler is to replace references to
2153 the frame pointer with references to the stack pointer.
2155 The definition of this macro is a list of structure initializations, each of
2156 which specifies an original and replacement register.
2158 On some machines, the position of the argument pointer is not known until
2159 the compilation is completed. In such a case, a separate hard register must
2160 be used for the argument pointer. This register can be eliminated by
2161 replacing it with either the frame pointer or the argument pointer,
2162 depending on whether or not the frame pointer has been eliminated.
2164 In this case, you might specify:
2165 #define ELIMINABLE_REGS \
2166 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2167 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
2168 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
2170 Note that the elimination of the argument pointer with the stack pointer is
2171 specified first since that is the preferred elimination. */
2172 #define ELIMINABLE_REGS \
2174 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
2175 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }, \
2176 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM } \
2179 /* A C expression that returns non-zero if the compiler is allowed to try to
2180 replace register number FROM-REG with register number TO-REG. This macro
2181 need only be defined if `ELIMINABLE_REGS' is defined, and will usually be
2182 the constant 1, since most of the cases preventing register elimination are
2183 things that the compiler already knows about. */
2185 #define CAN_ELIMINATE(FROM, TO) \
2186 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
2187 ? ! frame_pointer_needed \
2190 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the
2191 initial difference between the specified pair of registers. This macro must
2192 be defined if `ELIMINABLE_REGS' is defined. */
2194 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
2196 d30v_stack_t *info = d30v_stack_info (); \
2198 if ((FROM) == FRAME_POINTER_REGNUM) \
2200 else if ((FROM) == ARG_POINTER_REGNUM) \
2201 (OFFSET) = info->total_size - current_function_pretend_args_size; \
2206 /* Define this macro if the `longjmp' function restores registers from the
2207 stack frames, rather than from those saved specifically by `setjmp'.
2208 Certain quantities must not be kept in registers across a call to `setjmp'
2209 on such machines. */
2210 /* #define LONGJMP_RESTORE_FROM_STACK */
2213 /* Passing Function Arguments on the Stack */
2215 /* Define this macro if an argument declared in a prototype as an integral type
2216 smaller than `int' should actually be passed as an `int'. In addition to
2217 avoiding errors in certain cases of mismatch, it also makes for better code
2218 on certain machines. */
2219 /* #define PROMOTE_PROTOTYPES */
2221 /* A C expression that is the number of bytes actually pushed onto the stack
2222 when an instruction attempts to push NPUSHED bytes.
2224 If the target machine does not have a push instruction, do not define this
2225 macro. That directs GNU CC to use an alternate strategy: to allocate the
2226 entire argument block and then store the arguments into it.
2228 On some machines, the definition
2230 #define PUSH_ROUNDING(BYTES) (BYTES)
2232 will suffice. But on other machines, instructions that appear to push one
2233 byte actually push two bytes in an attempt to maintain alignment. Then the
2234 definition should be
2236 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
2237 /* #define PUSH_ROUNDING(NPUSHED) */
2239 /* If defined, the maximum amount of space required for outgoing arguments will
2240 be computed and placed into the variable
2241 `current_function_outgoing_args_size'. No space will be pushed onto the
2242 stack for each call; instead, the function prologue should increase the
2243 stack frame size by this amount.
2245 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
2247 #define ACCUMULATE_OUTGOING_ARGS 1
2249 /* Define this macro if functions should assume that stack space has been
2250 allocated for arguments even when their values are passed in registers.
2252 The value of this macro is the size, in bytes, of the area reserved for
2253 arguments passed in registers for the function represented by FNDECL.
2255 This space can be allocated by the caller, or be a part of the
2256 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says
2258 /* #define REG_PARM_STACK_SPACE(FNDECL) */
2260 /* Define these macros in addition to the one above if functions might allocate
2261 stack space for arguments even when their values are passed in registers.
2262 These should be used when the stack space allocated for arguments in
2263 registers is not a simple constant independent of the function declaration.
2265 The value of the first macro is the size, in bytes, of the area that we
2266 should initially assume would be reserved for arguments passed in registers.
2268 The value of the second macro is the actual size, in bytes, of the area that
2269 will be reserved for arguments passed in registers. This takes two
2270 arguments: an integer representing the number of bytes of fixed sized
2271 arguments on the stack, and a tree representing the number of bytes of
2272 variable sized arguments on the stack.
2274 When these macros are defined, `REG_PARM_STACK_SPACE' will only be called
2275 for libcall functions, the current function, or for a function being called
2276 when it is known that such stack space must be allocated. In each case this
2277 value can be easily computed.
2279 When deciding whether a called function needs such stack space, and how much
2280 space to reserve, GNU CC uses these two macros instead of
2281 `REG_PARM_STACK_SPACE'. */
2282 /* #define MAYBE_REG_PARM_STACK_SPACE */
2283 /* #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE) */
2285 /* Define this if it is the responsibility of the caller to allocate the area
2286 reserved for arguments passed in registers.
2288 If `ACCUMULATE_OUTGOING_ARGS' is defined, this macro controls whether the
2289 space for these arguments counts in the value of
2290 `current_function_outgoing_args_size'. */
2291 /* #define OUTGOING_REG_PARM_STACK_SPACE */
2293 /* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the stack
2294 parameters don't skip the area specified by it.
2296 Normally, when a parameter is not passed in registers, it is placed on the
2297 stack beyond the `REG_PARM_STACK_SPACE' area. Defining this macro
2298 suppresses this behavior and causes the parameter to be passed on the stack
2299 in its natural location. */
2300 /* #define STACK_PARMS_IN_REG_PARM_AREA */
2302 /* A C expression that should indicate the number of bytes of its own arguments
2303 that a function pops on returning, or 0 if the function pops no arguments
2304 and the caller must therefore pop them all after the function returns.
2306 FUNDECL is a C variable whose value is a tree node that describes the
2307 function in question. Normally it is a node of type `FUNCTION_DECL' that
2308 describes the declaration of the function. From this it is possible to
2309 obtain the DECL_MACHINE_ATTRIBUTES of the function.
2311 FUNTYPE is a C variable whose value is a tree node that describes the
2312 function in question. Normally it is a node of type `FUNCTION_TYPE' that
2313 describes the data type of the function. From this it is possible to obtain
2314 the data types of the value and arguments (if known).
2316 When a call to a library function is being considered, FUNTYPE will contain
2317 an identifier node for the library function. Thus, if you need to
2318 distinguish among various library functions, you can do so by their names.
2319 Note that "library function" in this context means a function used to
2320 perform arithmetic, whose name is known specially in the compiler and was
2321 not mentioned in the C code being compiled.
2323 STACK-SIZE is the number of bytes of arguments passed on the stack. If a
2324 variable number of bytes is passed, it is zero, and argument popping will
2325 always be the responsibility of the calling function.
2327 On the Vax, all functions always pop their arguments, so the definition of
2328 this macro is STACK-SIZE. On the 68000, using the standard calling
2329 convention, no functions pop their arguments, so the value of the macro is
2330 always 0 in this case. But an alternative calling convention is available
2331 in which functions that take a fixed number of arguments pop them but other
2332 functions (such as `printf') pop nothing (the caller pops all). When this
2333 convention is in use, FUNTYPE is examined to determine whether a function
2334 takes a fixed number of arguments. */
2335 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
2338 /* Function Arguments in Registers */
2340 /* A C expression that controls whether a function argument is passed in a
2341 register, and which register.
2343 The arguments are CUM, which summarizes all the previous arguments; MODE,
2344 the machine mode of the argument; TYPE, the data type of the argument as a
2345 tree node or 0 if that is not known (which happens for C support library
2346 functions); and NAMED, which is 1 for an ordinary argument and 0 for
2347 nameless arguments that correspond to `...' in the called function's
2350 The value of the expression should either be a `reg' RTX for the hard
2351 register in which to pass the argument, or zero to pass the argument on the
2354 For machines like the Vax and 68000, where normally all arguments are
2355 pushed, zero suffices as a definition.
2357 The usual way to make the ANSI library `stdarg.h' work on a machine where
2358 some arguments are usually passed in registers, is to cause nameless
2359 arguments to be passed on the stack instead. This is done by making
2360 `FUNCTION_ARG' return 0 whenever NAMED is 0.
2362 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of
2363 this macro to determine if this argument is of a type that must be passed in
2364 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG'
2365 returns non-zero for such an argument, the compiler will abort. If
2366 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the
2367 stack and then loaded into a register. */
2369 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
2370 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, FALSE)
2372 /* Define this macro if the target machine has "register windows", so that the
2373 register in which a function sees an arguments is not necessarily the same
2374 as the one in which the caller passed the argument.
2376 For such machines, `FUNCTION_ARG' computes the register in which the caller
2377 passes the value, and `FUNCTION_INCOMING_ARG' should be defined in a similar
2378 fashion to tell the function being called where the arguments will arrive.
2380 If `FUNCTION_INCOMING_ARG' is not defined, `FUNCTION_ARG' serves both
2383 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
2384 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, TRUE)
2386 /* A C expression for the number of words, at the beginning of an argument,
2387 must be put in registers. The value must be zero for arguments that are
2388 passed entirely in registers or that are entirely pushed on the stack.
2390 On some machines, certain arguments must be passed partially in registers
2391 and partially in memory. On these machines, typically the first N words of
2392 arguments are passed in registers, and the rest on the stack. If a
2393 multi-word argument (a `double' or a structure) crosses that boundary, its
2394 first few words must be passed in registers and the rest must be pushed.
2395 This macro tells the compiler when this occurs, and how many of the words
2396 should go in registers.
2398 `FUNCTION_ARG' for these arguments should return the first register to be
2399 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for
2400 the called function. */
2401 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
2402 d30v_function_arg_partial_nregs (&CUM, (int)MODE, TYPE, NAMED)
2404 /* A C expression that indicates when an argument must be passed by reference.
2405 If nonzero for an argument, a copy of that argument is made in memory and a
2406 pointer to the argument is passed instead of the argument itself. The
2407 pointer is passed in whatever way is appropriate for passing a pointer to
2410 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable
2411 definition of this macro might be
2412 #define FUNCTION_ARG_PASS_BY_REFERENCE\
2413 (CUM, MODE, TYPE, NAMED) \
2414 MUST_PASS_IN_STACK (MODE, TYPE) */
2415 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0
2417 /* If defined, a C expression that indicates when it is the called function's
2418 responsibility to make a copy of arguments passed by invisible reference.
2419 Normally, the caller makes a copy and passes the address of the copy to the
2420 routine being called. When FUNCTION_ARG_CALLEE_COPIES is defined and is
2421 nonzero, the caller does not make a copy. Instead, it passes a pointer to
2422 the "live" value. The called function must not modify this value. If it
2423 can be determined that the value won't be modified, it need not make a copy;
2424 otherwise a copy must be made. */
2425 /* #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) */
2427 /* A C type for declaring a variable that is used as the first argument of
2428 `FUNCTION_ARG' and other related values. For some target machines, the type
2429 `int' suffices and can hold the number of bytes of argument so far.
2431 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
2432 that have been passed on the stack. The compiler has other variables to
2433 keep track of that. For target machines on which all arguments are passed
2434 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
2435 however, the data structure must exist and should not be empty, so use
2437 typedef int CUMULATIVE_ARGS
;
2439 /* A C statement (sans semicolon) for initializing the variable CUM for the
2440 state at the beginning of the argument list. The variable has type
2441 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
2442 of the function which will receive the args, or 0 if the args are to a
2443 compiler support library function. The value of INDIRECT is nonzero when
2444 processing an indirect call, for example a call through a function pointer.
2445 The value of INDIRECT is zero for a call to an explicitly named function, a
2446 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
2447 arguments for the function being compiled.
2449 When processing a call to a compiler support library function, LIBNAME
2450 identifies which one. It is a `symbol_ref' rtx which contains the name of
2451 the function, as a string. LIBNAME is 0 when an ordinary C function call is
2452 being processed. Thus, each time this macro is called, either LIBNAME or
2453 FNTYPE is nonzero, but never both of them at once. */
2455 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
2456 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, INDIRECT, FALSE)
2458 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the
2459 arguments for the function being compiled. If this macro is undefined,
2460 `INIT_CUMULATIVE_ARGS' is used instead.
2462 The value passed for LIBNAME is always 0, since library routines with
2463 special calling conventions are never compiled with GNU CC. The argument
2464 LIBNAME exists for symmetry with `INIT_CUMULATIVE_ARGS'. */
2466 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \
2467 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, FALSE, TRUE)
2469 /* A C statement (sans semicolon) to update the summarizer variable CUM to
2470 advance past an argument in the argument list. The values MODE, TYPE and
2471 NAMED describe that argument. Once this is done, the variable CUM is
2472 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
2474 This macro need not do anything if the argument in question was passed on
2475 the stack. The compiler knows how to track the amount of stack space used
2476 for arguments without any special help. */
2478 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
2479 d30v_function_arg_advance (&CUM, (int) MODE, TYPE, NAMED)
2481 /* If defined, a C expression which determines whether, and in which direction,
2482 to pad out an argument with extra space. The value should be of type `enum
2483 direction': either `upward' to pad above the argument, `downward' to pad
2484 below, or `none' to inhibit padding.
2486 The *amount* of padding is always just enough to reach the next multiple of
2487 `FUNCTION_ARG_BOUNDARY'; this macro does not control it.
2489 This macro has a default definition which is right for most systems. For
2490 little-endian machines, the default is to pad upward. For big-endian
2491 machines, the default is to pad downward for an argument of constant size
2492 shorter than an `int', and upward otherwise. */
2493 /* #define FUNCTION_ARG_PADDING(MODE, TYPE) */
2495 /* If defined, a C expression that gives the alignment boundary, in bits, of an
2496 argument with the specified mode and type. If it is not defined,
2497 `PARM_BOUNDARY' is used for all arguments. */
2499 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
2500 d30v_function_arg_boundary ((int) MODE, TYPE)
2502 /* A C expression that is nonzero if REGNO is the number of a hard register in
2503 which function arguments are sometimes passed. This does *not* include
2504 implicit arguments such as the static chain and the structure-value address.
2505 On many machines, no registers can be used for this purpose since all
2506 function arguments are pushed on the stack. */
2508 #define FUNCTION_ARG_REGNO_P(REGNO) \
2509 IN_RANGE_P (REGNO, GPR_ARG_FIRST, GPR_ARG_LAST)
2512 /* How Scalar Function Values are Returned */
2514 /* Define this macro if `-traditional' should not cause functions declared to
2515 return `float' to convert the value to `double'. */ /* #define
2516 TRADITIONAL_RETURN_FLOAT */
2518 /* A C expression to create an RTX representing the place where a function
2519 returns a value of data type VALTYPE. VALTYPE is a tree node representing a
2520 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to
2521 represent that type. On many machines, only the mode is relevant.
2522 (Actually, on most machines, scalar values are returned in the same place
2523 regardless of mode).
2525 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion
2526 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type.
2528 If the precise function being called is known, FUNC is a tree node
2529 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it
2530 possible to use a different value-returning convention for specific
2531 functions when all their calls are known.
2533 `FUNCTION_VALUE' is not used for return vales with aggregate data types,
2534 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and
2535 related macros, below. */
2537 #define FUNCTION_VALUE(VALTYPE, FUNC) \
2538 gen_rtx (REG, TYPE_MODE (VALTYPE), GPR_RET_VALUE)
2540 /* Define this macro if the target machine has "register windows" so that the
2541 register in which a function returns its value is not the same as the one in
2542 which the caller sees the value.
2544 For such machines, `FUNCTION_VALUE' computes the register in which the
2545 caller will see the value. `FUNCTION_OUTGOING_VALUE' should be defined in a
2546 similar fashion to tell the function where to put the value.
2548 If `FUNCTION_OUTGOING_VALUE' is not defined, `FUNCTION_VALUE' serves both
2551 `FUNCTION_OUTGOING_VALUE' is not used for return vales with aggregate data
2552 types, because these are returned in another way. See `STRUCT_VALUE_REGNUM'
2553 and related macros, below. */
2554 /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) */
2556 /* A C expression to create an RTX representing the place where a library
2557 function returns a value of mode MODE. If the precise function being called
2558 is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a
2559 null pointer. This makes it possible to use a different value-returning
2560 convention for specific functions when all their calls are known.
2562 Note that "library function" in this context means a compiler support
2563 routine, used to perform arithmetic, whose name is known specially by the
2564 compiler and was not mentioned in the C code being compiled.
2566 The definition of `LIBRARY_VALUE' need not be concerned aggregate data
2567 types, because none of the library functions returns such types. */
2569 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, GPR_RET_VALUE)
2571 /* A C expression that is nonzero if REGNO is the number of a hard register in
2572 which the values of called function may come back.
2574 A register whose use for returning values is limited to serving as the
2575 second of a pair (for a value of type `double', say) need not be recognized
2576 by this macro. So for most machines, this definition suffices:
2578 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
2580 If the machine has register windows, so that the caller and the called
2581 function use different registers for the return value, this macro should
2582 recognize only the caller's register numbers. */
2584 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == GPR_RET_VALUE)
2586 /* Define this macro if `untyped_call' and `untyped_return' need more space
2587 than is implied by `FUNCTION_VALUE_REGNO_P' for saving and restoring an
2588 arbitrary return value. */
2589 /* #define APPLY_RESULT_SIZE */
2592 /* How Large Values are Returned */
2594 /* A C expression which can inhibit the returning of certain function values in
2595 registers, based on the type of value. A nonzero value says to return the
2596 function value in memory, just as large structures are always returned.
2597 Here TYPE will be a C expression of type `tree', representing the data type
2600 Note that values of mode `BLKmode' must be explicitly handled by this macro.
2601 Also, the option `-fpcc-struct-return' takes effect regardless of this
2602 macro. On most systems, it is possible to leave the macro undefined; this
2603 causes a default definition to be used, whose value is the constant 1 for
2604 `BLKmode' values, and 0 otherwise.
2606 Do not use this macro to indicate that structures and unions should always
2607 be returned in memory. You should instead use `DEFAULT_PCC_STRUCT_RETURN'
2608 to indicate this. */
2609 /* #define RETURN_IN_MEMORY(TYPE) */
2611 /* Define this macro to be 1 if all structure and union return values must be
2612 in memory. Since this results in slower code, this should be defined only
2613 if needed for compatibility with other compilers or with an ABI. If you
2614 define this macro to be 0, then the conventions used for structure and union
2615 return values are decided by the `RETURN_IN_MEMORY' macro.
2617 If not defined, this defaults to the value 1. */
2618 /* #define DEFAULT_PCC_STRUCT_RETURN */
2620 /* If the structure value address is passed in a register, then
2621 `STRUCT_VALUE_REGNUM' should be the number of that register. */
2623 #define STRUCT_VALUE_REGNUM GPR_ARG_FIRST
2625 /* If the structure value address is not passed in a register, define
2626 `STRUCT_VALUE' as an expression returning an RTX for the place where the
2627 address is passed. If it returns 0, the address is passed as an "invisible"
2630 #define STRUCT_VALUE 0
2632 /* On some architectures the place where the structure value address is found
2633 by the called function is not the same place that the caller put it. This
2634 can be due to register windows, or it could be because the function prologue
2635 moves it to a different place.
2637 If the incoming location of the structure value address is in a register,
2638 define this macro as the register number. */
2639 /* #define STRUCT_VALUE_INCOMING_REGNUM */
2641 /* If the incoming location is not a register, then you should define
2642 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the called
2643 function should find the value. If it should find the value on the stack,
2644 define this to create a `mem' which refers to the frame pointer. A
2645 definition of 0 means that the address is passed as an "invisible" first
2647 /* #define STRUCT_VALUE_INCOMING */
2649 /* Define this macro if the usual system convention on the target machine for
2650 returning structures and unions is for the called function to return the
2651 address of a static variable containing the value.
2653 Do not define this if the usual system convention is for the caller to pass
2654 an address to the subroutine.
2656 This macro has effect in `-fpcc-struct-return' mode, but it does nothing
2657 when you use `-freg-struct-return' mode. */
2658 /* #define PCC_STATIC_STRUCT_RETURN */
2661 /* Caller-Saves Register Allocation */
2663 /* Define this macro if function calls on the target machine do not preserve
2664 any registers; in other words, if `CALL_USED_REGISTERS' has 1 for all
2665 registers. This macro enables `-fcaller-saves' by default. Eventually that
2666 option will be enabled by default on all machines and both the option and
2667 this macro will be eliminated. */
2668 /* #define DEFAULT_CALLER_SAVES */
2670 /* A C expression to determine whether it is worthwhile to consider placing a
2671 pseudo-register in a call-clobbered hard register and saving and restoring
2672 it around each function call. The expression should be 1 when this is worth
2673 doing, and 0 otherwise.
2675 If you don't define this macro, a default is used which is good on most
2676 machines: `4 * CALLS < REFS'. */
2677 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */
2680 /* Function Entry and Exit */
2682 /* A C compound statement that outputs the assembler code for entry to a
2683 function. The prologue is responsible for setting up the stack frame,
2684 initializing the frame pointer register, saving registers that must be
2685 saved, and allocating SIZE additional bytes of storage for the local
2686 variables. SIZE is an integer. FILE is a stdio stream to which the
2687 assembler code should be output.
2689 The label for the beginning of the function need not be output by this
2690 macro. That has already been done when the macro is run.
2692 To determine which registers to save, the macro can refer to the array
2693 `regs_ever_live': element R is nonzero if hard register R is used anywhere
2694 within the function. This implies the function prologue should save
2695 register R, provided it is not one of the call-used registers.
2696 (`FUNCTION_EPILOGUE' must likewise use `regs_ever_live'.)
2698 On machines that have "register windows", the function entry code does not
2699 save on the stack the registers that are in the windows, even if they are
2700 supposed to be preserved by function calls; instead it takes appropriate
2701 steps to "push" the register stack, if any non-call-used registers are used
2704 On machines where functions may or may not have frame-pointers, the function
2705 entry code must vary accordingly; it must set up the frame pointer if one is
2706 wanted, and not otherwise. To determine whether a frame pointer is in
2707 wanted, the macro can refer to the variable `frame_pointer_needed'. The
2708 variable's value will be 1 at run time in a function that needs a frame
2709 pointer. *Note Elimination::.
2711 The function entry code is responsible for allocating any stack space
2712 required for the function. This stack space consists of the regions listed
2713 below. In most cases, these regions are allocated in the order listed, with
2714 the last listed region closest to the top of the stack (the lowest address
2715 if `STACK_GROWS_DOWNWARD' is defined, and the highest address if it is not
2716 defined). You can use a different order for a machine if doing so is more
2717 convenient or required for compatibility reasons. Except in cases where
2718 required by standard or by a debugger, there is no reason why the stack
2719 layout used by GCC need agree with that used by other compilers for a
2722 * A region of `current_function_pretend_args_size' bytes of
2723 uninitialized space just underneath the first argument
2724 arriving on the stack. (This may not be at the very start of
2725 the allocated stack region if the calling sequence has pushed
2726 anything else since pushing the stack arguments. But
2727 usually, on such machines, nothing else has been pushed yet,
2728 because the function prologue itself does all the pushing.)
2729 This region is used on machines where an argument may be
2730 passed partly in registers and partly in memory, and, in some
2731 cases to support the features in `varargs.h' and `stdargs.h'.
2733 * An area of memory used to save certain registers used by the
2734 function. The size of this area, which may also include
2735 space for such things as the return address and pointers to
2736 previous stack frames, is machine-specific and usually
2737 depends on which registers have been used in the function.
2738 Machines with register windows often do not require a save
2741 * A region of at least SIZE bytes, possibly rounded up to an
2742 allocation boundary, to contain the local variables of the
2743 function. On some machines, this region and the save area
2744 may occur in the opposite order, with the save area closer to
2745 the top of the stack.
2747 * Optionally, when `ACCUMULATE_OUTGOING_ARGS' is defined, a
2748 region of `current_function_outgoing_args_size' bytes to be
2749 used for outgoing argument lists of the function. *Note
2752 Normally, it is necessary for the macros `FUNCTION_PROLOGUE' and
2753 `FUNCTION_EPILOGUE' to treat leaf functions specially. The C variable
2754 `leaf_function' is nonzero for such a function. */
2756 #define FUNCTION_PROLOGUE(FILE, SIZE) d30v_function_prologue (FILE, SIZE)
2758 /* Define this macro as a C expression that is nonzero if the return
2759 instruction or the function epilogue ignores the value of the stack pointer;
2760 in other words, if it is safe to delete an instruction to adjust the stack
2761 pointer before a return from the function.
2763 Note that this macro's value is relevant only for functions for which frame
2764 pointers are maintained. It is never safe to delete a final stack
2765 adjustment in a function that has no frame pointer, and the compiler knows
2766 this regardless of `EXIT_IGNORE_STACK'. */
2767 /* #define EXIT_IGNORE_STACK */
2769 /* Define this macro as a C expression that is nonzero for registers
2770 are used by the epilogue or the `return' pattern. The stack and
2771 frame pointer registers are already be assumed to be used as
2773 #define EPILOGUE_USES(REGNO) ((REGNO) == GPR_LINK)
2775 /* A C compound statement that outputs the assembler code for exit from a
2776 function. The epilogue is responsible for restoring the saved registers and
2777 stack pointer to their values when the function was called, and returning
2778 control to the caller. This macro takes the same arguments as the macro
2779 `FUNCTION_PROLOGUE', and the registers to restore are determined from
2780 `regs_ever_live' and `CALL_USED_REGISTERS' in the same way.
2782 On some machines, there is a single instruction that does all the work of
2783 returning from the function. On these machines, give that instruction the
2784 name `return' and do not define the macro `FUNCTION_EPILOGUE' at all.
2786 Do not define a pattern named `return' if you want the `FUNCTION_EPILOGUE'
2787 to be used. If you want the target switches to control whether return
2788 instructions or epilogues are used, define a `return' pattern with a
2789 validity condition that tests the target switches appropriately. If the
2790 `return' pattern's validity condition is false, epilogues will be used.
2792 On machines where functions may or may not have frame-pointers, the function
2793 exit code must vary accordingly. Sometimes the code for these two cases is
2794 completely different. To determine whether a frame pointer is wanted, the
2795 macro can refer to the variable `frame_pointer_needed'. The variable's
2796 value will be 1 when compiling a function that needs a frame pointer.
2798 Normally, `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE' must treat leaf
2799 functions specially. The C variable `leaf_function' is nonzero for such a
2800 function. *Note Leaf Functions::.
2802 On some machines, some functions pop their arguments on exit while others
2803 leave that for the caller to do. For example, the 68020 when given `-mrtd'
2804 pops arguments in functions that take a fixed number of arguments.
2806 Your definition of the macro `RETURN_POPS_ARGS' decides which functions pop
2807 their own arguments. `FUNCTION_EPILOGUE' needs to know what was decided.
2808 The variable that is called `current_function_pops_args' is the number of
2809 bytes of its arguments that a function should pop. *Note Scalar Return::. */
2811 #define FUNCTION_EPILOGUE(FILE, SIZE) d30v_function_epilogue (FILE, SIZE)
2813 /* Define this macro if the function epilogue contains delay slots to which
2814 instructions from the rest of the function can be "moved". The definition
2815 should be a C expression whose value is an integer representing the number
2816 of delay slots there. */
2817 /* #define DELAY_SLOTS_FOR_EPILOGUE */
2819 /* A C expression that returns 1 if INSN can be placed in delay slot number N
2822 The argument N is an integer which identifies the delay slot now being
2823 considered (since different slots may have different rules of eligibility).
2824 It is never negative and is always less than the number of epilogue delay
2825 slots (what `DELAY_SLOTS_FOR_EPILOGUE' returns). If you reject a particular
2826 insn for a given delay slot, in principle, it may be reconsidered for a
2827 subsequent delay slot. Also, other insns may (at least in principle) be
2828 considered for the so far unfilled delay slot.
2830 The insns accepted to fill the epilogue delay slots are put in an
2831 RTL list made with `insn_list' objects, stored in the variable
2832 `current_function_epilogue_delay_list'. The insn for the first
2833 delay slot comes first in the list. Your definition of the macro
2834 `FUNCTION_EPILOGUE' should fill the delay slots by outputting the
2835 insns in this list, usually by calling `final_scan_insn'.
2837 You need not define this macro if you did not define
2838 `DELAY_SLOTS_FOR_EPILOGUE'. */
2839 /* #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) */
2841 /* A C compound statement that outputs the assembler code for a thunk function,
2842 used to implement C++ virtual function calls with multiple inheritance. The
2843 thunk acts as a wrapper around a virtual function, adjusting the implicit
2844 object parameter before handing control off to the real function.
2846 First, emit code to add the integer DELTA to the location that contains the
2847 incoming first argument. Assume that this argument contains a pointer, and
2848 is the one used to pass the `this' pointer in C++. This is the incoming
2849 argument *before* the function prologue, e.g. `%o0' on a sparc. The
2850 addition must preserve the values of all other incoming arguments.
2852 After the addition, emit code to jump to FUNCTION, which is a
2853 `FUNCTION_DECL'. This is a direct pure jump, not a call, and does not touch
2854 the return address. Hence returning from FUNCTION will return to whoever
2855 called the current `thunk'.
2857 The effect must be as if FUNCTION had been called directly with the adjusted
2858 first argument. This macro is responsible for emitting all of the code for
2859 a thunk function; `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE' are not
2862 The THUNK_FNDECL is redundant. (DELTA and FUNCTION have already been
2863 extracted from it.) It might possibly be useful on some targets, but
2866 If you do not define this macro, the target-independent code in the C++
2867 frontend will generate a less efficient heavyweight thunk that calls
2868 FUNCTION instead of jumping to it. The generic approach does not support
2870 /* #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) */
2873 /* Generating Code for Profiling. */
2875 /* A C statement or compound statement to output to FILE some assembler code to
2876 call the profiling subroutine `mcount'. Before calling, the assembler code
2877 must load the address of a counter variable into a register where `mcount'
2878 expects to find the address. The name of this variable is `LP' followed by
2879 the number LABELNO, so you would generate the name using `LP%d' in a
2882 The details of how the address should be passed to `mcount' are determined
2883 by your operating system environment, not by GNU CC. To figure them out,
2884 compile a small program for profiling using the system's installed C
2885 compiler and look at the assembler code that results. */
2887 #define FUNCTION_PROFILER(FILE, LABELNO) d30v_function_profiler (FILE, LABELNO)
2889 /* Define this macro if the code for function profiling should come before the
2890 function prologue. Normally, the profiling code comes after. */
2891 /* #define PROFILE_BEFORE_PROLOGUE */
2893 /* A C statement or compound statement to output to FILE some assembler code to
2894 initialize basic-block profiling for the current object module. The global
2895 compile flag `profile_block_flag' distingishes two profile modes.
2897 profile_block_flag != 2'
2898 Output code to call the subroutine `__bb_init_func' once per
2899 object module, passing it as its sole argument the address of
2900 a block allocated in the object module.
2902 The name of the block is a local symbol made with this
2905 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2907 Of course, since you are writing the definition of
2908 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2909 you can take a short cut in the definition of this macro and
2910 use the name that you know will result.
2912 The first word of this block is a flag which will be nonzero
2913 if the object module has already been initialized. So test
2914 this word first, and do not call `__bb_init_func' if the flag
2915 is nonzero. BLOCK_OR_LABEL contains a unique number which
2916 may be used to generate a label as a branch destination when
2917 `__bb_init_func' will not be called.
2919 Described in assembler language, the code to be output looks
2928 profile_block_flag == 2'
2929 Output code to call the subroutine `__bb_init_trace_func' and
2930 pass two parameters to it. The first parameter is the same as
2931 for `__bb_init_func'. The second parameter is the number of
2932 the first basic block of the function as given by
2933 BLOCK_OR_LABEL. Note that `__bb_init_trace_func' has to be
2934 called, even if the object module has been initialized
2937 Described in assembler language, the code to be output looks
2940 parameter2 <- BLOCK_OR_LABEL
2941 call __bb_init_trace_func */
2942 /* #define FUNCTION_BLOCK_PROFILER (FILE, LABELNO) */
2944 /* A C statement or compound statement to output to FILE some assembler code to
2945 increment the count associated with the basic block number BLOCKNO. The
2946 global compile flag `profile_block_flag' distingishes two profile modes.
2948 profile_block_flag != 2'
2949 Output code to increment the counter directly. Basic blocks
2950 are numbered separately from zero within each compilation.
2951 The count associated with block number BLOCKNO is at index
2952 BLOCKNO in a vector of words; the name of this array is a
2953 local symbol made with this statement:
2955 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 2);
2957 Of course, since you are writing the definition of
2958 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2959 you can take a short cut in the definition of this macro and
2960 use the name that you know will result.
2962 Described in assembler language, the code to be output looks
2965 inc (LPBX2+4*BLOCKNO)
2967 profile_block_flag == 2'
2968 Output code to initialize the global structure `__bb' and
2969 call the function `__bb_trace_func', which will increment the
2972 `__bb' consists of two words. In the first word, the current
2973 basic block number, as given by BLOCKNO, has to be stored. In
2974 the second word, the address of a block allocated in the
2975 object module has to be stored. The address is given by the
2976 label created with this statement:
2978 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2980 Described in assembler language, the code to be output looks
2982 move BLOCKNO -> (__bb)
2983 move LPBX0 -> (__bb+4)
2984 call __bb_trace_func */
2985 /* #define BLOCK_PROFILER(FILE, BLOCKNO) */
2987 /* A C statement or compound statement to output to FILE assembler
2988 code to call function `__bb_trace_ret'. The assembler code should
2989 only be output if the global compile flag `profile_block_flag' ==
2990 2. This macro has to be used at every place where code for
2991 returning from a function is generated (e.g. `FUNCTION_EPILOGUE').
2992 Although you have to write the definition of `FUNCTION_EPILOGUE'
2993 as well, you have to define this macro to tell the compiler, that
2994 the proper call to `__bb_trace_ret' is produced. */
2995 /* #define FUNCTION_BLOCK_PROFILER_EXIT(FILE) */
2997 /* A C statement or compound statement to save all registers, which may be
2998 clobbered by a function call, including condition codes. The `asm'
2999 statement will be mostly likely needed to handle this task. Local labels in
3000 the assembler code can be concatenated with the string ID, to obtain a
3003 Registers or condition codes clobbered by `FUNCTION_PROLOGUE' or
3004 `FUNCTION_EPILOGUE' must be saved in the macros `FUNCTION_BLOCK_PROFILER',
3005 `FUNCTION_BLOCK_PROFILER_EXIT' and `BLOCK_PROFILER' prior calling
3006 `__bb_init_trace_func', `__bb_trace_ret' and `__bb_trace_func' respectively. */
3007 /* #define MACHINE_STATE_SAVE(ID) */
3009 /* A C statement or compound statement to restore all registers, including
3010 condition codes, saved by `MACHINE_STATE_SAVE'.
3012 Registers or condition codes clobbered by `FUNCTION_PROLOGUE' or
3013 `FUNCTION_EPILOGUE' must be restored in the macros
3014 `FUNCTION_BLOCK_PROFILER', `FUNCTION_BLOCK_PROFILER_EXIT' and
3015 `BLOCK_PROFILER' after calling `__bb_init_trace_func', `__bb_trace_ret' and
3016 `__bb_trace_func' respectively. */
3017 /* #define MACHINE_STATE_RESTORE(ID) */
3019 /* A C function or functions which are needed in the library to support block
3021 /* #define BLOCK_PROFILER_CODE */
3024 /* Implementing the Varargs Macros. */
3026 /* If defined, is a C expression that produces the machine-specific code for a
3027 call to `__builtin_saveregs'. This code will be moved to the very beginning
3028 of the function, before any parameter access are made. The return value of
3029 this function should be an RTX that contains the value to use as the return
3030 of `__builtin_saveregs'.
3032 If this macro is not defined, the compiler will output an ordinary call to
3033 the library function `__builtin_saveregs'. */
3035 #define EXPAND_BUILTIN_SAVEREGS() d30v_expand_builtin_saveregs ()
3037 /* This macro offers an alternative to using `__builtin_saveregs' and defining
3038 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
3039 arguments into the stack so that all the arguments appear to have been
3040 passed consecutively on the stack. Once this is done, you can use the
3041 standard implementation of varargs that works for machines that pass all
3042 their arguments on the stack.
3044 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing
3045 the values that obtain after processing of the named arguments. The
3046 arguments MODE and TYPE describe the last named argument--its machine mode
3047 and its data type as a tree node.
3049 The macro implementation should do two things: first, push onto the stack
3050 all the argument registers *not* used for the named arguments, and second,
3051 store the size of the data thus pushed into the `int'-valued variable whose
3052 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you
3053 store here will serve as additional offset for setting up the stack frame.
3055 Because you must generate code to push the anonymous arguments at compile
3056 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only
3057 useful on machines that have just a single category of argument register and
3058 use it uniformly for all data types.
3060 If the argument SECOND_TIME is nonzero, it means that the arguments of the
3061 function are being analyzed for the second time. This happens for an inline
3062 function, which is not actually compiled until the end of the source file.
3063 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in
3066 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
3067 d30v_setup_incoming_varargs (&ARGS_SO_FAR, (int) MODE, TYPE, \
3068 &PRETEND_ARGS_SIZE, SECOND_TIME)
3070 /* Define this macro if the location where a function argument is passed
3071 depends on whether or not it is a named argument.
3073 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for
3074 varargs and stdarg functions. With this macro defined, the NAMED argument
3075 is always true for named arguments, and false for unnamed arguments. If
3076 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all
3077 arguments are treated as named. Otherwise, all named arguments except the
3078 last are treated as named. */
3079 /* #define STRICT_ARGUMENT_NAMING */
3081 /* Build up the stdarg/varargs va_list type tree, assinging it to NODE. If not
3082 defined, it is assumed that va_list is a void * pointer. */
3084 #define BUILD_VA_LIST_TYPE(VALIST) \
3085 (VALIST) = d30v_build_va_list ()
3088 /* Implement the stdarg/varargs va_start macro. STDARG_P is non-zero if this
3089 is stdarg.h instead of varargs.h. VALIST is the tree of the va_list
3090 variable to initialize. NEXTARG is the machine independent notion of the
3091 'next' argument after the variable arguments. If not defined, a standard
3092 implementation will be defined that works for arguments passed on the stack. */
3094 #define EXPAND_BUILTIN_VA_START(STDARG_P, VALIST, NEXTARG) \
3095 (d30v_expand_builtin_va_start(STDARG_P, VALIST, NEXTARG))
3097 /* Implement the stdarg/varargs va_arg macro. VALIST is the variable of type
3098 va_list as a tree, TYPE is the type passed to va_arg. */
3100 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
3101 (d30v_expand_builtin_va_arg (VALIST, TYPE))
3103 /* Implement the stdarg/varargs va_end macro.
3104 VALIST is the variable of type va_list as a tree. */
3106 /* #define EXPAND_BUILTIN_VA_END(VALIST) */
3110 /* Trampolines for Nested Functions. */
3112 /* A C statement to output, on the stream FILE, assembler code for a block of
3113 data that contains the constant parts of a trampoline. This code should not
3114 include a label--the label is taken care of automatically. */
3115 /* #define TRAMPOLINE_TEMPLATE(FILE) d30v_trampoline_template (FILE) */
3117 /* The name of a subroutine to switch to the section in which the trampoline
3118 template is to be placed (*note Sections::.). The default is a value of
3119 `readonly_data_section', which places the trampoline in the section
3120 containing read-only data. */
3121 /* #define TRAMPOLINE_SECTION */
3123 /* A C expression for the size in bytes of the trampoline, as an integer. */
3124 #define TRAMPOLINE_SIZE (d30v_trampoline_size ())
3126 /* Alignment required for trampolines, in bits.
3128 If you don't define this macro, the value of `BIGGEST_ALIGNMENT' is used for
3129 aligning trampolines. */
3130 #define TRAMPOLINE_ALIGNMENT 64
3132 /* A C statement to initialize the variable parts of a trampoline. ADDR is an
3133 RTX for the address of the trampoline; FNADDR is an RTX for the address of
3134 the nested function; STATIC_CHAIN is an RTX for the static chain value that
3135 should be passed to the function when it is called. */
3136 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
3137 d30v_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
3139 /* A C expression to allocate run-time space for a trampoline. The expression
3140 value should be an RTX representing a memory reference to the space for the
3143 If this macro is not defined, by default the trampoline is allocated as a
3144 stack slot. This default is right for most machines. The exceptions are
3145 machines where it is impossible to execute instructions in the stack area.
3146 On such machines, you may have to implement a separate stack, using this
3147 macro in conjunction with `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE'.
3149 FP points to a data structure, a `struct function', which describes the
3150 compilation status of the immediate containing function of the function
3151 which the trampoline is for. Normally (when `ALLOCATE_TRAMPOLINE' is not
3152 defined), the stack slot for the trampoline is in the stack frame of this
3153 containing function. Other allocation strategies probably must do something
3154 analogous with this information. */
3155 /* #define ALLOCATE_TRAMPOLINE(FP) */
3157 /* Implementing trampolines is difficult on many machines because they have
3158 separate instruction and data caches. Writing into a stack location fails
3159 to clear the memory in the instruction cache, so when the program jumps to
3160 that location, it executes the old contents.
3162 Here are two possible solutions. One is to clear the relevant parts of the
3163 instruction cache whenever a trampoline is set up. The other is to make all
3164 trampolines identical, by having them jump to a standard subroutine. The
3165 former technique makes trampoline execution faster; the latter makes
3166 initialization faster.
3168 To clear the instruction cache when a trampoline is initialized, define the
3169 following macros which describe the shape of the cache. */
3171 /* The total size in bytes of the cache. */
3172 /* #define INSN_CACHE_SIZE */
3174 /* The length in bytes of each cache line. The cache is divided into cache
3175 lines which are disjoint slots, each holding a contiguous chunk of data
3176 fetched from memory. Each time data is brought into the cache, an entire
3177 line is read at once. The data loaded into a cache line is always aligned
3178 on a boundary equal to the line size. */
3179 /* #define INSN_CACHE_LINE_WIDTH */
3181 /* The number of alternative cache lines that can hold any particular memory
3183 /* #define INSN_CACHE_DEPTH */
3185 /* Alternatively, if the machine has system calls or instructions to clear the
3186 instruction cache directly, you can define the following macro. */
3188 /* If defined, expands to a C expression clearing the *instruction cache* in
3189 the specified interval. If it is not defined, and the macro INSN_CACHE_SIZE
3190 is defined, some generic code is generated to clear the cache. The
3191 definition of this macro would typically be a series of `asm' statements.
3192 Both BEG and END are both pointer expressions. */
3193 /* #define CLEAR_INSN_CACHE (BEG, END) */
3195 /* To use a standard subroutine, define the following macro. In addition, you
3196 must make sure that the instructions in a trampoline fill an entire cache
3197 line with identical instructions, or else ensure that the beginning of the
3198 trampoline code is always aligned at the same point in its cache line. Look
3199 in `m68k.h' as a guide. */
3201 /* Define this macro if trampolines need a special subroutine to do their work.
3202 The macro should expand to a series of `asm' statements which will be
3203 compiled with GNU CC. They go in a library function named
3204 `__transfer_from_trampoline'.
3206 If you need to avoid executing the ordinary prologue code of a compiled C
3207 function when you jump to the subroutine, you can do so by placing a special
3208 label of your own in the assembler code. Use one `asm' statement to
3209 generate an assembler label, and another to make the label global. Then
3210 trampolines can use that label to jump directly to your special assembler
3212 /* #define TRANSFER_FROM_TRAMPOLINE */
3215 /* Implicit Calls to Library Routines */
3217 /* A C string constant giving the name of the function to call for
3218 multiplication of one signed full-word by another. If you do not define
3219 this macro, the default name is used, which is `__mulsi3', a function
3220 defined in `libgcc.a'. */
3221 /* #define MULSI3_LIBCALL */
3223 /* A C string constant giving the name of the function to call for division of
3224 one signed full-word by another. If you do not define this macro, the
3225 default name is used, which is `__divsi3', a function defined in `libgcc.a'. */
3226 /* #define DIVSI3_LIBCALL */
3228 /* A C string constant giving the name of the function to call for division of
3229 one unsigned full-word by another. If you do not define this macro, the
3230 default name is used, which is `__udivsi3', a function defined in
3232 /* #define UDIVSI3_LIBCALL */
3234 /* A C string constant giving the name of the function to call for the
3235 remainder in division of one signed full-word by another. If you do not
3236 define this macro, the default name is used, which is `__modsi3', a function
3237 defined in `libgcc.a'. */
3238 /* #define MODSI3_LIBCALL */
3240 /* A C string constant giving the name of the function to call for the
3241 remainder in division of one unsigned full-word by another. If you do not
3242 define this macro, the default name is used, which is `__umodsi3', a
3243 function defined in `libgcc.a'. */
3244 /* #define UMODSI3_LIBCALL */
3246 /* A C string constant giving the name of the function to call for
3247 multiplication of one signed double-word by another. If you do not define
3248 this macro, the default name is used, which is `__muldi3', a function
3249 defined in `libgcc.a'. */
3250 /* #define MULDI3_LIBCALL */
3252 /* A C string constant giving the name of the function to call for division of
3253 one signed double-word by another. If you do not define this macro, the
3254 default name is used, which is `__divdi3', a function defined in `libgcc.a'. */
3255 /* #define DIVDI3_LIBCALL */
3257 /* A C string constant giving the name of the function to call for division of
3258 one unsigned full-word by another. If you do not define this macro, the
3259 default name is used, which is `__udivdi3', a function defined in
3261 /* #define UDIVDI3_LIBCALL */
3263 /* A C string constant giving the name of the function to call for the
3264 remainder in division of one signed double-word by another. If you do not
3265 define this macro, the default name is used, which is `__moddi3', a function
3266 defined in `libgcc.a'. */
3267 /* #define MODDI3_LIBCALL */
3269 /* A C string constant giving the name of the function to call for the
3270 remainder in division of one unsigned full-word by another. If you do not
3271 define this macro, the default name is used, which is `__umoddi3', a
3272 function defined in `libgcc.a'. */
3273 /* #define UMODDI3_LIBCALL */
3275 /* Define this macro as a C statement that declares additional library routines
3276 renames existing ones. `init_optabs' calls this macro after initializing all
3277 the normal library routines. */
3278 /* #define INIT_TARGET_OPTABS */
3280 /* The value of `EDOM' on the target machine, as a C integer constant
3281 expression. If you don't define this macro, GNU CC does not attempt to
3282 deposit the value of `EDOM' into `errno' directly. Look in
3283 `/usr/include/errno.h' to find the value of `EDOM' on your system.
3285 If you do not define `TARGET_EDOM', then compiled code reports domain errors
3286 by calling the library function and letting it report the error. If
3287 mathematical functions on your system use `matherr' when there is an error,
3288 then you should leave `TARGET_EDOM' undefined so that `matherr' is used
3290 /* #define TARGET_EDOM */
3292 /* Define this macro as a C expression to create an rtl expression that refers
3293 to the global "variable" `errno'. (On certain systems, `errno' may not
3294 actually be a variable.) If you don't define this macro, a reasonable
3296 /* #define GEN_ERRNO_RTX */
3298 /* Define this macro if GNU CC should generate calls to the System V (and ANSI
3299 C) library functions `memcpy' and `memset' rather than the BSD functions
3300 `bcopy' and `bzero'.
3302 Defined in svr4.h. */
3303 /* #define TARGET_MEM_FUNCTIONS */
3305 /* Define this macro if only `float' arguments cannot be passed to library
3306 routines (so they must be converted to `double'). This macro affects both
3307 how library calls are generated and how the library routines in `libgcc1.c'
3308 accept their arguments. It is useful on machines where floating and fixed
3309 point arguments are passed differently, such as the i860. */
3310 /* #define LIBGCC_NEEDS_DOUBLE */
3312 /* Define this macro to override the type used by the library routines to pick
3313 up arguments of type `float'. (By default, they use a union of `float' and
3316 The obvious choice would be `float'--but that won't work with traditional C
3317 compilers that expect all arguments declared as `float' to arrive as
3318 `double'. To avoid this conversion, the library routines ask for the value
3319 as some other type and then treat it as a `float'.
3321 On some systems, no other type will work for this. For these systems, you
3322 must use `LIBGCC_NEEDS_DOUBLE' instead, to force conversion of the values
3323 `double' before they are passed. */
3324 /* #define FLOAT_ARG_TYPE */
3326 /* Define this macro to override the way library routines redesignate a `float'
3327 argument as a `float' instead of the type it was passed as. The default is
3328 an expression which takes the `float' field of the union. */
3329 /* #define FLOATIFY(PASSED_VALUE) */
3331 /* Define this macro to override the type used by the library routines to
3332 return values that ought to have type `float'. (By default, they use
3335 The obvious choice would be `float'--but that won't work with traditional C
3336 compilers gratuitously convert values declared as `float' into `double'. */
3337 /* #define FLOAT_VALUE_TYPE */
3339 /* Define this macro to override the way the value of a `float'-returning
3340 library routine should be packaged in order to return it. These functions
3341 are actually declared to return type `FLOAT_VALUE_TYPE' (normally `int').
3343 These values can't be returned as type `float' because traditional C
3344 compilers would gratuitously convert the value to a `double'.
3346 A local variable named `intify' is always available when the macro `INTIFY'
3347 is used. It is a union of a `float' field named `f' and a field named `i'
3348 whose type is `FLOAT_VALUE_TYPE' or `int'.
3350 If you don't define this macro, the default definition works by copying the
3351 value through that union. */
3352 /* #define INTIFY(FLOAT_VALUE) */
3354 /* Define this macro as the name of the data type corresponding to `SImode' in
3355 the system's own C compiler.
3357 You need not define this macro if that type is `long int', as it usually is. */
3358 /* #define nongcc_SI_type */
3360 /* Define this macro as the name of the data type corresponding to the
3361 word_mode in the system's own C compiler.
3363 You need not define this macro if that type is `long int', as it usually is. */
3364 /* #define nongcc_word_type */
3366 /* Define these macros to supply explicit C statements to carry out various
3367 arithmetic operations on types `float' and `double' in the library routines
3368 in `libgcc1.c'. See that file for a full list of these macros and their
3371 On most machines, you don't need to define any of these macros, because the
3372 C compiler that comes with the system takes care of doing them. */
3373 /* #define perform_... */
3375 /* Define this macro to generate code for Objective C message sending using the
3376 calling convention of the NeXT system. This calling convention involves
3377 passing the object, the selector and the method arguments all at once to the
3378 method-lookup library function.
3380 The default calling convention passes just the object and the selector to
3381 the lookup function, which returns a pointer to the method. */
3382 /* #define NEXT_OBJC_RUNTIME */
3385 /* Addressing Modes */
3387 /* Define this macro if the machine supports post-increment addressing. */
3388 #define HAVE_POST_INCREMENT 1
3390 /* Similar for other kinds of addressing. */
3391 /* #define HAVE_PRE_INCREMENT 0 */
3392 #define HAVE_POST_DECREMENT 1
3393 /* #define HAVE_PRE_DECREMENT 0 */
3395 /* A C expression that is 1 if the RTX X is a constant which is a valid
3396 address. On most machines, this can be defined as `CONSTANT_P (X)', but a
3397 few machines are more restrictive in which constant addresses are supported.
3399 `CONSTANT_P' accepts integer-values expressions whose values are not
3400 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions
3401 and `const' arithmetic expressions, in addition to `const_int' and
3402 `const_double' expressions. */
3403 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
3405 /* A number, the maximum number of registers that can appear in a valid memory
3406 address. Note that it is up to you to specify a value equal to the maximum
3407 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
3408 #define MAX_REGS_PER_ADDRESS 2
3410 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
3411 RTX) is a legitimate memory address on the target machine for a memory
3412 operand of mode MODE.
3414 It usually pays to define several simpler macros to serve as subroutines for
3415 this one. Otherwise it may be too complicated to understand.
3417 This macro must exist in two variants: a strict variant and a non-strict
3418 one. The strict variant is used in the reload pass. It must be defined so
3419 that any pseudo-register that has not been allocated a hard register is
3420 considered a memory reference. In contexts where some kind of register is
3421 required, a pseudo-register with no hard register must be rejected.
3423 The non-strict variant is used in other passes. It must be defined to
3424 accept all pseudo-registers in every context where some kind of register is
3427 Compiler source files that want to use the strict variant of this macro
3428 define the macro `REG_OK_STRICT'. You should use an `#ifdef REG_OK_STRICT'
3429 conditional to define the strict variant in that case and the non-strict
3432 Subroutines to check for acceptable registers for various purposes (one for
3433 base registers, one for index registers, and so on) are typically among the
3434 subroutines used to define `GO_IF_LEGITIMATE_ADDRESS'. Then only these
3435 subroutine macros need have two variants; the higher levels of macros may be
3436 the same whether strict or not.
3438 Normally, constant addresses which are the sum of a `symbol_ref' and an
3439 integer are stored inside a `const' RTX to mark them as constant.
3440 Therefore, there is no need to recognize such sums specifically as
3441 legitimate addresses. Normally you would simply recognize any `const' as
3444 Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle constant sums that
3445 are not marked with `const'. It assumes that a naked `plus' indicates
3446 indexing. If so, then you *must* reject such naked constant sums as
3447 illegitimate addresses, so that none of them will be given to
3448 `PRINT_OPERAND_ADDRESS'.
3450 On some machines, whether a symbolic address is legitimate depends on the
3451 section that the address refers to. On these machines, define the macro
3452 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
3453 then check for it here. When you see a `const', you will have to look
3454 inside it to find the `symbol_ref' in order to determine the section. *Note
3457 The best way to modify the name string is by adding text to the beginning,
3458 with suitable punctuation to prevent any ambiguity. Allocate the new name
3459 in `saveable_obstack'. You will have to modify `ASM_OUTPUT_LABELREF' to
3460 remove and decode the added text and output the name accordingly, and define
3461 `STRIP_NAME_ENCODING' to access the original name string.
3463 You can check the information stored here into the `symbol_ref' in the
3464 definitions of the macros `GO_IF_LEGITIMATE_ADDRESS' and
3465 `PRINT_OPERAND_ADDRESS'. */
3467 #ifdef REG_OK_STRICT
3468 #define REG_OK_STRICT_P 1
3470 #define REG_OK_STRICT_P 0
3473 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
3475 if (d30v_legitimate_address_p ((int)MODE, X, REG_OK_STRICT_P)) \
3479 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3480 use as a base register. For hard registers, it should always accept those
3481 which the hardware permits and reject the others. Whether the macro accepts
3482 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
3483 described above. This usually requires two variant definitions, of which
3484 `REG_OK_STRICT' controls the one actually used. */
3486 #ifdef REG_OK_STRICT
3487 #define REG_OK_FOR_BASE_P(X) (GPR_P (REGNO (X)))
3489 #define REG_OK_FOR_BASE_P(X) (GPR_OR_PSEUDO_P (REGNO (X)))
3492 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3493 use as an index register.
3495 The difference between an index register and a base register is that the
3496 index register may be scaled. If an address involves the sum of two
3497 registers, neither one of them scaled, then either one may be labeled the
3498 "base" and the other the "index"; but whichever labeling is used must fit
3499 the machine's constraints of which registers may serve in each capacity.
3500 The compiler will try both labelings, looking for one that is valid, and
3501 will reload one or both registers only if neither labeling works. */
3503 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
3505 /* A C compound statement that attempts to replace X with a valid memory
3506 address for an operand of mode MODE. WIN will be a C statement label
3507 elsewhere in the code; the macro definition may use
3509 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
3511 to avoid further processing if the address has become legitimate.
3513 X will always be the result of a call to `break_out_memory_refs', and OLDX
3514 will be the operand that was given to that function to produce X.
3516 The code generated by this macro should not alter the substructure of X. If
3517 it transforms X into a more legitimate form, it should assign X (which will
3518 always be a C variable) a new value.
3520 It is not necessary for this macro to come up with a legitimate address.
3521 The compiler has standard ways of doing so in all cases. In fact, it is
3522 safe for this macro to do nothing. But often a machine-dependent strategy
3523 can generate better code. */
3525 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
3527 rtx y = d30v_legitimize_address (X, OLDX, (int)MODE, REG_OK_STRICT_P); \
3531 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); \
3535 /* A C statement or compound statement with a conditional `goto LABEL;'
3536 executed if memory address X (an RTX) can have different meanings depending
3537 on the machine mode of the memory reference it is used for or if the address
3538 is valid for some modes but not others.
3540 Autoincrement and autodecrement addresses typically have mode-dependent
3541 effects because the amount of the increment or decrement is the size of the
3542 operand being addressed. Some machines have other mode-dependent addresses.
3543 Many RISC machines have no mode-dependent addresses.
3545 You may assume that ADDR is a valid address for the machine. */
3547 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
3549 if (d30v_mode_dependent_address_p (ADDR)) \
3553 /* A C expression that is nonzero if X is a legitimate constant for an
3554 immediate operand on the target machine. You can assume that X satisfies
3555 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable
3556 definition for this macro on machines where anything `CONSTANT_P' is valid. */
3557 #define LEGITIMATE_CONSTANT_P(X) 1
3560 /* Condition Code Status */
3562 /* C code for a data type which is used for declaring the `mdep' component of
3563 `cc_status'. It defaults to `int'.
3565 This macro is not used on machines that do not use `cc0'. */
3566 /* #define CC_STATUS_MDEP */
3568 /* A C expression to initialize the `mdep' field to "empty". The default
3569 definition does nothing, since most machines don't use the field anyway. If
3570 you want to use the field, you should probably define this macro to
3573 This macro is not used on machines that do not use `cc0'. */
3574 /* #define CC_STATUS_MDEP_INIT */
3576 /* A C compound statement to set the components of `cc_status' appropriately
3577 for an insn INSN whose body is EXP. It is this macro's responsibility to
3578 recognize insns that set the condition code as a byproduct of other activity
3579 as well as those that explicitly set `(cc0)'.
3581 This macro is not used on machines that do not use `cc0'.
3583 If there are insns that do not set the condition code but do alter other
3584 machine registers, this macro must check to see whether they invalidate the
3585 expressions that the condition code is recorded as reflecting. For example,
3586 on the 68000, insns that store in address registers do not set the condition
3587 code, which means that usually `NOTICE_UPDATE_CC' can leave `cc_status'
3588 unaltered for such insns. But suppose that the previous insn set the
3589 condition code based on location `a4@(102)' and the current insn stores a
3590 new value in `a4'. Although the condition code is not changed by this, it
3591 will no longer be true that it reflects the contents of `a4@(102)'.
3592 Therefore, `NOTICE_UPDATE_CC' must alter `cc_status' in this case to say
3593 that nothing is known about the condition code value.
3595 The definition of `NOTICE_UPDATE_CC' must be prepared to deal with the
3596 results of peephole optimization: insns whose patterns are `parallel' RTXs
3597 containing various `reg', `mem' or constants which are just the operands.
3598 The RTL structure of these insns is not sufficient to indicate what the
3599 insns actually do. What `NOTICE_UPDATE_CC' should do when it sees one is
3600 just to run `CC_STATUS_INIT'.
3602 A possible definition of `NOTICE_UPDATE_CC' is to call a function that looks
3603 at an attribute (*note Insn Attributes::.) named, for example, `cc'. This
3604 avoids having detailed information about patterns in two places, the `md'
3605 file and in `NOTICE_UPDATE_CC'. */
3606 /* #define NOTICE_UPDATE_CC(EXP, INSN) */
3608 /* A list of names to be used for additional modes for condition code values in
3609 registers (*note Jump Patterns::.). These names are added to `enum
3610 machine_mode' and all have class `MODE_CC'. By convention, they should
3611 start with `CC' and end with `mode'.
3613 You should only define this macro if your machine does not use `cc0' and
3614 only if additional modes are required. */
3615 /* #define EXTRA_CC_MODES */
3617 /* Returns a mode from class `MODE_CC' to be used when comparison operation
3618 code OP is applied to rtx X and Y. For example, on the Sparc,
3619 `SELECT_CC_MODE' is defined as (see *note Jump Patterns::. for a
3620 description of the reason for this definition)
3622 #define SELECT_CC_MODE(OP,X,Y) \
3623 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
3624 ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode) \
3625 : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \
3626 || GET_CODE (X) == NEG) \
3627 ? CC_NOOVmode : CCmode))
3629 You need not define this macro if `EXTRA_CC_MODES' is not defined. */
3630 /* #define SELECT_CC_MODE(OP, X, Y) */
3632 /* One some machines not all possible comparisons are defined, but you can
3633 convert an invalid comparison into a valid one. For example, the Alpha does
3634 not have a `GT' comparison, but you can use an `LT' comparison instead and
3635 swap the order of the operands.
3637 On such machines, define this macro to be a C statement to do any required
3638 conversions. CODE is the initial comparison code and OP0 and OP1 are the
3639 left and right operands of the comparison, respectively. You should modify
3640 CODE, OP0, and OP1 as required.
3642 GNU CC will not assume that the comparison resulting from this macro is
3643 valid but will see if the resulting insn matches a pattern in the `md' file.
3645 You need not define this macro if it would never change the comparison code
3647 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */
3649 /* A C expression whose value is one if it is always safe to reverse a
3650 comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return MODE for
3651 a floating-point inequality comparison, then `REVERSIBLE_CC_MODE (MODE)'
3654 You need not define this macro if it would always returns zero or if the
3655 floating-point format is anything other than `IEEE_FLOAT_FORMAT'. For
3656 example, here is the definition used on the Sparc, where floating-point
3657 inequality comparisons are always given `CCFPEmode':
3659 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) */
3660 /* #define REVERSIBLE_CC_MODE(MODE) */
3663 /* Describing Relative Costs of Operations */
3665 /* A part of a C `switch' statement that describes the relative costs of
3666 constant RTL expressions. It must contain `case' labels for expression
3667 codes `const_int', `const', `symbol_ref', `label_ref' and `const_double'.
3668 Each case must ultimately reach a `return' statement to return the relative
3669 cost of the use of that kind of constant value in an expression. The cost
3670 may depend on the precise value of the constant, which is available for
3671 examination in X, and the rtx code of the expression in which it is
3672 contained, found in OUTER_CODE.
3674 CODE is the expression code--redundant, since it can be obtained with
3677 /* On the d30v, consider operatnds that fit in a short instruction very
3678 cheap. However, at this time, it causes cse to generate incorrect
3679 code, so disable it for now. */
3681 #define CONST_COSTS(X, CODE, OUTER_CODE) \
3683 if (IN_RANGE_P (INTVAL (X), 0, 31)) \
3685 else if ((OUTER_CODE) == LEU && (OUTER_CODE) == LTU \
3686 && (OUTER_CODE) == GEU && (OUTER_CODE) == GTU) \
3687 return IN_RANGE_P (INTVAL (X), 32, 63) ? 0 : COSTS_N_INSNS (2); \
3689 return IN_RANGE_P (INTVAL (X), -31, -1) ? 0 : COSTS_N_INSNS (2); \
3693 return COSTS_N_INSNS (2); \
3694 case CONST_DOUBLE: \
3695 return COSTS_N_INSNS ((GET_MODE (X) == SFmode) ? 2 : 4);
3697 #define CONST_COSTS(X, CODE, OUTER_CODE)
3700 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be
3701 used, for example, to indicate how costly a multiply instruction is. In
3702 writing this macro, you can use the construct `COSTS_N_INSNS (N)' to specify
3703 a cost equal to N fast instructions. OUTER_CODE is the code of the
3704 expression in which X is contained.
3706 This macro is optional; do not define it if the default cost assumptions are
3707 adequate for the target machine. */
3708 #define RTX_COSTS(X, CODE, OUTER_CODE) \
3710 return COSTS_N_INSNS ((GET_CODE (XEXP (x, 1)) == CONST_INT \
3711 && exact_log2 (INTVAL (XEXP (x, 1))) >= 0) \
3714 /* An expression giving the cost of an addressing mode that contains ADDRESS.
3715 If not defined, the cost is computed from the ADDRESS expression and the
3716 `CONST_COSTS' values.
3718 For most CISC machines, the default cost is a good approximation of the true
3719 cost of the addressing mode. However, on RISC machines, all instructions
3720 normally have the same length and execution time. Hence all addresses will
3723 In cases where more than one form of an address is known, the form with the
3724 lowest cost will be used. If multiple forms have the same, lowest, cost,
3725 the one that is the most complex will be used.
3727 For example, suppose an address that is equal to the sum of a register and a
3728 constant is used twice in the same basic block. When this macro is not
3729 defined, the address will be computed in a register and memory references
3730 will be indirect through that register. On machines where the cost of the
3731 addressing mode containing the sum is no higher than that of a simple
3732 indirect reference, this will produce an additional instruction and possibly
3733 require an additional register. Proper specification of this macro
3734 eliminates this overhead for such machines.
3736 Similar use of this macro is made in strength reduction of loops.
3738 ADDRESS need not be valid as an address. In such a case, the cost is not
3739 relevant and can be any value; invalid addresses need not be assigned a
3742 On machines where an address involving more than one register is as cheap as
3743 an address computation involving only one register, defining `ADDRESS_COST'
3744 to reflect this can cause two registers to be live over a region of code
3745 where only one would have been if `ADDRESS_COST' were not defined in that
3746 manner. This effect should be considered in the definition of this macro.
3747 Equivalent costs should probably only be given to addresses with different
3748 numbers of registers on machines with lots of registers.
3750 This macro will normally either not be defined or be defined as a constant. */
3751 #define ADDRESS_COST(ADDRESS) 0
3753 /* A C expression for the cost of moving data from a register in class FROM to
3754 one in class TO. The classes are expressed using the enumeration values
3755 such as `GENERAL_REGS'. A value of 4 is the default; other values are
3756 interpreted relative to that.
3758 It is not required that the cost always equal 2 when FROM is the same as TO;
3759 on some machines it is expensive to move between registers if they are not
3762 If reload sees an insn consisting of a single `set' between two hard
3763 registers, and if `REGISTER_MOVE_COST' applied to their classes returns a
3764 value of 2, reload does not check to ensure that the constraints of the insn
3765 are met. Setting a cost of other than 2 will allow reload to verify that
3766 the constraints are met. You should do this if the `movM' pattern's
3767 constraints do not allow such copying. */
3769 #define REGISTER_MOVE_COST(FROM, TO) \
3770 (((FROM) != GPR_REGS && (FROM) != EVEN_REGS \
3771 && (TO) != GPR_REGS && (TO) != EVEN_REGS) ? 4 : 2)
3773 /* A C expression for the cost of moving data of mode M between a register and
3774 memory. A value of 2 is the default; this cost is relative to those in
3775 `REGISTER_MOVE_COST'.
3777 If moving between registers and memory is more expensive than between two
3778 registers, you should define this macro to express the relative cost. */
3779 #define MEMORY_MOVE_COST(M,C,I) 4
3781 /* A C expression for the cost of a branch instruction. A value of 1 is the
3782 default; other values are interpreted relative to that. */
3784 #define BRANCH_COST d30v_branch_cost
3786 #define D30V_DEFAULT_BRANCH_COST 2
3788 /* Values of the -mbranch-cost=n string. */
3789 extern int d30v_branch_cost
;
3790 extern const char *d30v_branch_cost_string
;
3792 /* Here are additional macros which do not specify precise relative costs, but
3793 only that certain actions are more expensive than GNU CC would ordinarily
3796 /* Define this macro as a C expression which is nonzero if accessing less than
3797 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
3798 word of memory, i.e., if such access require more than one instruction or if
3799 there is no difference in cost between byte and (aligned) word loads.
3801 When this macro is not defined, the compiler will access a field by finding
3802 the smallest containing object; when it is defined, a fullword load will be
3803 used if alignment permits. Unless bytes accesses are faster than word
3804 accesses, using word accesses is preferable since it may eliminate
3805 subsequent memory access if subsequent accesses occur to other fields in the
3806 same word of the structure, but to different bytes. */
3807 #define SLOW_BYTE_ACCESS 1
3809 /* Define this macro if zero-extension (of a `char' or `short' to an `int') can
3810 be done faster if the destination is a register that is known to be zero.
3812 If you define this macro, you must have instruction patterns that recognize
3813 RTL structures like this:
3815 (set (strict_low_part (subreg:QI (reg:SI ...) 0)) ...)
3817 and likewise for `HImode'. */
3818 #define SLOW_ZERO_EXTEND 0
3820 /* Define this macro to be the value 1 if unaligned accesses have a cost many
3821 times greater than aligned accesses, for example if they are emulated in a
3824 When this macro is non-zero, the compiler will act as if `STRICT_ALIGNMENT'
3825 were non-zero when generating code for block moves. This can cause
3826 significantly more instructions to be produced. Therefore, do not set this
3827 macro non-zero if unaligned accesses only add a cycle or two to the time for
3830 If the value of this macro is always zero, it need not be defined. */
3831 /* #define SLOW_UNALIGNED_ACCESS */
3833 /* Define this macro to inhibit strength reduction of memory addresses. (On
3834 some machines, such strength reduction seems to do harm rather than good.) */
3835 /* #define DONT_REDUCE_ADDR */
3837 /* The number of scalar move insns which should be generated instead of a
3838 string move insn or a library call. Increasing the value will always make
3839 code faster, but eventually incurs high cost in increased code size.
3841 If you don't define this, a reasonable default is used. */
3842 /* #define MOVE_RATIO */
3844 /* Define this macro if it is as good or better to call a constant function
3845 address than to call an address kept in a register. */
3846 #define NO_FUNCTION_CSE
3848 /* Define this macro if it is as good or better for a function to call itself
3849 with an explicit address than to call an address kept in a register. */
3850 /* #define NO_RECURSIVE_FUNCTION_CSE */
3852 /* A C statement (sans semicolon) to update the integer variable COST based on
3853 the relationship between INSN that is dependent on DEP_INSN through the
3854 dependence LINK. The default is to make no adjustment to COST. This can be
3855 used for example to specify to the scheduler that an output- or
3856 anti-dependence does not incur the same cost as a data-dependence. */
3858 #define ADJUST_COST(INSN,LINK,DEP_INSN,COST) \
3859 (COST) = d30v_adjust_cost (INSN, LINK, DEP_INSN, COST)
3861 /* A C statement (sans semicolon) to update the integer scheduling
3862 priority `INSN_PRIORITY(INSN)'. Reduce the priority to execute
3863 the INSN earlier, increase the priority to execute INSN later.
3864 Do not define this macro if you do not need to adjust the
3865 scheduling priorities of insns. */
3866 /* #define ADJUST_PRIORITY (INSN) */
3868 /* Macro to determine whether the Haifa scheduler is used. */
3876 /* Dividing the output into sections. */
3878 /* A C expression whose value is a string containing the assembler operation
3879 that should precede instructions and read-only data. Normally `".text"' is
3881 #define TEXT_SECTION_ASM_OP "\t.text"
3883 /* A C expression whose value is a string containing the assembler operation to
3884 identify the following data as writable initialized data. Normally
3885 `".data"' is right. */
3886 #define DATA_SECTION_ASM_OP "\t.data"
3888 /* if defined, a C expression whose value is a string containing the assembler
3889 operation to identify the following data as shared data. If not defined,
3890 `DATA_SECTION_ASM_OP' will be used. */
3891 /* #define SHARED_SECTION_ASM_OP */
3893 /* If defined, a C expression whose value is a string containing the
3894 assembler operation to identify the following data as
3895 uninitialized global data. If not defined, and neither
3896 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
3897 uninitialized global data will be output in the data section if
3898 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
3900 #define BSS_SECTION_ASM_OP "\t.bss"
3902 /* If defined, a C expression whose value is a string containing the
3903 assembler operation to identify the following data as
3904 uninitialized global shared data. If not defined, and
3905 `BSS_SECTION_ASM_OP' is, the latter will be used. */
3906 /* #define SHARED_BSS_SECTION_ASM_OP */
3908 /* A list of names for sections other than the standard two, which are
3909 `in_text' and `in_data'. You need not define this macro on a system with no
3910 other sections (that GCC needs to use).
3912 Defined in svr4.h. */
3913 /* #define EXTRA_SECTIONS */
3915 /* One or more functions to be defined in `varasm.c'. These functions should
3916 do jobs analogous to those of `text_section' and `data_section', for your
3917 additional sections. Do not define this macro if you do not define
3920 Defined in svr4.h. */
3921 /* #define EXTRA_SECTION_FUNCTIONS */
3923 /* On most machines, read-only variables, constants, and jump tables are placed
3924 in the text section. If this is not the case on your machine, this macro
3925 should be defined to be the name of a function (either `data_section' or a
3926 function defined in `EXTRA_SECTIONS') that switches to the section to be
3927 used for read-only items.
3929 If these items should be placed in the text section, this macro should not
3931 /* #define READONLY_DATA_SECTION */
3933 /* A C statement or statements to switch to the appropriate section for output
3934 of EXP. You can assume that EXP is either a `VAR_DECL' node or a constant
3935 of some sort. RELOC indicates whether the initial value of EXP requires
3936 link-time relocations. Select the section by calling `text_section' or one
3937 of the alternatives for other sections.
3939 Do not define this macro if you put all read-only variables and constants in
3940 the read-only data section (usually the text section).
3942 Defined in svr4.h. */
3943 /* #define SELECT_SECTION(EXP, RELOC) */
3945 /* A C statement or statements to switch to the appropriate section for output
3946 of RTX in mode MODE. You can assume that RTX is some kind of constant in
3947 RTL. The argument MODE is redundant except in the case of a `const_int'
3948 rtx. Select the section by calling `text_section' or one of the
3949 alternatives for other sections.
3951 Do not define this macro if you put all constants in the read-only data
3954 Defined in svr4.h. */
3955 /* #define SELECT_RTX_SECTION(MODE, RTX) */
3957 /* Define this macro if jump tables (for `tablejump' insns) should be output in
3958 the text section, along with the assembler instructions. Otherwise, the
3959 readonly data section is used.
3961 This macro is irrelevant if there is no separate readonly data section. */
3962 /* #define JUMP_TABLES_IN_TEXT_SECTION */
3964 /* Define this macro if references to a symbol must be treated differently
3965 depending on something about the variable or function named by the symbol
3966 (such as what section it is in).
3968 The macro definition, if any, is executed immediately after the rtl for DECL
3969 has been created and stored in `DECL_RTL (DECL)'. The value of the rtl will
3970 be a `mem' whose address is a `symbol_ref'.
3972 The usual thing for this macro to do is to record a flag in the `symbol_ref'
3973 (such as `SYMBOL_REF_FLAG') or to store a modified name string in the
3974 `symbol_ref' (if one bit is not enough information). */
3975 /* #define ENCODE_SECTION_INFO(DECL) */
3977 /* Decode SYM_NAME and store the real name part in VAR, sans the characters
3978 that encode section info. Define this macro if `ENCODE_SECTION_INFO' alters
3979 the symbol's name string. */
3980 /* #define STRIP_NAME_ENCODING(VAR, SYM_NAME) */
3982 /* A C expression which evaluates to true if DECL should be placed
3983 into a unique section for some target-specific reason. If you do
3984 not define this macro, the default is `0'. Note that the flag
3985 `-ffunction-sections' will also cause functions to be placed into
3988 Defined in svr4.h. */
3989 /* #define UNIQUE_SECTION_P(DECL) */
3991 /* A C statement to build up a unique section name, expressed as a
3992 STRING_CST node, and assign it to `DECL_SECTION_NAME (DECL)'.
3993 RELOC indicates whether the initial value of EXP requires
3994 link-time relocations. If you do not define this macro, GNU CC
3995 will use the symbol name prefixed by `.' as the section name.
3997 Defined in svr4.h. */
3998 /* #define UNIQUE_SECTION(DECL, RELOC) */
4001 /* Position Independent Code. */
4003 /* The register number of the register used to address a table of static data
4004 addresses in memory. In some cases this register is defined by a
4005 processor's "application binary interface" (ABI). When this macro is
4006 defined, RTL is generated for this register once, as with the stack pointer
4007 and frame pointer registers. If this macro is not defined, it is up to the
4008 machine-dependent files to allocate such a register (if necessary). */
4009 /* #define PIC_OFFSET_TABLE_REGNUM */
4011 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is
4012 clobbered by calls. Do not define this macro if `PIC_OFFSET_TABLE_REGNUM'
4014 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */
4016 /* By generating position-independent code, when two different programs (A and
4017 B) share a common library (libC.a), the text of the library can be shared
4018 whether or not the library is linked at the same address for both programs.
4019 In some of these environments, position-independent code requires not only
4020 the use of different addressing modes, but also special code to enable the
4021 use of these addressing modes.
4023 The `FINALIZE_PIC' macro serves as a hook to emit these special codes once
4024 the function is being compiled into assembly code, but not before. (It is
4025 not done before, because in the case of compiling an inline function, it
4026 would lead to multiple PIC prologues being included in functions which used
4027 inline functions and were compiled to assembly language.) */
4028 /* #define FINALIZE_PIC */
4030 /* A C expression that is nonzero if X is a legitimate immediate operand on the
4031 target machine when generating position independent code. You can assume
4032 that X satisfies `CONSTANT_P', so you need not check this. You can also
4033 assume FLAG_PIC is true, so you need not check it either. You need not
4034 define this macro if all constants (including `SYMBOL_REF') can be immediate
4035 operands when generating position independent code. */
4036 /* #define LEGITIMATE_PIC_OPERAND_P(X) */
4039 /* The Overall Framework of an Assembler File. */
4041 /* A C expression which outputs to the stdio stream STREAM some appropriate
4042 text to go at the start of an assembler file.
4044 Normally this macro is defined to output a line containing `#NO_APP', which
4045 is a comment that has no effect on most assemblers but tells the GNU
4046 assembler that it can save time by not checking for certain assembler
4049 On systems that use SDB, it is necessary to output certain commands; see
4052 Defined in svr4.h. */
4054 /* #define ASM_FILE_START(STREAM) \
4055 output_file_directive ((STREAM), main_input_filename) */
4057 /* A C expression which outputs to the stdio stream STREAM some appropriate
4058 text to go at the end of an assembler file.
4060 If this macro is not defined, the default is to output nothing special at
4061 the end of the file. Most systems don't require any definition.
4063 On systems that use SDB, it is necessary to output certain commands; see
4066 Defined in svr4.h. */
4067 /* #define ASM_FILE_END(STREAM) */
4069 /* A C statement to output assembler commands which will identify the object
4070 file as having been compiled with GNU CC (or another GNU compiler).
4072 If you don't define this macro, the string `gcc_compiled.:' is output. This
4073 string is calculated to define a symbol which, on BSD systems, will never be
4074 defined for any other reason. GDB checks for the presence of this symbol
4075 when reading the symbol table of an executable.
4077 On non-BSD systems, you must arrange communication with GDB in some other
4078 fashion. If GDB is not used on your system, you can define this macro with
4081 Defined in svr4.h. */
4082 /* #define ASM_IDENTIFY_GCC(FILE) */
4084 /* Like ASM_IDENTIFY_GCC, but used when dbx debugging is selected to emit
4085 a stab the debugger uses to identify gcc as the compiler that is emitted
4086 after the stabs for the filename, which makes it easier for GDB to parse.
4088 Defined in svr4.h. */
4089 /* #define ASM_IDENTIFY_GCC_AFTER_SOURCE(FILE) */
4091 /* A C string constant describing how to begin a comment in the target
4092 assembler language. The compiler assumes that the comment will end at the
4094 #define ASM_COMMENT_START ";"
4096 /* A C string constant for text to be output before each `asm' statement or
4097 group of consecutive ones. Normally this is `"#APP"', which is a comment
4098 that has no effect on most assemblers but tells the GNU assembler that it
4099 must check the lines that follow for all valid assembler constructs. */
4100 #define ASM_APP_ON "#APP\n"
4102 /* A C string constant for text to be output after each `asm' statement or
4103 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
4104 GNU assembler to resume making the time-saving assumptions that are valid
4105 for ordinary compiler output. */
4106 #define ASM_APP_OFF "#NO_APP\n"
4108 /* A C statement to output COFF information or DWARF debugging information
4109 which indicates that filename NAME is the current source file to the stdio
4112 This macro need not be defined if the standard form of output for the file
4113 format in use is appropriate. */
4114 /* #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
4116 /* A C statement to output DBX or SDB debugging information before code for
4117 line number LINE of the current source file to the stdio stream STREAM.
4119 This macro need not be defined if the standard form of debugging information
4120 for the debugger in use is appropriate.
4122 Defined in svr4.h. */
4123 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) */
4125 /* A C statement to output something to the assembler file to handle a `#ident'
4126 directive containing the text STRING. If this macro is not defined, nothing
4127 is output for a `#ident' directive.
4129 Defined in svr4.h. */
4130 /* #define ASM_OUTPUT_IDENT(STREAM, STRING) */
4132 /* A C statement to output something to the assembler file to switch to section
4133 NAME for object DECL which is either a `FUNCTION_DECL', a `VAR_DECL' or
4134 `NULL_TREE'. Some target formats do not support arbitrary sections. Do not
4135 define this macro in such cases.
4137 At present this macro is only used to support section attributes. When this
4138 macro is undefined, section attributes are disabled.
4140 Defined in svr4.h. */
4141 /* #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME) */
4143 /* A C statement to output any assembler statements which are required to
4144 precede any Objective C object definitions or message sending. The
4145 statement is executed only when compiling an Objective C program. */
4146 /* #define OBJC_PROLOGUE */
4149 /* Output of Data. */
4151 /* A C statement to output to the stdio stream STREAM an assembler instruction
4152 to assemble a floating-point constant of `TFmode', `DFmode', `SFmode',
4153 `TQFmode', `HFmode', or `QFmode', respectively, whose value is VALUE. VALUE
4154 will be a C expression of type `REAL_VALUE_TYPE'. Macros such as
4155 `REAL_VALUE_TO_TARGET_DOUBLE' are useful for writing these definitions. */
4157 /* #define ASM_OUTPUT_LONG_DOUBLE(STREAM, VALUE) */
4159 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
4161 if (REAL_VALUE_ISINF (VALUE) \
4162 || REAL_VALUE_ISNAN (VALUE) \
4163 || REAL_VALUE_MINUS_ZERO (VALUE)) \
4166 REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \
4167 fprintf (FILE, "\t.long 0x%lx\n\t.long 0x%lx\n", \
4168 t[0] & 0xffffffff, t[1] & 0xffffffff); \
4173 REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", str); \
4174 fprintf (FILE, "\t.double 0d%s\n", str); \
4178 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
4180 if (REAL_VALUE_ISINF (VALUE) \
4181 || REAL_VALUE_ISNAN (VALUE) \
4182 || REAL_VALUE_MINUS_ZERO (VALUE)) \
4185 REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \
4186 fprintf (FILE, "\t.long 0x%lx\n", t & 0xffffffff); \
4191 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \
4192 fprintf (FILE, "\t.float 0d%s\n", str); \
4196 /* #define ASM_OUTPUT_THREE_QUARTER_FLOAT(STREAM, VALUE) */
4197 /* #define ASM_OUTPUT_SHORT_FLOAT(STREAM, VALUE) */
4198 /* #define ASM_OUTPUT_BYTE_FLOAT(STREAM, VALUE) */
4200 /* A C statement to output to the stdio stream STREAM an assembler instruction
4201 to assemble an integer of 16, 8, 4, 2 or 1 bytes, respectively, whose value
4202 is VALUE. The argument EXP will be an RTL expression which represents a
4203 constant value. Use `output_addr_const (STREAM, EXP)' to output this value
4204 as an assembler expression.
4206 For sizes larger than `UNITS_PER_WORD', if the action of a macro would be
4207 identical to repeatedly calling the macro corresponding to a size of
4208 `UNITS_PER_WORD', once for each word, you need not define the macro. */
4210 /* #define ASM_OUTPUT_QUADRUPLE_INT(STREAM, EXP) */
4211 /* #define ASM_OUTPUT_DOUBLE_INT(STREAM, EXP) */
4213 #define ASM_OUTPUT_INT(STREAM, EXP) \
4215 fputs ("\t.word ", STREAM); \
4216 output_addr_const (STREAM, EXP); \
4217 putc ('\n', STREAM); \
4220 #define ASM_OUTPUT_SHORT(STREAM, EXP) \
4222 fputs ("\t.hword ", STREAM); \
4223 output_addr_const (STREAM, EXP); \
4224 putc ('\n', STREAM); \
4227 #define ASM_OUTPUT_CHAR(STREAM, EXP) \
4229 fputs ("\t.byte ", STREAM); \
4230 output_addr_const (STREAM, EXP); \
4231 putc ('\n', STREAM); \
4234 /* A C statement to output to the stdio stream STREAM an assembler instruction
4235 to assemble a single byte containing the number VALUE. */
4237 #define ASM_OUTPUT_BYTE(STREAM, VALUE) \
4238 fprintf (STREAM, "%s%d\n", ASM_BYTE_OP, (int)(VALUE))
4240 /* A C string constant giving the pseudo-op to use for a sequence of
4241 single-byte constants. If this macro is not defined, the default
4244 Defined in svr4.h. */
4245 /* #define ASM_BYTE_OP */
4247 /* A C statement to output to the stdio stream STREAM an assembler instruction
4248 to assemble a string constant containing the LEN bytes at PTR. PTR will be
4249 a C expression of type `char *' and LEN a C expression of type `int'.
4251 If the assembler has a `.ascii' pseudo-op as found in the Berkeley Unix
4252 assembler, do not define the macro `ASM_OUTPUT_ASCII'.
4254 Defined in svr4.h. */
4255 /* #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) */
4257 /* You may define this macro as a C expression. You should define the
4258 expression to have a non-zero value if GNU CC should output the
4259 constant pool for a function before the code for the function, or
4260 a zero value if GNU CC should output the constant pool after the
4261 function. If you do not define this macro, the usual case, GNU CC
4262 will output the constant pool before the function. */
4263 /* #define CONSTANT_POOL_BEFORE_FUNCTION */
4265 /* A C statement to output assembler commands to define the start of the
4266 constant pool for a function. FUNNAME is a string giving the name of the
4267 function. Should the return type of the function be required, it can be
4268 obtained via FUNDECL. SIZE is the size, in bytes, of the constant pool that
4269 will be written immediately after this call.
4271 If no constant-pool prefix is required, the usual case, this macro need not
4273 /* #define ASM_OUTPUT_POOL_PROLOGUE(FILE FUNNAME FUNDECL SIZE) */
4275 /* A C statement (with or without semicolon) to output a constant in the
4276 constant pool, if it needs special treatment. (This macro need not do
4277 anything for RTL expressions that can be output normally.)
4279 The argument FILE is the standard I/O stream to output the assembler code
4280 on. X is the RTL expression for the constant to output, and MODE is the
4281 machine mode (in case X is a `const_int'). ALIGN is the required alignment
4282 for the value X; you should output an assembler directive to force this much
4285 The argument LABELNO is a number to use in an internal label for the address
4286 of this pool entry. The definition of this macro is responsible for
4287 outputting the label definition at the proper place. Here is how to do
4290 ASM_OUTPUT_INTERNAL_LABEL (FILE, "LC", LABELNO);
4292 When you output a pool entry specially, you should end with a `goto' to the
4293 label JUMPTO. This will prevent the same pool entry from being output a
4294 second time in the usual manner.
4296 You need not define this macro if it would do nothing. */
4297 /* #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) */
4299 /* Define this macro as a C expression which is nonzero if the constant EXP, of
4300 type `tree', should be output after the code for a function. The compiler
4301 will normally output all constants before the function; you need not define
4302 this macro if this is OK. */
4303 /* #define CONSTANT_AFTER_FUNCTION_P(EXP) */
4305 /* A C statement to output assembler commands to at the end of the constant
4306 pool for a function. FUNNAME is a string giving the name of the function.
4307 Should the return type of the function be required, you can obtain it via
4308 FUNDECL. SIZE is the size, in bytes, of the constant pool that GNU CC wrote
4309 immediately before this call.
4311 If no constant-pool epilogue is required, the usual case, you need not
4312 define this macro. */
4313 /* #define ASM_OUTPUT_POOL_EPILOGUE (FILE FUNNAME FUNDECL SIZE) */
4315 /* Define this macro as a C expression which is nonzero if C is used as a
4316 logical line separator by the assembler.
4318 If you do not define this macro, the default is that only the character `;'
4319 is treated as a logical line separator. */
4320 /* #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) */
4322 /* These macros are defined as C string constant, describing the syntax in the
4323 assembler for grouping arithmetic expressions. The following definitions
4324 are correct for most assemblers:
4326 #define ASM_OPEN_PAREN "("
4327 #define ASM_CLOSE_PAREN ")" */
4328 #define ASM_OPEN_PAREN "("
4329 #define ASM_CLOSE_PAREN ")"
4331 /* These macros are provided by `real.h' for writing the definitions of
4332 `ASM_OUTPUT_DOUBLE' and the like: */
4334 /* These translate X, of type `REAL_VALUE_TYPE', to the target's floating point
4335 representation, and store its bit pattern in the array of `long int' whose
4336 address is L. The number of elements in the output array is determined by
4337 the size of the desired target floating point data type: 32 bits of it go in
4338 each `long int' array element. Each array element holds 32 bits of the
4339 result, even if `long int' is wider than 32 bits on the host machine.
4341 The array element values are designed so that you can print them out using
4342 `fprintf' in the order they should appear in the target machine's memory. */
4343 /* #define REAL_VALUE_TO_TARGET_SINGLE(X, L) */
4344 /* #define REAL_VALUE_TO_TARGET_DOUBLE(X, L) */
4345 /* #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(X, L) */
4347 /* This macro converts X, of type `REAL_VALUE_TYPE', to a decimal number and
4348 stores it as a string into STRING. You must pass, as STRING, the address of
4349 a long enough block of space to hold the result.
4351 The argument FORMAT is a `printf'-specification that serves as a suggestion
4352 for how to format the output string. */
4353 /* #define REAL_VALUE_TO_DECIMAL(X, FORMAT, STRING) */
4356 /* Output of Uninitialized Variables. */
4358 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4359 assembler definition of a common-label named NAME whose size is SIZE bytes.
4360 The variable ROUNDED is the size rounded up to whatever alignment the caller
4363 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
4364 before and after that, output the additional assembler syntax for defining
4365 the name, and a newline.
4367 This macro controls how the assembler definitions of uninitialized global
4368 variables are output. */
4369 /* #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) */
4371 /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a separate,
4372 explicit argument. If you define this macro, it is used in place of
4373 `ASM_OUTPUT_COMMON', and gives you more flexibility in handling the required
4374 alignment of the variable. The alignment is specified as the number of
4377 Defined in svr4.h. */
4378 /* #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGNMENT) */
4380 /* Like ASM_OUTPUT_ALIGNED_COMMON except that it takes an additional argument -
4381 the DECL of the variable to be output, if there is one. This macro can be
4382 called with DECL == NULL_TREE. If you define this macro, it is used in
4383 place of both ASM_OUTPUT_COMMON and ASM_OUTPUT_ALIGNED_COMMON, and gives you
4384 more flexibility in handling the destination of the variable. */
4385 /* #define ASM_OUTPUT_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4387 /* If defined, it is similar to `ASM_OUTPUT_COMMON', except that it is used
4388 when NAME is shared. If not defined, `ASM_OUTPUT_COMMON' will be used. */
4389 /* #define ASM_OUTPUT_SHARED_COMMON(STREAM, NAME, SIZE, ROUNDED) */
4391 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4392 assembler definition of uninitialized global DECL named NAME whose size is
4393 SIZE bytes. The variable ROUNDED is the size rounded up to whatever
4394 alignment the caller wants.
4396 Try to use function `asm_output_bss' defined in `varasm.c' when defining
4397 this macro. If unable, use the expression `assemble_name (STREAM, NAME)' to
4398 output the name itself; before and after that, output the additional
4399 assembler syntax for defining the name, and a newline.
4401 This macro controls how the assembler definitions of uninitialized global
4402 variables are output. This macro exists to properly support languages like
4403 `c++' which do not have `common' data. However, this macro currently is not
4404 defined for all targets. If this macro and `ASM_OUTPUT_ALIGNED_BSS' are not
4405 defined then `ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or
4406 `ASM_OUTPUT_DECL_COMMON' is used. */
4407 /* #define ASM_OUTPUT_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
4409 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate,
4410 explicit argument. If you define this macro, it is used in place of
4411 `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required
4412 alignment of the variable. The alignment is specified as the number of
4415 Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when
4416 defining this macro. */
4417 /* #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4419 /* If defined, it is similar to `ASM_OUTPUT_BSS', except that it is used when
4420 NAME is shared. If not defined, `ASM_OUTPUT_BSS' will be used. */
4421 /* #define ASM_OUTPUT_SHARED_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
4423 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4424 assembler definition of a local-common-label named NAME whose size is SIZE
4425 bytes. The variable ROUNDED is the size rounded up to whatever alignment
4428 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
4429 before and after that, output the additional assembler syntax for defining
4430 the name, and a newline.
4432 This macro controls how the assembler definitions of uninitialized static
4433 variables are output. */
4434 /* #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) */
4436 /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a separate,
4437 explicit argument. If you define this macro, it is used in place of
4438 `ASM_OUTPUT_LOCAL', and gives you more flexibility in handling the required
4439 alignment of the variable. The alignment is specified as the number of
4442 Defined in svr4.h. */
4443 /* #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGNMENT) */
4445 /* Like `ASM_OUTPUT_ALIGNED_LOCAL' except that it takes an additional
4446 parameter - the DECL of variable to be output, if there is one.
4447 This macro can be called with DECL == NULL_TREE. If you define
4448 this macro, it is used in place of `ASM_OUTPUT_LOCAL' and
4449 `ASM_OUTPUT_ALIGNED_LOCAL', and gives you more flexibility in
4450 handling the destination of the variable. */
4451 /* #define ASM_OUTPUT_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4453 /* If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is used when
4454 NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will be used. */
4455 /* #define ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED) */
4458 /* Output and Generation of Labels. */
4460 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4461 assembler definition of a label named NAME. Use the expression
4462 `assemble_name (STREAM, NAME)' to output the name itself; before and after
4463 that, output the additional assembler syntax for defining the name, and a
4466 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
4468 assemble_name (STREAM, NAME); \
4469 fputs (":\n", STREAM); \
4472 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4473 necessary for declaring the name NAME of a function which is being defined.
4474 This macro is responsible for outputting the label definition (perhaps using
4475 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' tree node
4476 representing the function.
4478 If this macro is not defined, then the function name is defined in the usual
4479 manner as a label (by means of `ASM_OUTPUT_LABEL').
4481 Defined in svr4.h. */
4482 /* #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) */
4484 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4485 necessary for declaring the size of a function which is being defined. The
4486 argument NAME is the name of the function. The argument DECL is the
4487 `FUNCTION_DECL' tree node representing the function.
4489 If this macro is not defined, then the function size is not defined.
4491 Defined in svr4.h. */
4492 /* #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) */
4494 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4495 necessary for declaring the name NAME of an initialized variable which is
4496 being defined. This macro must output the label definition (perhaps using
4497 `ASM_OUTPUT_LABEL'). The argument DECL is the `VAR_DECL' tree node
4498 representing the variable.
4500 If this macro is not defined, then the variable name is defined in the usual
4501 manner as a label (by means of `ASM_OUTPUT_LABEL').
4503 Defined in svr4.h. */
4504 /* #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) */
4506 /* A C statement (sans semicolon) to finish up declaring a variable name once
4507 the compiler has processed its initializer fully and thus has had a chance
4508 to determine the size of an array when controlled by an initializer. This
4509 is used on systems where it's necessary to declare something about the size
4512 If you don't define this macro, that is equivalent to defining it to do
4515 Defined in svr4.h. */
4516 /* #define ASM_FINISH_DECLARE_OBJECT(STREAM, DECL, TOPLEVEL, ATEND) */
4518 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4519 commands that will make the label NAME global; that is, available for
4520 reference from other files. Use the expression `assemble_name (STREAM,
4521 NAME)' to output the name itself; before and after that, output the
4522 additional assembler syntax for making that name global, and a newline. */
4524 #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \
4526 fputs ("\t.globl ", STREAM); \
4527 assemble_name (STREAM, NAME); \
4528 fputs ("\n", STREAM); \
4531 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4532 commands that will make the label NAME weak; that is, available for
4533 reference from other files but only used if no other definition is
4534 available. Use the expression `assemble_name (STREAM, NAME)' to output the
4535 name itself; before and after that, output the additional assembler syntax
4536 for making that name weak, and a newline.
4538 If you don't define this macro, GNU CC will not support weak symbols and you
4539 should not define the `SUPPORTS_WEAK' macro.
4541 Defined in svr4.h. */
4542 /* #define ASM_WEAKEN_LABEL */
4544 /* A C expression which evaluates to true if the target supports weak symbols.
4546 If you don't define this macro, `defaults.h' provides a default definition.
4547 If `ASM_WEAKEN_LABEL' is defined, the default definition is `1'; otherwise,
4548 it is `0'. Define this macro if you want to control weak symbol support
4549 with a compiler flag such as `-melf'. */
4550 /* #define SUPPORTS_WEAK */
4552 /* A C statement (sans semicolon) to mark DECL to be emitted as a
4553 public symbol such that extra copies in multiple translation units
4554 will be discarded by the linker. Define this macro if your object
4555 file format provides support for this concept, such as the `COMDAT'
4556 section flags in the Microsoft Windows PE/COFF format, and this
4557 support requires changes to DECL, such as putting it in a separate
4560 Defined in svr4.h. */
4561 /* #define MAKE_DECL_ONE_ONLY */
4563 /* A C expression which evaluates to true if the target supports one-only
4566 If you don't define this macro, `varasm.c' provides a default definition.
4567 If `MAKE_DECL_ONE_ONLY' is defined, the default definition is `1';
4568 otherwise, it is `0'. Define this macro if you want to control one-only
4569 symbol support with a compiler flag, or if setting the `DECL_ONE_ONLY' flag
4570 is enough to mark a declaration to be emitted as one-only. */
4571 /* #define SUPPORTS_ONE_ONLY */
4573 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4574 necessary for declaring the name of an external symbol named NAME which is
4575 referenced in this compilation but not defined. The value of DECL is the
4576 tree node for the declaration.
4578 This macro need not be defined if it does not need to output anything. The
4579 GNU assembler and most Unix assemblers don't require anything. */
4580 /* #define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) */
4582 /* A C statement (sans semicolon) to output on STREAM an assembler pseudo-op to
4583 declare a library function name external. The name of the library function
4584 is given by SYMREF, which has type `rtx' and is a `symbol_ref'.
4586 This macro need not be defined if it does not need to output anything. The
4587 GNU assembler and most Unix assemblers don't require anything.
4589 Defined in svr4.h. */
4590 /* #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM, SYMREF) */
4592 /* A C statement (sans semicolon) to output to the stdio stream STREAM a
4593 reference in assembler syntax to a label named NAME. This should add `_' to
4594 the front of the name, if that is customary on your operating system, as it
4595 is in most Berkeley Unix systems. This macro is used in `assemble_name'. */
4596 /* #define ASM_OUTPUT_LABELREF(STREAM, NAME) */
4598 /* A C statement to output to the stdio stream STREAM a label whose name is
4599 made from the string PREFIX and the number NUM.
4601 It is absolutely essential that these labels be distinct from the labels
4602 used for user-level functions and variables. Otherwise, certain programs
4603 will have name conflicts with internal labels.
4605 It is desirable to exclude internal labels from the symbol table of the
4606 object file. Most assemblers have a naming convention for labels that
4607 should be excluded; on many systems, the letter `L' at the beginning of a
4608 label has this effect. You should find out what convention your system
4609 uses, and follow it.
4611 The usual definition of this macro is as follows:
4613 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM)
4615 Defined in svr4.h. */
4616 /* #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) */
4618 /* A C statement to store into the string STRING a label whose name is made
4619 from the string PREFIX and the number NUM.
4621 This string, when output subsequently by `assemble_name', should produce the
4622 output that `ASM_OUTPUT_INTERNAL_LABEL' would produce with the same PREFIX
4625 If the string begins with `*', then `assemble_name' will output the rest of
4626 the string unchanged. It is often convenient for
4627 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the string doesn't
4628 start with `*', then `ASM_OUTPUT_LABELREF' gets to output the string, and
4629 may change it. (Of course, `ASM_OUTPUT_LABELREF' is also part of your
4630 machine description, so you should know what it does on your machine.)
4632 Defined in svr4.h. */
4635 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
4637 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
4641 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a
4642 newly allocated string made from the string NAME and the number NUMBER, with
4643 some suitable punctuation added. Use `alloca' to get space for the string.
4645 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce
4646 an assembler label for an internal static variable whose name is NAME.
4647 Therefore, the string must be such as to result in valid assembler code.
4648 The argument NUMBER is different each time this macro is executed; it
4649 prevents conflicts between similarly-named internal static variables in
4652 Ideally this string should not be a valid C identifier, to prevent any
4653 conflict with the user's own symbols. Most assemblers allow periods or
4654 percent signs in assembler symbols; putting at least one of these between
4655 the name and the number will suffice. */
4657 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \
4659 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \
4660 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \
4663 /* A C statement to output to the stdio stream STREAM assembler code which
4664 defines (equates) the symbol NAME to have the value VALUE.
4666 If SET_ASM_OP is defined, a default definition is provided which is correct
4669 Defined in svr4.h. */
4670 /* #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) */
4672 /* A C statement to output to the stdio stream STREAM assembler code which
4673 defines (equates) the weak symbol NAME to have the value VALUE.
4675 Define this macro if the target only supports weak aliases; define
4676 ASM_OUTPUT_DEF instead if possible. */
4677 /* #define ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE) */
4679 /* Define this macro to override the default assembler names used for Objective
4682 The default name is a unique method number followed by the name of the class
4683 (e.g. `_1_Foo'). For methods in categories, the name of the category is
4684 also included in the assembler name (e.g. `_1_Foo_Bar').
4686 These names are safe on most systems, but make debugging difficult since the
4687 method's selector is not present in the name. Therefore, particular systems
4688 define other ways of computing names.
4690 BUF is an expression of type `char *' which gives you a buffer in which to
4691 store the name; its length is as long as CLASS_NAME, CAT_NAME and SEL_NAME
4692 put together, plus 50 characters extra.
4694 The argument IS_INST specifies whether the method is an instance method or a
4695 class method; CLASS_NAME is the name of the class; CAT_NAME is the name of
4696 the category (or NULL if the method is not in a category); and SEL_NAME is
4697 the name of the selector.
4699 On systems where the assembler can handle quoted names, you can use this
4700 macro to provide more human-readable names. */
4701 /* #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME) */
4704 /* Macros Controlling Initialization Routines. */
4706 /* If defined, a C string constant for the assembler operation to identify the
4707 following data as initialization code. If not defined, GNU CC will assume
4708 such a section does not exist. When you are using special sections for
4709 initialization and termination functions, this macro also controls how
4710 `crtstuff.c' and `libgcc2.c' arrange to run the initialization functions.
4712 Defined in svr4.h. */
4713 /* #define INIT_SECTION_ASM_OP */
4714 #undef INIT_SECTION_ASM_OP
4716 /* If defined, `main' will not call `__main' as described above. This macro
4717 should be defined for systems that control the contents of the init section
4718 on a symbol-by-symbol basis, such as OSF/1, and should not be defined
4719 explicitly for systems that support `INIT_SECTION_ASM_OP'. */
4720 /* #define HAS_INIT_SECTION */
4722 /* If defined, a C string constant for a switch that tells the linker that the
4723 following symbol is an initialization routine. */
4724 /* #define LD_INIT_SWITCH */
4726 /* If defined, a C string constant for a switch that tells the linker that the
4727 following symbol is a finalization routine. */
4728 /* #define LD_FINI_SWITCH */
4730 /* If defined, `main' will call `__main' despite the presence of
4731 `INIT_SECTION_ASM_OP'. This macro should be defined for systems where the
4732 init section is not actually run automatically, but is still useful for
4733 collecting the lists of constructors and destructors. */
4734 #define INVOKE__main
4736 /* Define this macro as a C statement to output on the stream STREAM the
4737 assembler code to arrange to call the function named NAME at initialization
4740 Assume that NAME is the name of a C function generated automatically by the
4741 compiler. This function takes no arguments. Use the function
4742 `assemble_name' to output the name NAME; this performs any system-specific
4743 syntactic transformations such as adding an underscore.
4745 If you don't define this macro, nothing special is output to arrange to call
4746 the function. This is correct when the function will be called in some
4747 other manner--for example, by means of the `collect2' program, which looks
4748 through the symbol table to find these functions by their names.
4750 Defined in svr4.h. */
4751 /* #define ASM_OUTPUT_CONSTRUCTOR(STREAM, NAME) */
4753 /* This is like `ASM_OUTPUT_CONSTRUCTOR' but used for termination functions
4754 rather than initialization functions.
4756 Defined in svr4.h. */
4757 /* #define ASM_OUTPUT_DESTRUCTOR(STREAM, NAME) */
4759 /* If your system uses `collect2' as the means of processing constructors, then
4760 that program normally uses `nm' to scan an object file for constructor
4761 functions to be called. On certain kinds of systems, you can define these
4762 macros to make `collect2' work faster (and, in some cases, make it work at
4765 /* Define this macro if the system uses COFF (Common Object File Format) object
4766 files, so that `collect2' can assume this format and scan object files
4767 directly for dynamic constructor/destructor functions. */
4768 /* #define OBJECT_FORMAT_COFF */
4770 /* Define this macro if the system uses ROSE format object files, so that
4771 `collect2' can assume this format and scan object files directly for dynamic
4772 constructor/destructor functions.
4774 These macros are effective only in a native compiler; `collect2' as
4775 part of a cross compiler always uses `nm' for the target machine. */
4776 /* #define OBJECT_FORMAT_ROSE */
4778 /* Define this macro if the system uses ELF format object files.
4780 Defined in svr4.h. */
4781 /* #define OBJECT_FORMAT_ELF */
4783 /* Define this macro as a C string constant containing the file name to use to
4784 execute `nm'. The default is to search the path normally for `nm'.
4786 If your system supports shared libraries and has a program to list the
4787 dynamic dependencies of a given library or executable, you can define these
4788 macros to enable support for running initialization and termination
4789 functions in shared libraries: */
4790 /* #define REAL_NM_FILE_NAME */
4792 /* Define this macro to a C string constant containing the name of the program
4793 which lists dynamic dependencies, like `"ldd"' under SunOS 4. */
4794 /* #define LDD_SUFFIX */
4796 /* Define this macro to be C code that extracts filenames from the output of
4797 the program denoted by `LDD_SUFFIX'. PTR is a variable of type `char *'
4798 that points to the beginning of a line of output from `LDD_SUFFIX'. If the
4799 line lists a dynamic dependency, the code must advance PTR to the beginning
4800 of the filename on that line. Otherwise, it must set PTR to `NULL'. */
4801 /* #define PARSE_LDD_OUTPUT (PTR) */
4804 /* Output of Assembler Instructions. */
4806 /* A C initializer containing the assembler's names for the machine registers,
4807 each one as a C string constant. This is what translates register numbers
4808 in the compiler into assembler language. */
4809 #define REGISTER_NAMES \
4811 "r0", "r1", "r2", "r3", \
4812 "r4", "r5", "r6", "r7", \
4813 "r8", "r9", "r10", "r11", \
4814 "r12", "r13", "r14", "r15", \
4815 "r16", "r17", "r18", "r19", \
4816 "r20", "r21", "r22", "r23", \
4817 "r24", "r25", "r26", "r27", \
4818 "r28", "r29", "r30", "r31", \
4819 "r32", "r33", "r34", "r35", \
4820 "r36", "r37", "r38", "r39", \
4821 "r40", "r41", "r42", "r43", \
4822 "r44", "r45", "r46", "r47", \
4823 "r48", "r49", "r50", "r51", \
4824 "r52", "r53", "r54", "r55", \
4825 "r56", "r57", "r58", "r59", \
4826 "r60", "r61", "link", "sp", \
4828 "f0", "f1", "f2", "f3", \
4829 "s", "v", "va", "c", \
4831 "psw", "bpsw", "pc", "bpc", \
4832 "dpsw", "dpc", "rpt_c", "rpt_s", \
4833 "rpt_e", "mod_s", "mod_e", "iba", \
4834 "eit_vb", "int_s", "int_m", \
4837 /* If defined, a C initializer for an array of structures containing a name and
4838 a register number. This macro defines additional names for hard registers,
4839 thus allowing the `asm' option in declarations to refer to registers using
4841 #define ADDITIONAL_REGISTER_NAMES \
4843 {"r62", GPR_LINK}, \
4846 {"f5", FLAG_OVERFLOW}, \
4847 {"f6", FLAG_ACC_OVER}, \
4848 {"f7", FLAG_CARRY}, \
4849 {"carry", FLAG_CARRY}, \
4850 {"borrow", FLAG_BORROW}, \
4851 {"b", FLAG_BORROW}, \
4858 {"cr7", CR_RPT_C}, \
4859 {"cr8", CR_RPT_S}, \
4860 {"cr9", CR_RPT_E}, \
4861 {"cr10", CR_MOD_S}, \
4862 {"cr11", CR_MOD_E}, \
4864 {"cr15", CR_EIT_VB}, \
4865 {"cr16", CR_INT_S}, \
4866 {"cr17", CR_INT_M} \
4869 /* Define this macro if you are using an unusual assembler that requires
4870 different names for the machine instructions.
4872 The definition is a C statement or statements which output an assembler
4873 instruction opcode to the stdio stream STREAM. The macro-operand PTR is a
4874 variable of type `char *' which points to the opcode name in its "internal"
4875 form--the form that is written in the machine description. The definition
4876 should output the opcode name to STREAM, performing any translation you
4877 desire, and increment the variable PTR to point at the end of the opcode so
4878 that it will not be output twice.
4880 In fact, your macro definition may process less than the entire opcode name,
4881 or more than the opcode name; but if you want to process text that includes
4882 `%'-sequences to substitute operands, you must take care of the substitution
4883 yourself. Just be sure to increment PTR over whatever text should not be
4886 If you need to look at the operand values, they can be found as the elements
4887 of `recog_data.operand'.
4889 If the macro definition does nothing, the instruction is output in the usual
4891 /* #define ASM_OUTPUT_OPCODE(STREAM, PTR) */
4893 /* If defined, a C statement to be executed just prior to the output of
4894 assembler code for INSN, to modify the extracted operands so they will be
4897 Here the argument OPVEC is the vector containing the operands extracted from
4898 INSN, and NOPERANDS is the number of elements of the vector which contain
4899 meaningful data for this insn. The contents of this vector are what will be
4900 used to convert the insn template into assembler code, so you can change the
4901 assembler output by changing the contents of the vector.
4903 This macro is useful when various assembler syntaxes share a single file of
4904 instruction patterns; by defining this macro differently, you can cause a
4905 large class of instructions to be output differently (such as with
4906 rearranged operands). Naturally, variations in assembler syntax affecting
4907 individual insn patterns ought to be handled by writing conditional output
4908 routines in those patterns.
4910 If this macro is not defined, it is equivalent to a null statement. */
4911 /* #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) */
4913 /* If defined, `FINAL_PRESCAN_INSN' will be called on each
4914 `CODE_LABEL'. In that case, OPVEC will be a null pointer and
4915 NOPERANDS will be zero. */
4916 /* #define FINAL_PRESCAN_LABEL */
4918 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4919 for an instruction operand X. X is an RTL expression.
4921 CODE is a value that can be used to specify one of several ways of printing
4922 the operand. It is used when identical operands must be printed differently
4923 depending on the context. CODE comes from the `%' specification that was
4924 used to request printing of the operand. If the specification was just
4925 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
4926 the ASCII code for LTR.
4928 If X is a register, this macro should print the register's name. The names
4929 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
4930 is initialized from `REGISTER_NAMES'.
4932 When the machine description has a specification `%PUNCT' (a `%' followed by
4933 a punctuation character), this macro is called with a null pointer for X and
4934 the punctuation character for CODE.
4936 Standard operand flags that are handled elsewhere:
4937 `=' Output a number unique to each instruction in the compilation.
4938 `a' Substitute an operand as if it were a memory reference.
4939 `c' Omit the syntax that indicates an immediate operand.
4940 `l' Substitute a LABEL_REF into a jump instruction.
4941 `n' Like %cDIGIT, except negate the value before printing.
4943 The d30v specific operand flags are:
4945 `f' Print a SF constant as an int.
4946 `s' Subtract 32 and negate.
4947 `A' Print accumulator number without an `a' in front of it.
4948 `B' Print bit offset for BSET, etc. instructions.
4949 `E' Print u if this is zero extend, nothing if this is sign extend.
4950 `F' Emit /{f,t,x}{f,t,x} for executing a false condition.
4951 `L' Print the lower half of a 64 bit item.
4952 `M' Print a memory reference for ld/st instructions.
4953 `R' Return appropriate cmp instruction for relational test.
4955 `T' Emit /{f,t,x}{f,t,x} for executing a true condition.
4956 `U' Print the upper half of a 64 bit item. */
4958 #define PRINT_OPERAND(STREAM, X, CODE) d30v_print_operand (STREAM, X, CODE)
4960 /* A C expression which evaluates to true if CODE is a valid punctuation
4961 character for use in the `PRINT_OPERAND' macro. If
4962 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
4963 characters (except for the standard one, `%') are used in this way. */
4965 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '.' || (CODE) == ':')
4967 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4968 for an instruction operand that is a memory reference whose address is X. X
4969 is an RTL expression.
4971 On some machines, the syntax for a symbolic address depends on the section
4972 that the address refers to. On these machines, define the macro
4973 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
4974 then check for it here. *Note Assembler Format::. */
4976 #define PRINT_OPERAND_ADDRESS(STREAM, X) d30v_print_operand_address (STREAM, X)
4978 /* A C statement, to be executed after all slot-filler instructions have been
4979 output. If necessary, call `dbr_sequence_length' to determine the number of
4980 slots filled in a sequence (zero if not currently outputting a sequence), to
4981 decide how many no-ops to output, or whatever.
4983 Don't define this macro if it has nothing to do, but it is helpful in
4984 reading assembly output if the extent of the delay sequence is made explicit
4985 (e.g. with white space).
4987 Note that output routines for instructions with delay slots must be prepared
4988 to deal with not being output as part of a sequence (i.e. when the
4989 scheduling pass is not run, or when no slot fillers could be found.) The
4990 variable `final_sequence' is null when not processing a sequence, otherwise
4991 it contains the `sequence' rtx being output. */
4992 /* #define DBR_OUTPUT_SEQEND(FILE) */
4994 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
4995 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a
4996 single `md' file must support multiple assembler formats. In that case, the
4997 various `tm.h' files can define these macros differently.
4999 USER_LABEL_PREFIX is defined in svr4.h. */
5001 #define REGISTER_PREFIX "%"
5002 #define LOCAL_LABEL_PREFIX "."
5003 #define USER_LABEL_PREFIX ""
5004 #define IMMEDIATE_PREFIX ""
5006 /* If your target supports multiple dialects of assembler language (such as
5007 different opcodes), define this macro as a C expression that gives the
5008 numeric index of the assembler language dialect to use, with zero as the
5011 If this macro is defined, you may use `{option0|option1|option2...}'
5012 constructs in the output templates of patterns (*note Output Template::.) or
5013 in the first argument of `asm_fprintf'. This construct outputs `option0',
5014 `option1' or `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero,
5015 one or two, etc. Any special characters within these strings retain their
5018 If you do not define this macro, the characters `{', `|' and `}' do not have
5019 any special meaning when used in templates or operands to `asm_fprintf'.
5021 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
5022 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the variations
5023 in assemble language syntax with that mechanism. Define `ASSEMBLER_DIALECT'
5024 and use the `{option0|option1}' syntax if the syntax variant are larger and
5025 involve such things as different opcodes or operand order. */
5026 /* #define ASSEMBLER_DIALECT */
5028 /* A C expression to output to STREAM some assembler code which will push hard
5029 register number REGNO onto the stack. The code need not be optimal, since
5030 this macro is used only when profiling. */
5031 /* #define ASM_OUTPUT_REG_PUSH (STREAM, REGNO) */
5033 /* A C expression to output to STREAM some assembler code which will pop hard
5034 register number REGNO off of the stack. The code need not be optimal, since
5035 this macro is used only when profiling. */
5036 /* #define ASM_OUTPUT_REG_POP (STREAM, REGNO) */
5039 /* Output of dispatch tables. */
5041 /* This macro should be provided on machines where the addresses in a dispatch
5042 table are relative to the table's own address.
5044 The definition should be a C statement to output to the stdio stream STREAM
5045 an assembler pseudo-instruction to generate a difference between two labels.
5046 VALUE and REL are the numbers of two internal labels. The definitions of
5047 these labels are output using `ASM_OUTPUT_INTERNAL_LABEL', and they must be
5048 printed in the same way here. For example,
5050 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */
5052 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
5053 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL)
5055 /* This macro should be provided on machines where the addresses in a dispatch
5058 The definition should be a C statement to output to the stdio stream STREAM
5059 an assembler pseudo-instruction to generate a reference to a label. VALUE
5060 is the number of an internal label whose definition is output using
5061 `ASM_OUTPUT_INTERNAL_LABEL'. For example,
5063 fprintf (STREAM, "\t.word L%d\n", VALUE) */
5065 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
5066 fprintf (STREAM, "\t.word .L%d\n", VALUE)
5068 /* Define this if the label before a jump-table needs to be output specially.
5069 The first three arguments are the same as for `ASM_OUTPUT_INTERNAL_LABEL';
5070 the fourth argument is the jump-table which follows (a `jump_insn'
5071 containing an `addr_vec' or `addr_diff_vec').
5073 This feature is used on system V to output a `swbeg' statement for the
5076 If this macro is not defined, these labels are output with
5077 `ASM_OUTPUT_INTERNAL_LABEL'.
5079 Defined in svr4.h. */
5080 /* #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) */
5082 /* Define this if something special must be output at the end of a jump-table.
5083 The definition should be a C statement to be executed after the assembler
5084 code for the table is written. It should write the appropriate code to
5085 stdio stream STREAM. The argument TABLE is the jump-table insn, and NUM is
5086 the label-number of the preceding label.
5088 If this macro is not defined, nothing special is output at the end of the
5090 /* #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) */
5093 /* Assembler Commands for Exception Regions. */
5095 /* A C expression to output text to mark the start of an exception region.
5097 This macro need not be defined on most platforms. */
5098 /* #define ASM_OUTPUT_EH_REGION_BEG() */
5100 /* A C expression to output text to mark the end of an exception region.
5102 This macro need not be defined on most platforms. */
5103 /* #define ASM_OUTPUT_EH_REGION_END() */
5105 /* A C expression to switch to the section in which the main exception table is
5106 to be placed (*note Sections::.). The default is a section named
5107 `.gcc_except_table' on machines that support named sections via
5108 `ASM_OUTPUT_SECTION_NAME', otherwise if `-fpic' or `-fPIC' is in effect, the
5109 `data_section', otherwise the `readonly_data_section'. */
5110 /* #define EXCEPTION_SECTION() */
5112 /* If defined, a C string constant for the assembler operation to switch to the
5113 section for exception handling frame unwind information. If not defined,
5114 GNU CC will provide a default definition if the target supports named
5115 sections. `crtstuff.c' uses this macro to switch to the appropriate
5118 You should define this symbol if your target supports DWARF 2 frame unwind
5119 information and the default definition does not work. */
5120 /* #define EH_FRAME_SECTION_ASM_OP */
5122 /* A C expression that is nonzero if the normal exception table output should
5125 This macro need not be defined on most platforms. */
5126 /* #define OMIT_EH_TABLE() */
5128 /* Alternate runtime support for looking up an exception at runtime and finding
5129 the associated handler, if the default method won't work.
5131 This macro need not be defined on most platforms. */
5132 /* #define EH_TABLE_LOOKUP() */
5134 /* A C expression that decides whether or not the current function needs to
5135 have a function unwinder generated for it. See the file `except.c' for
5136 details on when to define this, and how. */
5137 /* #define DOESNT_NEED_UNWINDER */
5139 /* An rtx used to mask the return address found via RETURN_ADDR_RTX, so that it
5140 does not contain any extraneous set bits in it. */
5141 /* #define MASK_RETURN_ADDR */
5143 /* Define this macro to 0 if your target supports DWARF 2 frame unwind
5144 information, but it does not yet work with exception handling. Otherwise,
5145 if your target supports this information (if it defines
5146 `INCOMING_RETURN_ADDR_RTX' and either `UNALIGNED_INT_ASM_OP' or
5147 `OBJECT_FORMAT_ELF'), GCC will provide a default definition of 1.
5149 If this macro is defined to 1, the DWARF 2 unwinder will be the default
5150 exception handling mechanism; otherwise, setjmp/longjmp will be used by
5153 If this macro is defined to anything, the DWARF 2 unwinder will be used
5154 instead of inline unwinders and __unwind_function in the non-setjmp case. */
5155 /* #define DWARF2_UNWIND_INFO */
5158 /* Assembler Commands for Alignment. */
5160 /* The alignment (log base 2) to put in front of LABEL, which follows
5163 This macro need not be defined if you don't want any special alignment to be
5164 done at such a time. Most machine descriptions do not currently define the
5166 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */
5168 /* The desired alignment for the location counter at the beginning
5171 This macro need not be defined if you don't want any special alignment to be
5172 done at such a time. Most machine descriptions do not currently define the
5174 /* #define LOOP_ALIGN(LABEL) */
5176 /* A C statement to output to the stdio stream STREAM an assembler instruction
5177 to advance the location counter by NBYTES bytes. Those bytes should be zero
5178 when loaded. NBYTES will be a C expression of type `int'.
5180 Defined in svr4.h. */
5181 /* #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
5182 fprintf (STREAM, "\t.zero\t%u\n", (NBYTES)) */
5184 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text
5185 section because it fails put zeros in the bytes that are skipped. This is
5186 true on many Unix systems, where the pseudo-op to skip bytes produces no-op
5187 instructions rather than zeros when used in the text section. */
5188 /* #define ASM_NO_SKIP_IN_TEXT */
5190 /* A C statement to output to the stdio stream STREAM an assembler command to
5191 advance the location counter to a multiple of 2 to the POWER bytes. POWER
5192 will be a C expression of type `int'. */
5193 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
5194 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
5197 /* Macros Affecting all Debug Formats. */
5199 /* A C expression that returns the DBX register number for the compiler
5200 register number REGNO. In simple cases, the value of this expression may be
5201 REGNO itself. But sometimes there are some registers that the compiler
5202 knows about and DBX does not, or vice versa. In such cases, some register
5203 may need to have one number in the compiler and another for DBX.
5205 If two registers have consecutive numbers inside GNU CC, and they can be
5206 used as a pair to hold a multiword value, then they *must* have consecutive
5207 numbers after renumbering with `DBX_REGISTER_NUMBER'. Otherwise, debuggers
5208 will be unable to access such a pair, because they expect register pairs to
5209 be consecutive in their own numbering scheme.
5211 If you find yourself defining `DBX_REGISTER_NUMBER' in way that does not
5212 preserve register pairs, then what you must do instead is redefine the
5213 actual register numbering scheme. */
5214 #define DBX_REGISTER_NUMBER(REGNO) \
5215 (GPR_P (REGNO) ? ((REGNO) - GPR_FIRST) \
5216 : ACCUM_P (REGNO) ? ((REGNO) - ACCUM_FIRST + 84) \
5217 : FLAG_P (REGNO) ? 66 /* return psw for all flags */ \
5218 : (REGNO) == ARG_POINTER_REGNUM ? (GPR_SP - GPR_FIRST) \
5219 : (REGNO) == CR_PSW ? (66 + 0) \
5220 : (REGNO) == CR_BPSW ? (66 + 1) \
5221 : (REGNO) == CR_PC ? (66 + 2) \
5222 : (REGNO) == CR_BPC ? (66 + 3) \
5223 : (REGNO) == CR_DPSW ? (66 + 4) \
5224 : (REGNO) == CR_DPC ? (66 + 5) \
5225 : (REGNO) == CR_RPT_C ? (66 + 7) \
5226 : (REGNO) == CR_RPT_S ? (66 + 8) \
5227 : (REGNO) == CR_RPT_E ? (66 + 9) \
5228 : (REGNO) == CR_MOD_S ? (66 + 10) \
5229 : (REGNO) == CR_MOD_E ? (66 + 11) \
5230 : (REGNO) == CR_IBA ? (66 + 14) \
5231 : (REGNO) == CR_EIT_VB ? (66 + 15) \
5232 : (REGNO) == CR_INT_S ? (66 + 16) \
5233 : (REGNO) == CR_INT_M ? (66 + 17) \
5236 /* A C expression that returns the integer offset value for an automatic
5237 variable having address X (an RTL expression). The default computation
5238 assumes that X is based on the frame-pointer and gives the offset from the
5239 frame-pointer. This is required for targets that produce debugging output
5240 for DBX or COFF-style debugging output for SDB and allow the frame-pointer
5241 to be eliminated when the `-g' options is used. */
5242 /* #define DEBUGGER_AUTO_OFFSET(X) */
5244 /* A C expression that returns the integer offset value for an argument having
5245 address X (an RTL expression). The nominal offset is OFFSET. */
5246 /* #define DEBUGGER_ARG_OFFSET(OFFSET, X) */
5248 /* A C expression that returns the type of debugging output GNU CC produces
5249 when the user specifies `-g' or `-ggdb'. Define this if you have arranged
5250 for GNU CC to support more than one format of debugging output. Currently,
5251 the allowable values are `DBX_DEBUG', `SDB_DEBUG', `DWARF_DEBUG',
5252 `DWARF2_DEBUG', and `XCOFF_DEBUG'.
5254 The value of this macro only affects the default debugging output; the user
5255 can always get a specific type of output by using `-gstabs', `-gcoff',
5256 `-gdwarf-1', `-gdwarf-2', or `-gxcoff'.
5258 Defined in svr4.h. */
5260 #undef PREFERRED_DEBUGGING_TYPE
5261 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
5264 /* Specific Options for DBX Output. */
5266 /* Define this macro if GNU CC should produce debugging output for DBX in
5267 response to the `-g' option.
5269 Defined in svr4.h. */
5270 /* #define DBX_DEBUGGING_INFO */
5272 /* Define this macro if GNU CC should produce XCOFF format debugging output in
5273 response to the `-g' option. This is a variant of DBX format. */
5274 /* #define XCOFF_DEBUGGING_INFO */
5276 /* Define this macro to control whether GNU CC should by default generate GDB's
5277 extended version of DBX debugging information (assuming DBX-format debugging
5278 information is enabled at all). If you don't define the macro, the default
5279 is 1: always generate the extended information if there is any occasion to. */
5280 /* #define DEFAULT_GDB_EXTENSIONS */
5282 /* Define this macro if all `.stabs' commands should be output while in the
5284 /* #define DEBUG_SYMS_TEXT */
5286 /* A C string constant naming the assembler pseudo op to use instead of
5287 `.stabs' to define an ordinary debugging symbol. If you don't define this
5288 macro, `.stabs' is used. This macro applies only to DBX debugging
5289 information format. */
5290 /* #define ASM_STABS_OP */
5292 /* A C string constant naming the assembler pseudo op to use instead of
5293 `.stabd' to define a debugging symbol whose value is the current location.
5294 If you don't define this macro, `.stabd' is used. This macro applies only
5295 to DBX debugging information format. */
5296 /* #define ASM_STABD_OP */
5298 /* A C string constant naming the assembler pseudo op to use instead of
5299 `.stabn' to define a debugging symbol with no name. If you don't define
5300 this macro, `.stabn' is used. This macro applies only to DBX debugging
5301 information format. */
5302 /* #define ASM_STABN_OP */
5304 /* Define this macro if DBX on your system does not support the construct
5305 `xsTAGNAME'. On some systems, this construct is used to describe a forward
5306 reference to a structure named TAGNAME. On other systems, this construct is
5307 not supported at all. */
5308 /* #define DBX_NO_XREFS */
5310 /* A symbol name in DBX-format debugging information is normally continued
5311 (split into two separate `.stabs' directives) when it exceeds a certain
5312 length (by default, 80 characters). On some operating systems, DBX requires
5313 this splitting; on others, splitting must not be done. You can inhibit
5314 splitting by defining this macro with the value zero. You can override the
5315 default splitting-length by defining this macro as an expression for the
5316 length you desire. */
5317 /* #define DBX_CONTIN_LENGTH */
5319 /* Normally continuation is indicated by adding a `\' character to the end of a
5320 `.stabs' string when a continuation follows. To use a different character
5321 instead, define this macro as a character constant for the character you
5322 want to use. Do not define this macro if backslash is correct for your
5324 /* #define DBX_CONTIN_CHAR */
5326 /* Define this macro if it is necessary to go to the data section before
5327 outputting the `.stabs' pseudo-op for a non-global static variable. */
5328 /* #define DBX_STATIC_STAB_DATA_SECTION */
5330 /* The value to use in the "code" field of the `.stabs' directive for a
5331 typedef. The default is `N_LSYM'. */
5332 /* #define DBX_TYPE_DECL_STABS_CODE */
5334 /* The value to use in the "code" field of the `.stabs' directive for a static
5335 variable located in the text section. DBX format does not provide any
5336 "right" way to do this. The default is `N_FUN'. */
5337 /* #define DBX_STATIC_CONST_VAR_CODE */
5339 /* The value to use in the "code" field of the `.stabs' directive for a
5340 parameter passed in registers. DBX format does not provide any "right" way
5341 to do this. The default is `N_RSYM'. */
5342 /* #define DBX_REGPARM_STABS_CODE */
5344 /* The letter to use in DBX symbol data to identify a symbol as a parameter
5345 passed in registers. DBX format does not customarily provide any way to do
5346 this. The default is `'P''. */
5347 /* #define DBX_REGPARM_STABS_LETTER */
5349 /* The letter to use in DBX symbol data to identify a symbol as a stack
5350 parameter. The default is `'p''. */
5351 /* #define DBX_MEMPARM_STABS_LETTER */
5353 /* Define this macro if the DBX information for a function and its arguments
5354 should precede the assembler code for the function. Normally, in DBX
5355 format, the debugging information entirely follows the assembler code.
5357 Defined in svr4.h. */
5358 /* #define DBX_FUNCTION_FIRST */
5360 /* Define this macro if the `N_LBRAC' symbol for a block should precede the
5361 debugging information for variables and functions defined in that block.
5362 Normally, in DBX format, the `N_LBRAC' symbol comes first. */
5363 /* #define DBX_LBRAC_FIRST */
5365 /* Define this macro if the value of a symbol describing the scope of a block
5366 (`N_LBRAC' or `N_RBRAC') should be relative to the start of the enclosing
5367 function. Normally, GNU C uses an absolute address.
5369 Defined in svr4.h. */
5370 /* #define DBX_BLOCKS_FUNCTION_RELATIVE */
5372 /* Define this macro if GNU C should generate `N_BINCL' and `N_EINCL'
5373 stabs for included header files, as on Sun systems. This macro
5374 also directs GNU C to output a type number as a pair of a file
5375 number and a type number within the file. Normally, GNU C does not
5376 generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single
5377 number for a type number. */
5378 /* #define DBX_USE_BINCL */
5381 /* Open ended Hooks for DBX Output. */
5383 /* Define this macro to say how to output to STREAM the debugging information
5384 for the start of a scope level for variable names. The argument NAME is the
5385 name of an assembler symbol (for use with `assemble_name') whose value is
5386 the address where the scope begins. */
5387 /* #define DBX_OUTPUT_LBRAC(STREAM, NAME) */
5389 /* Like `DBX_OUTPUT_LBRAC', but for the end of a scope level. */
5390 /* #define DBX_OUTPUT_RBRAC(STREAM, NAME) */
5392 /* Define this macro if the target machine requires special handling to output
5393 an enumeration type. The definition should be a C statement (sans
5394 semicolon) to output the appropriate information to STREAM for the type
5396 /* #define DBX_OUTPUT_ENUM(STREAM, TYPE) */
5398 /* Define this macro if the target machine requires special output at the end
5399 of the debugging information for a function. The definition should be a C
5400 statement (sans semicolon) to output the appropriate information to STREAM.
5401 FUNCTION is the `FUNCTION_DECL' node for the function. */
5402 /* #define DBX_OUTPUT_FUNCTION_END(STREAM, FUNCTION) */
5404 /* Define this macro if you need to control the order of output of the standard
5405 data types at the beginning of compilation. The argument SYMS is a `tree'
5406 which is a chain of all the predefined global symbols, including names of
5409 Normally, DBX output starts with definitions of the types for integers and
5410 characters, followed by all the other predefined types of the particular
5411 language in no particular order.
5413 On some machines, it is necessary to output different particular types
5414 first. To do this, define `DBX_OUTPUT_STANDARD_TYPES' to output those
5415 symbols in the necessary order. Any predefined types that you don't
5416 explicitly output will be output afterward in no particular order.
5418 Be careful not to define this macro so that it works only for C. There are
5419 no global variables to access most of the built-in types, because another
5420 language may have another set of types. The way to output a particular type
5421 is to look through SYMS to see if you can find it. Here is an example:
5425 for (decl = syms; decl; decl = TREE_CHAIN (decl))
5426 if (!strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)),
5428 dbxout_symbol (decl);
5432 This does nothing if the expected type does not exist.
5434 See the function `init_decl_processing' in `c-decl.c' to find the names to
5435 use for all the built-in C types. */
5436 /* #define DBX_OUTPUT_STANDARD_TYPES(SYMS) */
5438 /* Some stabs encapsulation formats (in particular ECOFF), cannot
5439 handle the `.stabs "",N_FUN,,0,0,Lscope-function-1' gdb dbx
5440 extention construct. On those machines, define this macro to turn
5441 this feature off without disturbing the rest of the gdb extensions. */
5442 /* #define NO_DBX_FUNCTION_END */
5445 /* File names in DBX format. */
5447 /* Define this if DBX wants to have the current directory recorded in each
5450 Note that the working directory is always recorded if GDB extensions are
5452 /* #define DBX_WORKING_DIRECTORY */
5454 /* A C statement to output DBX debugging information to the stdio stream STREAM
5455 which indicates that file NAME is the main source file--the file specified
5456 as the input file for compilation. This macro is called only once, at the
5457 beginning of compilation.
5459 This macro need not be defined if the standard form of output for DBX
5460 debugging information is appropriate.
5462 Defined in svr4.h. */
5463 /* #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME) */
5465 /* A C statement to output DBX debugging information to the stdio stream STREAM
5466 which indicates that the current directory during compilation is named NAME.
5468 This macro need not be defined if the standard form of output for DBX
5469 debugging information is appropriate. */
5470 /* #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(STREAM, NAME) */
5472 /* A C statement to output DBX debugging information at the end of compilation
5473 of the main source file NAME.
5475 If you don't define this macro, nothing special is output at the end of
5476 compilation, which is correct for most machines. */
5477 /* #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(STREAM, NAME) */
5479 /* A C statement to output DBX debugging information to the stdio stream STREAM
5480 which indicates that file NAME is the current source file. This output is
5481 generated each time input shifts to a different source file as a result of
5482 `#include', the end of an included file, or a `#line' command.
5484 This macro need not be defined if the standard form of output for DBX
5485 debugging information is appropriate. */
5486 /* #define DBX_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
5489 /* Macros for SDB and Dwarf Output. */
5491 /* Define this macro if GNU CC should produce COFF-style debugging output for
5492 SDB in response to the `-g' option. */
5493 /* #define SDB_DEBUGGING_INFO */
5495 /* Define this macro if GNU CC should produce dwarf format debugging output in
5496 response to the `-g' option.
5498 Defined in svr4.h. */
5499 /* #define DWARF_DEBUGGING_INFO */
5501 /* Define this macro if GNU CC should produce dwarf version 2 format debugging
5502 output in response to the `-g' option.
5504 To support optional call frame debugging information, you must also define
5505 `INCOMING_RETURN_ADDR_RTX' and either set `RTX_FRAME_RELATED_P' on the
5506 prologue insns if you use RTL for the prologue, or call `dwarf2out_def_cfa'
5507 and `dwarf2out_reg_save' as appropriate from `FUNCTION_PROLOGUE' if you
5510 Defined in svr4.h. */
5511 /* #define DWARF2_DEBUGGING_INFO */
5513 /* Define these macros to override the assembler syntax for the special SDB
5514 assembler directives. See `sdbout.c' for a list of these macros and their
5515 arguments. If the standard syntax is used, you need not define them
5517 /* #define PUT_SDB_... */
5519 /* Some assemblers do not support a semicolon as a delimiter, even between SDB
5520 assembler directives. In that case, define this macro to be the delimiter
5521 to use (usually `\n'). It is not necessary to define a new set of
5522 `PUT_SDB_OP' macros if this is the only change required. */
5523 /* #define SDB_DELIM */
5525 /* Define this macro to override the usual method of constructing a dummy name
5526 for anonymous structure and union types. See `sdbout.c' for more
5528 /* #define SDB_GENERATE_FAKE */
5530 /* Define this macro to allow references to unknown structure, union, or
5531 enumeration tags to be emitted. Standard COFF does not allow handling of
5532 unknown references, MIPS ECOFF has support for it. */
5533 /* #define SDB_ALLOW_UNKNOWN_REFERENCES */
5535 /* Define this macro to allow references to structure, union, or enumeration
5536 tags that have not yet been seen to be handled. Some assemblers choke if
5537 forward tags are used, while some require it. */
5538 /* #define SDB_ALLOW_FORWARD_REFERENCES */
5541 /* Cross Compilation and Floating Point. */
5543 /* While all modern machines use 2's complement representation for integers,
5544 there are a variety of representations for floating point numbers. This
5545 means that in a cross-compiler the representation of floating point numbers
5546 in the compiled program may be different from that used in the machine doing
5549 Because different representation systems may offer different amounts of
5550 range and precision, the cross compiler cannot safely use the host machine's
5551 floating point arithmetic. Therefore, floating point constants must be
5552 represented in the target machine's format. This means that the cross
5553 compiler cannot use `atof' to parse a floating point constant; it must have
5554 its own special routine to use instead. Also, constant folding must emulate
5555 the target machine's arithmetic (or must not be done at all).
5557 The macros in the following table should be defined only if you are cross
5558 compiling between different floating point formats.
5560 Otherwise, don't define them. Then default definitions will be set up which
5561 use `double' as the data type, `==' to test for equality, etc.
5563 You don't need to worry about how many times you use an operand of any of
5564 these macros. The compiler never uses operands which have side effects. */
5566 /* A macro for the C data type to be used to hold a floating point value in the
5567 target machine's format. Typically this would be a `struct' containing an
5569 /* #define REAL_VALUE_TYPE */
5571 /* A macro for a C expression which compares for equality the two values, X and
5572 Y, both of type `REAL_VALUE_TYPE'. */
5573 /* #define REAL_VALUES_EQUAL(X, Y) */
5575 /* A macro for a C expression which tests whether X is less than Y, both values
5576 being of type `REAL_VALUE_TYPE' and interpreted as floating point numbers in
5577 the target machine's representation. */
5578 /* #define REAL_VALUES_LESS(X, Y) */
5580 /* A macro for a C expression which performs the standard library function
5581 `ldexp', but using the target machine's floating point representation. Both
5582 X and the value of the expression have type `REAL_VALUE_TYPE'. The second
5583 argument, SCALE, is an integer. */
5584 /* #define REAL_VALUE_LDEXP(X, SCALE) */
5586 /* A macro whose definition is a C expression to convert the target-machine
5587 floating point value X to a signed integer. X has type `REAL_VALUE_TYPE'. */
5588 /* #define REAL_VALUE_FIX(X) */
5590 /* A macro whose definition is a C expression to convert the target-machine
5591 floating point value X to an unsigned integer. X has type
5592 `REAL_VALUE_TYPE'. */
5593 /* #define REAL_VALUE_UNSIGNED_FIX(X) */
5595 /* A macro whose definition is a C expression to round the target-machine
5596 floating point value X towards zero to an integer value (but still as a
5597 floating point number). X has type `REAL_VALUE_TYPE', and so does the
5599 /* #define REAL_VALUE_RNDZINT(X) */
5601 /* A macro whose definition is a C expression to round the target-machine
5602 floating point value X towards zero to an unsigned integer value (but still
5603 represented as a floating point number). X has type `REAL_VALUE_TYPE', and
5604 so does the value. */
5605 /* #define REAL_VALUE_UNSIGNED_RNDZINT(X) */
5607 /* A macro for a C expression which converts STRING, an expression of type
5608 `char *', into a floating point number in the target machine's
5609 representation for mode MODE. The value has type `REAL_VALUE_TYPE'. */
5610 /* #define REAL_VALUE_ATOF(STRING, MODE) */
5612 /* Define this macro if infinity is a possible floating point value, and
5613 therefore division by 0 is legitimate. */
5614 /* #define REAL_INFINITY */
5616 /* A macro for a C expression which determines whether X, a floating point
5617 value, is infinity. The value has type `int'. By default, this is defined
5619 /* #define REAL_VALUE_ISINF(X) */
5621 /* A macro for a C expression which determines whether X, a floating point
5622 value, is a "nan" (not-a-number). The value has type `int'. By default,
5623 this is defined to call `isnan'. */
5624 /* #define REAL_VALUE_ISNAN(X) */
5626 /* Define the following additional macros if you want to make floating point
5627 constant folding work while cross compiling. If you don't define them,
5628 cross compilation is still possible, but constant folding will not happen
5629 for floating point values. */
5631 /* A macro for a C statement which calculates an arithmetic operation of the
5632 two floating point values X and Y, both of type `REAL_VALUE_TYPE' in the
5633 target machine's representation, to produce a result of the same type and
5634 representation which is stored in OUTPUT (which will be a variable).
5636 The operation to be performed is specified by CODE, a tree code which will
5637 always be one of the following: `PLUS_EXPR', `MINUS_EXPR', `MULT_EXPR',
5638 `RDIV_EXPR', `MAX_EXPR', `MIN_EXPR'.
5640 The expansion of this macro is responsible for checking for overflow. If
5641 overflow happens, the macro expansion should execute the statement `return
5642 0;', which indicates the inability to perform the arithmetic operation
5644 /* #define REAL_ARITHMETIC(OUTPUT, CODE, X, Y) */
5646 /* The real.h file actually defines REAL_ARITHMETIC appropriately if it was
5647 defined at all before entering into the code, by using #undef first. */
5648 #define REAL_ARITHMETIC
5650 /* A macro for a C expression which returns the negative of the floating point
5651 value X. Both X and the value of the expression have type `REAL_VALUE_TYPE'
5652 and are in the target machine's floating point representation.
5654 There is no way for this macro to report overflow, since overflow can't
5655 happen in the negation operation. */
5656 /* #define REAL_VALUE_NEGATE(X) */
5658 /* A macro for a C expression which converts the floating point value X to mode
5661 Both X and the value of the expression are in the target machine's floating
5662 point representation and have type `REAL_VALUE_TYPE'. However, the value
5663 should have an appropriate bit pattern to be output properly as a floating
5664 constant whose precision accords with mode MODE.
5666 There is no way for this macro to report overflow. */
5667 /* #define REAL_VALUE_TRUNCATE(MODE, X) */
5669 /* A macro for a C expression which converts a floating point value X into a
5670 double-precision integer which is then stored into LOW and HIGH, two
5671 variables of type INT. */
5672 /* #define REAL_VALUE_TO_INT(LOW, HIGH, X) */
5674 /* A macro for a C expression which converts a double-precision integer found
5675 in LOW and HIGH, two variables of type INT, into a floating point value
5676 which is then stored into X. */
5677 /* #define REAL_VALUE_FROM_INT(X, LOW, HIGH) */
5680 /* Miscellaneous Parameters. */
5682 /* Define this if you have defined special-purpose predicates in the file
5683 `MACHINE.c'. This macro is called within an initializer of an array of
5684 structures. The first field in the structure is the name of a predicate and
5685 the second field is an array of rtl codes. For each predicate, list all rtl
5686 codes that can be in expressions matched by the predicate. The list should
5687 have a trailing comma. Here is an example of two entries in the list for a
5688 typical RISC machine:
5690 #define PREDICATE_CODES \
5691 {"gen_reg_rtx_operand", {SUBREG, REG}}, \
5692 {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}},
5694 Defining this macro does not affect the generated code (however, incorrect
5695 definitions that omit an rtl code that may be matched by the predicate can
5696 cause the compiler to malfunction). Instead, it allows the table built by
5697 `genrecog' to be more compact and efficient, thus speeding up the compiler.
5698 The most important predicates to include in the list specified by this macro
5699 are thoses used in the most insn patterns. */
5701 #define PREDICATE_CODES \
5702 { "short_memory_operand", { MEM }}, \
5703 { "long_memory_operand", { MEM }}, \
5704 { "d30v_memory_operand", { MEM }}, \
5705 { "single_reg_memory_operand", { MEM }}, \
5706 { "const_addr_memory_operand", { MEM }}, \
5707 { "call_operand", { MEM }}, \
5708 { "gpr_operand", { REG, SUBREG }}, \
5709 { "accum_operand", { REG, SUBREG }}, \
5710 { "gpr_or_accum_operand", { REG, SUBREG }}, \
5711 { "cr_operand", { REG, SUBREG }}, \
5712 { "repeat_operand", { REG, SUBREG }}, \
5713 { "flag_operand", { REG, SUBREG }}, \
5714 { "br_flag_operand", { REG, SUBREG }}, \
5715 { "br_flag_or_constant_operand", { REG, SUBREG, CONST_INT }}, \
5716 { "gpr_or_br_flag_operand", { REG, SUBREG }}, \
5717 { "f0_operand", { REG, SUBREG }}, \
5718 { "f1_operand", { REG, SUBREG }}, \
5719 { "carry_operand", { REG, SUBREG }}, \
5720 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, \
5722 { "gpr_or_signed6_operand", { REG, SUBREG, CONST_INT }}, \
5723 { "gpr_or_unsigned5_operand", { REG, SUBREG, CONST_INT }}, \
5724 { "gpr_or_unsigned6_operand", { REG, SUBREG, CONST_INT }}, \
5725 { "gpr_or_constant_operand", { REG, SUBREG, CONST_INT, \
5726 CONST, SYMBOL_REF, \
5728 { "gpr_or_dbl_const_operand", { REG, SUBREG, CONST_INT, \
5729 CONST, SYMBOL_REF, \
5730 LABEL_REF, CONST_DOUBLE }}, \
5731 { "gpr_or_memory_operand", { REG, SUBREG, MEM }}, \
5732 { "move_input_operand", { REG, SUBREG, MEM, CONST_INT, \
5733 CONST, SYMBOL_REF, \
5734 LABEL_REF, CONST_DOUBLE }}, \
5735 { "move_output_operand", { REG, SUBREG, MEM }}, \
5736 { "signed6_operand", { CONST_INT }}, \
5737 { "unsigned5_operand", { CONST_INT }}, \
5738 { "unsigned6_operand", { CONST_INT }}, \
5739 { "bitset_operand", { CONST_INT }}, \
5740 { "condexec_test_operator", { EQ, NE }}, \
5741 { "condexec_branch_operator", { EQ, NE }}, \
5742 { "condexec_unary_operator", { ABS, NEG, NOT, ZERO_EXTEND }}, \
5743 { "condexec_addsub_operator", { PLUS, MINUS }}, \
5744 { "condexec_binary_operator", { MULT, AND, IOR, XOR, \
5745 ASHIFT, ASHIFTRT, LSHIFTRT, \
5746 ROTATE, ROTATERT }}, \
5747 { "condexec_shiftl_operator", { ASHIFT, ROTATE }}, \
5748 { "condexec_extend_operator", { SIGN_EXTEND, ZERO_EXTEND }}, \
5749 { "branch_zero_operator", { EQ, NE }}, \
5750 { "cond_move_dest_operand", { REG, SUBREG, MEM }}, \
5751 { "cond_move_operand", { REG, SUBREG, CONST_INT, \
5752 CONST, SYMBOL_REF, \
5753 LABEL_REF, MEM }}, \
5754 { "cond_exec_operand", { REG, SUBREG, CONST_INT, \
5755 CONST, SYMBOL_REF, \
5756 LABEL_REF, MEM }}, \
5757 { "srelational_si_operator", { EQ, NE, LT, LE, GT, GE }}, \
5758 { "urelational_si_operator", { LTU, LEU, GTU, GEU }}, \
5759 { "relational_di_operator", { EQ, NE, LT, LE, GT, GE, \
5760 LTU, LEU, GTU, GEU }},
5762 /* An alias for a machine mode name. This is the machine mode that elements of
5763 a jump-table should have. */
5764 #define CASE_VECTOR_MODE SImode
5766 /* Define as C expression which evaluates to nonzero if the tablejump
5767 instruction expects the table to contain offsets from the address of the
5769 Do not define this if the table should contain absolute addresses. */
5770 /* #define CASE_VECTOR_PC_RELATIVE 1 */
5772 /* Define this if control falls through a `case' insn when the index value is
5773 out of range. This means the specified default-label is actually ignored by
5774 the `case' insn proper. */
5775 /* #define CASE_DROPS_THROUGH */
5777 /* Define this to be the smallest number of different values for which it is
5778 best to use a jump-table instead of a tree of conditional branches. The
5779 default is four for machines with a `casesi' instruction and five otherwise.
5780 This is best for most machines. */
5781 /* #define CASE_VALUES_THRESHOLD */
5783 /* Define this macro if operations between registers with integral mode smaller
5784 than a word are always performed on the entire register. Most RISC machines
5785 have this property and most CISC machines do not. */
5786 #define WORD_REGISTER_OPERATIONS 1
5788 /* Define this macro to be a C expression indicating when insns that read
5789 memory in MODE, an integral mode narrower than a word, set the bits outside
5790 of MODE to be either the sign-extension or the zero-extension of the data
5791 read. Return `SIGN_EXTEND' for values of MODE for which the insn
5792 sign-extends, `ZERO_EXTEND' for which it zero-extends, and `NIL' for other
5795 This macro is not called with MODE non-integral or with a width greater than
5796 or equal to `BITS_PER_WORD', so you may return any value in this case. Do
5797 not define this macro if it would always return `NIL'. On machines where
5798 this macro is defined, you will normally define it as the constant
5799 `SIGN_EXTEND' or `ZERO_EXTEND'. */
5801 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND
5803 /* Define if loading short immediate values into registers sign extends. */
5804 #define SHORT_IMMEDIATES_SIGN_EXTEND
5806 /* An alias for a tree code that should be used by default for conversion of
5807 floating point values to fixed point. Normally, `FIX_ROUND_EXPR' is used. */
5808 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
5810 /* Define this macro if the same instructions that convert a floating point
5811 number to a signed fixed point number also convert validly to an unsigned
5813 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
5815 /* An alias for a tree code that is the easiest kind of division to compile
5816 code for in the general case. It may be `TRUNC_DIV_EXPR', `FLOOR_DIV_EXPR',
5817 `CEIL_DIV_EXPR' or `ROUND_DIV_EXPR'. These four division operators differ
5818 in how they round the result to an integer. `EASY_DIV_EXPR' is used when it
5819 is permissible to use any of those kinds of division and the choice should
5820 be made on the basis of efficiency. */
5821 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
5823 /* The maximum number of bytes that a single instruction can move quickly from
5824 memory to memory. */
5827 /* The maximum number of bytes that a single instruction can move quickly from
5828 memory to memory. If this is undefined, the default is `MOVE_MAX'.
5829 Otherwise, it is the constant value that is the largest value that
5830 `MOVE_MAX' can have at run-time. */
5831 /* #define MAX_MOVE_MAX */
5833 /* A C expression that is nonzero if on this machine the number of bits
5834 actually used for the count of a shift operation is equal to the number of
5835 bits needed to represent the size of the object being shifted. When this
5836 macro is non-zero, the compiler will assume that it is safe to omit a
5837 sign-extend, zero-extend, and certain bitwise `and' instructions that
5838 truncates the count of a shift operation. On machines that have
5839 instructions that act on bitfields at variable positions, which may include
5840 `bit test' instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables
5841 deletion of truncations of the values that serve as arguments to bitfield
5844 If both types of instructions truncate the count (for shifts) and position
5845 (for bitfield operations), or if no variable-position bitfield instructions
5846 exist, you should define this macro.
5848 However, on some machines, such as the 80386 and the 680x0, truncation only
5849 applies to shift operations and not the (real or pretended) bitfield
5850 operations. Define `SHIFT_COUNT_TRUNCATED' to be zero on such machines.
5851 Instead, add patterns to the `md' file that include the implied truncation
5852 of the shift instructions.
5854 You need not define this macro if it would always have the value of zero. */
5855 /* #define SHIFT_COUNT_TRUNCATED */
5857 /* A C expression which is nonzero if on this machine it is safe to "convert"
5858 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
5859 than INPREC) by merely operating on it as if it had only OUTPREC bits.
5861 On many machines, this expression can be 1.
5863 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
5864 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the
5865 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
5867 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
5869 /* A C expression describing the value returned by a comparison operator with
5870 an integral mode and stored by a store-flag instruction (`sCOND') when the
5871 condition is true. This description must apply to *all* the `sCOND'
5872 patterns and all the comparison operators whose results have a `MODE_INT'
5875 A value of 1 or -1 means that the instruction implementing the comparison
5876 operator returns exactly 1 or -1 when the comparison is true and 0 when the
5877 comparison is false. Otherwise, the value indicates which bits of the
5878 result are guaranteed to be 1 when the comparison is true. This value is
5879 interpreted in the mode of the comparison operation, which is given by the
5880 mode of the first operand in the `sCOND' pattern. Either the low bit or the
5881 sign bit of `STORE_FLAG_VALUE' be on. Presently, only those bits are used
5884 If `STORE_FLAG_VALUE' is neither 1 or -1, the compiler will generate code
5885 that depends only on the specified bits. It can also replace comparison
5886 operators with equivalent operations if they cause the required bits to be
5887 set, even if the remaining bits are undefined. For example, on a machine
5888 whose comparison operators return an `SImode' value and where
5889 `STORE_FLAG_VALUE' is defined as `0x80000000', saying that just the sign bit
5890 is relevant, the expression
5892 (ne:SI (and:SI X (const_int POWER-OF-2)) (const_int 0))
5896 (ashift:SI X (const_int N))
5898 where N is the appropriate shift count to move the bit being tested into the
5901 There is no way to describe a machine that always sets the low-order bit for
5902 a true value, but does not guarantee the value of any other bits, but we do
5903 not know of any machine that has such an instruction. If you are trying to
5904 port GNU CC to such a machine, include an instruction to perform a
5905 logical-and of the result with 1 in the pattern for the comparison operators
5906 and let us know (*note How to Report Bugs: Bug Reporting.).
5908 Often, a machine will have multiple instructions that obtain a value from a
5909 comparison (or the condition codes). Here are rules to guide the choice of
5910 value for `STORE_FLAG_VALUE', and hence the instructions to be used:
5912 * Use the shortest sequence that yields a valid definition for
5913 `STORE_FLAG_VALUE'. It is more efficient for the compiler to
5914 "normalize" the value (convert it to, e.g., 1 or 0) than for
5915 the comparison operators to do so because there may be
5916 opportunities to combine the normalization with other
5919 * For equal-length sequences, use a value of 1 or -1, with -1
5920 being slightly preferred on machines with expensive jumps and
5921 1 preferred on other machines.
5923 * As a second choice, choose a value of `0x80000001' if
5924 instructions exist that set both the sign and low-order bits
5925 but do not define the others.
5927 * Otherwise, use a value of `0x80000000'.
5929 Many machines can produce both the value chosen for `STORE_FLAG_VALUE' and
5930 its negation in the same number of instructions. On those machines, you
5931 should also define a pattern for those cases, e.g., one matching
5933 (set A (neg:M (ne:M B C)))
5935 Some machines can also perform `and' or `plus' operations on condition code
5936 values with less instructions than the corresponding `sCOND' insn followed
5937 by `and' or `plus'. On those machines, define the appropriate patterns.
5938 Use the names `incscc' and `decscc', respectively, for the the patterns
5939 which perform `plus' or `minus' operations on condition code values. See
5940 `rs6000.md' for some examples. The GNU Superoptizer can be used to find
5941 such instruction sequences on other machines.
5943 You need not define `STORE_FLAG_VALUE' if the machine has no store-flag
5945 /* #define STORE_FLAG_VALUE */
5947 /* A C expression that gives a non-zero floating point value that is returned
5948 when comparison operators with floating-point results are true. Define this
5949 macro on machine that have comparison operations that return floating-point
5950 values. If there are no such operations, do not define this macro. */
5951 /* #define FLOAT_STORE_FLAG_VALUE */
5953 /* An alias for the machine mode for pointers. On most machines, define this
5954 to be the integer mode corresponding to the width of a hardware pointer;
5955 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
5956 you must define this to be one of the partial integer modes, such as
5959 The width of `Pmode' must be at least as large as the value of
5960 `POINTER_SIZE'. If it is not equal, you must define the macro
5961 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
5962 #define Pmode SImode
5964 /* An alias for the machine mode used for memory references to functions being
5965 called, in `call' RTL expressions. On most machines this should be
5967 #define FUNCTION_MODE QImode
5969 /* A C expression for the maximum number of instructions above which the
5970 function DECL should not be inlined. DECL is a `FUNCTION_DECL' node.
5972 The default definition of this macro is 64 plus 8 times the number of
5973 arguments that the function accepts. Some people think a larger threshold
5974 should be used on RISC machines. */
5975 /* #define INTEGRATE_THRESHOLD(DECL) */
5977 /* Define this if the preprocessor should ignore `#sccs' directives and print
5980 Defined in svr4.h. */
5981 /* #define SCCS_DIRECTIVE */
5983 /* Define this macro if the system header files support C++ as well as C. This
5984 macro inhibits the usual method of using system header files in C++, which
5985 is to pretend that the file's contents are enclosed in `extern "C" {...}'. */
5986 /* #define NO_IMPLICIT_EXTERN_C */
5988 /* Define this macro to handle System V style pragmas (particularly #pack).
5990 Defined in svr4.h. */
5991 #define HANDLE_SYSV_PRAGMA
5993 /* Define this macro if you want to handle #pragma weak (HANDLE_SYSV_PRAGMA
5994 must also be defined). */
5995 /* #define HANDLE_WEAK_PRAGMA */
5997 /* If defined, a C expression whose value is nonzero if IDENTIFIER with
5998 arguments ARGS is a valid machine specific attribute for DECL. The
5999 attributes in ATTRIBUTES have previously been assigned to DECL. */
6000 /* #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) */
6002 /* If defined, a C expression whose value is nonzero if IDENTIFIER with
6003 arguments ARGS is a valid machine specific attribute for TYPE. The
6004 attributes in ATTRIBUTES have previously been assigned to TYPE. */
6005 /* #define VALID_MACHINE_TYPE_ATTRIBUTE(TYPE, ATTRIBUTES, IDENTIFIER, ARGS) */
6007 /* If defined, a C expression whose value is zero if the attributes on TYPE1
6008 and TYPE2 are incompatible, one if they are compatible, and two if they are
6009 nearly compatible (which causes a warning to be generated). */
6010 /* #define COMP_TYPE_ATTRIBUTES(TYPE1, TYPE2) */
6012 /* If defined, a C statement that assigns default attributes to newly defined
6014 /* #define SET_DEFAULT_TYPE_ATTRIBUTES(TYPE) */
6016 /* Define this macro to control use of the character `$' in identifier names.
6017 The value should be 0, 1, or 2. 0 means `$' is not allowed by default; 1
6018 means it is allowed by default if `-traditional' is used; 2 means it is
6019 allowed by default provided `-ansi' is not used. 1 is the default; there is
6020 no need to define this macro in that case. */
6021 /* #define DOLLARS_IN_IDENTIFIERS */
6023 /* Define this macro if the assembler does not accept the character `$' in
6024 label names. By default constructors and destructors in G++ have `$' in the
6025 identifiers. If this macro is defined, `.' is used instead.
6027 Defined in svr4.h. */
6028 /* #define NO_DOLLAR_IN_LABEL */
6030 /* Define this macro if the assembler does not accept the character `.' in
6031 label names. By default constructors and destructors in G++ have names that
6032 use `.'. If this macro is defined, these names are rewritten to avoid `.'. */
6033 /* #define NO_DOT_IN_LABEL */
6035 /* Define this macro if the target system expects every program's `main'
6036 function to return a standard "success" value by default (if no other value
6037 is explicitly returned).
6039 The definition should be a C statement (sans semicolon) to generate the
6040 appropriate rtl instructions. It is used only when compiling the end of
6042 /* #define DEFAULT_MAIN_RETURN */
6044 /* Define this if your `exit' function needs to do something besides calling an
6045 external function `_cleanup' before terminating with `_exit'. The
6046 `EXIT_BODY' macro is only needed if netiher `HAVE_ATEXIT' nor
6047 `INIT_SECTION_ASM_OP' are defined. */
6048 /* #define EXIT_BODY */
6050 /* Define this macro as a C expression that is nonzero if it is safe for the
6051 delay slot scheduler to place instructions in the delay slot of INSN, even
6052 if they appear to use a resource set or clobbered in INSN. INSN is always a
6053 `jump_insn' or an `insn'; GNU CC knows that every `call_insn' has this
6054 behavior. On machines where some `insn' or `jump_insn' is really a function
6055 call and hence has this behavior, you should define this macro.
6057 You need not define this macro if it would always return zero. */
6058 /* #define INSN_SETS_ARE_DELAYED(INSN) */
6060 /* Define this macro as a C expression that is nonzero if it is safe for the
6061 delay slot scheduler to place instructions in the delay slot of INSN, even
6062 if they appear to set or clobber a resource referenced in INSN. INSN is
6063 always a `jump_insn' or an `insn'. On machines where some `insn' or
6064 `jump_insn' is really a function call and its operands are registers whose
6065 use is actually in the subroutine it calls, you should define this macro.
6066 Doing so allows the delay slot scheduler to move instructions which copy
6067 arguments into the argument registers into the delay slot of INSN.
6069 You need not define this macro if it would always return zero. */
6070 /* #define INSN_REFERENCES_ARE_DELAYED(INSN) */
6072 /* In rare cases, correct code generation requires extra machine dependent
6073 processing between the second jump optimization pass and delayed branch
6074 scheduling. On those machines, define this macro as a C statement to act on
6075 the code starting at INSN. */
6076 #define MACHINE_DEPENDENT_REORG(INSN) d30v_machine_dependent_reorg (INSN)
6078 /* Define this macro if in some cases global symbols from one translation unit
6079 may not be bound to undefined symbols in another translation unit without
6080 user intervention. For instance, under Microsoft Windows symbols must be
6081 explicitly imported from shared libraries (DLLs). */
6082 /* #define MULTIPLE_SYMBOL_SPACES */
6084 /* A C expression for the maximum number of instructions to execute via
6085 conditional execution instructions instead of a branch. A value of
6086 BRANCH_COST+1 is the default if the machine does not use cc0, and 1 if it
6088 #define MAX_CONDITIONAL_EXECUTE d30v_cond_exec
6090 #define D30V_DEFAULT_MAX_CONDITIONAL_EXECUTE 4
6092 /* Values of the -mcond-exec=n string. */
6093 extern int d30v_cond_exec
;
6094 extern const char *d30v_cond_exec_string
;
6096 /* Indicate how many instructions can be issued at the same time. */
6097 #define ISSUE_RATE 2
6099 #endif /* GCC_D30V_H */