1 /* Stormy16 cpu description.
2 Copyright (C) 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4 Contributed by Red Hat, Inc.
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Set up System V.4 (aka ELF) defaults. */
28 /* Driver configuration */
30 /* A C expression which determines whether the option `-CHAR' takes arguments.
31 The value should be the number of arguments that option takes-zero, for many
34 By default, this macro is defined to handle the standard options properly.
35 You need not define it unless you wish to add additional options which take
39 /* #define SWITCH_TAKES_ARG(CHAR) */
41 /* A C expression which determines whether the option `-NAME' takes arguments.
42 The value should be the number of arguments that option takes-zero, for many
43 options. This macro rather than `SWITCH_TAKES_ARG' is used for
44 multi-character option names.
46 By default, this macro is defined as `DEFAULT_WORD_SWITCH_TAKES_ARG', which
47 handles the standard options properly. You need not define
48 `WORD_SWITCH_TAKES_ARG' unless you wish to add additional options which take
49 arguments. Any redefinition should call `DEFAULT_WORD_SWITCH_TAKES_ARG' and
50 then check for additional options.
53 /* #define WORD_SWITCH_TAKES_ARG(NAME) */
55 /* A string-valued C expression which is nonempty if the linker needs a space
56 between the `-L' or `-o' option and its argument.
58 If this macro is not defined, the default value is 0. */
59 /* #define SWITCHES_NEED_SPACES "" */
61 /* A C string constant that tells the GNU CC driver program options to pass to
62 CPP. It can also specify how to translate options you give to GNU CC into
63 options for GNU CC to pass to the CPP.
65 Do not define this macro if it does not need to do anything. */
66 /* #define CPP_SPEC "" */
68 /* If this macro is defined, the preprocessor will not define the builtin macro
69 `__SIZE_TYPE__'. The macro `__SIZE_TYPE__' must then be defined by
72 This should be defined if `SIZE_TYPE' depends on target dependent flags
73 which are not accessible to the preprocessor. Otherwise, it should not be
75 /* #define NO_BUILTIN_SIZE_TYPE */
77 /* If this macro is defined, the preprocessor will not define the builtin macro
78 `__PTRDIFF_TYPE__'. The macro `__PTRDIFF_TYPE__' must then be defined by
81 This should be defined if `PTRDIFF_TYPE' depends on target dependent flags
82 which are not accessible to the preprocessor. Otherwise, it should not be
84 /* #define NO_BUILTIN_PTRDIFF_TYPE */
86 /* A C string constant that tells the GNU CC driver program options to pass to
87 CPP. By default, this macro is defined to pass the option
88 `-D__CHAR_UNSIGNED__' to CPP if `char' will be treated as `unsigned char' by
91 Do not define this macro unless you need to override the default definition. */
92 /* #if DEFAULT_SIGNED_CHAR
93 #define SIGNED_CHAR_SPEC "%{funsigned-char:-D__CHAR_UNSIGNED__}"
95 #define SIGNED_CHAR_SPEC "%{!fsigned-char:-D__CHAR_UNSIGNED__}"
98 /* A C string constant that tells the GNU CC driver program options to pass to
99 `cc1'. It can also specify how to translate options you give to GNU CC into
100 options for GNU CC to pass to the `cc1'.
102 Do not define this macro if it does not need to do anything. */
103 /* #define CC1_SPEC "" */
105 /* A C string constant that tells the GNU CC driver program options to pass to
106 `cc1plus'. It can also specify how to translate options you give to GNU CC
107 into options for GNU CC to pass to the `cc1plus'.
109 Do not define this macro if it does not need to do anything. */
110 /* #define CC1PLUS_SPEC "" */
112 /* A C string constant that tells the GNU CC driver program options to pass to
113 the assembler. It can also specify how to translate options you give to GNU
114 CC into options for GNU CC to pass to the assembler. See the file `sun3.h'
115 for an example of this.
117 Do not define this macro if it does not need to do anything.
119 Defined in svr4.h. */
122 /* A C string constant that tells the GNU CC driver program how to run any
123 programs which cleanup after the normal assembler. Normally, this is not
124 needed. See the file `mips.h' for an example of this.
126 Do not define this macro if it does not need to do anything.
128 Defined in svr4.h. */
129 /* #define ASM_FINAL_SPEC "" */
131 /* A C string constant that tells the GNU CC driver program options to pass to
132 the linker. It can also specify how to translate options you give to GNU CC
133 into options for GNU CC to pass to the linker.
135 Do not define this macro if it does not need to do anything.
137 Defined in svr4.h. */
138 /* #define LINK_SPEC "" */
140 /* Another C string constant used much like `LINK_SPEC'. The difference
141 between the two is that `LIB_SPEC' is used at the end of the command given
144 If this macro is not defined, a default is provided that loads the standard
145 C library from the usual place. See `gcc.c'.
147 Defined in svr4.h. */
149 #define LIB_SPEC "-( -lc %{msim:-lsim}%{!msim:-lnosys} -)"
151 /* Another C string constant that tells the GNU CC driver program how and when
152 to place a reference to `libgcc.a' into the linker command line. This
153 constant is placed both before and after the value of `LIB_SPEC'.
155 If this macro is not defined, the GNU CC driver provides a default that
156 passes the string `-lgcc' to the linker unless the `-shared' option is
158 /* #define LIBGCC_SPEC "" */
160 /* Another C string constant used much like `LINK_SPEC'. The difference
161 between the two is that `STARTFILE_SPEC' is used at the very beginning of
162 the command given to the linker.
164 If this macro is not defined, a default is provided that loads the standard
165 C startup file from the usual place. See `gcc.c'.
167 Defined in svr4.h. */
168 #undef STARTFILE_SPEC
169 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
171 /* Another C string constant used much like `LINK_SPEC'. The difference
172 between the two is that `ENDFILE_SPEC' is used at the very end of the
173 command given to the linker.
175 Do not define this macro if it does not need to do anything.
177 Defined in svr4.h. */
179 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
181 /* Define this macro if the driver program should find the library `libgcc.a'
182 itself and should not pass `-L' options to the linker. If you do not define
183 this macro, the driver program will pass the argument `-lgcc' to tell the
184 linker to do the search and will pass `-L' options to it. */
185 /* #define LINK_LIBGCC_SPECIAL */
187 /* Define this macro if the driver program should find the library `libgcc.a'.
188 If you do not define this macro, the driver program will pass the argument
189 `-lgcc' to tell the linker to do the search. This macro is similar to
190 `LINK_LIBGCC_SPECIAL', except that it does not affect `-L' options. */
191 /* #define LINK_LIBGCC_SPECIAL_1 */
193 /* Define this macro to provide additional specifications to put in the `specs'
194 file that can be used in various specifications like `CC1_SPEC'.
196 The definition should be an initializer for an array of structures,
197 containing a string constant, that defines the specification name, and a
198 string constant that provides the specification.
200 Do not define this macro if it does not need to do anything. */
201 /* #define EXTRA_SPECS {{}} */
203 /* Define this macro as a C expression for the initializer of an array of
204 string to tell the driver program which options are defaults for this target
205 and thus do not need to be handled specially when using `MULTILIB_OPTIONS'.
207 Do not define this macro if `MULTILIB_OPTIONS' is not defined in the target
208 makefile fragment or if none of the options listed in `MULTILIB_OPTIONS' are
210 /* #define MULTILIB_DEFAULTS {} */
212 /* Define this macro to tell `gcc' that it should only translate a `-B' prefix
213 into a `-L' linker option if the prefix indicates an absolute file name. */
214 /* #define RELATIVE_PREFIX_NOT_LINKDIR */
216 /* Define this macro as a C string constant if you wish to override the
217 standard choice of `/usr/local/lib/gcc-lib/' as the default prefix to try
218 when searching for the executable files of the compiler. */
219 /* #define STANDARD_EXEC_PREFIX "" */
221 /* If defined, this macro is an additional prefix to try after
222 `STANDARD_EXEC_PREFIX'. `MD_EXEC_PREFIX' is not searched when the `-b'
223 option is used, or the compiler is built as a cross compiler.
225 Defined in svr4.h for host compilers. */
226 /* #define MD_EXEC_PREFIX "" */
228 /* Define this macro as a C string constant if you wish to override the
229 standard choice of `/usr/local/lib/' as the default prefix to try when
230 searching for startup files such as `crt0.o'. */
231 /* #define STANDARD_STARTFILE_PREFIX "" */
233 /* If defined, this macro supplies an additional prefix to try after the
234 standard prefixes. `MD_EXEC_PREFIX' is not searched when the `-b' option is
235 used, or when the compiler is built as a cross compiler.
237 Defined in svr4.h for host compilers. */
238 /* #define MD_STARTFILE_PREFIX "" */
240 /* If defined, this macro supplies yet another prefix to try after the standard
241 prefixes. It is not searched when the `-b' option is used, or when the
242 compiler is built as a cross compiler. */
243 /* #define MD_STARTFILE_PREFIX_1 "" */
245 /* Define this macro as a C string constant if you with to set environment
246 variables for programs called by the driver, such as the assembler and
247 loader. The driver passes the value of this macro to `putenv' to initialize
248 the necessary environment variables. */
249 /* #define INIT_ENVIRONMENT "" */
251 /* Define this macro as a C string constant if you wish to override the
252 standard choice of `/usr/local/include' as the default prefix to try when
253 searching for local header files. `LOCAL_INCLUDE_DIR' comes before
254 `SYSTEM_INCLUDE_DIR' in the search order.
256 Cross compilers do not use this macro and do not search either
257 `/usr/local/include' or its replacement. */
258 /* #define LOCAL_INCLUDE_DIR "" */
260 /* Define this macro as a C string constant if you wish to specify a
261 system-specific directory to search for header files before the standard
262 directory. `SYSTEM_INCLUDE_DIR' comes before `STANDARD_INCLUDE_DIR' in the
265 Cross compilers do not use this macro and do not search the directory
267 /* #define SYSTEM_INCLUDE_DIR "" */
269 /* Define this macro as a C string constant if you wish to override the
270 standard choice of `/usr/include' as the default prefix to try when
271 searching for header files.
273 Cross compilers do not use this macro and do not search either
274 `/usr/include' or its replacement. */
275 /* #define STANDARD_INCLUDE_DIR "" */
277 /* Define this macro if you wish to override the entire default search path for
278 include files. The default search path includes `GCC_INCLUDE_DIR',
279 `LOCAL_INCLUDE_DIR', `SYSTEM_INCLUDE_DIR', `GPLUSPLUS_INCLUDE_DIR', and
280 `STANDARD_INCLUDE_DIR'. In addition, `GPLUSPLUS_INCLUDE_DIR' and
281 `GCC_INCLUDE_DIR' are defined automatically by `Makefile', and specify
282 private search areas for GCC. The directory `GPLUSPLUS_INCLUDE_DIR' is used
283 only for C++ programs.
285 The definition should be an initializer for an array of structures. Each
286 array element should have two elements: the directory name (a string
287 constant) and a flag for C++-only directories. Mark the end of the array
288 with a null element. For example, here is the definition used for VMS:
290 #define INCLUDE_DEFAULTS \
292 { "GNU_GXX_INCLUDE:", 1}, \
293 { "GNU_CC_INCLUDE:", 0}, \
294 { "SYS$SYSROOT:[SYSLIB.]", 0}, \
299 Here is the order of prefixes tried for exec files:
301 1. Any prefixes specified by the user with `-B'.
303 2. The environment variable `GCC_EXEC_PREFIX', if any.
305 3. The directories specified by the environment variable
308 4. The macro `STANDARD_EXEC_PREFIX'.
312 6. The macro `MD_EXEC_PREFIX', if any.
314 Here is the order of prefixes tried for startfiles:
316 1. Any prefixes specified by the user with `-B'.
318 2. The environment variable `GCC_EXEC_PREFIX', if any.
320 3. The directories specified by the environment variable
321 `LIBRARY_PATH' (native only, cross compilers do not use this).
323 4. The macro `STANDARD_EXEC_PREFIX'.
327 6. The macro `MD_EXEC_PREFIX', if any.
329 7. The macro `MD_STARTFILE_PREFIX', if any.
331 8. The macro `STANDARD_STARTFILE_PREFIX'.
336 /* #define INCLUDE_DEFAULTS {{ }} */
339 /* Run-time target specifications */
341 /* Define this to be a string constant containing `-D' options to define the
342 predefined macros that identify this machine and system. These macros will
343 be predefined unless the `-ansi' option is specified.
345 In addition, a parallel set of macros are predefined, whose names are made
346 by appending `__' at the beginning and at the end. These `__' macros are
347 permitted by the ANSI standard, so they are predefined regardless of whether
348 `-ansi' is specified.
350 For example, on the Sun, one can use the following value:
352 "-Dmc68000 -Dsun -Dunix"
354 The result is to define the macros `__mc68000__', `__sun__' and `__unix__'
355 unconditionally, and the macros `mc68000', `sun' and `unix' provided `-ansi'
357 #define CPP_PREDEFINES "-Dstormy16 -Amachine=stormy16 -D__INT_MAX__=32767"
359 /* This declaration should be present. */
360 extern int target_flags
;
362 /* This series of macros is to allow compiler command arguments to enable or
363 disable the use of optional features of the target machine. For example,
364 one machine description serves both the 68000 and the 68020; a command
365 argument tells the compiler whether it should use 68020-only instructions or
366 not. This command argument works by means of a macro `TARGET_68020' that
367 tests a bit in `target_flags'.
369 Define a macro `TARGET_FEATURENAME' for each such option. Its definition
370 should test a bit in `target_flags'; for example:
372 #define TARGET_68020 (target_flags & 1)
374 One place where these macros are used is in the condition-expressions of
375 instruction patterns. Note how `TARGET_68020' appears frequently in the
376 68000 machine description file, `m68k.md'. Another place they are used is
377 in the definitions of the other macros in the `MACHINE.h' file. */
378 /* #define TARGET_... */
380 /* This macro defines names of command options to set and clear bits in
381 `target_flags'. Its definition is an initializer with a subgrouping for
384 Each subgrouping contains a string constant, that defines the
385 option name, a number, which contains the bits to set in
386 `target_flags', and an optional second string which is the textual
387 description that will be displayed when the user passes --help on
388 the command line. If the number entry is negative then the
389 specified bits will be cleared instead of being set. If the second
390 string entry is present but empty, then no help information will be
391 displayed for that option, but it will not count as an undocumented
392 option. The actual option name, as seen on the command line is
393 made by appending `-m' to the specified name.
395 One of the subgroupings should have a null string. The number in this
396 grouping is the default value for `target_flags'. Any target options act
397 starting with that value.
399 Here is an example which defines `-m68000' and `-m68020' with opposite
400 meanings, and picks the latter as the default:
402 #define TARGET_SWITCHES \
403 { { "68020", 1, ""}, \
404 { "68000", -1, "Compile for the m68000"}, \
407 This declaration must be present. */
409 #define TARGET_SWITCHES \
410 {{ "sim", 0, "Provide libraries for the simulator" }, \
413 /* This macro is similar to `TARGET_SWITCHES' but defines names of command
414 options that have values. Its definition is an initializer with a
415 subgrouping for each command option.
417 Each subgrouping contains a string constant, that defines the fixed part of
418 the option name, the address of a variable, and an optional description string.
419 The variable, of type `char *', is set to the text following the fixed part of
420 the option as it is specified on the command line. The actual option name is
421 made by appending `-m' to the specified name.
423 Here is an example which defines `-mshort-data-NUMBER'. If the given option
424 is `-mshort-data-512', the variable `m88k_short_data' will be set to the
427 extern char *m88k_short_data;
428 #define TARGET_OPTIONS \
429 { { "short-data-", & m88k_short_data, \
430 "Specify the size of the short data section" } }
432 This declaration is optional. */
433 /* #define TARGET_OPTIONS */
435 /* This macro is a C statement to print on `stderr' a string describing the
436 particular machine description choice. Every machine description should
437 define `TARGET_VERSION'. For example:
440 #define TARGET_VERSION \
441 fprintf (stderr, " (68k, Motorola syntax)");
443 #define TARGET_VERSION \
444 fprintf (stderr, " (68k, MIT syntax)");
446 #define TARGET_VERSION fprintf (stderr, " (stormy16 cpu core)");
448 /* Sometimes certain combinations of command options do not make sense on a
449 particular target machine. You can define a macro `OVERRIDE_OPTIONS' to
450 take account of this. This macro, if defined, is executed once just after
451 all the command options have been parsed.
453 Don't use this macro to turn on various extra optimizations for `-O'. That
454 is what `OPTIMIZATION_OPTIONS' is for. */
455 /* #define OVERRIDE_OPTIONS */
457 /* Some machines may desire to change what optimizations are performed for
458 various optimization levels. This macro, if defined, is executed once just
459 after the optimization level is determined and before the remainder of the
460 command options have been parsed. Values set in this macro are used as the
461 default values for the other command line options.
463 LEVEL is the optimization level specified; 2 if `-O2' is specified, 1 if
464 `-O' is specified, and 0 if neither is specified.
466 SIZE is non-zero if `-Os' is specified, 0 otherwise.
468 You should not use this macro to change options that are not
469 machine-specific. These should uniformly selected by the same optimization
470 level on all supported machines. Use this macro to enable machbine-specific
473 *Do not examine `write_symbols' in this macro!* The debugging options are
474 *not supposed to alter the generated code. */
475 /* #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) */
477 /* Define this macro if debugging can be performed even without a frame
478 pointer. If this macro is defined, GNU CC will turn on the
479 `-fomit-frame-pointer' option whenever `-O' is specified. */
480 #define CAN_DEBUG_WITHOUT_FP
485 /* Define this macro to have the value 1 if the most significant bit in a byte
486 has the lowest number; otherwise define it to have the value zero. This
487 means that bit-field instructions count from the most significant bit. If
488 the machine has no bit-field instructions, then this must still be defined,
489 but it doesn't matter which value it is defined to. This macro need not be
492 This macro does not affect the way structure fields are packed into bytes or
493 words; that is controlled by `BYTES_BIG_ENDIAN'. */
494 #define BITS_BIG_ENDIAN 1
496 /* Define this macro to have the value 1 if the most significant byte in a word
497 has the lowest number. This macro need not be a constant. */
498 #define BYTES_BIG_ENDIAN 0
500 /* Define this macro to have the value 1 if, in a multiword object, the most
501 significant word has the lowest number. This applies to both memory
502 locations and registers; GNU CC fundamentally assumes that the order of
503 words in memory is the same as the order in registers. This macro need not
505 #define WORDS_BIG_ENDIAN 0
507 /* Define this macro if WORDS_BIG_ENDIAN is not constant. This must be a
508 constant value with the same meaning as WORDS_BIG_ENDIAN, which will be used
509 only when compiling libgcc2.c. Typically the value will be set based on
510 preprocessor defines. */
511 /* #define LIBGCC2_WORDS_BIG_ENDIAN */
513 /* Define this macro to have the value 1 if `DFmode', `XFmode' or `TFmode'
514 floating point numbers are stored in memory with the word containing the
515 sign bit at the lowest address; otherwise define it to have the value 0.
516 This macro need not be a constant.
518 You need not define this macro if the ordering is the same as for multi-word
520 /* #define FLOAT_WORDS_BIG_ENDIAN */
522 /* Define this macro to be the number of bits in an addressable storage unit
523 (byte); normally 8. */
524 #define BITS_PER_UNIT 8
526 /* Number of bits in a word; normally 32. */
527 #define BITS_PER_WORD 16
529 /* Maximum number of bits in a word. If this is undefined, the default is
530 `BITS_PER_WORD'. Otherwise, it is the constant value that is the largest
531 value that `BITS_PER_WORD' can have at run-time. */
532 /* #define MAX_BITS_PER_WORD */
534 /* Number of storage units in a word; normally 4. */
535 #define UNITS_PER_WORD 2
537 /* Minimum number of units in a word. If this is undefined, the default is
538 `UNITS_PER_WORD'. Otherwise, it is the constant value that is the smallest
539 value that `UNITS_PER_WORD' can have at run-time. */
540 /* #define MIN_UNITS_PER_WORD */
542 /* Width of a pointer, in bits. You must specify a value no wider than the
543 width of `Pmode'. If it is not equal to the width of `Pmode', you must
544 define `POINTERS_EXTEND_UNSIGNED'. */
545 #define POINTER_SIZE 16
547 /* A C expression whose value is nonzero if pointers that need to be extended
548 from being `POINTER_SIZE' bits wide to `Pmode' are sign-extended and zero if
549 they are zero-extended.
551 You need not define this macro if the `POINTER_SIZE' is equal to the width
553 /* #define POINTERS_EXTEND_UNSIGNED */
555 /* A macro to update MODE and UNSIGNEDP when an object whose type is TYPE and
556 which has the specified mode and signedness is to be stored in a register.
557 This macro is only called when TYPE is a scalar type.
559 On most RISC machines, which only have operations that operate on a full
560 register, define this macro to set M to `word_mode' if M is an integer mode
561 narrower than `BITS_PER_WORD'. In most cases, only integer modes should be
562 widened because wider-precision floating-point operations are usually more
563 expensive than their narrower counterparts.
565 For most machines, the macro definition does not change UNSIGNEDP. However,
566 some machines, have instructions that preferentially handle either signed or
567 unsigned quantities of certain modes. For example, on the DEC Alpha, 32-bit
568 loads from memory and 32-bit add instructions sign-extend the result to 64
569 bits. On such machines, set UNSIGNEDP according to which kind of extension
572 Do not define this macro if it would never modify MODE. */
573 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
575 if (GET_MODE_CLASS (MODE) == MODE_INT \
576 && GET_MODE_SIZE (MODE) < 2) \
580 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
581 be done for outgoing function arguments. */
582 #define PROMOTE_FUNCTION_ARGS 1
584 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
585 be done for the return value of functions.
587 If this macro is defined, `FUNCTION_VALUE' must perform the same promotions
588 done by `PROMOTE_MODE'. */
589 #define PROMOTE_FUNCTION_RETURN 1
591 /* Define this macro if the promotion described by `PROMOTE_MODE' should *only*
592 be performed for outgoing function arguments or function return values, as
593 specified by `PROMOTE_FUNCTION_ARGS' and `PROMOTE_FUNCTION_RETURN',
595 /* #define PROMOTE_FOR_CALL_ONLY */
597 /* Normal alignment required for function parameters on the stack, in bits.
598 All stack parameters receive at least this much alignment regardless of data
599 type. On most machines, this is the same as the size of an integer. */
600 #define PARM_BOUNDARY 16
602 /* Define this macro if you wish to preserve a certain alignment for the stack
603 pointer. The definition is a C expression for the desired alignment
606 If `PUSH_ROUNDING' is not defined, the stack will always be aligned to the
607 specified boundary. If `PUSH_ROUNDING' is defined and specifies a less
608 strict alignment than `STACK_BOUNDARY', the stack may be momentarily
609 unaligned while pushing arguments. */
610 #define STACK_BOUNDARY 16
612 /* Alignment required for a function entry point, in bits. */
613 #define FUNCTION_BOUNDARY 16
615 /* Biggest alignment that any data type can require on this machine,
617 #define BIGGEST_ALIGNMENT 16
619 /* Biggest alignment that any structure field can require on this machine, in
620 bits. If defined, this overrides `BIGGEST_ALIGNMENT' for structure fields
622 /* #define BIGGEST_FIELD_ALIGNMENT */
624 /* An expression for the alignment of a structure field FIELD if the
625 alignment computed in the usual way is COMPUTED. GNU CC uses this
626 value instead of the value in `BIGGEST_ALIGNMENT' or
627 `BIGGEST_FIELD_ALIGNMENT', if defined, for structure fields only. */
628 /* #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) */
630 /* Biggest alignment supported by the object file format of this machine. Use
631 this macro to limit the alignment which can be specified using the
632 `__attribute__ ((aligned (N)))' construct. If not defined, the default
633 value is `BIGGEST_ALIGNMENT'.
635 Defined in svr4.h. */
636 /* #define MAX_OFILE_ALIGNMENT */
638 /* If defined, a C expression to compute the alignment for a static variable.
639 TYPE is the data type, and ALIGN is the alignment that the object
640 would ordinarily have. The value of this macro is used instead of that
641 alignment to align the object.
643 If this macro is not defined, then ALIGN is used.
645 One use of this macro is to increase alignment of medium-size data to make
646 it all fit in fewer cache lines. Another is to cause character arrays to be
647 word-aligned so that `strcpy' calls that copy constants to character arrays
648 can be done inline. */
649 #define DATA_ALIGNMENT(TYPE, ALIGN) \
650 (TREE_CODE (TYPE) == ARRAY_TYPE \
651 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
652 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
654 /* If defined, a C expression to compute the alignment given to a constant that
655 is being placed in memory. CONSTANT is the constant and ALIGN is the
656 alignment that the object would ordinarily have. The value of this macro is
657 used instead of that alignment to align the object.
659 If this macro is not defined, then ALIGN is used.
661 The typical use of this macro is to increase alignment for string constants
662 to be word aligned so that `strcpy' calls that copy constants can be done
664 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
665 (TREE_CODE (EXP) == STRING_CST \
666 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
668 /* Alignment in bits to be given to a structure bit field that follows an empty
669 field such as `int : 0;'.
671 Note that `PCC_BITFIELD_TYPE_MATTERS' also affects the alignment that
672 results from an empty field. */
673 /* #define EMPTY_FIELD_BOUNDARY */
675 /* Number of bits which any structure or union's size must be a multiple of.
676 Each structure or union's size is rounded up to a multiple of this.
678 If you do not define this macro, the default is the same as `BITS_PER_UNIT'. */
679 /* #define STRUCTURE_SIZE_BOUNDARY */
681 /* Define this macro to be the value 1 if instructions will fail to work if
682 given data not on the nominal alignment. If instructions will merely go
683 slower in that case, define this macro as 0. */
684 #define STRICT_ALIGNMENT 1
686 /* Define this if you wish to imitate the way many other C compilers handle
687 alignment of bitfields and the structures that contain them.
689 The behavior is that the type written for a bitfield (`int', `short', or
690 other integer type) imposes an alignment for the entire structure, as if the
691 structure really did contain an ordinary field of that type. In addition,
692 the bitfield is placed within the structure so that it would fit within such
693 a field, not crossing a boundary for it.
695 Thus, on most machines, a bitfield whose type is written as `int' would not
696 cross a four-byte boundary, and would force four-byte alignment for the
697 whole structure. (The alignment used may not be four bytes; it is
698 controlled by the other alignment parameters.)
700 If the macro is defined, its definition should be a C expression; a nonzero
701 value for the expression enables this behavior.
703 Note that if this macro is not defined, or its value is zero, some bitfields
704 may cross more than one alignment boundary. The compiler can support such
705 references if there are `insv', `extv', and `extzv' insns that can directly
708 The other known way of making bitfields work is to define
709 `STRUCTURE_SIZE_BOUNDARY' as large as `BIGGEST_ALIGNMENT'. Then every
710 structure can be accessed with fullwords.
712 Unless the machine has bitfield instructions or you define
713 `STRUCTURE_SIZE_BOUNDARY' that way, you must define
714 `PCC_BITFIELD_TYPE_MATTERS' to have a nonzero value.
716 If your aim is to make GNU CC use the same conventions for laying out
717 bitfields as are used by another compiler, here is how to investigate what
718 the other compiler does. Compile and run this program:
736 printf ("Size of foo1 is %d\n",
737 sizeof (struct foo1));
738 printf ("Size of foo2 is %d\n",
739 sizeof (struct foo2));
743 If this prints 2 and 5, then the compiler's behavior is what you would get
744 from `PCC_BITFIELD_TYPE_MATTERS'.
746 Defined in svr4.h. */
747 #define PCC_BITFIELD_TYPE_MATTERS 1
749 /* Like PCC_BITFIELD_TYPE_MATTERS except that its effect is limited to aligning
750 a bitfield within the structure. */
751 /* #define BITFIELD_NBYTES_LIMITED */
753 /* Define this macro as an expression for the overall size of a structure
754 (given by STRUCT as a tree node) when the size computed from the fields is
755 SIZE and the alignment is ALIGN.
757 The default is to round SIZE up to a multiple of ALIGN. */
758 /* #define ROUND_TYPE_SIZE(STRUCT, SIZE, ALIGN) */
760 /* Define this macro as an expression for the alignment of a structure (given
761 by STRUCT as a tree node) if the alignment computed in the usual way is
762 COMPUTED and the alignment explicitly specified was SPECIFIED.
764 The default is to use SPECIFIED if it is larger; otherwise, use the smaller
765 of COMPUTED and `BIGGEST_ALIGNMENT' */
766 /* #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) */
768 /* An integer expression for the size in bits of the largest integer machine
769 mode that should actually be used. All integer machine modes of this size
770 or smaller can be used for structures and unions with the appropriate sizes.
771 If this macro is undefined, `GET_MODE_BITSIZE (DImode)' is assumed. */
772 /* #define MAX_FIXED_MODE_SIZE */
774 /* A C statement to validate the value VALUE (of type `double') for mode MODE.
775 This means that you check whether VALUE fits within the possible range of
776 values for mode MODE on this target machine. The mode MODE is always a mode
777 of class `MODE_FLOAT'. OVERFLOW is nonzero if the value is already known to
780 If VALUE is not valid or if OVERFLOW is nonzero, you should set OVERFLOW to
781 1 and then assign some valid value to VALUE. Allowing an invalid value to
782 go through the compiler can produce incorrect assembler code which may even
783 cause Unix assemblers to crash.
785 This macro need not be defined if there is no work for it to do. */
786 /* #define CHECK_FLOAT_VALUE(MODE, VALUE, OVERFLOW) */
788 /* A code distinguishing the floating point format of the target machine.
789 There are three defined values:
792 This code indicates IEEE floating point. It is the default;
793 there is no need to define this macro when the format is IEEE.
796 This code indicates the peculiar format used on the Vax.
798 UNKNOWN_FLOAT_FORMAT'
799 This code indicates any other format.
801 The value of this macro is compared with `HOST_FLOAT_FORMAT'
802 to determine whether the target machine has the same format as
803 the host machine. If any other formats are actually in use on supported
804 machines, new codes should be defined for them.
806 The ordering of the component words of floating point values stored in
807 memory is controlled by `FLOAT_WORDS_BIG_ENDIAN' for the target machine and
808 `HOST_FLOAT_WORDS_BIG_ENDIAN' for the host. */
809 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
811 /* GNU CC supports two ways of implementing C++ vtables: traditional or with
812 so-called "thunks". The flag `-fvtable-thunk' chooses between them. Define
813 this macro to be a C expression for the default value of that flag. If
814 `DEFAULT_VTABLE_THUNKS' is 0, GNU CC uses the traditional implementation by
815 default. The "thunk" implementation is more efficient (especially if you
816 have provided an implementation of `ASM_OUTPUT_MI_THUNK', but is not binary
817 compatible with code compiled using the traditional implementation. If you
818 are writing a new ports, define `DEFAULT_VTABLE_THUNKS' to 1.
820 If you do not define this macro, the default for `-fvtable-thunk' is 0. */
821 #define DEFAULT_VTABLE_THUNKS 1
824 /* Layout of Source Language Data Types */
826 /* A C expression for the size in bits of the type `int' on the target machine.
827 If you don't define this, the default is one word. */
828 #define INT_TYPE_SIZE 16
830 /* Maximum number for the size in bits of the type `int' on the target machine.
831 If this is undefined, the default is `INT_TYPE_SIZE'. Otherwise, it is the
832 constant value that is the largest value that `INT_TYPE_SIZE' can have at
833 run-time. This is used in `cpp'. */
834 /* #define MAX_INT_TYPE_SIZE */
836 /* A C expression for the size in bits of the type `short' on the target
837 machine. If you don't define this, the default is half a word. (If this
838 would be less than one storage unit, it is rounded up to one unit.) */
839 #define SHORT_TYPE_SIZE 16
841 /* A C expression for the size in bits of the type `long' on the target
842 machine. If you don't define this, the default is one word. */
843 #define LONG_TYPE_SIZE 32
845 /* Maximum number for the size in bits of the type `long' on the target
846 machine. If this is undefined, the default is `LONG_TYPE_SIZE'. Otherwise,
847 it is the constant value that is the largest value that `LONG_TYPE_SIZE' can
848 have at run-time. This is used in `cpp'. */
849 /* #define MAX_LONG_TYPE_SIZE */
851 /* A C expression for the size in bits of the type `long long' on the target
852 machine. If you don't define this, the default is two words. If you want
853 to support GNU Ada on your machine, the value of macro must be at least 64. */
854 #define LONG_LONG_TYPE_SIZE 64
856 /* A C expression for the size in bits of the type `char' on the target
857 machine. If you don't define this, the default is one quarter of a word.
858 (If this would be less than one storage unit, it is rounded up to one unit.) */
859 #define CHAR_TYPE_SIZE 8
861 /* Maximum number for the size in bits of the type `char' on the target
862 machine. If this is undefined, the default is `CHAR_TYPE_SIZE'. Otherwise,
863 it is the constant value that is the largest value that `CHAR_TYPE_SIZE' can
864 have at run-time. This is used in `cpp'. */
865 /* #define MAX_CHAR_TYPE_SIZE */
867 /* A C expression for the size in bits of the type `float' on the target
868 machine. If you don't define this, the default is one word. */
869 #define FLOAT_TYPE_SIZE 32
871 /* A C expression for the size in bits of the type `double' on the target
872 machine. If you don't define this, the default is two words. */
873 #define DOUBLE_TYPE_SIZE 64
875 /* A C expression for the size in bits of the type `long double' on the target
876 machine. If you don't define this, the default is two words. */
877 #define LONG_DOUBLE_TYPE_SIZE 64
879 /* An expression whose value is 1 or 0, according to whether the type `char'
880 should be signed or unsigned by default. The user can always override this
881 default with the options `-fsigned-char' and `-funsigned-char'. */
882 #define DEFAULT_SIGNED_CHAR 0
884 /* A C expression to determine whether to give an `enum' type only as many
885 bytes as it takes to represent the range of possible values of that type. A
886 nonzero value means to do that; a zero value means all `enum' types should
887 be allocated like `int'.
889 If you don't define the macro, the default is 0. */
890 /* #define DEFAULT_SHORT_ENUMS */
892 /* A C expression for a string describing the name of the data type to use for
893 size values. The typedef name `size_t' is defined using the contents of the
896 The string can contain more than one keyword. If so, separate them with
897 spaces, and write first any length keyword, then `unsigned' if appropriate,
898 and finally `int'. The string must exactly match one of the data type names
899 defined in the function `init_decl_processing' in the file `c-decl.c'. You
900 may not omit `int' or change the order--that would cause the compiler to
903 If you don't define this macro, the default is `"long unsigned int"'.
905 Defined in svr4.h. */
906 #define SIZE_TYPE "unsigned int"
908 /* A C expression for a string describing the name of the data type to use for
909 the result of subtracting two pointers. The typedef name `ptrdiff_t' is
910 defined using the contents of the string. See `SIZE_TYPE' above for more
913 If you don't define this macro, the default is `"long int"'.
915 Defined in svr4.h. */
916 #define PTRDIFF_TYPE "int"
918 /* A C expression for a string describing the name of the data type to use for
919 wide characters. The typedef name `wchar_t' is defined using the contents
920 of the string. See `SIZE_TYPE' above for more information.
922 If you don't define this macro, the default is `"int"'.
924 Defined in svr4.h, to "long int". */
925 /* #define WCHAR_TYPE "long int" */
927 /* A C expression for the size in bits of the data type for wide characters.
928 This is used in `cpp', which cannot make use of `WCHAR_TYPE'.
930 Defined in svr4.h. */
931 #undef WCHAR_TYPE_SIZE
932 #define WCHAR_TYPE_SIZE 32
934 /* Maximum number for the size in bits of the data type for wide characters.
935 If this is undefined, the default is `WCHAR_TYPE_SIZE'. Otherwise, it is
936 the constant value that is the largest value that `WCHAR_TYPE_SIZE' can have
937 at run-time. This is used in `cpp'. */
938 /* #define MAX_WCHAR_TYPE_SIZE */
940 /* Define this macro if the type of Objective C selectors should be `int'.
942 If this macro is not defined, then selectors should have the type `struct
944 /* #define OBJC_INT_SELECTORS */
946 /* Define this macro if the compiler can group all the selectors together into
947 a vector and use just one label at the beginning of the vector. Otherwise,
948 the compiler must give each selector its own assembler label.
950 On certain machines, it is important to have a separate label for each
951 selector because this enables the linker to eliminate duplicate selectors. */
952 /* #define OBJC_SELECTORS_WITHOUT_LABELS */
955 /* Register Basics */
957 /* Number of hardware registers known to the compiler. They receive numbers 0
958 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
959 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
960 #define FIRST_PSEUDO_REGISTER 19
962 /* An initializer that says which registers are used for fixed purposes all
963 throughout the compiled code and are therefore not available for general
964 allocation. These would include the stack pointer, the frame pointer
965 (except on machines where that can be used as a general register when no
966 frame pointer is needed), the program counter on machines where that is
967 considered one of the addressable registers, and any other numbered register
970 This information is expressed as a sequence of numbers, separated by commas
971 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
974 The table initialized from this macro, and the table initialized by the
975 following one, may be overridden at run time either automatically, by the
976 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
977 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
978 #define FIXED_REGISTERS \
979 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1 }
981 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
982 general) by function calls as well as for fixed registers. This macro
983 therefore identifies the registers that are not available for general
984 allocation of values that must live across function calls.
986 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
987 saves it on function entry and restores it on function exit, if the register
988 is used within the function. */
989 #define CALL_USED_REGISTERS \
990 { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1 }
992 /* Zero or more C statements that may conditionally modify two variables
993 `fixed_regs' and `call_used_regs' (both of type `char []') after they have
994 been initialized from the two preceding macros.
996 This is necessary in case the fixed or call-clobbered registers depend on
999 You need not define this macro if it has no work to do.
1001 If the usage of an entire class of registers depends on the target flags,
1002 you may indicate this to GCC by using this macro to modify `fixed_regs' and
1003 `call_used_regs' to 1 for each of the registers in the classes which should
1004 not be used by GCC. Also define the macro `REG_CLASS_FROM_LETTER' to return
1005 `NO_REGS' if it is called with a letter for a class that shouldn't be used.
1007 (However, if this class is not included in `GENERAL_REGS' and all of the
1008 insn patterns whose constraints permit this class are controlled by target
1009 switches, then GCC will automatically avoid using these registers when the
1010 target switches are opposed to them.) */
1011 /* #define CONDITIONAL_REGISTER_USAGE */
1013 /* If this macro is defined and has a nonzero value, it means that `setjmp' and
1014 related functions fail to save the registers, or that `longjmp' fails to
1015 restore them. To compensate, the compiler avoids putting variables in
1016 registers in functions that use `setjmp'. */
1017 /* #define NON_SAVING_SETJMP */
1019 /* Define this macro if the target machine has register windows. This C
1020 expression returns the register number as seen by the called function
1021 corresponding to the register number OUT as seen by the calling function.
1022 Return OUT if register number OUT is not an outbound register. */
1023 /* #define INCOMING_REGNO(OUT) */
1025 /* Define this macro if the target machine has register windows. This C
1026 expression returns the register number as seen by the calling function
1027 corresponding to the register number IN as seen by the called function.
1028 Return IN if register number IN is not an inbound register. */
1029 /* #define OUTGOING_REGNO(IN) */
1032 /* Order of allocation of registers */
1034 /* If defined, an initializer for a vector of integers, containing the numbers
1035 of hard registers in the order in which GNU CC should prefer to use them
1036 (from most preferred to least).
1038 If this macro is not defined, registers are used lowest numbered first (all
1041 One use of this macro is on machines where the highest numbered registers
1042 must always be saved and the save-multiple-registers instruction supports
1043 only sequences of consecutive registers. On such machines, define
1044 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered
1045 allocatable register first. */
1046 #define REG_ALLOC_ORDER { 9, 7, 6, 5, 4, 3, 8, 2, 1, 0, 10, 11, 12, 13, 14, 15, 16 }
1048 /* A C statement (sans semicolon) to choose the order in which to allocate hard
1049 registers for pseudo-registers local to a basic block.
1051 Store the desired register order in the array `reg_alloc_order'. Element 0
1052 should be the register to allocate first; element 1, the next register; and
1055 The macro body should not assume anything about the contents of
1056 `reg_alloc_order' before execution of the macro.
1058 On most machines, it is not necessary to define this macro. */
1059 /* #define ORDER_REGS_FOR_LOCAL_ALLOC */
1062 /* How Values Fit in Registers */
1064 /* A C expression for the number of consecutive hard registers, starting at
1065 register number REGNO, required to hold a value of mode MODE.
1067 On a machine where all registers are exactly one word, a suitable definition
1070 #define HARD_REGNO_NREGS(REGNO, MODE) \
1071 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
1072 / UNITS_PER_WORD)) */
1073 #define HARD_REGNO_NREGS(REGNO, MODE) \
1074 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
1076 /* A C expression that is nonzero if it is permissible to store a value of mode
1077 MODE in hard register number REGNO (or in several registers starting with
1078 that one). For a machine where all registers are equivalent, a suitable
1081 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
1083 It is not necessary for this macro to check for the numbers of fixed
1084 registers, because the allocation mechanism considers them to be always
1087 On some machines, double-precision values must be kept in even/odd register
1088 pairs. The way to implement that is to define this macro to reject odd
1089 register numbers for such modes.
1091 The minimum requirement for a mode to be OK in a register is that the
1092 `movMODE' instruction pattern support moves between the register and any
1093 other hard register for which the mode is OK; and that moving a value into
1094 the register and back out not alter it.
1096 Since the same instruction used to move `SImode' will work for all narrower
1097 integer modes, it is not necessary on any machine for `HARD_REGNO_MODE_OK'
1098 to distinguish between these modes, provided you define patterns `movhi',
1099 etc., to take advantage of this. This is useful because of the interaction
1100 between `HARD_REGNO_MODE_OK' and `MODES_TIEABLE_P'; it is very desirable for
1101 all integer modes to be tieable.
1103 Many machines have special registers for floating point arithmetic. Often
1104 people assume that floating point machine modes are allowed only in floating
1105 point registers. This is not true. Any registers that can hold integers
1106 can safely *hold* a floating point machine mode, whether or not floating
1107 arithmetic can be done on it in those registers. Integer move instructions
1108 can be used to move the values.
1110 On some machines, though, the converse is true: fixed-point machine modes
1111 may not go in floating registers. This is true if the floating registers
1112 normalize any value stored in them, because storing a non-floating value
1113 there would garble it. In this case, `HARD_REGNO_MODE_OK' should reject
1114 fixed-point machine modes in floating registers. But if the floating
1115 registers do not automatically normalize, if you can store any bit pattern
1116 in one and retrieve it unchanged without a trap, then any machine mode may
1117 go in a floating register, so you can define this macro to say so.
1119 The primary significance of special floating registers is rather that they
1120 are the registers acceptable in floating point arithmetic instructions.
1121 However, this is of no concern to `HARD_REGNO_MODE_OK'. You handle it by
1122 writing the proper constraints for those instructions.
1124 On some machines, the floating registers are especially slow to access, so
1125 that it is better to store a value in a stack frame than in such a register
1126 if floating point arithmetic is not being done. As long as the floating
1127 registers are not in class `GENERAL_REGS', they will not be used unless some
1128 pattern's constraint asks for one. */
1129 #define HARD_REGNO_MODE_OK(REGNO, MODE) ((REGNO) != 16 || (MODE) == BImode)
1131 /* A C expression that is nonzero if it is desirable to choose register
1132 allocation so as to avoid move instructions between a value of mode MODE1
1133 and a value of mode MODE2.
1135 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
1136 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
1138 #define MODES_TIEABLE_P(MODE1, MODE2) ((MODE1) != BImode && (MODE2) != BImode)
1140 /* Define this macro if the compiler should avoid copies to/from CCmode
1141 registers. You should only define this macro if support fo copying to/from
1142 CCmode is incomplete. */
1143 /* #define AVOID_CCMODE_COPIES */
1146 /* Handling Leaf Functions */
1148 /* A C initializer for a vector, indexed by hard register number, which
1149 contains 1 for a register that is allowable in a candidate for leaf function
1152 If leaf function treatment involves renumbering the registers, then the
1153 registers marked here should be the ones before renumbering--those that GNU
1154 CC would ordinarily allocate. The registers which will actually be used in
1155 the assembler code, after renumbering, should not be marked with 1 in this
1158 Define this macro only if the target machine offers a way to optimize the
1159 treatment of leaf functions. */
1160 /* #define LEAF_REGISTERS */
1162 /* A C expression whose value is the register number to which REGNO should be
1163 renumbered, when a function is treated as a leaf function.
1165 If REGNO is a register number which should not appear in a leaf function
1166 before renumbering, then the expression should yield -1, which will cause
1167 the compiler to abort.
1169 Define this macro only if the target machine offers a way to optimize the
1170 treatment of leaf functions, and registers need to be renumbered to do this. */
1171 /* #define LEAF_REG_REMAP(REGNO) */
1174 /* Registers That Form a Stack. */
1176 /* Define this if the machine has any stack-like registers. */
1177 /* #define STACK_REGS */
1179 /* The number of the first stack-like register. This one is the top
1181 /* #define FIRST_STACK_REG */
1183 /* The number of the last stack-like register. This one is the
1184 bottom of the stack. */
1185 /* #define LAST_STACK_REG */
1188 /* Register Classes */
1190 /* An enumeral type that must be defined with all the register class names as
1191 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
1192 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
1193 which is not a register class but rather tells how many classes there are.
1195 Each register class has a number, which is the value of casting the class
1196 name to type `int'. The number serves as an index in many of the tables
1213 /* The number of distinct register classes, defined as follows:
1215 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
1216 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
1218 /* An initializer containing the names of the register classes as C string
1219 constants. These names are used in writing some of the debugging dumps. */
1220 #define REG_CLASS_NAMES \
1234 /* An initializer containing the contents of the register classes, as integers
1235 which are bit masks. The Nth integer specifies the contents of class N.
1236 The way the integer MASK is interpreted is that register R is in the class
1237 if `MASK & (1 << R)' is 1.
1239 When the machine has more than 32 registers, an integer does not suffice.
1240 Then the integers are replaced by sub-initializers, braced groupings
1241 containing several integers. Each sub-initializer must be suitable as an
1242 initializer for the type `HARD_REG_SET' which is defined in
1243 `hard-reg-set.h'. */
1244 #define REG_CLASS_CONTENTS \
1255 (1 << FIRST_PSEUDO_REGISTER) - 1 \
1258 /* A C expression whose value is a register class containing hard register
1259 REGNO. In general there is more than one such class; choose a class which
1260 is "minimal", meaning that no smaller class also contains the register. */
1261 #define REGNO_REG_CLASS(REGNO) \
1262 ((REGNO) == 0 ? R0_REGS \
1263 : (REGNO) == 1 ? R1_REGS \
1264 : (REGNO) == 2 ? R2_REGS \
1265 : (REGNO) < 8 ? EIGHT_REGS \
1266 : (REGNO) == 8 ? R8_REGS \
1267 : (REGNO) == 16 ? CARRY_REGS \
1268 : (REGNO) <= 18 ? GENERAL_REGS \
1271 /* A macro whose definition is the name of the class to which a valid base
1272 register must belong. A base register is one used in an address which is
1273 the register value plus a displacement. */
1274 #define BASE_REG_CLASS GENERAL_REGS
1276 /* A macro whose definition is the name of the class to which a valid index
1277 register must belong. An index register is one used in an address where its
1278 value is either multiplied by a scale factor or added to another register
1279 (as well as added to a displacement). */
1280 #define INDEX_REG_CLASS GENERAL_REGS
1282 /* A C expression which defines the machine-dependent operand constraint
1283 letters for register classes. If CHAR is such a letter, the value should be
1284 the register class corresponding to it. Otherwise, the value should be
1285 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
1286 will not be passed to this macro; you do not need to handle it.
1288 The following letters are unavailable, due to being used as
1293 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
1294 'Q', 'R', 'S', 'T', 'U'
1296 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
1298 #define REG_CLASS_FROM_LETTER(CHAR) \
1299 ( (CHAR) == 'a' ? R0_REGS \
1300 : (CHAR) == 'b' ? R1_REGS \
1301 : (CHAR) == 'c' ? R2_REGS \
1302 : (CHAR) == 't' ? TWO_REGS \
1303 : (CHAR) == 'e' ? EIGHT_REGS \
1304 : (CHAR) == 'y' ? CARRY_REGS \
1307 /* A C expression which is nonzero if register number NUM is suitable for use
1308 as a base register in operand addresses. It may be either a suitable hard
1309 register or a pseudo register that has been allocated such a hard register. */
1310 #define REGNO_OK_FOR_BASE_P(NUM) 1
1312 /* A C expression which is nonzero if register number NUM is suitable for use
1313 as an index register in operand addresses. It may be either a suitable hard
1314 register or a pseudo register that has been allocated such a hard register.
1316 The difference between an index register and a base register is that the
1317 index register may be scaled. If an address involves the sum of two
1318 registers, neither one of them scaled, then either one may be labeled the
1319 "base" and the other the "index"; but whichever labeling is used must fit
1320 the machine's constraints of which registers may serve in each capacity.
1321 The compiler will try both labelings, looking for one that is valid, and
1322 will reload one or both registers only if neither labeling works. */
1323 #define REGNO_OK_FOR_INDEX_P(NUM) REGNO_OK_FOR_BASE_P (NUM)
1325 /* A C expression that places additional restrictions on the register class to
1326 use when it is necessary to copy value X into a register in class CLASS.
1327 The value is a register class; perhaps CLASS, or perhaps another, smaller
1328 class. On many machines, the following definition is safe:
1330 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
1332 Sometimes returning a more restrictive class makes better code. For
1333 example, on the 68000, when X is an integer constant that is in range for a
1334 `moveq' instruction, the value of this macro is always `DATA_REGS' as long
1335 as CLASS includes the data registers. Requiring a data register guarantees
1336 that a `moveq' will be used.
1338 If X is a `const_double', by returning `NO_REGS' you can force X into a
1339 memory constant. This is useful on certain machines where immediate
1340 floating values cannot be loaded into certain kinds of registers.
1342 This declaration must be present. */
1343 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
1344 stormy16_preferred_reload_class (X, CLASS)
1346 /* Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of input
1347 reloads. If you don't define this macro, the default is to use CLASS,
1349 #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
1350 stormy16_preferred_reload_class (X, CLASS)
1352 /* A C expression that places additional restrictions on the register class to
1353 use when it is necessary to be able to hold a value of mode MODE in a reload
1354 register for which class CLASS would ordinarily be used.
1356 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when there are
1357 certain modes that simply can't go in certain reload classes.
1359 The value is a register class; perhaps CLASS, or perhaps another, smaller
1362 Don't define this macro unless the target machine has limitations which
1363 require the macro to do something nontrivial. */
1364 /* #define LIMIT_RELOAD_CLASS(MODE, CLASS) */
1366 /* Many machines have some registers that cannot be copied directly to or from
1367 memory or even from other types of registers. An example is the `MQ'
1368 register, which on most machines, can only be copied to or from general
1369 registers, but not memory. Some machines allow copying all registers to and
1370 from memory, but require a scratch register for stores to some memory
1371 locations (e.g., those with symbolic address on the RT, and those with
1372 certain symbolic address on the Sparc when compiling PIC). In some cases,
1373 both an intermediate and a scratch register are required.
1375 You should define these macros to indicate to the reload phase that it may
1376 need to allocate at least one register for a reload in addition to the
1377 register to contain the data. Specifically, if copying X to a register
1378 CLASS in MODE requires an intermediate register, you should define
1379 `SECONDARY_INPUT_RELOAD_CLASS' to return the largest register class all of
1380 whose registers can be used as intermediate registers or scratch registers.
1382 If copying a register CLASS in MODE to X requires an intermediate or scratch
1383 register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be defined to return the
1384 largest register class required. If the requirements for input and output
1385 reloads are the same, the macro `SECONDARY_RELOAD_CLASS' should be used
1386 instead of defining both macros identically.
1388 The values returned by these macros are often `GENERAL_REGS'. Return
1389 `NO_REGS' if no spare register is needed; i.e., if X can be directly copied
1390 to or from a register of CLASS in MODE without requiring a scratch register.
1391 Do not define this macro if it would always return `NO_REGS'.
1393 If a scratch register is required (either with or without an intermediate
1394 register), you should define patterns for `reload_inM' or `reload_outM', as
1395 required.. These patterns, which will normally be implemented with a
1396 `define_expand', should be similar to the `movM' patterns, except that
1397 operand 2 is the scratch register.
1399 Define constraints for the reload register and scratch register that contain
1400 a single register class. If the original reload register (whose class is
1401 CLASS) can meet the constraint given in the pattern, the value returned by
1402 these macros is used for the class of the scratch register. Otherwise, two
1403 additional reload registers are required. Their classes are obtained from
1404 the constraints in the insn pattern.
1406 X might be a pseudo-register or a `subreg' of a pseudo-register, which could
1407 either be in a hard register or in memory. Use `true_regnum' to find out;
1408 it will return -1 if the pseudo is in memory and the hard register number if
1409 it is in a register.
1411 These macros should not be used in the case where a particular class of
1412 registers can only be copied to memory and not to another class of
1413 registers. In that case, secondary reload registers are not needed and
1414 would not be helpful. Instead, a stack location must be used to perform the
1415 copy and the `movM' pattern should use memory as a intermediate storage.
1416 This case often occurs between floating-point and general registers. */
1418 /* This chip has the interesting property that only the first eight
1419 registers can be moved to/from memory. */
1420 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
1421 stormy16_secondary_reload_class (CLASS, MODE, X)
1423 /* #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) */
1424 /* #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) */
1426 /* Certain machines have the property that some registers cannot be copied to
1427 some other registers without using memory. Define this macro on those
1428 machines to be a C expression that is non-zero if objects of mode M in
1429 registers of CLASS1 can only be copied to registers of class CLASS2 by
1430 storing a register of CLASS1 into memory and loading that memory location
1431 into a register of CLASS2.
1433 Do not define this macro if its value would always be zero. */
1434 /* #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, M) */
1436 /* Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler allocates a
1437 stack slot for a memory location needed for register copies. If this macro
1438 is defined, the compiler instead uses the memory location defined by this
1441 Do not define this macro if you do not define
1442 `SECONDARY_MEMORY_NEEDED'. */
1443 /* #define SECONDARY_MEMORY_NEEDED_RTX(MODE) */
1445 /* When the compiler needs a secondary memory location to copy between two
1446 registers of mode MODE, it normally allocates sufficient memory to hold a
1447 quantity of `BITS_PER_WORD' bits and performs the store and load operations
1448 in a mode that many bits wide and whose class is the same as that of MODE.
1450 This is right thing to do on most machines because it ensures that all bits
1451 of the register are copied and prevents accesses to the registers in a
1452 narrower mode, which some machines prohibit for floating-point registers.
1454 However, this default behavior is not correct on some machines, such as the
1455 DEC Alpha, that store short integers in floating-point registers differently
1456 than in integer registers. On those machines, the default widening will not
1457 work correctly and you must define this macro to suppress that widening in
1458 some cases. See the file `alpha.h' for details.
1460 Do not define this macro if you do not define `SECONDARY_MEMORY_NEEDED' or
1461 if widening MODE to a mode that is `BITS_PER_WORD' bits wide is correct for
1463 /* #define SECONDARY_MEMORY_NEEDED_MODE(MODE) */
1465 /* Normally the compiler avoids choosing registers that have been explicitly
1466 mentioned in the rtl as spill registers (these registers are normally those
1467 used to pass parameters and return values). However, some machines have so
1468 few registers of certain classes that there would not be enough registers to
1469 use as spill registers if this were done.
1471 Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero value on
1472 these machines. When this macro has a non-zero value, the compiler allows
1473 registers explicitly used in the rtl to be used as spill registers but
1474 avoids extending the lifetime of these registers.
1476 It is always safe to define this macro with a non-zero value, but if you
1477 unnecessarily define it, you will reduce the amount of optimizations that
1478 can be performed in some cases. If you do not define this macro with a
1479 non-zero value when it is required, the compiler will run out of spill
1480 registers and print a fatal error message. For most machines, you should
1481 not define this macro at all. */
1482 /* #define SMALL_REGISTER_CLASSES */
1484 /* A C expression whose value is nonzero if pseudos that have been assigned to
1485 registers of class CLASS would likely be spilled because registers of CLASS
1486 are needed for spill registers.
1488 The default value of this macro returns 1 if CLASS has exactly one register
1489 and zero otherwise. On most machines, this default should be used. Only
1490 define this macro to some other expression if pseudo allocated by
1491 `local-alloc.c' end up in memory because their hard registers were needed
1492 for spill registers. If this macro returns nonzero for those classes, those
1493 pseudos will only be allocated by `global.c', which knows how to reallocate
1494 the pseudo to another register. If there would not be another register
1495 available for reallocation, you should not change the definition of this
1496 macro since the only effect of such a definition would be to slow down
1497 register allocation. */
1498 /* #define CLASS_LIKELY_SPILLED_P(CLASS) */
1500 /* A C expression for the maximum number of consecutive registers of
1501 class CLASS needed to hold a value of mode MODE.
1503 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value
1504 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
1505 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
1507 This macro helps control the handling of multiple-word values in
1510 This declaration is required. */
1511 #define CLASS_MAX_NREGS(CLASS, MODE) \
1512 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
1514 /* If defined, a C expression for a class that contains registers which the
1515 compiler must always access in a mode that is the same size as the mode in
1516 which it loaded the register.
1518 For the example, loading 32-bit integer or floating-point objects into
1519 floating-point registers on the Alpha extends them to 64-bits. Therefore
1520 loading a 64-bit object and then storing it as a 32-bit object does not
1521 store the low-order 32-bits, as would be the case for a normal register.
1522 Therefore, `alpha.h' defines this macro as `FLOAT_REGS'. */
1523 /* #define CLASS_CANNOT_CHANGE_SIZE */
1525 /* A C expression that defines the machine-dependent operand constraint letters
1526 (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
1527 If C is one of those letters, the expression should check that VALUE, an
1528 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C
1529 is not one of those letters, the value should be 0 regardless of VALUE. */
1530 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1531 ( (C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 3 \
1532 : (C) == 'J' ? exact_log2 (VALUE) != -1 \
1533 : (C) == 'K' ? exact_log2 (~(VALUE)) != -1 \
1534 : (C) == 'L' ? (VALUE) >= 0 && (VALUE) <= 255 \
1535 : (C) == 'M' ? (VALUE) >= -255 && (VALUE) <= 0 \
1536 : (C) == 'N' ? (VALUE) >= -3 && (VALUE) <= 0 \
1537 : (C) == 'O' ? (VALUE) >= 1 && (VALUE) <= 4 \
1538 : (C) == 'P' ? (VALUE) >= -4 && (VALUE) <= -1 \
1541 /* A C expression that defines the machine-dependent operand constraint letters
1542 (`G', `H') that specify particular ranges of `const_double' values.
1544 If C is one of those letters, the expression should check that VALUE, an RTX
1545 of code `const_double', is in the appropriate range and return 1 if so, 0
1546 otherwise. If C is not one of those letters, the value should be 0
1547 regardless of VALUE.
1549 `const_double' is used for all floating-point constants and for `DImode'
1550 fixed-point constants. A given letter can accept either or both kinds of
1551 values. It can use `GET_MODE' to distinguish between these kinds. */
1552 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 0
1554 /* A C expression that defines the optional machine-dependent constraint
1555 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
1556 types of operands, usually memory references, for the target machine.
1557 Normally this macro will not be defined. If it is required for a particular
1558 target machine, it should return 1 if VALUE corresponds to the operand type
1559 represented by the constraint letter C. If C is not defined as an extra
1560 constraint, the value returned should be 0 regardless of VALUE.
1562 For example, on the ROMP, load instructions cannot have their output in r0
1563 if the memory reference contains a symbolic address. Constraint letter `Q'
1564 is defined as representing a memory address that does *not* contain a
1565 symbolic address. An alternative is specified with a `Q' constraint on the
1566 input and `r' on the output. The next alternative specifies `m' on the
1567 input and a register class that does not include r0 on the output. */
1568 #define EXTRA_CONSTRAINT(VALUE, C) \
1569 stormy16_extra_constraint_p (VALUE, C)
1572 /* Basic Stack Layout */
1574 /* Define this macro if pushing a word onto the stack moves the stack pointer
1575 to a smaller address.
1577 When we say, "define this macro if ...," it means that the compiler checks
1578 this macro only with `#ifdef' so the precise definition used does not
1580 /* #define STACK_GROWS_DOWNWARD */
1582 /* We want to use post-increment instructions to push things on the stack,
1583 because we don't have any pre-increment ones. */
1584 #define STACK_PUSH_CODE POST_INC
1586 /* Define this macro if the addresses of local variable slots are at negative
1587 offsets from the frame pointer. */
1588 /* #define FRAME_GROWS_DOWNWARD */
1590 /* Define this macro if successive arguments to a function occupy decreasing
1591 addresses on the stack. */
1592 #define ARGS_GROW_DOWNWARD 1
1594 /* Offset from the frame pointer to the first local variable slot to be
1597 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by
1598 subtracting the first slot's length from `STARTING_FRAME_OFFSET'.
1599 Otherwise, it is found by adding the length of the first slot to
1600 the value `STARTING_FRAME_OFFSET'. */
1601 #define STARTING_FRAME_OFFSET 0
1603 /* Offset from the stack pointer register to the first location at which
1604 outgoing arguments are placed. If not specified, the default value of zero
1605 is used. This is the proper value for most machines.
1607 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1608 location at which outgoing arguments are placed. */
1609 /* #define STACK_POINTER_OFFSET */
1611 /* Offset from the argument pointer register to the first argument's address.
1612 On some machines it may depend on the data type of the function.
1614 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1615 argument's address. */
1616 #define FIRST_PARM_OFFSET(FUNDECL) 0
1618 /* Offset from the stack pointer register to an item dynamically allocated on
1619 the stack, e.g., by `alloca'.
1621 The default value for this macro is `STACK_POINTER_OFFSET' plus the length
1622 of the outgoing arguments. The default is correct for most machines. See
1623 `function.c' for details. */
1624 /* #define STACK_DYNAMIC_OFFSET(FUNDECL) */
1626 /* A C expression whose value is RTL representing the address in a stack frame
1627 where the pointer to the caller's frame is stored. Assume that FRAMEADDR is
1628 an RTL expression for the address of the stack frame itself.
1630 If you don't define this macro, the default is to return the value of
1631 FRAMEADDR--that is, the stack frame address is also the address of the stack
1632 word that points to the previous frame. */
1633 /* #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) */
1635 /* If defined, a C expression that produces the machine-specific code to setup
1636 the stack so that arbitrary frames can be accessed. For example, on the
1637 Sparc, we must flush all of the register windows to the stack before we can
1638 access arbitrary stack frames. This macro will seldom need to be defined. */
1639 /* #define SETUP_FRAME_ADDRESSES() */
1641 /* A C expression whose value is RTL representing the value of the return
1642 address for the frame COUNT steps up from the current frame, after the
1643 prologue. FRAMEADDR is the frame pointer of the COUNT frame, or the frame
1644 pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' is
1647 The value of the expression must always be the correct address when COUNT is
1648 zero, but may be `NULL_RTX' if there is not way to determine the return
1649 address of other frames. */
1650 #define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \
1652 ? gen_rtx_MEM (Pmode, arg_pointer_rtx) \
1655 /* Define this if the return address of a particular stack frame is
1656 accessed from the frame pointer of the previous stack frame. */
1657 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */
1659 /* A C expression whose value is RTL representing the location of the incoming
1660 return address at the beginning of any function, before the prologue. This
1661 RTL is either a `REG', indicating that the return value is saved in `REG',
1662 or a `MEM' representing a location in the stack.
1664 You only need to define this macro if you want to support call frame
1665 debugging information like that provided by DWARF 2. */
1666 #define INCOMING_RETURN_ADDR_RTX \
1667 gen_rtx_MEM (SImode, gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (-4)))
1669 /* A C expression whose value is an integer giving the offset, in bytes, from
1670 the value of the stack pointer register to the top of the stack frame at the
1671 beginning of any function, before the prologue. The top of the frame is
1672 defined to be the value of the stack pointer in the previous frame, just
1673 before the call instruction.
1675 You only need to define this macro if you want to support call frame
1676 debugging information like that provided by DWARF 2. */
1677 #define INCOMING_FRAME_SP_OFFSET (stormy16_interrupt_function_p () ? 6 : 4)
1680 /* Stack Checking. */
1682 /* A nonzero value if stack checking is done by the configuration files in a
1683 machine-dependent manner. You should define this macro if stack checking is
1684 require by the ABI of your machine or if you would like to have to stack
1685 checking in some more efficient way than GNU CC's portable approach. The
1686 default value of this macro is zero. */
1687 /* #define STACK_CHECK_BUILTIN */
1689 /* An integer representing the interval at which GNU CC must generate stack
1690 probe instructions. You will normally define this macro to be no larger
1691 than the size of the "guard pages" at the end of a stack area. The default
1692 value of 4096 is suitable for most systems. */
1693 /* #define STACK_CHECK_PROBE_INTERVAL */
1695 /* A integer which is nonzero if GNU CC should perform the stack probe as a
1696 load instruction and zero if GNU CC should use a store instruction. The
1697 default is zero, which is the most efficient choice on most systems. */
1698 /* #define STACK_CHECK_PROBE_LOAD */
1700 /* The number of bytes of stack needed to recover from a stack overflow, for
1701 languages where such a recovery is supported. The default value of 75 words
1702 should be adequate for most machines. */
1703 /* #define STACK_CHECK_PROTECT */
1705 /* The maximum size of a stack frame, in bytes. GNU CC will generate probe
1706 instructions in non-leaf functions to ensure at least this many bytes of
1707 stack are available. If a stack frame is larger than this size, stack
1708 checking will not be reliable and GNU CC will issue a warning. The default
1709 is chosen so that GNU CC only generates one instruction on most systems.
1710 You should normally not change the default value of this macro. */
1711 /* #define STACK_CHECK_MAX_FRAME_SIZE */
1713 /* GNU CC uses this value to generate the above warning message. It represents
1714 the amount of fixed frame used by a function, not including space for any
1715 callee-saved registers, temporaries and user variables. You need only
1716 specify an upper bound for this amount and will normally use the default of
1718 /* #define STACK_CHECK_FIXED_FRAME_SIZE */
1720 /* The maximum size, in bytes, of an object that GNU CC will place in the fixed
1721 area of the stack frame when the user specifies `-fstack-check'. GNU CC
1722 computed the default from the values of the above macros and you will
1723 normally not need to override that default. */
1724 /* #define STACK_CHECK_MAX_VAR_SIZE */
1727 /* Register That Address the Stack Frame. */
1729 /* The register number of the stack pointer register, which must also be a
1730 fixed register according to `FIXED_REGISTERS'. On most machines, the
1731 hardware determines which register this is. */
1732 #define STACK_POINTER_REGNUM 15
1734 /* The register number of the frame pointer register, which is used to access
1735 automatic variables in the stack frame. On some machines, the hardware
1736 determines which register this is. On other machines, you can choose any
1737 register you wish for this purpose. */
1738 #define FRAME_POINTER_REGNUM 17
1740 /* On some machines the offset between the frame pointer and starting offset of
1741 the automatic variables is not known until after register allocation has
1742 been done (for example, because the saved registers are between these two
1743 locations). On those machines, define `FRAME_POINTER_REGNUM' the number of
1744 a special, fixed register to be used internally until the offset is known,
1745 and define `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
1746 used for the frame pointer.
1748 You should define this macro only in the very rare circumstances when it is
1749 not possible to calculate the offset between the frame pointer and the
1750 automatic variables until after register allocation has been completed.
1751 When this macro is defined, you must also indicate in your definition of
1752 `ELIMINABLE_REGS' how to eliminate `FRAME_POINTER_REGNUM' into either
1753 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
1755 Do not define this macro if it would be the same as `FRAME_POINTER_REGNUM'. */
1756 #define HARD_FRAME_POINTER_REGNUM 13
1758 /* The register number of the arg pointer register, which is used to access the
1759 function's argument list. On some machines, this is the same as the frame
1760 pointer register. On some machines, the hardware determines which register
1761 this is. On other machines, you can choose any register you wish for this
1762 purpose. If this is not the same register as the frame pointer register,
1763 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
1764 arrange to be able to eliminate it. */
1765 #define ARG_POINTER_REGNUM 18
1767 /* The register number of the return address pointer register, which is used to
1768 access the current function's return address from the stack. On some
1769 machines, the return address is not at a fixed offset from the frame pointer
1770 or stack pointer or argument pointer. This register can be defined to point
1771 to the return address on the stack, and then be converted by
1772 `ELIMINABLE_REGS' into either the frame pointer or stack pointer.
1774 Do not define this macro unless there is no other way to get the return
1775 address from the stack. */
1776 /* #define RETURN_ADDRESS_POINTER_REGNUM */
1778 /* Register numbers used for passing a function's static chain pointer. If
1779 register windows are used, the register number as seen by the called
1780 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
1781 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
1782 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
1784 The static chain register need not be a fixed register.
1786 If the static chain is passed in memory, these macros should not be defined;
1787 instead, the next two macros should be defined. */
1788 #define STATIC_CHAIN_REGNUM 12
1789 /* #define STATIC_CHAIN_INCOMING_REGNUM */
1791 /* If the static chain is passed in memory, these macros provide rtx giving
1792 `mem' expressions that denote where they are stored. `STATIC_CHAIN' and
1793 `STATIC_CHAIN_INCOMING' give the locations as seen by the calling and called
1794 functions, respectively. Often the former will be at an offset from the
1795 stack pointer and the latter at an offset from the frame pointer.
1797 The variables `stack_pointer_rtx', `frame_pointer_rtx', and
1798 `arg_pointer_rtx' will have been initialized prior to the use of these
1799 macros and should be used to refer to those items.
1801 If the static chain is passed in a register, the two previous
1802 macros should be defined instead. */
1803 /* #define STATIC_CHAIN */
1804 /* #define STATIC_CHAIN_INCOMING */
1807 /* Eliminating the Frame Pointer and the Arg Pointer */
1809 /* A C expression which is nonzero if a function must have and use a frame
1810 pointer. This expression is evaluated in the reload pass. If its value is
1811 nonzero the function will have a frame pointer.
1813 The expression can in principle examine the current function and decide
1814 according to the facts, but on most machines the constant 0 or the constant
1815 1 suffices. Use 0 when the machine allows code to be generated with no
1816 frame pointer, and doing so saves some time or space. Use 1 when there is
1817 no possible advantage to avoiding a frame pointer.
1819 In certain cases, the compiler does not know how to produce valid code
1820 without a frame pointer. The compiler recognizes those cases and
1821 automatically gives the function a frame pointer regardless of what
1822 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them.
1824 In a function that does not require a frame pointer, the frame pointer
1825 register can be allocated for ordinary usage, unless you mark it as a fixed
1826 register. See `FIXED_REGISTERS' for more information. */
1827 #define FRAME_POINTER_REQUIRED 0
1829 /* A C statement to store in the variable DEPTH_VAR the difference between the
1830 frame pointer and the stack pointer values immediately after the function
1831 prologue. The value would be computed from information such as the result
1832 of `get_frame_size ()' and the tables of registers `regs_ever_live' and
1835 If `ELIMINABLE_REGS' is defined, this macro will be not be used and need not
1836 be defined. Otherwise, it must be defined even if `FRAME_POINTER_REQUIRED'
1837 is defined to always be true; in that case, you may set DEPTH_VAR to
1839 /* #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) */
1841 /* If defined, this macro specifies a table of register pairs used to eliminate
1842 unneeded registers that point into the stack frame. If it is not defined,
1843 the only elimination attempted by the compiler is to replace references to
1844 the frame pointer with references to the stack pointer.
1846 The definition of this macro is a list of structure initializations, each of
1847 which specifies an original and replacement register.
1850 #define ELIMINABLE_REGS \
1852 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1853 {FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
1854 {ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1855 {ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
1858 /* A C expression that returns non-zero if the compiler is allowed to try to
1859 replace register number FROM with register number TO. This macro need only
1860 be defined if `ELIMINABLE_REGS' is defined, and will usually be the constant
1861 1, since most of the cases preventing register elimination are things that
1862 the compiler already knows about. */
1864 #define CAN_ELIMINATE(FROM, TO) \
1865 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
1866 ? ! frame_pointer_needed \
1869 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the
1870 initial difference between the specified pair of registers. This macro must
1871 be defined if `ELIMINABLE_REGS' is defined. */
1872 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1873 (OFFSET) = stormy16_initial_elimination_offset (FROM, TO)
1875 /* Define this macro if the `longjmp' function restores registers from the
1876 stack frames, rather than from those saved specifically by `setjmp'.
1877 Certain quantities must not be kept in registers across a call to `setjmp'
1878 on such machines. */
1879 /* #define LONGJMP_RESTORE_FROM_STACK */
1882 /* Passing Function Arguments on the Stack */
1884 /* Define this macro if an argument declared in a prototype as an integral type
1885 smaller than `int' should actually be passed as an `int'. In addition to
1886 avoiding errors in certain cases of mismatch, it also makes for better code
1887 on certain machines. */
1888 #define PROMOTE_PROTOTYPES 1
1890 /* A C expression that is the number of bytes actually pushed onto the stack
1891 when an instruction attempts to push NPUSHED bytes.
1893 If the target machine does not have a push instruction, do not define this
1894 macro. That directs GNU CC to use an alternate strategy: to allocate the
1895 entire argument block and then store the arguments into it.
1897 On some machines, the definition
1899 #define PUSH_ROUNDING(BYTES) (BYTES)
1901 will suffice. But on other machines, instructions that appear to push one
1902 byte actually push two bytes in an attempt to maintain alignment. Then the
1903 definition should be
1905 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
1906 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1)
1908 /* If defined, the maximum amount of space required for outgoing arguments will
1909 be computed and placed into the variable
1910 `current_function_outgoing_args_size'. No space will be pushed onto the
1911 stack for each call; instead, the function prologue should increase the
1912 stack frame size by this amount.
1914 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
1916 /* #define ACCUMULATE_OUTGOING_ARGS */
1918 /* Define this macro if functions should assume that stack space has been
1919 allocated for arguments even when their values are passed in registers.
1921 The value of this macro is the size, in bytes, of the area reserved for
1922 arguments passed in registers for the function represented by FNDECL.
1924 This space can be allocated by the caller, or be a part of the
1925 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says
1927 /* #define REG_PARM_STACK_SPACE(FNDECL) */
1929 /* Define these macros in addition to the one above if functions might allocate
1930 stack space for arguments even when their values are passed in registers.
1931 These should be used when the stack space allocated for arguments in
1932 registers is not a simple constant independent of the function declaration.
1934 The value of the first macro is the size, in bytes, of the area that we
1935 should initially assume would be reserved for arguments passed in registers.
1937 The value of the second macro is the actual size, in bytes, of the area that
1938 will be reserved for arguments passed in registers. This takes two
1939 arguments: an integer representing the number of bytes of fixed sized
1940 arguments on the stack, and a tree representing the number of bytes of
1941 variable sized arguments on the stack.
1943 When these macros are defined, `REG_PARM_STACK_SPACE' will only be called
1944 for libcall functions, the current function, or for a function being called
1945 when it is known that such stack space must be allocated. In each case this
1946 value can be easily computed.
1948 When deciding whether a called function needs such stack space, and how much
1949 space to reserve, GNU CC uses these two macros instead of
1950 `REG_PARM_STACK_SPACE'. */
1951 /* #define MAYBE_REG_PARM_STACK_SPACE */
1952 /* #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE) */
1954 /* Define this if it is the responsibility of the caller to allocate the area
1955 reserved for arguments passed in registers.
1957 If `ACCUMULATE_OUTGOING_ARGS' is defined, this macro controls whether the
1958 space for these arguments counts in the value of
1959 `current_function_outgoing_args_size'. */
1960 /* #define OUTGOING_REG_PARM_STACK_SPACE */
1962 /* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the stack
1963 parameters don't skip the area specified by it.
1965 Normally, when a parameter is not passed in registers, it is placed on the
1966 stack beyond the `REG_PARM_STACK_SPACE' area. Defining this macro
1967 suppresses this behavior and causes the parameter to be passed on the stack
1968 in its natural location. */
1969 /* #define STACK_PARMS_IN_REG_PARM_AREA */
1971 /* A C expression that should indicate the number of bytes of its own arguments
1972 that a function pops on returning, or 0 if the function pops no arguments
1973 and the caller must therefore pop them all after the function returns.
1975 FUNDECL is a C variable whose value is a tree node that describes the
1976 function in question. Normally it is a node of type `FUNCTION_DECL' that
1977 describes the declaration of the function. From this it is possible to
1978 obtain the DECL_MACHINE_ATTRIBUTES of the function.
1980 FUNTYPE is a C variable whose value is a tree node that describes the
1981 function in question. Normally it is a node of type `FUNCTION_TYPE' that
1982 describes the data type of the function. From this it is possible to obtain
1983 the data types of the value and arguments (if known).
1985 When a call to a library function is being considered, FUNTYPE will contain
1986 an identifier node for the library function. Thus, if you need to
1987 distinguish among various library functions, you can do so by their names.
1988 Note that "library function" in this context means a function used to
1989 perform arithmetic, whose name is known specially in the compiler and was
1990 not mentioned in the C code being compiled.
1992 STACK-SIZE is the number of bytes of arguments passed on the stack. If a
1993 variable number of bytes is passed, it is zero, and argument popping will
1994 always be the responsibility of the calling function.
1996 On the Vax, all functions always pop their arguments, so the definition of
1997 this macro is STACK-SIZE. On the 68000, using the standard calling
1998 convention, no functions pop their arguments, so the value of the macro is
1999 always 0 in this case. But an alternative calling convention is available
2000 in which functions that take a fixed number of arguments pop them but other
2001 functions (such as `printf') pop nothing (the caller pops all). When this
2002 convention is in use, FUNTYPE is examined to determine whether a function
2003 takes a fixed number of arguments. */
2004 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
2007 /* Function Arguments in Registers */
2009 #define NUM_ARGUMENT_REGISTERS 8
2010 #define FIRST_ARGUMENT_REGISTER 2
2012 #define STORMY16_WORD_SIZE(TYPE, MODE) \
2013 ((((TYPE) ? int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) \
2017 /* A C expression that controls whether a function argument is passed in a
2018 register, and which register.
2020 The arguments are CUM, of type CUMULATIVE_ARGS, which summarizes
2021 (in a way defined by INIT_CUMULATIVE_ARGS and FUNCTION_ARG_ADVANCE)
2022 all of the previous arguments so far passed in registers; MODE, the
2023 machine mode of the argument; TYPE, the data type of the argument
2024 as a tree node or 0 if that is not known (which happens for C
2025 support library functions); and NAMED, which is 1 for an ordinary
2026 argument and 0 for nameless arguments that correspond to `...' in
2027 the called function's prototype.
2029 The value of the expression should either be a `reg' RTX for the hard
2030 register in which to pass the argument, or zero to pass the argument on the
2033 For machines like the Vax and 68000, where normally all arguments are
2034 pushed, zero suffices as a definition.
2036 The usual way to make the ANSI library `stdarg.h' work on a machine where
2037 some arguments are usually passed in registers, is to cause nameless
2038 arguments to be passed on the stack instead. This is done by making
2039 `FUNCTION_ARG' return 0 whenever NAMED is 0.
2041 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of
2042 this macro to determine if this argument is of a type that must be passed in
2043 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG'
2044 returns non-zero for such an argument, the compiler will abort. If
2045 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the
2046 stack and then loaded into a register. */
2047 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
2048 ((MODE) == VOIDmode ? const0_rtx \
2049 : (CUM) + STORMY16_WORD_SIZE (TYPE, MODE) > NUM_ARGUMENT_REGISTERS ? 0 \
2050 : gen_rtx_REG (MODE, (CUM) + 2))
2052 /* Define this macro if the target machine has "register windows", so that the
2053 register in which a function sees an arguments is not necessarily the same
2054 as the one in which the caller passed the argument.
2056 For such machines, `FUNCTION_ARG' computes the register in which the caller
2057 passes the value, and `FUNCTION_INCOMING_ARG' should be defined in a similar
2058 fashion to tell the function being called where the arguments will arrive.
2060 If `FUNCTION_INCOMING_ARG' is not defined, `FUNCTION_ARG' serves both
2062 /* #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) */
2064 /* A C expression for the number of words, at the beginning of an argument,
2065 must be put in registers. The value must be zero for arguments that are
2066 passed entirely in registers or that are entirely pushed on the stack.
2068 On some machines, certain arguments must be passed partially in registers
2069 and partially in memory. On these machines, typically the first N words of
2070 arguments are passed in registers, and the rest on the stack. If a
2071 multi-word argument (a `double' or a structure) crosses that boundary, its
2072 first few words must be passed in registers and the rest must be pushed.
2073 This macro tells the compiler when this occurs, and how many of the words
2074 should go in registers.
2076 `FUNCTION_ARG' for these arguments should return the first register to be
2077 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for
2078 the called function. */
2079 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0
2081 /* A C expression that indicates when an argument must be passed by reference.
2082 If nonzero for an argument, a copy of that argument is made in memory and a
2083 pointer to the argument is passed instead of the argument itself. The
2084 pointer is passed in whatever way is appropriate for passing a pointer to
2087 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable
2088 definition of this macro might be
2089 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
2090 MUST_PASS_IN_STACK (MODE, TYPE) */
2091 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0
2093 /* If defined, a C expression that indicates when it is more
2094 desirable to keep an argument passed by invisible reference as a
2095 reference, rather than copying it to a pseudo register. */
2096 /* #define FUNCTION_ARG_KEEP_AS_REFERENCE(CUM, MODE, TYPE, NAMED) */
2098 /* If defined, a C expression that indicates when it is the called function's
2099 responsibility to make a copy of arguments passed by invisible reference.
2100 Normally, the caller makes a copy and passes the address of the copy to the
2101 routine being called. When FUNCTION_ARG_CALLEE_COPIES is defined and is
2102 nonzero, the caller does not make a copy. Instead, it passes a pointer to
2103 the "live" value. The called function must not modify this value. If it
2104 can be determined that the value won't be modified, it need not make a copy;
2105 otherwise a copy must be made. */
2106 /* #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) */
2108 /* A C type for declaring a variable that is used as the first argument of
2109 `FUNCTION_ARG' and other related values. For some target machines, the type
2110 `int' suffices and can hold the number of bytes of argument so far.
2112 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
2113 that have been passed on the stack. The compiler has other variables to
2114 keep track of that. For target machines on which all arguments are passed
2115 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
2116 however, the data structure must exist and should not be empty, so use
2119 For this platform, the value of CUMULATIVE_ARGS is the number of words
2120 of arguments that have been passed in registers so far. */
2121 typedef int CUMULATIVE_ARGS
;
2123 /* A C statement (sans semicolon) for initializing the variable CUM for the
2124 state at the beginning of the argument list. The variable has type
2125 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
2126 of the function which will receive the args, or 0 if the args are to a
2127 compiler support library function. The value of INDIRECT is nonzero when
2128 processing an indirect call, for example a call through a function pointer.
2129 The value of INDIRECT is zero for a call to an explicitly named function, a
2130 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
2131 arguments for the function being compiled.
2133 When processing a call to a compiler support library function, LIBNAME
2134 identifies which one. It is a `symbol_ref' rtx which contains the name of
2135 the function, as a string. LIBNAME is 0 when an ordinary C function call is
2136 being processed. Thus, each time this macro is called, either LIBNAME or
2137 FNTYPE is nonzero, but never both of them at once. */
2138 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) (CUM) = 0
2140 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the
2141 arguments for the function being compiled. If this macro is undefined,
2142 `INIT_CUMULATIVE_ARGS' is used instead.
2144 The value passed for LIBNAME is always 0, since library routines with
2145 special calling conventions are never compiled with GNU CC. The argument
2146 LIBNAME exists for symmetry with `INIT_CUMULATIVE_ARGS'. */
2147 /* #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) */
2149 /* A C statement (sans semicolon) to update the summarizer variable CUM to
2150 advance past an argument in the argument list. The values MODE, TYPE and
2151 NAMED describe that argument. Once this is done, the variable CUM is
2152 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
2154 This macro need not do anything if the argument in question was passed on
2155 the stack. The compiler knows how to track the amount of stack space used
2156 for arguments without any special help. */
2157 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
2158 ((CUM) = stormy16_function_arg_advance (CUM, MODE, TYPE, NAMED))
2160 /* If defined, a C expression which determines whether, and in which direction,
2161 to pad out an argument with extra space. The value should be of type `enum
2162 direction': either `upward' to pad above the argument, `downward' to pad
2163 below, or `none' to inhibit padding.
2165 The *amount* of padding is always just enough to reach the next multiple of
2166 `FUNCTION_ARG_BOUNDARY'; this macro does not control it.
2168 This macro has a default definition which is right for most systems. For
2169 little-endian machines, the default is to pad upward. For big-endian
2170 machines, the default is to pad downward for an argument of constant size
2171 shorter than an `int', and upward otherwise. */
2172 /* #define FUNCTION_ARG_PADDING(MODE, TYPE) */
2174 /* If defined, a C expression that gives the alignment boundary, in bits, of an
2175 argument with the specified mode and type. If it is not defined,
2176 `PARM_BOUNDARY' is used for all arguments. */
2177 /* #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) */
2179 /* A C expression that is nonzero if REGNO is the number of a hard register in
2180 which function arguments are sometimes passed. This does *not* include
2181 implicit arguments such as the static chain and the structure-value address.
2182 On many machines, no registers can be used for this purpose since all
2183 function arguments are pushed on the stack. */
2184 #define FUNCTION_ARG_REGNO_P(REGNO) \
2185 ((REGNO) >= FIRST_ARGUMENT_REGISTER \
2186 && (REGNO) < FIRST_ARGUMENT_REGISTER + NUM_ARGUMENT_REGISTERS)
2189 /* How Scalar Function Values are Returned */
2191 /* The number of the hard register that is used to return a scalar value from a
2193 #define RETURN_VALUE_REGNUM FIRST_ARGUMENT_REGISTER
2195 /* Define this macro if `-traditional' should not cause functions declared to
2196 return `float' to convert the value to `double'. */
2197 /* #define TRADITIONAL_RETURN_FLOAT */
2199 /* A C expression to create an RTX representing the place where a function
2200 returns a value of data type VALTYPE. VALTYPE is a tree node representing a
2201 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to
2202 represent that type. On many machines, only the mode is relevant.
2203 (Actually, on most machines, scalar values are returned in the same place
2204 regardless of mode).
2206 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion
2207 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type.
2209 If the precise function being called is known, FUNC is a tree node
2210 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it
2211 possible to use a different value-returning convention for specific
2212 functions when all their calls are known.
2214 `FUNCTION_VALUE' is not used for return vales with aggregate data types,
2215 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and
2216 related macros, below. */
2217 #define FUNCTION_VALUE(VALTYPE, FUNC) \
2218 stormy16_function_value (VALTYPE, FUNC)
2221 /* Define this macro if the target machine has "register windows" so that the
2222 register in which a function returns its value is not the same as the one in
2223 which the caller sees the value.
2225 For such machines, `FUNCTION_VALUE' computes the register in which the
2226 caller will see the value. `FUNCTION_OUTGOING_VALUE' should be defined in a
2227 similar fashion to tell the function where to put the value.
2229 If `FUNCTION_OUTGOING_VALUE' is not defined, `FUNCTION_VALUE' serves both
2232 `FUNCTION_OUTGOING_VALUE' is not used for return vales with aggregate data
2233 types, because these are returned in another way. See `STRUCT_VALUE_REGNUM'
2234 and related macros, below. */
2235 /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) */
2237 /* A C expression to create an RTX representing the place where a library
2238 function returns a value of mode MODE.
2240 Note that "library function" in this context means a compiler support
2241 routine, used to perform arithmetic, whose name is known specially by the
2242 compiler and was not mentioned in the C code being compiled.
2244 The definition of `LIBRARY_VALUE' need not be concerned aggregate data
2245 types, because none of the library functions returns such types. */
2246 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RETURN_VALUE_REGNUM)
2248 /* A C expression that is nonzero if REGNO is the number of a hard register in
2249 which the values of called function may come back.
2251 A register whose use for returning values is limited to serving as the
2252 second of a pair (for a value of type `double', say) need not be recognized
2253 by this macro. So for most machines, this definition suffices:
2255 #define FUNCTION_VALUE_REGNO_P(N) ((N) == RETURN)
2257 If the machine has register windows, so that the caller and the called
2258 function use different registers for the return value, this macro should
2259 recognize only the caller's register numbers. */
2260 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == RETURN_VALUE_REGNUM)
2262 /* Define this macro if `untyped_call' and `untyped_return' need more space
2263 than is implied by `FUNCTION_VALUE_REGNO_P' for saving and restoring an
2264 arbitrary return value. */
2265 /* #define APPLY_RESULT_SIZE */
2268 /* How Large Values are Returned */
2270 /* A C expression which can inhibit the returning of certain function values in
2271 registers, based on the type of value. A nonzero value says to return the
2272 function value in memory, just as large structures are always returned.
2273 Here TYPE will be a C expression of type `tree', representing the data type
2276 Note that values of mode `BLKmode' must be explicitly handled by this macro.
2277 Also, the option `-fpcc-struct-return' takes effect regardless of this
2278 macro. On most systems, it is possible to leave the macro undefined; this
2279 causes a default definition to be used, whose value is the constant 1 for
2280 `BLKmode' values, and 0 otherwise.
2282 Do not use this macro to indicate that structures and unions should always
2283 be returned in memory. You should instead use `DEFAULT_PCC_STRUCT_RETURN'
2284 to indicate this. */
2285 #define RETURN_IN_MEMORY(TYPE) \
2286 (int_size_in_bytes (TYPE) > UNITS_PER_WORD * NUM_ARGUMENT_REGISTERS)
2288 /* Define this macro to be 1 if all structure and union return values must be
2289 in memory. Since this results in slower code, this should be defined only
2290 if needed for compatibility with other compilers or with an ABI. If you
2291 define this macro to be 0, then the conventions used for structure and union
2292 return values are decided by the `RETURN_IN_MEMORY' macro.
2294 If not defined, this defaults to the value 1. */
2295 /* #define DEFAULT_PCC_STRUCT_RETURN */
2297 /* If the structure value address is passed in a register, then
2298 `STRUCT_VALUE_REGNUM' should be the number of that register. */
2299 /* #define STRUCT_VALUE_REGNUM */
2301 /* If the structure value address is not passed in a register, define
2302 `STRUCT_VALUE' as an expression returning an RTX for the place where the
2303 address is passed. If it returns 0, the address is passed as an "invisible"
2305 #define STRUCT_VALUE 0
2307 /* On some architectures the place where the structure value address is found
2308 by the called function is not the same place that the caller put it. This
2309 can be due to register windows, or it could be because the function prologue
2310 moves it to a different place.
2312 If the incoming location of the structure value address is in a register,
2313 define this macro as the register number. */
2314 /* #define STRUCT_VALUE_INCOMING_REGNUM */
2316 /* If the incoming location is not a register, then you should define
2317 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the called
2318 function should find the value. If it should find the value on the stack,
2319 define this to create a `mem' which refers to the frame pointer. A
2320 definition of 0 means that the address is passed as an "invisible" first
2322 /* #define STRUCT_VALUE_INCOMING */
2324 /* Define this macro if the usual system convention on the target machine for
2325 returning structures and unions is for the called function to return the
2326 address of a static variable containing the value.
2328 Do not define this if the usual system convention is for the caller to pass
2329 an address to the subroutine.
2331 This macro has effect in `-fpcc-struct-return' mode, but it does nothing
2332 when you use `-freg-struct-return' mode. */
2333 /* #define PCC_STATIC_STRUCT_RETURN */
2336 /* Caller-Saves Register Allocation */
2338 /* Define this macro if function calls on the target machine do not preserve
2339 any registers; in other words, if `CALL_USED_REGISTERS' has 1 for all
2340 registers. This macro enables `-fcaller-saves' by default. Eventually that
2341 option will be enabled by default on all machines and both the option and
2342 this macro will be eliminated. */
2343 /* #define DEFAULT_CALLER_SAVES */
2345 /* A C expression to determine whether it is worthwhile to consider placing a
2346 pseudo-register in a call-clobbered hard register and saving and restoring
2347 it around each function call. The expression should be 1 when this is worth
2348 doing, and 0 otherwise.
2350 If you don't define this macro, a default is used which is good on most
2351 machines: `4 * CALLS < REFS'. */
2352 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */
2355 /* Function Entry and Exit */
2357 /* Define this macro as a C expression that is nonzero if the return
2358 instruction or the function epilogue ignores the value of the stack pointer;
2359 in other words, if it is safe to delete an instruction to adjust the stack
2360 pointer before a return from the function.
2362 Note that this macro's value is relevant only for functions for which frame
2363 pointers are maintained. It is never safe to delete a final stack
2364 adjustment in a function that has no frame pointer, and the compiler knows
2365 this regardless of `EXIT_IGNORE_STACK'. */
2366 /* #define EXIT_IGNORE_STACK */
2368 /* Define this macro as a C expression that is nonzero for registers
2369 are used by the epilogue or the `return' pattern. The stack and
2370 frame pointer registers are already be assumed to be used as
2372 #define EPILOGUE_USES(REGNO) \
2373 stormy16_epilogue_uses (REGNO)
2375 /* Define this macro if the function epilogue contains delay slots to which
2376 instructions from the rest of the function can be "moved". The definition
2377 should be a C expression whose value is an integer representing the number
2378 of delay slots there. */
2379 /* #define DELAY_SLOTS_FOR_EPILOGUE */
2381 /* A C expression that returns 1 if INSN can be placed in delay slot number N
2384 The argument N is an integer which identifies the delay slot now being
2385 considered (since different slots may have different rules of eligibility).
2386 It is never negative and is always less than the number of epilogue delay
2387 slots (what `DELAY_SLOTS_FOR_EPILOGUE' returns). If you reject a particular
2388 insn for a given delay slot, in principle, it may be reconsidered for a
2389 subsequent delay slot. Also, other insns may (at least in principle) be
2390 considered for the so far unfilled delay slot.
2392 The insns accepted to fill the epilogue delay slots are put in an
2393 RTL list made with `insn_list' objects, stored in the variable
2394 `current_function_epilogue_delay_list'. The insn for the first
2395 delay slot comes first in the list. Your definition of the macro
2396 `FUNCTION_EPILOGUE' should fill the delay slots by outputting the
2397 insns in this list, usually by calling `final_scan_insn'.
2399 You need not define this macro if you did not define
2400 `DELAY_SLOTS_FOR_EPILOGUE'. */
2401 /* #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) */
2403 /* A C compound statement that outputs the assembler code for a thunk function,
2404 used to implement C++ virtual function calls with multiple inheritance. The
2405 thunk acts as a wrapper around a virtual function, adjusting the implicit
2406 object parameter before handing control off to the real function.
2408 First, emit code to add the integer DELTA to the location that contains the
2409 incoming first argument. Assume that this argument contains a pointer, and
2410 is the one used to pass the `this' pointer in C++. This is the incoming
2411 argument *before* the function prologue, e.g. `%o0' on a sparc. The
2412 addition must preserve the values of all other incoming arguments.
2414 After the addition, emit code to jump to FUNCTION, which is a
2415 `FUNCTION_DECL'. This is a direct pure jump, not a call, and does not touch
2416 the return address. Hence returning from FUNCTION will return to whoever
2417 called the current `thunk'.
2419 The effect must be as if FUNCTION had been called directly with the adjusted
2420 first argument. This macro is responsible for emitting all of the code for
2421 a thunk function; `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE' are not
2424 The THUNK_FNDECL is redundant. (DELTA and FUNCTION have already been
2425 extracted from it.) It might possibly be useful on some targets, but
2428 If you do not define this macro, the target-independent code in the C++
2429 frontend will generate a less efficient heavyweight thunk that calls
2430 FUNCTION instead of jumping to it. The generic approach does not support
2432 #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
2434 fprintf (FILE, "\tadd r2,#0x%x\n", (DELTA) & 0xFFFF); \
2435 fputs ("\tjmpf ", FILE); \
2436 assemble_name (FILE, XSTR (XEXP (DECL_RTL (function), 0), 0)); \
2437 putc ('\n', FILE); \
2441 /* Generating Code for Profiling. */
2443 /* A C statement or compound statement to output to FILE some assembler code to
2444 call the profiling subroutine `mcount'. Before calling, the assembler code
2445 must load the address of a counter variable into a register where `mcount'
2446 expects to find the address. The name of this variable is `LP' followed by
2447 the number LABELNO, so you would generate the name using `LP%d' in a
2450 The details of how the address should be passed to `mcount' are determined
2451 by your operating system environment, not by GNU CC. To figure them out,
2452 compile a small program for profiling using the system's installed C
2453 compiler and look at the assembler code that results.
2455 This declaration must be present, but it can be an abort if profiling is
2458 #define FUNCTION_PROFILER(FILE, LABELNO) abort ()
2460 /* Define this macro if the code for function profiling should come before the
2461 function prologue. Normally, the profiling code comes after. */
2462 /* #define PROFILE_BEFORE_PROLOGUE */
2464 /* A C statement or compound statement to output to FILE some assembler code to
2465 initialize basic-block profiling for the current object module. The global
2466 compile flag `profile_block_flag' distingishes two profile modes.
2468 profile_block_flag != 2'
2469 Output code to call the subroutine `__bb_init_func' once per
2470 object module, passing it as its sole argument the address of
2471 a block allocated in the object module.
2473 The name of the block is a local symbol made with this
2476 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2478 Of course, since you are writing the definition of
2479 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2480 you can take a short cut in the definition of this macro and
2481 use the name that you know will result.
2483 The first word of this block is a flag which will be nonzero
2484 if the object module has already been initialized. So test
2485 this word first, and do not call `__bb_init_func' if the flag
2486 is nonzero. BLOCK_OR_LABEL contains a unique number which
2487 may be used to generate a label as a branch destination when
2488 `__bb_init_func' will not be called.
2490 Described in assembler language, the code to be output looks
2499 profile_block_flag == 2'
2500 Output code to call the subroutine `__bb_init_trace_func' and
2501 pass two parameters to it. The first parameter is the same as
2502 for `__bb_init_func'. The second parameter is the number of
2503 the first basic block of the function as given by
2504 BLOCK_OR_LABEL. Note that `__bb_init_trace_func' has to be
2505 called, even if the object module has been initialized
2508 Described in assembler language, the code to be output looks
2511 parameter2 <- BLOCK_OR_LABEL
2512 call __bb_init_trace_func */
2513 /* #define FUNCTION_BLOCK_PROFILER (FILE, LABELNO) */
2515 /* A C statement or compound statement to output to FILE some assembler code to
2516 increment the count associated with the basic block number BLOCKNO. The
2517 global compile flag `profile_block_flag' distingishes two profile modes.
2519 profile_block_flag != 2'
2520 Output code to increment the counter directly. Basic blocks
2521 are numbered separately from zero within each compilation.
2522 The count associated with block number BLOCKNO is at index
2523 BLOCKNO in a vector of words; the name of this array is a
2524 local symbol made with this statement:
2526 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 2);
2528 Of course, since you are writing the definition of
2529 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2530 you can take a short cut in the definition of this macro and
2531 use the name that you know will result.
2533 Described in assembler language, the code to be output looks
2536 inc (LPBX2+4*BLOCKNO)
2538 profile_block_flag == 2'
2539 Output code to initialize the global structure `__bb' and
2540 call the function `__bb_trace_func', which will increment the
2543 `__bb' consists of two words. In the first word, the current
2544 basic block number, as given by BLOCKNO, has to be stored. In
2545 the second word, the address of a block allocated in the
2546 object module has to be stored. The address is given by the
2547 label created with this statement:
2549 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2551 Described in assembler language, the code to be output looks
2553 move BLOCKNO -> (__bb)
2554 move LPBX0 -> (__bb+4)
2555 call __bb_trace_func */
2556 /* #define BLOCK_PROFILER(FILE, BLOCKNO) */
2558 /* A C statement or compound statement to output to FILE assembler
2559 code to call function `__bb_trace_ret'. The assembler code should
2560 only be output if the global compile flag `profile_block_flag' ==
2561 2. This macro has to be used at every place where code for
2562 returning from a function is generated (e.g. `FUNCTION_EPILOGUE').
2563 Although you have to write the definition of `FUNCTION_EPILOGUE'
2564 as well, you have to define this macro to tell the compiler, that
2565 the proper call to `__bb_trace_ret' is produced. */
2566 /* #define FUNCTION_BLOCK_PROFILER_EXIT(FILE) */
2568 /* A C statement or compound statement to save all registers, which may be
2569 clobbered by a function call, including condition codes. The `asm'
2570 statement will be mostly likely needed to handle this task. Local labels in
2571 the assembler code can be concatenated with the string ID, to obtain a
2574 Registers or condition codes clobbered by `FUNCTION_PROLOGUE' or
2575 `FUNCTION_EPILOGUE' must be saved in the macros `FUNCTION_BLOCK_PROFILER',
2576 `FUNCTION_BLOCK_PROFILER_EXIT' and `BLOCK_PROFILER' prior calling
2577 `__bb_init_trace_func', `__bb_trace_ret' and `__bb_trace_func' respectively. */
2578 /* #define MACHINE_STATE_SAVE(ID) */
2580 /* A C statement or compound statement to restore all registers, including
2581 condition codes, saved by `MACHINE_STATE_SAVE'.
2583 Registers or condition codes clobbered by `FUNCTION_PROLOGUE' or
2584 `FUNCTION_EPILOGUE' must be restored in the macros
2585 `FUNCTION_BLOCK_PROFILER', `FUNCTION_BLOCK_PROFILER_EXIT' and
2586 `BLOCK_PROFILER' after calling `__bb_init_trace_func', `__bb_trace_ret' and
2587 `__bb_trace_func' respectively. */
2588 /* #define MACHINE_STATE_RESTORE(ID) */
2590 /* A C function or functions which are needed in the library to support block
2592 /* #define BLOCK_PROFILER_CODE */
2595 /* If the target has particular reasons why a function cannot be inlined,
2596 it may define the TARGET_CANNOT_INLINE_P. This macro takes one argument,
2597 the DECL describing the function. The function should NULL if the function
2598 *can* be inlined. Otherwise it should return a pointer to a string containing
2599 a message describing why the function could not be inlined. The message will
2600 displayed if the '-Winline' command line switch has been given. If the message
2601 contains a '%s' sequence, this will be replaced by the name of the function. */
2602 /* #define TARGET_CANNOT_INLINE_P(FN_DECL) stormy16_cannot_inline_p (FN_DECL) */
2604 /* Implementing the Varargs Macros. */
2606 /* If defined, is a C expression that produces the machine-specific code for a
2607 call to `__builtin_saveregs'. This code will be moved to the very beginning
2608 of the function, before any parameter access are made. The return value of
2609 this function should be an RTX that contains the value to use as the return
2610 of `__builtin_saveregs'.
2612 If this macro is not defined, the compiler will output an ordinary call to
2613 the library function `__builtin_saveregs'. */
2614 /* #define EXPAND_BUILTIN_SAVEREGS() */
2616 /* This macro offers an alternative to using `__builtin_saveregs' and defining
2617 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
2618 arguments into the stack so that all the arguments appear to have been
2619 passed consecutively on the stack. Once this is done, you can use the
2620 standard implementation of varargs that works for machines that pass all
2621 their arguments on the stack.
2623 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing
2624 the values that obtain after processing of the named arguments. The
2625 arguments MODE and TYPE describe the last named argument--its machine mode
2626 and its data type as a tree node.
2628 The macro implementation should do two things: first, push onto the stack
2629 all the argument registers *not* used for the named arguments, and second,
2630 store the size of the data thus pushed into the `int'-valued variable whose
2631 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you
2632 store here will serve as additional offset for setting up the stack frame.
2634 Because you must generate code to push the anonymous arguments at compile
2635 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only
2636 useful on machines that have just a single category of argument register and
2637 use it uniformly for all data types.
2639 If the argument SECOND_TIME is nonzero, it means that the arguments of the
2640 function are being analyzed for the second time. This happens for an inline
2641 function, which is not actually compiled until the end of the source file.
2642 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in
2644 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
2645 if (! SECOND_TIME) \
2646 stormy16_setup_incoming_varargs (ARGS_SO_FAR, MODE, TYPE, & PRETEND_ARGS_SIZE)
2648 /* Define this macro if the location where a function argument is passed
2649 depends on whether or not it is a named argument.
2651 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for
2652 varargs and stdarg functions. With this macro defined, the NAMED argument
2653 is always true for named arguments, and false for unnamed arguments. If
2654 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all
2655 arguments are treated as named. Otherwise, all named arguments except the
2656 last are treated as named. */
2657 /* #define STRICT_ARGUMENT_NAMING 1 */
2659 /* Build up the stdarg/varargs va_list type tree, assinging it to NODE. If not
2660 defined, it is assumed that va_list is a void * pointer. */
2661 #define BUILD_VA_LIST_TYPE(NODE) \
2662 ((NODE) = stormy16_build_va_list ())
2664 /* Implement the stdarg/varargs va_start macro. STDARG_P is non-zero if this
2665 is stdarg.h instead of varargs.h. VALIST is the tree of the va_list
2666 variable to initialize. NEXTARG is the machine independent notion of the
2667 'next' argument after the variable arguments. If not defined, a standard
2668 implementation will be defined that works for arguments passed on the stack. */
2669 #define EXPAND_BUILTIN_VA_START(STDARG_P, VALIST, NEXTARG) \
2670 stormy16_expand_builtin_va_start (STDARG_P, VALIST, NEXTARG)
2672 /* Implement the stdarg/varargs va_arg macro. VALIST is the variable of type
2673 va_list as a tree, TYPE is the type passed to va_arg. */
2674 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
2675 stormy16_expand_builtin_va_arg (VALIST, TYPE)
2677 /* Implement the stdarg/varargs va_end macro. VALIST is the variable of type
2678 va_list as a tree. */
2679 /* #define EXPAND_BUILTIN_VA_END(VALIST) */
2682 /* Trampolines for Nested Functions. */
2684 /* A C statement to output, on the stream FILE, assembler code for a block of
2685 data that contains the constant parts of a trampoline. This code should not
2686 include a label--the label is taken care of automatically. */
2687 /* #define TRAMPOLINE_TEMPLATE(FILE) */
2689 /* The name of a subroutine to switch to the section in which the trampoline
2690 template is to be placed. The default is a value of `readonly_data_section',
2691 which places the trampoline in the section containing read-only data. */
2692 /* #define TRAMPOLINE_SECTION */
2694 /* A C expression for the size in bytes of the trampoline, as an integer. */
2695 #define TRAMPOLINE_SIZE 8
2697 /* Alignment required for trampolines, in bits.
2699 If you don't define this macro, the value of `BIGGEST_ALIGNMENT' is used for
2700 aligning trampolines. */
2701 #define TRAMPOLINE_ALIGNMENT 16
2703 /* A C statement to initialize the variable parts of a trampoline. ADDR is an
2704 RTX for the address of the trampoline; FNADDR is an RTX for the address of
2705 the nested function; STATIC_CHAIN is an RTX for the static chain value that
2706 should be passed to the function when it is called. */
2707 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
2708 stormy16_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
2710 /* A C expression to allocate run-time space for a trampoline. The expression
2711 value should be an RTX representing a memory reference to the space for the
2714 If this macro is not defined, by default the trampoline is allocated as a
2715 stack slot. This default is right for most machines. The exceptions are
2716 machines where it is impossible to execute instructions in the stack area.
2717 On such machines, you may have to implement a separate stack, using this
2718 macro in conjunction with `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE'.
2720 FP points to a data structure, a `struct function', which describes the
2721 compilation status of the immediate containing function of the function
2722 which the trampoline is for. Normally (when `ALLOCATE_TRAMPOLINE' is not
2723 defined), the stack slot for the trampoline is in the stack frame of this
2724 containing function. Other allocation strategies probably must do something
2725 analogous with this information. */
2726 /* #define ALLOCATE_TRAMPOLINE(FP) */
2728 /* Implementing trampolines is difficult on many machines because they have
2729 separate instruction and data caches. Writing into a stack location fails
2730 to clear the memory in the instruction cache, so when the program jumps to
2731 that location, it executes the old contents.
2733 Here are two possible solutions. One is to clear the relevant parts of the
2734 instruction cache whenever a trampoline is set up. The other is to make all
2735 trampolines identical, by having them jump to a standard subroutine. The
2736 former technique makes trampoline execution faster; the latter makes
2737 initialization faster.
2739 To clear the instruction cache when a trampoline is initialized, define the
2740 following macros which describe the shape of the cache. */
2742 /* The total size in bytes of the cache. */
2743 /* #define INSN_CACHE_SIZE */
2745 /* The length in bytes of each cache line. The cache is divided into cache
2746 lines which are disjoint slots, each holding a contiguous chunk of data
2747 fetched from memory. Each time data is brought into the cache, an entire
2748 line is read at once. The data loaded into a cache line is always aligned
2749 on a boundary equal to the line size. */
2750 /* #define INSN_CACHE_LINE_WIDTH */
2752 /* The number of alternative cache lines that can hold any particular memory
2754 /* #define INSN_CACHE_DEPTH */
2756 /* Alternatively, if the machine has system calls or instructions to clear the
2757 instruction cache directly, you can define the following macro. */
2759 /* If defined, expands to a C expression clearing the *instruction cache* in
2760 the specified interval. If it is not defined, and the macro INSN_CACHE_SIZE
2761 is defined, some generic code is generated to clear the cache. The
2762 definition of this macro would typically be a series of `asm' statements.
2763 Both BEG and END are both pointer expressions. */
2764 /* #define CLEAR_INSN_CACHE (BEG, END) */
2766 /* To use a standard subroutine, define the following macro. In addition, you
2767 must make sure that the instructions in a trampoline fill an entire cache
2768 line with identical instructions, or else ensure that the beginning of the
2769 trampoline code is always aligned at the same point in its cache line. Look
2770 in `m68k.h' as a guide. */
2772 /* Define this macro if trampolines need a special subroutine to do their work.
2773 The macro should expand to a series of `asm' statements which will be
2774 compiled with GNU CC. They go in a library function named
2775 `__transfer_from_trampoline'.
2777 If you need to avoid executing the ordinary prologue code of a compiled C
2778 function when you jump to the subroutine, you can do so by placing a special
2779 label of your own in the assembler code. Use one `asm' statement to
2780 generate an assembler label, and another to make the label global. Then
2781 trampolines can use that label to jump directly to your special assembler
2783 /* #define TRANSFER_FROM_TRAMPOLINE */
2786 /* Implicit Calls to Library Routines */
2788 /* A C string constant giving the name of the function to call for
2789 multiplication of one signed full-word by another. If you do not define
2790 this macro, the default name is used, which is `__mulsi3', a function
2791 defined in `libgcc.a'. */
2792 /* #define MULSI3_LIBCALL */
2794 /* A C string constant giving the name of the function to call for division of
2795 one signed full-word by another. If you do not define this macro, the
2796 default name is used, which is `__divsi3', a function defined in `libgcc.a'. */
2797 /* #define DIVSI3_LIBCALL */
2799 /* A C string constant giving the name of the function to call for division of
2800 one unsigned full-word by another. If you do not define this macro, the
2801 default name is used, which is `__udivsi3', a function defined in
2803 /* #define UDIVSI3_LIBCALL */
2805 /* A C string constant giving the name of the function to call for the
2806 remainder in division of one signed full-word by another. If you do not
2807 define this macro, the default name is used, which is `__modsi3', a function
2808 defined in `libgcc.a'. */
2809 /* #define MODSI3_LIBCALL */
2811 /* A C string constant giving the name of the function to call for the
2812 remainder in division of one unsigned full-word by another. If you do not
2813 define this macro, the default name is used, which is `__umodsi3', a
2814 function defined in `libgcc.a'. */
2815 /* #define UMODSI3_LIBCALL */
2817 /* A C string constant giving the name of the function to call for
2818 multiplication of one signed double-word by another. If you do not define
2819 this macro, the default name is used, which is `__muldi3', a function
2820 defined in `libgcc.a'. */
2821 /* #define MULDI3_LIBCALL */
2823 /* A C string constant giving the name of the function to call for division of
2824 one signed double-word by another. If you do not define this macro, the
2825 default name is used, which is `__divdi3', a function defined in `libgcc.a'. */
2826 /* #define DIVDI3_LIBCALL */
2828 /* A C string constant giving the name of the function to call for division of
2829 one unsigned full-word by another. If you do not define this macro, the
2830 default name is used, which is `__udivdi3', a function defined in
2832 /* #define UDIVDI3_LIBCALL */
2834 /* A C string constant giving the name of the function to call for the
2835 remainder in division of one signed double-word by another. If you do not
2836 define this macro, the default name is used, which is `__moddi3', a function
2837 defined in `libgcc.a'. */
2838 /* #define MODDI3_LIBCALL */
2840 /* A C string constant giving the name of the function to call for the
2841 remainder in division of one unsigned full-word by another. If you do not
2842 define this macro, the default name is used, which is `__umoddi3', a
2843 function defined in `libgcc.a'. */
2844 /* #define UMODDI3_LIBCALL */
2846 /* Define this macro as a C statement that declares additional library routines
2847 renames existing ones. `init_optabs' calls this macro after initializing all
2848 the normal library routines. */
2849 /* #define INIT_TARGET_OPTABS */
2851 /* The value of `EDOM' on the target machine, as a C integer constant
2852 expression. If you don't define this macro, GNU CC does not attempt to
2853 deposit the value of `EDOM' into `errno' directly. Look in
2854 `/usr/include/errno.h' to find the value of `EDOM' on your system.
2856 If you do not define `TARGET_EDOM', then compiled code reports domain errors
2857 by calling the library function and letting it report the error. If
2858 mathematical functions on your system use `matherr' when there is an error,
2859 then you should leave `TARGET_EDOM' undefined so that `matherr' is used
2861 /* #define TARGET_EDOM */
2863 /* Define this macro as a C expression to create an rtl expression that refers
2864 to the global "variable" `errno'. (On certain systems, `errno' may not
2865 actually be a variable.) If you don't define this macro, a reasonable
2867 /* #define GEN_ERRNO_RTX */
2869 /* Define this macro if GNU CC should generate calls to the System V (and ANSI
2870 C) library functions `memcpy' and `memset' rather than the BSD functions
2871 `bcopy' and `bzero'.
2873 Defined in svr4.h. */
2874 #define TARGET_MEM_FUNCTIONS
2876 /* Define this macro if only `float' arguments cannot be passed to library
2877 routines (so they must be converted to `double'). This macro affects both
2878 how library calls are generated and how the library routines in `libgcc1.c'
2879 accept their arguments. It is useful on machines where floating and fixed
2880 point arguments are passed differently, such as the i860. */
2881 /* #define LIBGCC_NEEDS_DOUBLE */
2883 /* Define this macro to override the type used by the library routines to pick
2884 up arguments of type `float'. (By default, they use a union of `float' and
2887 The obvious choice would be `float'--but that won't work with traditional C
2888 compilers that expect all arguments declared as `float' to arrive as
2889 `double'. To avoid this conversion, the library routines ask for the value
2890 as some other type and then treat it as a `float'.
2892 On some systems, no other type will work for this. For these systems, you
2893 must use `LIBGCC_NEEDS_DOUBLE' instead, to force conversion of the values
2894 `double' before they are passed. */
2895 /* #define FLOAT_ARG_TYPE */
2897 /* Define this macro to override the way library routines redesignate a `float'
2898 argument as a `float' instead of the type it was passed as. The default is
2899 an expression which takes the `float' field of the union. */
2900 /* #define FLOATIFY(PASSED_VALUE) */
2902 /* Define this macro to override the type used by the library routines to
2903 return values that ought to have type `float'. (By default, they use
2906 The obvious choice would be `float'--but that won't work with traditional C
2907 compilers gratuitously convert values declared as `float' into `double'. */
2908 /* #define FLOAT_VALUE_TYPE */
2910 /* Define this macro to override the way the value of a `float'-returning
2911 library routine should be packaged in order to return it. These functions
2912 are actually declared to return type `FLOAT_VALUE_TYPE' (normally `int').
2914 These values can't be returned as type `float' because traditional C
2915 compilers would gratuitously convert the value to a `double'.
2917 A local variable named `intify' is always available when the macro `INTIFY'
2918 is used. It is a union of a `float' field named `f' and a field named `i'
2919 whose type is `FLOAT_VALUE_TYPE' or `int'.
2921 If you don't define this macro, the default definition works by copying the
2922 value through that union. */
2923 /* #define INTIFY(FLOAT_VALUE) */
2925 /* Define this macro as the name of the data type corresponding to `SImode' in
2926 the system's own C compiler.
2928 You need not define this macro if that type is `long int', as it usually is. */
2929 /* #define nongcc_SI_type */
2931 /* Define this macro as the name of the data type corresponding to the
2932 word_mode in the system's own C compiler.
2934 You need not define this macro if that type is `long int', as it usually is. */
2935 /* #define nongcc_word_type */
2937 /* Define these macros to supply explicit C statements to carry out various
2938 arithmetic operations on types `float' and `double' in the library routines
2939 in `libgcc1.c'. See that file for a full list of these macros and their
2942 On most machines, you don't need to define any of these macros, because the
2943 C compiler that comes with the system takes care of doing them. */
2944 /* #define perform_... */
2946 /* Define this macro to generate code for Objective C message sending using the
2947 calling convention of the NeXT system. This calling convention involves
2948 passing the object, the selector and the method arguments all at once to the
2949 method-lookup library function.
2951 The default calling convention passes just the object and the selector to
2952 the lookup function, which returns a pointer to the method. */
2953 /* #define NEXT_OBJC_RUNTIME */
2956 /* Addressing Modes */
2958 /* Define this macro if the machine supports post-increment addressing. */
2959 #define HAVE_POST_INCREMENT 1
2961 /* Similar for other kinds of addressing. */
2962 /* #define HAVE_PRE_INCREMENT 1 */
2963 /* #define HAVE_POST_DECREMENT 1 */
2964 #define HAVE_PRE_DECREMENT 1
2966 /* A C expression that is 1 if the RTX X is a constant which is a valid
2967 address. On most machines, this can be defined as `CONSTANT_P (X)', but a
2968 few machines are more restrictive in which constant addresses are supported.
2970 `CONSTANT_P' accepts integer-values expressions whose values are not
2971 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions
2972 and `const' arithmetic expressions, in addition to `const_int' and
2973 `const_double' expressions. */
2974 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
2976 /* A number, the maximum number of registers that can appear in a valid memory
2977 address. Note that it is up to you to specify a value equal to the maximum
2978 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
2979 #define MAX_REGS_PER_ADDRESS 1
2981 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
2982 RTX) is a legitimate memory address on the target machine for a memory
2983 operand of mode MODE.
2985 It usually pays to define several simpler macros to serve as subroutines for
2986 this one. Otherwise it may be too complicated to understand.
2988 This macro must exist in two variants: a strict variant and a non-strict
2989 one. The strict variant is used in the reload pass. It must be defined so
2990 that any pseudo-register that has not been allocated a hard register is
2991 considered a memory reference. In contexts where some kind of register is
2992 required, a pseudo-register with no hard register must be rejected.
2994 The non-strict variant is used in other passes. It must be defined to
2995 accept all pseudo-registers in every context where some kind of register is
2998 Compiler source files that want to use the strict variant of this macro
2999 define the macro `REG_OK_STRICT'. You should use an `#ifdef REG_OK_STRICT'
3000 conditional to define the strict variant in that case and the non-strict
3003 Subroutines to check for acceptable registers for various purposes (one for
3004 base registers, one for index registers, and so on) are typically among the
3005 subroutines used to define `GO_IF_LEGITIMATE_ADDRESS'. Then only these
3006 subroutine macros need have two variants; the higher levels of macros may be
3007 the same whether strict or not.
3009 Normally, constant addresses which are the sum of a `symbol_ref' and an
3010 integer are stored inside a `const' RTX to mark them as constant.
3011 Therefore, there is no need to recognize such sums specifically as
3012 legitimate addresses. Normally you would simply recognize any `const' as
3015 Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle constant sums that
3016 are not marked with `const'. It assumes that a naked `plus' indicates
3017 indexing. If so, then you *must* reject such naked constant sums as
3018 illegitimate addresses, so that none of them will be given to
3019 `PRINT_OPERAND_ADDRESS'.
3021 On some machines, whether a symbolic address is legitimate depends on the
3022 section that the address refers to. On these machines, define the macro
3023 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
3024 then check for it here. When you see a `const', you will have to look
3025 inside it to find the `symbol_ref' in order to determine the section.
3027 The best way to modify the name string is by adding text to the beginning,
3028 with suitable punctuation to prevent any ambiguity. Allocate the new name
3029 in `saveable_obstack'. You will have to modify `ASM_OUTPUT_LABELREF' to
3030 remove and decode the added text and output the name accordingly, and define
3031 `STRIP_NAME_ENCODING' to access the original name string.
3033 You can check the information stored here into the `symbol_ref' in the
3034 definitions of the macros `GO_IF_LEGITIMATE_ADDRESS' and
3035 `PRINT_OPERAND_ADDRESS'. */
3036 #ifdef REG_OK_STRICT
3037 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
3039 if (stormy16_legitimate_address_p (MODE, X, 1)) \
3043 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
3045 if (stormy16_legitimate_address_p (MODE, X, 0)) \
3049 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3050 use as a base register. For hard registers, it should always accept those
3051 which the hardware permits and reject the others. Whether the macro accepts
3052 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
3053 described above. This usually requires two variant definitions, of which
3054 `REG_OK_STRICT' controls the one actually used. */
3055 #ifdef REG_OK_STRICT
3056 #define REG_OK_FOR_BASE_P(X) \
3057 (REGNO_OK_FOR_BASE_P (REGNO (X)) && (REGNO (X) < FIRST_PSEUDO_REGISTER))
3059 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
3062 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3063 use as an index register.
3065 The difference between an index register and a base register is that the
3066 index register may be scaled. If an address involves the sum of two
3067 registers, neither one of them scaled, then either one may be labeled the
3068 "base" and the other the "index"; but whichever labeling is used must fit
3069 the machine's constraints of which registers may serve in each capacity.
3070 The compiler will try both labelings, looking for one that is valid, and
3071 will reload one or both registers only if neither labeling works. */
3072 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
3074 /* A C compound statement that attempts to replace X with a valid memory
3075 address for an operand of mode MODE. WIN will be a C statement label
3076 elsewhere in the code; the macro definition may use
3078 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
3080 to avoid further processing if the address has become legitimate.
3082 X will always be the result of a call to `break_out_memory_refs', and OLDX
3083 will be the operand that was given to that function to produce X.
3085 The code generated by this macro should not alter the substructure of X. If
3086 it transforms X into a more legitimate form, it should assign X (which will
3087 always be a C variable) a new value.
3089 It is not necessary for this macro to come up with a legitimate address.
3090 The compiler has standard ways of doing so in all cases. In fact, it is
3091 safe for this macro to do nothing. But often a machine-dependent strategy
3092 can generate better code. */
3093 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
3095 /* A C statement or compound statement with a conditional `goto LABEL;'
3096 executed if memory address X (an RTX) can have different meanings depending
3097 on the machine mode of the memory reference it is used for or if the address
3098 is valid for some modes but not others.
3100 Autoincrement and autodecrement addresses typically have mode-dependent
3101 effects because the amount of the increment or decrement is the size of the
3102 operand being addressed. Some machines have other mode-dependent addresses.
3103 Many RISC machines have no mode-dependent addresses.
3105 You may assume that ADDR is a valid address for the machine.
3107 On this chip, this is true if the address is valid with an offset
3108 of 0 but not of 6, because in that case it cannot be used as an
3109 address for DImode or DFmode, or if the address is a post-increment
3110 or pre-decrement address.
3112 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
3113 if (stormy16_mode_dependent_address_p (ADDR)) \
3116 /* A C expression that is nonzero if X is a legitimate constant for an
3117 immediate operand on the target machine. You can assume that X satisfies
3118 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable
3119 definition for this macro on machines where anything `CONSTANT_P' is valid. */
3120 #define LEGITIMATE_CONSTANT_P(X) 1
3123 /* Condition Code Status */
3125 /* C code for a data type which is used for declaring the `mdep' component of
3126 `cc_status'. It defaults to `int'.
3128 This macro is not used on machines that do not use `cc0'. */
3129 /* #define CC_STATUS_MDEP */
3131 /* A C expression to initialize the `mdep' field to "empty". The default
3132 definition does nothing, since most machines don't use the field anyway. If
3133 you want to use the field, you should probably define this macro to
3136 This macro is not used on machines that do not use `cc0'. */
3137 /* #define CC_STATUS_MDEP_INIT */
3139 /* A C compound statement to set the components of `cc_status' appropriately
3140 for an insn INSN whose body is EXP. It is this macro's responsibility to
3141 recognize insns that set the condition code as a byproduct of other activity
3142 as well as those that explicitly set `(cc0)'.
3144 This macro is not used on machines that do not use `cc0'.
3146 If there are insns that do not set the condition code but do alter other
3147 machine registers, this macro must check to see whether they invalidate the
3148 expressions that the condition code is recorded as reflecting. For example,
3149 on the 68000, insns that store in address registers do not set the condition
3150 code, which means that usually `NOTICE_UPDATE_CC' can leave `cc_status'
3151 unaltered for such insns. But suppose that the previous insn set the
3152 condition code based on location `a4@(102)' and the current insn stores a
3153 new value in `a4'. Although the condition code is not changed by this, it
3154 will no longer be true that it reflects the contents of `a4@(102)'.
3155 Therefore, `NOTICE_UPDATE_CC' must alter `cc_status' in this case to say
3156 that nothing is known about the condition code value.
3158 The definition of `NOTICE_UPDATE_CC' must be prepared to deal with the
3159 results of peephole optimization: insns whose patterns are `parallel' RTXs
3160 containing various `reg', `mem' or constants which are just the operands.
3161 The RTL structure of these insns is not sufficient to indicate what the
3162 insns actually do. What `NOTICE_UPDATE_CC' should do when it sees one is
3163 just to run `CC_STATUS_INIT'.
3165 A possible definition of `NOTICE_UPDATE_CC' is to call a function that looks
3166 at an attribute named, for example, `cc'. This avoids having detailed
3167 information about patterns in two places, the `md' file and in
3168 `NOTICE_UPDATE_CC'. */
3169 /* #define NOTICE_UPDATE_CC(EXP, INSN) */
3171 /* A list of names to be used for additional modes for condition code values in
3172 registers. These names are added to `enum machine_mode' and all have class
3173 `MODE_CC'. By convention, they should start with `CC' and end with `mode'.
3175 You should only define this macro if your machine does not use `cc0' and
3176 only if additional modes are required. */
3177 /* #define EXTRA_CC_MODES */
3179 /* Returns a mode from class `MODE_CC' to be used when comparison operation
3180 code OP is applied to rtx X and Y. For example, on the Sparc,
3181 `SELECT_CC_MODE' is defined as (see *note Jump Patterns::. for a
3182 description of the reason for this definition)
3184 #define SELECT_CC_MODE(OP,X,Y) \
3185 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
3186 ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode) \
3187 : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \
3188 || GET_CODE (X) == NEG) \
3189 ? CC_NOOVmode : CCmode))
3191 You need not define this macro if `EXTRA_CC_MODES' is not defined. */
3192 /* #define SELECT_CC_MODE(OP, X, Y) */
3194 /* One some machines not all possible comparisons are defined, but you can
3195 convert an invalid comparison into a valid one. For example, the Alpha does
3196 not have a `GT' comparison, but you can use an `LT' comparison instead and
3197 swap the order of the operands.
3199 On such machines, define this macro to be a C statement to do any required
3200 conversions. CODE is the initial comparison code and OP0 and OP1 are the
3201 left and right operands of the comparison, respectively. You should modify
3202 CODE, OP0, and OP1 as required.
3204 GNU CC will not assume that the comparison resulting from this macro is
3205 valid but will see if the resulting insn matches a pattern in the `md' file.
3207 You need not define this macro if it would never change the comparison code
3209 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */
3211 /* A C expression whose value is one if it is always safe to reverse a
3212 comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return MODE for
3213 a floating-point inequality comparison, then `REVERSIBLE_CC_MODE (MODE)'
3216 You need not define this macro if it would always returns zero or if the
3217 floating-point format is anything other than `IEEE_FLOAT_FORMAT'. For
3218 example, here is the definition used on the Sparc, where floating-point
3219 inequality comparisons are always given `CCFPEmode':
3221 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) */
3222 /* #define REVERSIBLE_CC_MODE(MODE) */
3225 /* Describing Relative Costs of Operations */
3227 /* A part of a C `switch' statement that describes the relative costs of
3228 constant RTL expressions. It must contain `case' labels for expression
3229 codes `const_int', `const', `symbol_ref', `label_ref' and `const_double'.
3230 Each case must ultimately reach a `return' statement to return the relative
3231 cost of the use of that kind of constant value in an expression. The cost
3232 may depend on the precise value of the constant, which is available for
3233 examination in X, and the rtx code of the expression in which it is
3234 contained, found in OUTER_CODE.
3236 CODE is the expression code--redundant, since it can be obtained with
3238 /* #define CONST_COSTS(X, CODE, OUTER_CODE) */
3240 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be
3241 used, for example, to indicate how costly a multiply instruction is. In
3242 writing this macro, you can use the construct `COSTS_N_INSNS (N)' to specify
3243 a cost equal to N fast instructions. OUTER_CODE is the code of the
3244 expression in which X is contained.
3246 This macro is optional; do not define it if the default cost assumptions are
3247 adequate for the target machine. */
3248 /* #define RTX_COSTS(X, CODE, OUTER_CODE) */
3250 /* An expression giving the cost of an addressing mode that contains ADDRESS.
3251 If not defined, the cost is computed from the ADDRESS expression and the
3252 `CONST_COSTS' values.
3254 For most CISC machines, the default cost is a good approximation of the true
3255 cost of the addressing mode. However, on RISC machines, all instructions
3256 normally have the same length and execution time. Hence all addresses will
3259 In cases where more than one form of an address is known, the form with the
3260 lowest cost will be used. If multiple forms have the same, lowest, cost,
3261 the one that is the most complex will be used.
3263 For example, suppose an address that is equal to the sum of a register and a
3264 constant is used twice in the same basic block. When this macro is not
3265 defined, the address will be computed in a register and memory references
3266 will be indirect through that register. On machines where the cost of the
3267 addressing mode containing the sum is no higher than that of a simple
3268 indirect reference, this will produce an additional instruction and possibly
3269 require an additional register. Proper specification of this macro
3270 eliminates this overhead for such machines.
3272 Similar use of this macro is made in strength reduction of loops.
3274 ADDRESS need not be valid as an address. In such a case, the cost is not
3275 relevant and can be any value; invalid addresses need not be assigned a
3278 On machines where an address involving more than one register is as cheap as
3279 an address computation involving only one register, defining `ADDRESS_COST'
3280 to reflect this can cause two registers to be live over a region of code
3281 where only one would have been if `ADDRESS_COST' were not defined in that
3282 manner. This effect should be considered in the definition of this macro.
3283 Equivalent costs should probably only be given to addresses with different
3284 numbers of registers on machines with lots of registers.
3286 This macro will normally either not be defined or be defined as a constant. */
3287 /* #define ADDRESS_COST(ADDRESS) */
3289 /* A C expression for the cost of moving data of mode MODE from a
3290 register in class FROM to one in class TO. The classes are
3291 expressed using the enumeration values such as `GENERAL_REGS'. A
3292 value of 4 is the default; other values are interpreted relative to
3295 It is not required that the cost always equal 2 when FROM is the same as TO;
3296 on some machines it is expensive to move between registers if they are not
3299 If reload sees an insn consisting of a single `set' between two hard
3300 registers, and if `REGISTER_MOVE_COST' applied to their classes returns a
3301 value of 2, reload does not check to ensure that the constraints of the insn
3302 are met. Setting a cost of other than 2 will allow reload to verify that
3303 the constraints are met. You should do this if the `movM' pattern's
3304 constraints do not allow such copying. */
3305 #define REGISTER_MOVE_COST(MODE, FROM, TO) 2
3307 /* A C expression for the cost of moving data of mode M between a register and
3308 memory. A value of 2 is the default; this cost is relative to those in
3309 `REGISTER_MOVE_COST'.
3311 If moving between registers and memory is more expensive than between two
3312 registers, you should define this macro to express the relative cost. */
3313 #define MEMORY_MOVE_COST(M,C,I) 5
3315 /* A C expression for the cost of a branch instruction. A value of 1 is the
3316 default; other values are interpreted relative to that. */
3318 #define BRANCH_COST 5
3320 /* Here are additional macros which do not specify precise relative costs, but
3321 only that certain actions are more expensive than GNU CC would ordinarily
3324 /* Define this macro as a C expression which is nonzero if accessing less than
3325 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
3326 word of memory, i.e., if such access require more than one instruction or if
3327 there is no difference in cost between byte and (aligned) word loads.
3329 When this macro is not defined, the compiler will access a field by finding
3330 the smallest containing object; when it is defined, a fullword load will be
3331 used if alignment permits. Unless bytes accesses are faster than word
3332 accesses, using word accesses is preferable since it may eliminate
3333 subsequent memory access if subsequent accesses occur to other fields in the
3334 same word of the structure, but to different bytes. */
3335 #define SLOW_BYTE_ACCESS 0
3337 /* Define this macro if zero-extension (of a `char' or `short' to an `int') can
3338 be done faster if the destination is a register that is known to be zero.
3340 If you define this macro, you must have instruction patterns that recognize
3341 RTL structures like this:
3343 (set (strict_low_part (subreg:QI (reg:SI ...) 0)) ...)
3345 and likewise for `HImode'. */
3346 #define SLOW_ZERO_EXTEND 0
3348 /* Define this macro to be the value 1 if unaligned accesses have a cost many
3349 times greater than aligned accesses, for example if they are emulated in a
3352 When this macro is non-zero, the compiler will act as if `STRICT_ALIGNMENT'
3353 were non-zero when generating code for block moves. This can cause
3354 significantly more instructions to be produced. Therefore, do not set this
3355 macro non-zero if unaligned accesses only add a cycle or two to the time for
3358 If the value of this macro is always zero, it need not be defined. */
3359 /* #define SLOW_UNALIGNED_ACCESS */
3361 /* Define this macro to inhibit strength reduction of memory addresses. (On
3362 some machines, such strength reduction seems to do harm rather than good.) */
3363 /* #define DONT_REDUCE_ADDR */
3365 /* The number of scalar move insns which should be generated instead of a
3366 string move insn or a library call. Increasing the value will always make
3367 code faster, but eventually incurs high cost in increased code size.
3369 If you don't define this, a reasonable default is used. */
3370 /* #define MOVE_RATIO */
3372 /* Define this macro if it is as good or better to call a constant function
3373 address than to call an address kept in a register. */
3374 #define NO_FUNCTION_CSE
3376 /* Define this macro if it is as good or better for a function to call itself
3377 with an explicit address than to call an address kept in a register. */
3378 #define NO_RECURSIVE_FUNCTION_CSE
3380 /* A C statement (sans semicolon) to update the integer variable COST based on
3381 the relationship between INSN that is dependent on DEP_INSN through the
3382 dependence LINK. The default is to make no adjustment to COST. This can be
3383 used for example to specify to the scheduler that an output- or
3384 anti-dependence does not incur the same cost as a data-dependence. */
3385 /* #define ADJUST_COST(INSN, LINK, DEP_INSN, COST) */
3387 /* A C statement (sans semicolon) to update the integer scheduling
3388 priority `INSN_PRIORITY(INSN)'. Reduce the priority to execute
3389 the INSN earlier, increase the priority to execute INSN later.
3390 Do not define this macro if you do not need to adjust the
3391 scheduling priorities of insns. */
3392 /* #define ADJUST_PRIORITY (INSN) */
3395 /* Dividing the output into sections. */
3397 /* A C expression whose value is a string containing the assembler operation
3398 that should precede instructions and read-only data. Normally `".text"' is
3400 #define TEXT_SECTION_ASM_OP ".text"
3402 /* A C expression whose value is a string containing the assembler operation to
3403 identify the following data as writable initialized data. Normally
3404 `".data"' is right. */
3405 #define DATA_SECTION_ASM_OP ".data"
3407 /* if defined, a C expression whose value is a string containing the assembler
3408 operation to identify the following data as shared data. If not defined,
3409 `DATA_SECTION_ASM_OP' will be used. */
3410 /* #define SHARED_SECTION_ASM_OP */
3412 /* If defined, a C expression whose value is a string containing the
3413 assembler operation to identify the following data as
3414 uninitialized global data. If not defined, and neither
3415 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
3416 uninitialized global data will be output in the data section if
3417 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
3419 #define BSS_SECTION_ASM_OP ".bss"
3421 /* If defined, a C expression whose value is a string containing the
3422 assembler operation to identify the following data as
3423 uninitialized global shared data. If not defined, and
3424 `BSS_SECTION_ASM_OP' is, the latter will be used. */
3425 /* #define SHARED_BSS_SECTION_ASM_OP */
3427 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
3428 There are no shared libraries on this target so these sections need
3431 Defined in elfos.h. */
3433 #undef CTORS_SECTION_ASM_OP
3434 #undef DTORS_SECTION_ASM_OP
3435 #define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"a\""
3436 #define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"a\""
3438 /* A list of names for sections other than the standard two, which are
3439 `in_text' and `in_data'. You need not define this macro on a system with no
3440 other sections (that GCC needs to use).
3442 Defined in svr4.h. */
3443 /* #define EXTRA_SECTIONS */
3445 /* One or more functions to be defined in `varasm.c'. These functions should
3446 do jobs analogous to those of `text_section' and `data_section', for your
3447 additional sections. Do not define this macro if you do not define
3450 Defined in svr4.h. */
3451 /* #define EXTRA_SECTION_FUNCTIONS */
3453 /* On most machines, read-only variables, constants, and jump tables are placed
3454 in the text section. If this is not the case on your machine, this macro
3455 should be defined to be the name of a function (either `data_section' or a
3456 function defined in `EXTRA_SECTIONS') that switches to the section to be
3457 used for read-only items.
3459 If these items should be placed in the text section, this macro should not
3461 /* #define READONLY_DATA_SECTION */
3463 /* A C statement or statements to switch to the appropriate section for output
3464 of EXP. You can assume that EXP is either a `VAR_DECL' node or a constant
3465 of some sort. RELOC indicates whether the initial value of EXP requires
3466 link-time relocations. Select the section by calling `text_section' or one
3467 of the alternatives for other sections.
3469 Do not define this macro if you put all read-only variables and constants in
3470 the read-only data section (usually the text section).
3472 Defined in svr4.h. */
3473 /* #define SELECT_SECTION(EXP, RELOC) */
3475 /* A C statement or statements to switch to the appropriate section for output
3476 of RTX in mode MODE. You can assume that RTX is some kind of constant in
3477 RTL. The argument MODE is redundant except in the case of a `const_int'
3478 rtx. Select the section by calling `text_section' or one of the
3479 alternatives for other sections.
3481 Do not define this macro if you put all constants in the read-only data
3484 Defined in svr4.h. */
3485 /* #define SELECT_RTX_SECTION(MODE, RTX) */
3487 /* Define this macro if jump tables (for `tablejump' insns) should be output in
3488 the text section, along with the assembler instructions. Otherwise, the
3489 readonly data section is used.
3491 This macro is irrelevant if there is no separate readonly data section. */
3492 #define JUMP_TABLES_IN_TEXT_SECTION 1
3494 /* Define this macro if references to a symbol must be treated differently
3495 depending on something about the variable or function named by the symbol
3496 (such as what section it is in).
3498 The macro definition, if any, is executed immediately after the rtl for DECL
3499 has been created and stored in `DECL_RTL (DECL)'. The value of the rtl will
3500 be a `mem' whose address is a `symbol_ref'.
3502 The usual thing for this macro to do is to record a flag in the `symbol_ref'
3503 (such as `SYMBOL_REF_FLAG') or to store a modified name string in the
3504 `symbol_ref' (if one bit is not enough information). */
3505 #define ENCODE_SECTION_INFO(DECL) stormy16_encode_section_info(DECL)
3507 /* Decode SYM_NAME and store the real name part in VAR, sans the characters
3508 that encode section info. Define this macro if `ENCODE_SECTION_INFO' alters
3509 the symbol's name string. */
3510 /* #define STRIP_NAME_ENCODING(VAR, SYM_NAME) */
3512 /* A C statement to build up a unique section name, expressed as a
3513 STRING_CST node, and assign it to `DECL_SECTION_NAME (DECL)'.
3514 RELOC indicates whether the initial value of EXP requires
3515 link-time relocations. If you do not define this macro, GNU CC
3516 will use the symbol name prefixed by `.' as the section name.
3518 Defined in svr4.h. */
3519 /* #define UNIQUE_SECTION(DECL, RELOC) */
3522 /* Position Independent Code. */
3524 /* The register number of the register used to address a table of static data
3525 addresses in memory. In some cases this register is defined by a
3526 processor's "application binary interface" (ABI). When this macro is
3527 defined, RTL is generated for this register once, as with the stack pointer
3528 and frame pointer registers. If this macro is not defined, it is up to the
3529 machine-dependent files to allocate such a register (if necessary). */
3530 /* #define PIC_OFFSET_TABLE_REGNUM */
3532 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is
3533 clobbered by calls. Do not define this macro if `PPIC_OFFSET_TABLE_REGNUM'
3535 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */
3537 /* By generating position-independent code, when two different programs (A and
3538 B) share a common library (libC.a), the text of the library can be shared
3539 whether or not the library is linked at the same address for both programs.
3540 In some of these environments, position-independent code requires not only
3541 the use of different addressing modes, but also special code to enable the
3542 use of these addressing modes.
3544 The `FINALIZE_PIC' macro serves as a hook to emit these special codes once
3545 the function is being compiled into assembly code, but not before. (It is
3546 not done before, because in the case of compiling an inline function, it
3547 would lead to multiple PIC prologues being included in functions which used
3548 inline functions and were compiled to assembly language.) */
3549 /* #define FINALIZE_PIC */
3551 /* A C expression that is nonzero if X is a legitimate immediate operand on the
3552 target machine when generating position independent code. You can assume
3553 that X satisfies `CONSTANT_P', so you need not check this. You can also
3554 assume FLAG_PIC is true, so you need not check it either. You need not
3555 define this macro if all constants (including `SYMBOL_REF') can be immediate
3556 operands when generating position independent code. */
3557 /* #define LEGITIMATE_PIC_OPERAND_P(X) */
3560 /* The Overall Framework of an Assembler File. */
3562 /* A C expression which outputs to the stdio stream STREAM some appropriate
3563 text to go at the start of an assembler file.
3565 Normally this macro is defined to output a line containing `#NO_APP', which
3566 is a comment that has no effect on most assemblers but tells the GNU
3567 assembler that it can save time by not checking for certain assembler
3570 On systems that use SDB, it is necessary to output certain commands; see
3573 Defined in svr4.h. */
3574 /* #define ASM_FILE_START(STREAM) */
3576 /* A C expression which outputs to the stdio stream STREAM some appropriate
3577 text to go at the end of an assembler file.
3579 If this macro is not defined, the default is to output nothing special at
3580 the end of the file. Most systems don't require any definition.
3582 On systems that use SDB, it is necessary to output certain commands; see
3585 Defined in svr4.h. */
3586 /* #define ASM_FILE_END(STREAM) */
3588 /* A C statement to output assembler commands which will identify the object
3589 file as having been compiled with GNU CC (or another GNU compiler).
3591 If you don't define this macro, the string `gcc_compiled.:' is output. This
3592 string is calculated to define a symbol which, on BSD systems, will never be
3593 defined for any other reason. GDB checks for the presence of this symbol
3594 when reading the symbol table of an executable.
3596 On non-BSD systems, you must arrange communication with GDB in some other
3597 fashion. If GDB is not used on your system, you can define this macro with
3600 Defined in svr4.h. */
3601 /* #define ASM_IDENTIFY_GCC(FILE) */
3603 /* Like ASM_IDENTIFY_GCC, but used when dbx debugging is selected to emit
3604 a stab the debugger uses to identify gcc as the compiler that is emitted
3605 after the stabs for the filename, which makes it easier for GDB to parse.
3607 Defined in svr4.h. */
3608 /* #define ASM_IDENTIFY_GCC_AFTER_SOURCE(FILE) */
3610 /* A C string constant describing how to begin a comment in the target
3611 assembler language. The compiler assumes that the comment will end at the
3613 /* #define ASM_COMMENT_START */
3615 /* A C string constant for text to be output before each `asm' statement or
3616 group of consecutive ones. Normally this is `"#APP"', which is a comment
3617 that has no effect on most assemblers but tells the GNU assembler that it
3618 must check the lines that follow for all valid assembler constructs. */
3619 #define ASM_APP_ON "#APP\n"
3621 /* A C string constant for text to be output after each `asm' statement or
3622 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
3623 GNU assembler to resume making the time-saving assumptions that are valid
3624 for ordinary compiler output. */
3625 #define ASM_APP_OFF "#NO_APP\n"
3627 /* A C statement to output COFF information or DWARF debugging information
3628 which indicates that filename NAME is the current source file to the stdio
3631 This macro need not be defined if the standard form of output for the file
3632 format in use is appropriate. */
3633 /* #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
3635 /* A C statement to output DBX or SDB debugging information before code for
3636 line number LINE of the current source file to the stdio stream STREAM.
3638 This macro need not be defined if the standard form of debugging information
3639 for the debugger in use is appropriate.
3641 Defined in svr4.h. */
3642 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) */
3644 /* A C statement to output something to the assembler file to handle a `#ident'
3645 directive containing the text STRING. If this macro is not defined, nothing
3646 is output for a `#ident' directive.
3648 Defined in svr4.h. */
3649 /* #define ASM_OUTPUT_IDENT(STREAM, STRING) */
3651 /* A C statement to output something to the assembler file to switch to section
3652 NAME for object DECL which is either a `FUNCTION_DECL', a `VAR_DECL' or
3653 `NULL_TREE'. Some target formats do not support arbitrary sections. Do not
3654 define this macro in such cases.
3656 At present this macro is only used to support section attributes. When this
3657 macro is undefined, section attributes are disabled.
3659 Defined in svr4.h. */
3660 /* #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME) */
3662 /* A C statement to output any assembler statements which are required to
3663 precede any Objective C object definitions or message sending. The
3664 statement is executed only when compiling an Objective C program. */
3665 /* #define OBJC_PROLOGUE */
3668 /* Output of Data. */
3670 /* A C statement to output to the stdio stream STREAM an assembler instruction
3671 to assemble a floating-point constant of `TFmode', `DFmode', `SFmode',
3672 `TQFmode', `HFmode', or `QFmode', respectively, whose value is VALUE. VALUE
3673 will be a C expression of type `REAL_VALUE_TYPE'. Macros such as
3674 `REAL_VALUE_TO_TARGET_DOUBLE' are useful for writing these definitions. */
3676 /* This is how to output an assembler line defining a `double'. */
3677 #define ASM_OUTPUT_DOUBLE(STREAM,VALUE) \
3678 do { char dstr[30]; \
3679 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
3680 fprintf ((STREAM), "\t.double %s\n", dstr); \
3683 /* This is how to output an assembler line defining a `float' constant. */
3684 #define ASM_OUTPUT_FLOAT(STREAM,VALUE) \
3685 do { char dstr[30]; \
3686 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
3687 fprintf ((STREAM), "\t.float %s\n", dstr); \
3690 /* #define ASM_OUTPUT_LONG_DOUBLE(STREAM, VALUE) */
3691 /* #define ASM_OUTPUT_THREE_QUARTER_FLOAT(STREAM, VALUE) */
3692 /* #define ASM_OUTPUT_SHORT_FLOAT(STREAM, VALUE) */
3693 /* #define ASM_OUTPUT_BYTE_FLOAT(STREAM, VALUE) */
3695 /* A C statement to output to the stdio stream STREAM an assembler instruction
3696 to assemble an integer of 16, 8, 4, 2 or 1 bytes, respectively, whose value
3697 is VALUE. The argument EXP will be an RTL expression which represents a
3698 constant value. Use `output_addr_const (STREAM, EXP)' to output this value
3699 as an assembler expression.
3701 For sizes larger than `UNITS_PER_WORD', if the action of a macro would be
3702 identical to repeatedly calling the macro corresponding to a size of
3703 `UNITS_PER_WORD', once for each word, you need not define the macro. */
3704 /* #define ASM_OUTPUT_QUADRUPLE_INT(STREAM, EXP) */
3705 /* #define ASM_OUTPUT_DOUBLE_INT(STREAM, EXP) */
3707 /* This is how to output an assembler line defining a `char' constant. */
3708 #define ASM_OUTPUT_CHAR(FILE, VALUE) \
3710 fprintf (FILE, "\t.byte\t"); \
3711 output_addr_const (FILE, (VALUE)); \
3712 fprintf (FILE, "\n"); \
3715 /* This is how to output an assembler line defining a `short' constant. */
3716 #define ASM_OUTPUT_SHORT(FILE, VALUE) \
3718 fprintf (FILE, "\t.hword\t"); \
3719 output_addr_const (FILE, (VALUE)); \
3720 fprintf (FILE, "\n"); \
3723 /* This is how to output an assembler line defining an `int' constant.
3724 We also handle symbol output here. */
3725 #define ASM_OUTPUT_INT(FILE, VALUE) \
3727 fprintf (FILE, "\t.word\t"); \
3728 output_addr_const (FILE, (VALUE)); \
3729 fprintf (FILE, "\n"); \
3732 /* A C statement to output to the stdio stream STREAM an assembler instruction
3733 to assemble a single byte containing the number VALUE.
3735 This declaration must be present. */
3736 #define ASM_OUTPUT_BYTE(STREAM, VALUE) \
3737 fprintf (STREAM, "\t%s\t0x%x\n", ASM_BYTE_OP, (VALUE))
3739 /* A C string constant giving the pseudo-op to use for a sequence of
3740 single-byte constants. If this macro is not defined, the default
3743 Defined in svr4.h. */
3744 /* #define ASM_BYTE_OP */
3746 /* A C statement to output to the stdio stream STREAM an assembler instruction
3747 to assemble a string constant containing the LEN bytes at PTR. PTR will be
3748 a C expression of type `char *' and LEN a C expression of type `int'.
3750 If the assembler has a `.ascii' pseudo-op as found in the Berkeley Unix
3751 assembler, do not define the macro `ASM_OUTPUT_ASCII'.
3753 Defined in svr4.h. */
3754 /* #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) */
3756 /* You may define this macro as a C expression. You should define the
3757 expression to have a non-zero value if GNU CC should output the
3758 constant pool for a function before the code for the function, or
3759 a zero value if GNU CC should output the constant pool after the
3760 function. If you do not define this macro, the usual case, GNU CC
3761 will output the constant pool before the function. */
3762 /* #define CONSTANT_POOL_BEFORE_FUNCTION */
3764 /* A C statement to output assembler commands to define the start of the
3765 constant pool for a function. FUNNAME is a string giving the name of the
3766 function. Should the return type of the function be required, it can be
3767 obtained via FUNDECL. SIZE is the size, in bytes, of the constant pool that
3768 will be written immediately after this call.
3770 If no constant-pool prefix is required, the usual case, this macro need not
3772 /* #define ASM_OUTPUT_POOL_PROLOGUE(FILE FUNNAME FUNDECL SIZE) */
3774 /* A C statement (with or without semicolon) to output a constant in the
3775 constant pool, if it needs special treatment. (This macro need not do
3776 anything for RTL expressions that can be output normally.)
3778 The argument FILE is the standard I/O stream to output the assembler code
3779 on. X is the RTL expression for the constant to output, and MODE is the
3780 machine mode (in case X is a `const_int'). ALIGN is the required alignment
3781 for the value X; you should output an assembler directive to force this much
3784 The argument LABELNO is a number to use in an internal label for the address
3785 of this pool entry. The definition of this macro is responsible for
3786 outputting the label definition at the proper place. Here is how to do
3789 ASM_OUTPUT_INTERNAL_LABEL (FILE, "LC", LABELNO);
3791 When you output a pool entry specially, you should end with a `goto' to the
3792 label JUMPTO. This will prevent the same pool entry from being output a
3793 second time in the usual manner.
3795 You need not define this macro if it would do nothing. */
3796 /* #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) */
3798 /* Define this macro as a C expression which is nonzero if the constant EXP, of
3799 type `tree', should be output after the code for a function. The compiler
3800 will normally output all constants before the function; you need not define
3801 this macro if this is OK. */
3802 /* #define CONSTANT_AFTER_FUNCTION_P(EXP) */
3804 /* A C statement to output assembler commands to at the end of the constant
3805 pool for a function. FUNNAME is a string giving the name of the function.
3806 Should the return type of the function be required, you can obtain it via
3807 FUNDECL. SIZE is the size, in bytes, of the constant pool that GNU CC wrote
3808 immediately before this call.
3810 If no constant-pool epilogue is required, the usual case, you need not
3811 define this macro. */
3812 /* #define ASM_OUTPUT_POOL_EPILOGUE (FILE FUNNAME FUNDECL SIZE) */
3814 /* Define this macro as a C expression which is nonzero if C is used as a
3815 logical line separator by the assembler.
3817 If you do not define this macro, the default is that only the character `;'
3818 is treated as a logical line separator. */
3819 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '|')
3821 /* These macros are provided by `real.h' for writing the definitions of
3822 `ASM_OUTPUT_DOUBLE' and the like: */
3824 /* These translate X, of type `REAL_VALUE_TYPE', to the target's floating point
3825 representation, and store its bit pattern in the array of `long int' whose
3826 address is L. The number of elements in the output array is determined by
3827 the size of the desired target floating point data type: 32 bits of it go in
3828 each `long int' array element. Each array element holds 32 bits of the
3829 result, even if `long int' is wider than 32 bits on the host machine.
3831 The array element values are designed so that you can print them out using
3832 `fprintf' in the order they should appear in the target machine's memory. */
3833 /* #define REAL_VALUE_TO_TARGET_SINGLE(X, L) */
3834 /* #define REAL_VALUE_TO_TARGET_DOUBLE(X, L) */
3835 /* #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(X, L) */
3837 /* This macro converts X, of type `REAL_VALUE_TYPE', to a decimal number and
3838 stores it as a string into STRING. You must pass, as STRING, the address of
3839 a long enough block of space to hold the result.
3841 The argument FORMAT is a `printf'-specification that serves as a suggestion
3842 for how to format the output string. */
3843 /* #define REAL_VALUE_TO_DECIMAL(X, FORMAT, STRING) */
3846 /* Output of Uninitialized Variables. */
3848 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3849 assembler definition of a common-label named NAME whose size is SIZE bytes.
3850 The variable ROUNDED is the size rounded up to whatever alignment the caller
3853 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
3854 before and after that, output the additional assembler syntax for defining
3855 the name, and a newline.
3857 This macro controls how the assembler definitions of uninitialized global
3858 variables are output. */
3859 /* #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) */
3861 /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a separate,
3862 explicit argument. If you define this macro, it is used in place of
3863 `ASM_OUTPUT_COMMON', and gives you more flexibility in handling the required
3864 alignment of the variable. The alignment is specified as the number of
3867 Defined in svr4.h. */
3868 /* #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGNMENT) */
3870 /* Like ASM_OUTPUT_ALIGNED_COMMON except that it takes an additional argument -
3871 the DECL of the variable to be output, if there is one. This macro can be
3872 called with DECL == NULL_TREE. If you define this macro, it is used in
3873 place of both ASM_OUTPUT_COMMON and ASM_OUTPUT_ALIGNED_COMMON, and gives you
3874 more flexibility in handling the destination of the variable. */
3875 /* #define ASM_OUTPUT_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT) */
3877 /* If defined, it is similar to `ASM_OUTPUT_COMMON', except that it is used
3878 when NAME is shared. If not defined, `ASM_OUTPUT_COMMON' will be used. */
3879 /* #define ASM_OUTPUT_SHARED_COMMON(STREAM, NAME, SIZE, ROUNDED) */
3881 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3882 assembler definition of uninitialized global DECL named NAME whose size is
3883 SIZE bytes. The variable ROUNDED is the size rounded up to whatever
3884 alignment the caller wants.
3886 Try to use function `asm_output_bss' defined in `varasm.c' when defining
3887 this macro. If unable, use the expression `assemble_name (STREAM, NAME)' to
3888 output the name itself; before and after that, output the additional
3889 assembler syntax for defining the name, and a newline.
3891 This macro controls how the assembler definitions of uninitialized global
3892 variables are output. This macro exists to properly support languages like
3893 `c++' which do not have `common' data. However, this macro currently is not
3894 defined for all targets. If this macro and `ASM_OUTPUT_ALIGNED_BSS' are not
3895 defined then `ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or
3896 `ASM_OUTPUT_DECL_COMMON' is used. */
3897 /* #define ASM_OUTPUT_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
3899 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate,
3900 explicit argument. If you define this macro, it is used in place of
3901 `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required
3902 alignment of the variable. The alignment is specified as the number of
3905 Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when
3906 defining this macro. */
3907 /* #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
3909 /* If defined, it is similar to `ASM_OUTPUT_BSS', except that it is used when
3910 NAME is shared. If not defined, `ASM_OUTPUT_BSS' will be used. */
3911 /* #define ASM_OUTPUT_SHARED_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
3913 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3914 assembler definition of a local-common-label named NAME whose size is SIZE
3915 bytes. The variable ROUNDED is the size rounded up to whatever alignment
3918 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
3919 before and after that, output the additional assembler syntax for defining
3920 the name, and a newline.
3922 This macro controls how the assembler definitions of uninitialized static
3923 variables are output. */
3924 /* #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) */
3926 /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a separate,
3927 explicit argument. If you define this macro, it is used in place of
3928 `ASM_OUTPUT_LOCAL', and gives you more flexibility in handling the required
3929 alignment of the variable. The alignment is specified as the number of
3932 Defined in svr4.h. */
3933 /* #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGNMENT) */
3935 /* Like `ASM_OUTPUT_ALIGNED_LOCAL' except that it takes an additional
3936 parameter - the DECL of variable to be output, if there is one.
3937 This macro can be called with DECL == NULL_TREE. If you define
3938 this macro, it is used in place of `ASM_OUTPUT_LOCAL' and
3939 `ASM_OUTPUT_ALIGNED_LOCAL', and gives you more flexibility in
3940 handling the destination of the variable. */
3941 /* #define ASM_OUTPUT_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
3943 /* If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is used when
3944 NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will be used. */
3945 /* #define ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED) */
3948 /* Output and Generation of Labels. */
3950 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3951 assembler definition of a label named NAME. Use the expression
3952 `assemble_name (STREAM, NAME)' to output the name itself; before and after
3953 that, output the additional assembler syntax for defining the name, and a
3955 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
3957 assemble_name (STREAM, NAME); \
3958 fputs (":\n", STREAM); \
3961 /* A C statement to output to the stdio stream STREAM the assembler
3962 definition of a symbol named SYMBOL. */
3963 #define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL) \
3965 if (SYMBOL_REF_FLAG (SYMBOL)) \
3967 fputs ("@fptr(", STREAM); \
3968 assemble_name (STREAM, XSTR (SYMBOL, 0)); \
3969 fputc (')', STREAM); \
3972 assemble_name (STREAM, XSTR (SYMBOL, 0)); \
3975 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3976 necessary for declaring the name NAME of a function which is being defined.
3977 This macro is responsible for outputting the label definition (perhaps using
3978 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' tree node
3979 representing the function.
3981 If this macro is not defined, then the function name is defined in the usual
3982 manner as a label (by means of `ASM_OUTPUT_LABEL').
3984 Defined in svr4.h. */
3985 /* #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) */
3987 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3988 necessary for declaring the size of a function which is being defined. The
3989 argument NAME is the name of the function. The argument DECL is the
3990 `FUNCTION_DECL' tree node representing the function.
3992 If this macro is not defined, then the function size is not defined.
3994 Defined in svr4.h. */
3995 /* #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) */
3997 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3998 necessary for declaring the name NAME of an initialized variable which is
3999 being defined. This macro must output the label definition (perhaps using
4000 `ASM_OUTPUT_LABEL'). The argument DECL is the `VAR_DECL' tree node
4001 representing the variable.
4003 If this macro is not defined, then the variable name is defined in the usual
4004 manner as a label (by means of `ASM_OUTPUT_LABEL').
4006 Defined in svr4.h. */
4007 /* #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) */
4009 /* A C statement (sans semicolon) to finish up declaring a variable name once
4010 the compiler has processed its initializer fully and thus has had a chance
4011 to determine the size of an array when controlled by an initializer. This
4012 is used on systems where it's necessary to declare something about the size
4015 If you don't define this macro, that is equivalent to defining it to do
4018 Defined in svr4.h. */
4019 /* #define ASM_FINISH_DECLARE_OBJECT(STREAM, DECL, TOPLEVEL, ATEND) */
4021 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4022 commands that will make the label NAME global; that is, available for
4023 reference from other files. Use the expression `assemble_name (STREAM,
4024 NAME)' to output the name itself; before and after that, output the
4025 additional assembler syntax for making that name global, and a newline. */
4026 #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \
4028 fputs ("\t.globl ", STREAM); \
4029 assemble_name (STREAM, NAME); \
4030 fputs ("\n", STREAM); \
4033 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4034 commands that will make the label NAME weak; that is, available for
4035 reference from other files but only used if no other definition is
4036 available. Use the expression `assemble_name (STREAM, NAME)' to output the
4037 name itself; before and after that, output the additional assembler syntax
4038 for making that name weak, and a newline.
4040 If you don't define this macro, GNU CC will not support weak symbols and you
4041 should not define the `SUPPORTS_WEAK' macro.
4043 Defined in svr4.h. */
4044 /* #define ASM_WEAKEN_LABEL */
4046 /* A C expression which evaluates to true if the target supports weak symbols.
4048 If you don't define this macro, `defaults.h' provides a default definition.
4049 If `ASM_WEAKEN_LABEL' is defined, the default definition is `1'; otherwise,
4050 it is `0'. Define this macro if you want to control weak symbol support
4051 with a compiler flag such as `-melf'. */
4052 /* #define SUPPORTS_WEAK */
4054 /* A C statement (sans semicolon) to mark DECL to be emitted as a
4055 public symbol such that extra copies in multiple translation units
4056 will be discarded by the linker. Define this macro if your object
4057 file format provides support for this concept, such as the `COMDAT'
4058 section flags in the Microsoft Windows PE/COFF format, and this
4059 support requires changes to DECL, such as putting it in a separate
4062 Defined in svr4.h. */
4063 /* #define MAKE_DECL_ONE_ONLY */
4065 /* A C expression which evaluates to true if the target supports one-only
4068 If you don't define this macro, `varasm.c' provides a default definition.
4069 If `MAKE_DECL_ONE_ONLY' is defined, the default definition is `1';
4070 otherwise, it is `0'. Define this macro if you want to control one-only
4071 symbol support with a compiler flag, or if setting the `DECL_ONE_ONLY' flag
4072 is enough to mark a declaration to be emitted as one-only. */
4073 /* #define SUPPORTS_ONE_ONLY */
4075 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4076 necessary for declaring the name of an external symbol named NAME which is
4077 referenced in this compilation but not defined. The value of DECL is the
4078 tree node for the declaration.
4080 This macro need not be defined if it does not need to output anything. The
4081 GNU assembler and most Unix assemblers don't require anything. */
4082 /* #define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) */
4084 /* A C statement (sans semicolon) to output on STREAM an assembler pseudo-op to
4085 declare a library function name external. The name of the library function
4086 is given by SYMREF, which has type `rtx' and is a `symbol_ref'.
4088 This macro need not be defined if it does not need to output anything. The
4089 GNU assembler and most Unix assemblers don't require anything.
4091 Defined in svr4.h. */
4092 /* #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM, SYMREF) */
4094 /* A C statement (sans semicolon) to output to the stdio stream STREAM a
4095 reference in assembler syntax to a label named NAME. This should add `_' to
4096 the front of the name, if that is customary on your operating system, as it
4097 is in most Berkeley Unix systems. This macro is used in `assemble_name'. */
4098 /* #define ASM_OUTPUT_LABELREF(STREAM, NAME) */
4100 /* A C statement to output to the stdio stream STREAM a label whose name is
4101 made from the string PREFIX and the number NUM.
4103 It is absolutely essential that these labels be distinct from the labels
4104 used for user-level functions and variables. Otherwise, certain programs
4105 will have name conflicts with internal labels.
4107 It is desirable to exclude internal labels from the symbol table of the
4108 object file. Most assemblers have a naming convention for labels that
4109 should be excluded; on many systems, the letter `L' at the beginning of a
4110 label has this effect. You should find out what convention your system
4111 uses, and follow it.
4113 The usual definition of this macro is as follows:
4115 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM)
4117 Defined in svr4.h. */
4118 /* #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) */
4120 /* A C statement to store into the string STRING a label whose name is made
4121 from the string PREFIX and the number NUM.
4123 This string, when output subsequently by `assemble_name', should produce the
4124 output that `ASM_OUTPUT_INTERNAL_LABEL' would produce with the same PREFIX
4127 If the string begins with `*', then `assemble_name' will output the rest of
4128 the string unchanged. It is often convenient for
4129 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the string doesn't
4130 start with `*', then `ASM_OUTPUT_LABELREF' gets to output the string, and
4131 may change it. (Of course, `ASM_OUTPUT_LABELREF' is also part of your
4132 machine description, so you should know what it does on your machine.)
4134 Defined in svr4.h. */
4135 /* #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) */
4137 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a
4138 newly allocated string made from the string NAME and the number NUMBER, with
4139 some suitable punctuation added. Use `alloca' to get space for the string.
4141 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce
4142 an assembler label for an internal static variable whose name is NAME.
4143 Therefore, the string must be such as to result in valid assembler code.
4144 The argument NUMBER is different each time this macro is executed; it
4145 prevents conflicts between similarly-named internal static variables in
4148 Ideally this string should not be a valid C identifier, to prevent any
4149 conflict with the user's own symbols. Most assemblers allow periods or
4150 percent signs in assembler symbols; putting at least one of these between
4151 the name and the number will suffice. */
4152 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \
4154 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \
4155 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \
4158 /* A C statement to output to the stdio stream STREAM assembler code which
4159 defines (equates) the symbol NAME to have the value VALUE.
4161 If SET_ASM_OP is defined, a default definition is provided which is correct
4164 Defined in svr4.h. */
4165 /* #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) */
4167 /* A C statement to output to the stdio stream STREAM assembler code which
4168 defines (equates) the weak symbol NAME to have the value VALUE.
4170 Define this macro if the target only supports weak aliases; define
4171 ASM_OUTPUT_DEF instead if possible. */
4172 /* #define ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE) */
4174 /* Define this macro to override the default assembler names used for Objective
4177 The default name is a unique method number followed by the name of the class
4178 (e.g. `_1_Foo'). For methods in categories, the name of the category is
4179 also included in the assembler name (e.g. `_1_Foo_Bar').
4181 These names are safe on most systems, but make debugging difficult since the
4182 method's selector is not present in the name. Therefore, particular systems
4183 define other ways of computing names.
4185 BUF is an expression of type `char *' which gives you a buffer in which to
4186 store the name; its length is as long as CLASS_NAME, CAT_NAME and SEL_NAME
4187 put together, plus 50 characters extra.
4189 The argument IS_INST specifies whether the method is an instance method or a
4190 class method; CLASS_NAME is the name of the class; CAT_NAME is the name of
4191 the category (or NULL if the method is not in a category); and SEL_NAME is
4192 the name of the selector.
4194 On systems where the assembler can handle quoted names, you can use this
4195 macro to provide more human-readable names. */
4196 /* #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME) */
4199 /* Macros Controlling Initialization Routines. */
4201 /* If defined, a C string constant for the assembler operation to identify the
4202 following data as initialization code. If not defined, GNU CC will assume
4203 such a section does not exist. When you are using special sections for
4204 initialization and termination functions, this macro also controls how
4205 `crtstuff.c' and `libgcc2.c' arrange to run the initialization functions.
4207 Defined in svr4.h. */
4208 /* #define INIT_SECTION_ASM_OP */
4210 /* If defined, `main' will not call `__main' as described above. This macro
4211 should be defined for systems that control the contents of the init section
4212 on a symbol-by-symbol basis, such as OSF/1, and should not be defined
4213 explicitly for systems that support `INIT_SECTION_ASM_OP'. */
4214 /* #define HAS_INIT_SECTION */
4216 /* If defined, a C string constant for a switch that tells the linker that the
4217 following symbol is an initialization routine. */
4218 /* #define LD_INIT_SWITCH */
4220 /* If defined, a C string constant for a switch that tells the linker that the
4221 following symbol is a finalization routine. */
4222 /* #define LD_FINI_SWITCH */
4224 /* If defined, `main' will call `__main' despite the presence of
4225 `INIT_SECTION_ASM_OP'. This macro should be defined for systems where the
4226 init section is not actually run automatically, but is still useful for
4227 collecting the lists of constructors and destructors. */
4228 /* #define INVOKE__main */
4230 /* Define this macro as a C statement to output on the stream STREAM the
4231 assembler code to arrange to call the function named NAME at initialization
4234 Assume that NAME is the name of a C function generated automatically by the
4235 compiler. This function takes no arguments. Use the function
4236 `assemble_name' to output the name NAME; this performs any system-specific
4237 syntactic transformations such as adding an underscore.
4239 If you don't define this macro, nothing special is output to arrange to call
4240 the function. This is correct when the function will be called in some
4241 other manner--for example, by means of the `collect2' program, which looks
4242 through the symbol table to find these functions by their names.
4244 Defined in svr4.h. */
4245 /* #define ASM_OUTPUT_CONSTRUCTOR(STREAM, NAME) */
4247 /* This is like `ASM_OUTPUT_CONSTRUCTOR' but used for termination functions
4248 rather than initialization functions.
4250 Defined in svr4.h. */
4251 /* #define ASM_OUTPUT_DESTRUCTOR(STREAM, NAME) */
4253 /* If your system uses `collect2' as the means of processing constructors, then
4254 that program normally uses `nm' to scan an object file for constructor
4255 functions to be called. On certain kinds of systems, you can define these
4256 macros to make `collect2' work faster (and, in some cases, make it work at
4259 /* Define this macro if the system uses COFF (Common Object File Format) object
4260 files, so that `collect2' can assume this format and scan object files
4261 directly for dynamic constructor/destructor functions. */
4262 /* #define OBJECT_FORMAT_COFF */
4264 /* Define this macro if the system uses ROSE format object files, so that
4265 `collect2' can assume this format and scan object files directly for dynamic
4266 constructor/destructor functions.
4268 These macros are effective only in a native compiler; `collect2' as
4269 part of a cross compiler always uses `nm' for the target machine. */
4270 /* #define OBJECT_FORMAT_ROSE */
4272 /* Define this macro if the system uses ELF format object files.
4274 Defined in svr4.h. */
4275 /* #define OBJECT_FORMAT_ELF */
4277 /* Define this macro as a C string constant containing the file name to use to
4278 execute `nm'. The default is to search the path normally for `nm'.
4280 If your system supports shared libraries and has a program to list the
4281 dynamic dependencies of a given library or executable, you can define these
4282 macros to enable support for running initialization and termination
4283 functions in shared libraries: */
4284 /* #define REAL_NM_FILE_NAME */
4286 /* Define this macro to a C string constant containing the name of the program
4287 which lists dynamic dependencies, like `"ldd"' under SunOS 4. */
4288 /* #define LDD_SUFFIX */
4290 /* Define this macro to be C code that extracts filenames from the output of
4291 the program denoted by `LDD_SUFFIX'. PTR is a variable of type `char *'
4292 that points to the beginning of a line of output from `LDD_SUFFIX'. If the
4293 line lists a dynamic dependency, the code must advance PTR to the beginning
4294 of the filename on that line. Otherwise, it must set PTR to `NULL'. */
4295 /* #define PARSE_LDD_OUTPUT (PTR) */
4298 /* Output of Assembler Instructions. */
4300 /* A C initializer containing the assembler's names for the machine registers,
4301 each one as a C string constant. This is what translates register numbers
4302 in the compiler into assembler language. */
4303 #define REGISTER_NAMES \
4304 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", \
4305 "r11", "r12", "r13", "psw", "sp", "carry", "fp", "ap" }
4307 /* If defined, a C initializer for an array of structures containing a name and
4308 a register number. This macro defines additional names for hard registers,
4309 thus allowing the `asm' option in declarations to refer to registers using
4311 #define ADDITIONAL_REGISTER_NAMES \
4315 /* Define this macro if you are using an unusual assembler that requires
4316 different names for the machine instructions.
4318 The definition is a C statement or statements which output an assembler
4319 instruction opcode to the stdio stream STREAM. The macro-operand PTR is a
4320 variable of type `char *' which points to the opcode name in its "internal"
4321 form--the form that is written in the machine description. The definition
4322 should output the opcode name to STREAM, performing any translation you
4323 desire, and increment the variable PTR to point at the end of the opcode so
4324 that it will not be output twice.
4326 In fact, your macro definition may process less than the entire opcode name,
4327 or more than the opcode name; but if you want to process text that includes
4328 `%'-sequences to substitute operands, you must take care of the substitution
4329 yourself. Just be sure to increment PTR over whatever text should not be
4332 If you need to look at the operand values, they can be found as the elements
4333 of `recog_data.operand'.
4335 If the macro definition does nothing, the instruction is output in the usual
4337 /* #define ASM_OUTPUT_OPCODE(STREAM, PTR) */
4339 /* If defined, a C statement to be executed just prior to the output of
4340 assembler code for INSN, to modify the extracted operands so they will be
4343 Here the argument OPVEC is the vector containing the operands extracted from
4344 INSN, and NOPERANDS is the number of elements of the vector which contain
4345 meaningful data for this insn. The contents of this vector are what will be
4346 used to convert the insn template into assembler code, so you can change the
4347 assembler output by changing the contents of the vector.
4349 This macro is useful when various assembler syntaxes share a single file of
4350 instruction patterns; by defining this macro differently, you can cause a
4351 large class of instructions to be output differently (such as with
4352 rearranged operands). Naturally, variations in assembler syntax affecting
4353 individual insn patterns ought to be handled by writing conditional output
4354 routines in those patterns.
4356 If this macro is not defined, it is equivalent to a null statement. */
4357 /* #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) */
4359 /* If defined, `FINAL_PRESCAN_INSN' will be called on each
4360 `CODE_LABEL'. In that case, OPVEC will be a null pointer and
4361 NOPERANDS will be zero. */
4362 /* #define FINAL_PRESCAN_LABEL */
4364 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4365 for an instruction operand X. X is an RTL expression.
4367 CODE is a value that can be used to specify one of several ways of printing
4368 the operand. It is used when identical operands must be printed differently
4369 depending on the context. CODE comes from the `%' specification that was
4370 used to request printing of the operand. If the specification was just
4371 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
4372 the ASCII code for LTR.
4374 If X is a register, this macro should print the register's name. The names
4375 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
4376 is initialized from `REGISTER_NAMES'.
4378 When the machine description has a specification `%PUNCT' (a `%' followed by
4379 a punctuation character), this macro is called with a null pointer for X and
4380 the punctuation character for CODE. */
4381 #define PRINT_OPERAND(STREAM, X, CODE) stormy16_print_operand (STREAM, X, CODE)
4383 /* A C expression which evaluates to true if CODE is a valid punctuation
4384 character for use in the `PRINT_OPERAND' macro. If
4385 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
4386 characters (except for the standard one, `%') are used in this way. */
4387 /* #define PRINT_OPERAND_PUNCT_VALID_P(CODE) */
4389 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4390 for an instruction operand that is a memory reference whose address is X. X
4391 is an RTL expression.
4393 On some machines, the syntax for a symbolic address depends on the section
4394 that the address refers to. On these machines, define the macro
4395 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
4396 then check for it here.
4398 This declaration must be present. */
4399 #define PRINT_OPERAND_ADDRESS(STREAM, X) stormy16_print_operand_address (STREAM, X)
4401 /* A C statement, to be executed after all slot-filler instructions have been
4402 output. If necessary, call `dbr_sequence_length' to determine the number of
4403 slots filled in a sequence (zero if not currently outputting a sequence), to
4404 decide how many no-ops to output, or whatever.
4406 Don't define this macro if it has nothing to do, but it is helpful in
4407 reading assembly output if the extent of the delay sequence is made explicit
4408 (e.g. with white space).
4410 Note that output routines for instructions with delay slots must be prepared
4411 to deal with not being output as part of a sequence (i.e. when the
4412 scheduling pass is not run, or when no slot fillers could be found.) The
4413 variable `final_sequence' is null when not processing a sequence, otherwise
4414 it contains the `sequence' rtx being output. */
4415 /* #define DBR_OUTPUT_SEQEND(FILE) */
4417 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
4418 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a
4419 single `md' file must support multiple assembler formats. In that case, the
4420 various `tm.h' files can define these macros differently.
4422 USER_LABEL_PREFIX is defined in svr4.h. */
4423 #define REGISTER_PREFIX ""
4424 #define LOCAL_LABEL_PREFIX "."
4425 #define USER_LABEL_PREFIX ""
4426 #define IMMEDIATE_PREFIX "#"
4428 /* If your target supports multiple dialects of assembler language (such as
4429 different opcodes), define this macro as a C expression that gives the
4430 numeric index of the assembler language dialect to use, with zero as the
4433 If this macro is defined, you may use `{option0|option1|option2...}'
4434 constructs in the output templates of patterns or in the first argument of
4435 `asm_fprintf'. This construct outputs `option0', `option1' or `option2',
4436 etc., if the value of `ASSEMBLER_DIALECT' is zero, one or two, etc. Any
4437 special characters within these strings retain their usual meaning.
4439 If you do not define this macro, the characters `{', `|' and `}' do not have
4440 any special meaning when used in templates or operands to `asm_fprintf'.
4442 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
4443 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the variations
4444 in assemble language syntax with that mechanism. Define `ASSEMBLER_DIALECT'
4445 and use the `{option0|option1}' syntax if the syntax variant are larger and
4446 involve such things as different opcodes or operand order. */
4447 /* #define ASSEMBLER_DIALECT */
4449 /* A C expression to output to STREAM some assembler code which will push hard
4450 register number REGNO onto the stack. The code need not be optimal, since
4451 this macro is used only when profiling. */
4452 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
4453 fprintf (STREAM, "\tpush %d\n", REGNO)
4455 /* A C expression to output to STREAM some assembler code which will pop hard
4456 register number REGNO off of the stack. The code need not be optimal, since
4457 this macro is used only when profiling. */
4458 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
4459 fprintf (STREAM, "\tpop %d\n", REGNO)
4462 /* Output of dispatch tables. */
4464 /* This port does not use the ASM_OUTPUT_ADDR_VEC_ELT macro, because
4465 this could cause label alignment to appear between the 'br' and the table,
4466 which would be bad. Instead, it controls the output of the table
4468 #define ASM_OUTPUT_ADDR_VEC(LABEL, BODY) \
4469 stormy16_output_addr_vec (file, LABEL, BODY)
4471 /* Alignment for ADDR_VECs is the same as for code. */
4472 #define ADDR_VEC_ALIGN(ADDR_VEC) 1
4475 /* Assembler Commands for Exception Regions. */
4477 /* A C expression to output text to mark the start of an exception region.
4479 This macro need not be defined on most platforms. */
4480 /* #define ASM_OUTPUT_EH_REGION_BEG() */
4482 /* A C expression to output text to mark the end of an exception region.
4484 This macro need not be defined on most platforms. */
4485 /* #define ASM_OUTPUT_EH_REGION_END() */
4487 /* A C expression to switch to the section in which the main exception table is
4488 to be placed. The default is a section named `.gcc_except_table' on machines
4489 that support named sections via `ASM_OUTPUT_SECTION_NAME', otherwise if `-fpic'
4490 or `-fPIC' is in effect, the `data_section', otherwise the
4491 `readonly_data_section'. */
4492 /* #define EXCEPTION_SECTION() */
4494 /* If defined, a C string constant for the assembler operation to switch to the
4495 section for exception handling frame unwind information. If not defined,
4496 GNU CC will provide a default definition if the target supports named
4497 sections. `crtstuff.c' uses this macro to switch to the appropriate
4500 You should define this symbol if your target supports DWARF 2 frame unwind
4501 information and the default definition does not work. */
4502 /* #define EH_FRAME_SECTION_ASM_OP */
4504 /* A C expression that is nonzero if the normal exception table output should
4507 This macro need not be defined on most platforms. */
4508 /* #define OMIT_EH_TABLE() */
4510 /* Alternate runtime support for looking up an exception at runtime and finding
4511 the associated handler, if the default method won't work.
4513 This macro need not be defined on most platforms. */
4514 /* #define EH_TABLE_LOOKUP() */
4516 /* A C expression that decides whether or not the current function needs to
4517 have a function unwinder generated for it. See the file `except.c' for
4518 details on when to define this, and how. */
4519 /* #define DOESNT_NEED_UNWINDER */
4521 /* An rtx used to mask the return address found via RETURN_ADDR_RTX, so that it
4522 does not contain any extraneous set bits in it. */
4523 /* #define MASK_RETURN_ADDR */
4525 /* Define this macro to 0 if your target supports DWARF 2 frame unwind
4526 information, but it does not yet work with exception handling. Otherwise,
4527 if your target supports this information (if it defines
4528 `INCOMING_RETURN_ADDR_RTX' and either `UNALIGNED_INT_ASM_OP' or
4529 `OBJECT_FORMAT_ELF'), GCC will provide a default definition of 1.
4531 If this macro is defined to 1, the DWARF 2 unwinder will be the default
4532 exception handling mechanism; otherwise, setjmp/longjmp will be used by
4535 If this macro is defined to anything, the DWARF 2 unwinder will be used
4536 instead of inline unwinders and __unwind_function in the non-setjmp case. */
4537 /* #define DWARF2_UNWIND_INFO */
4540 /* Assembler Commands for Alignment. */
4542 /* The alignment (log base 2) to put in front of LABEL, which follows
4545 This macro need not be defined if you don't want any special alignment to be
4546 done at such a time. Most machine descriptions do not currently define the
4548 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */
4550 /* The desired alignment for the location counter at the beginning
4553 This macro need not be defined if you don't want any special alignment to be
4554 done at such a time. Most machine descriptions do not currently define the
4556 /* #define LOOP_ALIGN(LABEL) */
4558 /* A C statement to output to the stdio stream STREAM an assembler instruction
4559 to advance the location counter by NBYTES bytes. Those bytes should be zero
4560 when loaded. NBYTES will be a C expression of type `int'.
4562 Defined in elfos.h. */
4563 /* #define ASM_OUTPUT_SKIP(STREAM, NBYTES) */
4565 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text
4566 section because it fails put zeros in the bytes that are skipped. This is
4567 true on many Unix systems, where the pseudo-op to skip bytes produces no-op
4568 instructions rather than zeros when used in the text section. */
4569 /* #define ASM_NO_SKIP_IN_TEXT */
4571 /* A C statement to output to the stdio stream STREAM an assembler command to
4572 advance the location counter to a multiple of 2 to the POWER bytes. POWER
4573 will be a C expression of type `int'. */
4574 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
4575 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
4578 /* Macros Affecting all Debug Formats. */
4580 /* A C expression that returns the DBX register number for the compiler
4581 register number REGNO. In simple cases, the value of this expression may be
4582 REGNO itself. But sometimes there are some registers that the compiler
4583 knows about and DBX does not, or vice versa. In such cases, some register
4584 may need to have one number in the compiler and another for DBX.
4586 If two registers have consecutive numbers inside GNU CC, and they can be
4587 used as a pair to hold a multiword value, then they *must* have consecutive
4588 numbers after renumbering with `DBX_REGISTER_NUMBER'. Otherwise, debuggers
4589 will be unable to access such a pair, because they expect register pairs to
4590 be consecutive in their own numbering scheme.
4592 If you find yourself defining `DBX_REGISTER_NUMBER' in way that does not
4593 preserve register pairs, then what you must do instead is redefine the
4594 actual register numbering scheme.
4596 This declaration is required. */
4597 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
4599 /* A C expression that returns the integer offset value for an automatic
4600 variable having address X (an RTL expression). The default computation
4601 assumes that X is based on the frame-pointer and gives the offset from the
4602 frame-pointer. This is required for targets that produce debugging output
4603 for DBX or COFF-style debugging output for SDB and allow the frame-pointer
4604 to be eliminated when the `-g' options is used. */
4605 /* #define DEBUGGER_AUTO_OFFSET(X) */
4607 /* A C expression that returns the integer offset value for an argument having
4608 address X (an RTL expression). The nominal offset is OFFSET. */
4609 /* #define DEBUGGER_ARG_OFFSET(OFFSET, X) */
4611 /* A C expression that returns the type of debugging output GNU CC produces
4612 when the user specifies `-g' or `-ggdb'. Define this if you have arranged
4613 for GNU CC to support more than one format of debugging output. Currently,
4614 the allowable values are `DBX_DEBUG', `SDB_DEBUG', `DWARF_DEBUG',
4615 `DWARF2_DEBUG', and `XCOFF_DEBUG'.
4617 The value of this macro only affects the default debugging output; the user
4618 can always get a specific type of output by using `-gstabs', `-gcoff',
4619 `-gdwarf-1', `-gdwarf-2', or `-gxcoff'.
4621 Defined in svr4.h. */
4622 #undef PREFERRED_DEBUGGING_TYPE
4623 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
4626 /* Specific Options for DBX Output. */
4628 /* Define this macro if GNU CC should produce debugging output for DBX in
4629 response to the `-g' option.
4631 Defined in svr4.h. */
4632 /* #define DBX_DEBUGGING_INFO */
4634 /* Define this macro if GNU CC should produce XCOFF format debugging output in
4635 response to the `-g' option. This is a variant of DBX format. */
4636 /* #define XCOFF_DEBUGGING_INFO */
4638 /* Define this macro to control whether GNU CC should by default generate GDB's
4639 extended version of DBX debugging information (assuming DBX-format debugging
4640 information is enabled at all). If you don't define the macro, the default
4641 is 1: always generate the extended information if there is any occasion to. */
4642 /* #define DEFAULT_GDB_EXTENSIONS */
4644 /* Define this macro if all `.stabs' commands should be output while in the
4646 /* #define DEBUG_SYMS_TEXT */
4648 /* A C string constant naming the assembler pseudo op to use instead of
4649 `.stabs' to define an ordinary debugging symbol. If you don't define this
4650 macro, `.stabs' is used. This macro applies only to DBX debugging
4651 information format. */
4652 /* #define ASM_STABS_OP */
4654 /* A C string constant naming the assembler pseudo op to use instead of
4655 `.stabd' to define a debugging symbol whose value is the current location.
4656 If you don't define this macro, `.stabd' is used. This macro applies only
4657 to DBX debugging information format. */
4658 /* #define ASM_STABD_OP */
4660 /* A C string constant naming the assembler pseudo op to use instead of
4661 `.stabn' to define a debugging symbol with no name. If you don't define
4662 this macro, `.stabn' is used. This macro applies only to DBX debugging
4663 information format. */
4664 /* #define ASM_STABN_OP */
4666 /* Define this macro if DBX on your system does not support the construct
4667 `xsTAGNAME'. On some systems, this construct is used to describe a forward
4668 reference to a structure named TAGNAME. On other systems, this construct is
4669 not supported at all. */
4670 /* #define DBX_NO_XREFS */
4672 /* A symbol name in DBX-format debugging information is normally continued
4673 (split into two separate `.stabs' directives) when it exceeds a certain
4674 length (by default, 80 characters). On some operating systems, DBX requires
4675 this splitting; on others, splitting must not be done. You can inhibit
4676 splitting by defining this macro with the value zero. You can override the
4677 default splitting-length by defining this macro as an expression for the
4678 length you desire. */
4679 /* #define DBX_CONTIN_LENGTH */
4681 /* Normally continuation is indicated by adding a `\' character to the end of a
4682 `.stabs' string when a continuation follows. To use a different character
4683 instead, define this macro as a character constant for the character you
4684 want to use. Do not define this macro if backslash is correct for your
4686 /* #define DBX_CONTIN_CHAR */
4688 /* Define this macro if it is necessary to go to the data section before
4689 outputting the `.stabs' pseudo-op for a non-global static variable. */
4690 /* #define DBX_STATIC_STAB_DATA_SECTION */
4692 /* The value to use in the "code" field of the `.stabs' directive for a
4693 typedef. The default is `N_LSYM'. */
4694 /* #define DBX_TYPE_DECL_STABS_CODE */
4696 /* The value to use in the "code" field of the `.stabs' directive for a static
4697 variable located in the text section. DBX format does not provide any
4698 "right" way to do this. The default is `N_FUN'. */
4699 /* #define DBX_STATIC_CONST_VAR_CODE */
4701 /* The value to use in the "code" field of the `.stabs' directive for a
4702 parameter passed in registers. DBX format does not provide any "right" way
4703 to do this. The default is `N_RSYM'. */
4704 /* #define DBX_REGPARM_STABS_CODE */
4706 /* The letter to use in DBX symbol data to identify a symbol as a parameter
4707 passed in registers. DBX format does not customarily provide any way to do
4708 this. The default is `'P''. */
4709 /* #define DBX_REGPARM_STABS_LETTER */
4711 /* The letter to use in DBX symbol data to identify a symbol as a stack
4712 parameter. The default is `'p''. */
4713 /* #define DBX_MEMPARM_STABS_LETTER */
4715 /* Define this macro if the DBX information for a function and its arguments
4716 should precede the assembler code for the function. Normally, in DBX
4717 format, the debugging information entirely follows the assembler code.
4719 Defined in svr4.h. */
4720 /* #define DBX_FUNCTION_FIRST */
4722 /* Define this macro if the `N_LBRAC' symbol for a block should precede the
4723 debugging information for variables and functions defined in that block.
4724 Normally, in DBX format, the `N_LBRAC' symbol comes first. */
4725 /* #define DBX_LBRAC_FIRST */
4727 /* Define this macro if the value of a symbol describing the scope of a block
4728 (`N_LBRAC' or `N_RBRAC') should be relative to the start of the enclosing
4729 function. Normally, GNU C uses an absolute address.
4731 Defined in svr4.h. */
4732 /* #define DBX_BLOCKS_FUNCTION_RELATIVE */
4734 /* Define this macro if GNU C should generate `N_BINCL' and `N_EINCL'
4735 stabs for included header files, as on Sun systems. This macro
4736 also directs GNU C to output a type number as a pair of a file
4737 number and a type number within the file. Normally, GNU C does not
4738 generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single
4739 number for a type number. */
4740 /* #define DBX_USE_BINCL */
4743 /* Open ended Hooks for DBX Output. */
4745 /* Define this macro to say how to output to STREAM the debugging information
4746 for the start of a scope level for variable names. The argument NAME is the
4747 name of an assembler symbol (for use with `assemble_name') whose value is
4748 the address where the scope begins. */
4749 /* #define DBX_OUTPUT_LBRAC(STREAM, NAME) */
4751 /* Like `DBX_OUTPUT_LBRAC', but for the end of a scope level. */
4752 /* #define DBX_OUTPUT_RBRAC(STREAM, NAME) */
4754 /* Define this macro if the target machine requires special handling to output
4755 an enumeration type. The definition should be a C statement (sans
4756 semicolon) to output the appropriate information to STREAM for the type
4758 /* #define DBX_OUTPUT_ENUM(STREAM, TYPE) */
4760 /* Define this macro if the target machine requires special output at the end
4761 of the debugging information for a function. The definition should be a C
4762 statement (sans semicolon) to output the appropriate information to STREAM.
4763 FUNCTION is the `FUNCTION_DECL' node for the function. */
4764 /* #define DBX_OUTPUT_FUNCTION_END(STREAM, FUNCTION) */
4766 /* Define this macro if you need to control the order of output of the standard
4767 data types at the beginning of compilation. The argument SYMS is a `tree'
4768 which is a chain of all the predefined global symbols, including names of
4771 Normally, DBX output starts with definitions of the types for integers and
4772 characters, followed by all the other predefined types of the particular
4773 language in no particular order.
4775 On some machines, it is necessary to output different particular types
4776 first. To do this, define `DBX_OUTPUT_STANDARD_TYPES' to output those
4777 symbols in the necessary order. Any predefined types that you don't
4778 explicitly output will be output afterward in no particular order.
4780 Be careful not to define this macro so that it works only for C. There are
4781 no global variables to access most of the built-in types, because another
4782 language may have another set of types. The way to output a particular type
4783 is to look through SYMS to see if you can find it. Here is an example:
4787 for (decl = syms; decl; decl = TREE_CHAIN (decl))
4788 if (!strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)),
4790 dbxout_symbol (decl);
4794 This does nothing if the expected type does not exist.
4796 See the function `init_decl_processing' in `c-decl.c' to find the names to
4797 use for all the built-in C types. */
4798 /* #define DBX_OUTPUT_STANDARD_TYPES(SYMS) */
4800 /* Some stabs encapsulation formats (in particular ECOFF), cannot
4801 handle the `.stabs "",N_FUN,,0,0,Lscope-function-1' gdb dbx
4802 extention construct. On those machines, define this macro to turn
4803 this feature off without disturbing the rest of the gdb extensions. */
4804 /* #define NO_DBX_FUNCTION_END */
4807 /* File names in DBX format. */
4809 /* Define this if DBX wants to have the current directory recorded in each
4812 Note that the working directory is always recorded if GDB extensions are
4814 /* #define DBX_WORKING_DIRECTORY */
4816 /* A C statement to output DBX debugging information to the stdio stream STREAM
4817 which indicates that file NAME is the main source file--the file specified
4818 as the input file for compilation. This macro is called only once, at the
4819 beginning of compilation.
4821 This macro need not be defined if the standard form of output for DBX
4822 debugging information is appropriate.
4824 Defined in svr4.h. */
4825 /* #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME) */
4827 /* A C statement to output DBX debugging information to the stdio stream STREAM
4828 which indicates that the current directory during compilation is named NAME.
4830 This macro need not be defined if the standard form of output for DBX
4831 debugging information is appropriate. */
4832 /* #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(STREAM, NAME) */
4834 /* A C statement to output DBX debugging information at the end of compilation
4835 of the main source file NAME.
4837 If you don't define this macro, nothing special is output at the end of
4838 compilation, which is correct for most machines. */
4839 /* #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(STREAM, NAME) */
4841 /* A C statement to output DBX debugging information to the stdio stream STREAM
4842 which indicates that file NAME is the current source file. This output is
4843 generated each time input shifts to a different source file as a result of
4844 `#include', the end of an included file, or a `#line' command.
4846 This macro need not be defined if the standard form of output for DBX
4847 debugging information is appropriate. */
4848 /* #define DBX_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
4851 /* Macros for SDB and Dwarf Output. */
4853 /* Define this macro if GNU CC should produce COFF-style debugging output for
4854 SDB in response to the `-g' option. */
4855 /* #define SDB_DEBUGGING_INFO */
4857 /* Define this macro if GNU CC should produce dwarf format debugging output in
4858 response to the `-g' option.
4860 Defined in svr4.h. */
4861 /* #define DWARF_DEBUGGING_INFO */
4863 /* Define this macro if GNU CC should produce dwarf version 2 format debugging
4864 output in response to the `-g' option.
4866 To support optional call frame debugging information, you must also define
4867 `INCOMING_RETURN_ADDR_RTX' and either set `RTX_FRAME_RELATED_P' on the
4868 prologue insns if you use RTL for the prologue, or call `dwarf2out_def_cfa'
4869 and `dwarf2out_reg_save' as appropriate from `FUNCTION_PROLOGUE' if you
4872 Defined in svr4.h. */
4873 /* #define DWARF2_DEBUGGING_INFO */
4875 /* Define this macro if GNU CC should produce dwarf version 2-style
4876 line numbers. This usually requires extending the assembler to
4877 support them, and #defining DWARF2_LINE_MIN_INSN_LENGTH in the
4878 assembler configuration header files. */
4879 /* #define DWARF2_ASM_LINE_DEBUG_INFO 1 */
4881 /* Define this macro if addresses in Dwarf 2 debugging info should not
4882 be the same size as pointers on the target architecture. The
4883 macro's value should be the size, in bytes, to use for addresses in
4886 Some architectures use word addresses to refer to code locations,
4887 but Dwarf 2 info always uses byte addresses. On such machines,
4888 Dwarf 2 addresses need to be larger than the architecture's
4890 #define DWARF2_ADDR_SIZE 4
4892 /* Define these macros to override the assembler syntax for the special SDB
4893 assembler directives. See `sdbout.c' for a list of these macros and their
4894 arguments. If the standard syntax is used, you need not define them
4896 /* #define PUT_SDB_... */
4898 /* Some assemblers do not support a semicolon as a delimiter, even between SDB
4899 assembler directives. In that case, define this macro to be the delimiter
4900 to use (usually `\n'). It is not necessary to define a new set of
4901 `PUT_SDB_OP' macros if this is the only change required. */
4902 /* #define SDB_DELIM */
4904 /* Define this macro to override the usual method of constructing a dummy name
4905 for anonymous structure and union types. See `sdbout.c' for more
4907 /* #define SDB_GENERATE_FAKE */
4909 /* Define this macro to allow references to unknown structure, union, or
4910 enumeration tags to be emitted. Standard COFF does not allow handling of
4911 unknown references, MIPS ECOFF has support for it. */
4912 /* #define SDB_ALLOW_UNKNOWN_REFERENCES */
4914 /* Define this macro to allow references to structure, union, or enumeration
4915 tags that have not yet been seen to be handled. Some assemblers choke if
4916 forward tags are used, while some require it. */
4917 /* #define SDB_ALLOW_FORWARD_REFERENCES */
4920 /* Miscellaneous Parameters. */
4922 /* Define REAL_ARITHMETIC to use a software emulator for the target floating
4923 point mode. Otherwise the host floating point mode is used. */
4924 #define REAL_ARITHMETIC
4926 /* Define this if you have defined special-purpose predicates in the file
4927 `MACHINE.c'. This macro is called within an initializer of an array of
4928 structures. The first field in the structure is the name of a predicate and
4929 the second field is an array of rtl codes. For each predicate, list all rtl
4930 codes that can be in expressions matched by the predicate. The list should
4931 have a trailing comma. Here is an example of two entries in the list for a
4932 typical RISC machine:
4934 #define PREDICATE_CODES \
4935 {"gen_reg_rtx_operand", {SUBREG, REG}}, \
4936 {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}},
4938 Defining this macro does not affect the generated code (however, incorrect
4939 definitions that omit an rtl code that may be matched by the predicate can
4940 cause the compiler to malfunction). Instead, it allows the table built by
4941 `genrecog' to be more compact and efficient, thus speeding up the compiler.
4942 The most important predicates to include in the list specified by this macro
4943 are thoses used in the most insn patterns. */
4944 #define PREDICATE_CODES \
4945 {"shift_operator", {ASHIFT, ASHIFTRT, LSHIFTRT }}, \
4946 {"equality_operator", {EQ, NE }}, \
4947 {"inequality_operator", {GE, GT, LE, LT, GEU, GTU, LEU, LTU }}, \
4948 {"stormy16_ineqsi_operator", {LT, GE, LTU, GEU }},
4950 /* An alias for a machine mode name. This is the machine mode that elements of
4951 a jump-table should have. */
4952 #define CASE_VECTOR_MODE SImode
4954 /* Define as C expression which evaluates to nonzero if the tablejump
4955 instruction expects the table to contain offsets from the address of the
4957 Do not define this if the table should contain absolute addresses. */
4958 /* #define CASE_VECTOR_PC_RELATIVE 1 */
4960 /* Define this if control falls through a `case' insn when the index value is
4961 out of range. This means the specified default-label is actually ignored by
4962 the `case' insn proper. */
4963 /* #define CASE_DROPS_THROUGH */
4965 /* Define this to be the smallest number of different values for which it is
4966 best to use a jump-table instead of a tree of conditional branches. The
4967 default is four for machines with a `casesi' instruction and five otherwise.
4968 This is best for most machines. */
4969 /* #define CASE_VALUES_THRESHOLD */
4971 /* Define this macro if operations between registers with integral mode smaller
4972 than a word are always performed on the entire register. Most RISC machines
4973 have this property and most CISC machines do not. */
4974 #define WORD_REGISTER_OPERATIONS
4976 /* Define this macro to be a C expression indicating when insns that read
4977 memory in MODE, an integral mode narrower than a word, set the bits outside
4978 of MODE to be either the sign-extension or the zero-extension of the data
4979 read. Return `SIGN_EXTEND' for values of MODE for which the insn
4980 sign-extends, `ZERO_EXTEND' for which it zero-extends, and `NIL' for other
4983 This macro is not called with MODE non-integral or with a width greater than
4984 or equal to `BITS_PER_WORD', so you may return any value in this case. Do
4985 not define this macro if it would always return `NIL'. On machines where
4986 this macro is defined, you will normally define it as the constant
4987 `SIGN_EXTEND' or `ZERO_EXTEND'. */
4988 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
4990 /* Define if loading short immediate values into registers sign extends. */
4991 /* #define SHORT_IMMEDIATES_SIGN_EXTEND */
4993 /* An alias for a tree code that should be used by default for conversion of
4994 floating point values to fixed point. Normally, `FIX_ROUND_EXPR' is used. */
4995 /* #define IMPLICIT_FIX_EXPR */
4997 /* Define this macro if the same instructions that convert a floating point
4998 number to a signed fixed point number also convert validly to an unsigned
5000 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
5002 /* An alias for a tree code that is the easiest kind of division to compile
5003 code for in the general case. It may be `TRUNC_DIV_EXPR', `FLOOR_DIV_EXPR',
5004 `CEIL_DIV_EXPR' or `ROUND_DIV_EXPR'. These four division operators differ
5005 in how they round the result to an integer. `EASY_DIV_EXPR' is used when it
5006 is permissible to use any of those kinds of division and the choice should
5007 be made on the basis of efficiency. */
5008 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
5010 /* The maximum number of bytes that a single instruction can move quickly from
5011 memory to memory. */
5014 /* The maximum number of bytes that a single instruction can move quickly from
5015 memory to memory. If this is undefined, the default is `MOVE_MAX'.
5016 Otherwise, it is the constant value that is the largest value that
5017 `MOVE_MAX' can have at run-time. */
5018 /* #define MAX_MOVE_MAX */
5020 /* A C expression that is nonzero if on this machine the number of bits
5021 actually used for the count of a shift operation is equal to the number of
5022 bits needed to represent the size of the object being shifted. When this
5023 macro is non-zero, the compiler will assume that it is safe to omit a
5024 sign-extend, zero-extend, and certain bitwise `and' instructions that
5025 truncates the count of a shift operation. On machines that have
5026 instructions that act on bitfields at variable positions, which may include
5027 `bit test' instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables
5028 deletion of truncations of the values that serve as arguments to bitfield
5031 If both types of instructions truncate the count (for shifts) and position
5032 (for bitfield operations), or if no variable-position bitfield instructions
5033 exist, you should define this macro.
5035 However, on some machines, such as the 80386 and the 680x0, truncation only
5036 applies to shift operations and not the (real or pretended) bitfield
5037 operations. Define `SHIFT_COUNT_TRUNCATED' to be zero on such machines.
5038 Instead, add patterns to the `md' file that include the implied truncation
5039 of the shift instructions.
5041 You need not define this macro if it would always have the value of zero. */
5042 #define SHIFT_COUNT_TRUNCATED 1
5044 /* A C expression which is nonzero if on this machine it is safe to "convert"
5045 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
5046 than INPREC) by merely operating on it as if it had only OUTPREC bits.
5048 On many machines, this expression can be 1.
5050 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
5051 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the
5052 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
5054 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
5056 /* A C expression describing the value returned by a comparison operator with
5057 an integral mode and stored by a store-flag instruction (`sCOND') when the
5058 condition is true. This description must apply to *all* the `sCOND'
5059 patterns and all the comparison operators whose results have a `MODE_INT'
5062 A value of 1 or -1 means that the instruction implementing the comparison
5063 operator returns exactly 1 or -1 when the comparison is true and 0 when the
5064 comparison is false. Otherwise, the value indicates which bits of the
5065 result are guaranteed to be 1 when the comparison is true. This value is
5066 interpreted in the mode of the comparison operation, which is given by the
5067 mode of the first operand in the `sCOND' pattern. Either the low bit or the
5068 sign bit of `STORE_FLAG_VALUE' be on. Presently, only those bits are used
5071 If `STORE_FLAG_VALUE' is neither 1 or -1, the compiler will generate code
5072 that depends only on the specified bits. It can also replace comparison
5073 operators with equivalent operations if they cause the required bits to be
5074 set, even if the remaining bits are undefined. For example, on a machine
5075 whose comparison operators return an `SImode' value and where
5076 `STORE_FLAG_VALUE' is defined as `0x80000000', saying that just the sign bit
5077 is relevant, the expression
5079 (ne:SI (and:SI X (const_int POWER-OF-2)) (const_int 0))
5083 (ashift:SI X (const_int N))
5085 where N is the appropriate shift count to move the bit being tested into the
5088 There is no way to describe a machine that always sets the low-order bit for
5089 a true value, but does not guarantee the value of any other bits, but we do
5090 not know of any machine that has such an instruction. If you are trying to
5091 port GNU CC to such a machine, include an instruction to perform a
5092 logical-and of the result with 1 in the pattern for the comparison operators
5095 Often, a machine will have multiple instructions that obtain a value from a
5096 comparison (or the condition codes). Here are rules to guide the choice of
5097 value for `STORE_FLAG_VALUE', and hence the instructions to be used:
5099 * Use the shortest sequence that yields a valid definition for
5100 `STORE_FLAG_VALUE'. It is more efficient for the compiler to
5101 "normalize" the value (convert it to, e.g., 1 or 0) than for
5102 the comparison operators to do so because there may be
5103 opportunities to combine the normalization with other
5106 * For equal-length sequences, use a value of 1 or -1, with -1
5107 being slightly preferred on machines with expensive jumps and
5108 1 preferred on other machines.
5110 * As a second choice, choose a value of `0x80000001' if
5111 instructions exist that set both the sign and low-order bits
5112 but do not define the others.
5114 * Otherwise, use a value of `0x80000000'.
5116 Many machines can produce both the value chosen for `STORE_FLAG_VALUE' and
5117 its negation in the same number of instructions. On those machines, you
5118 should also define a pattern for those cases, e.g., one matching
5120 (set A (neg:M (ne:M B C)))
5122 Some machines can also perform `and' or `plus' operations on condition code
5123 values with less instructions than the corresponding `sCOND' insn followed
5124 by `and' or `plus'. On those machines, define the appropriate patterns.
5125 Use the names `incscc' and `decscc', respectively, for the the patterns
5126 which perform `plus' or `minus' operations on condition code values. See
5127 `rs6000.md' for some examples. The GNU Superoptizer can be used to find
5128 such instruction sequences on other machines.
5130 You need not define `STORE_FLAG_VALUE' if the machine has no store-flag
5132 /* #define STORE_FLAG_VALUE */
5134 /* A C expression that gives a non-zero floating point value that is returned
5135 when comparison operators with floating-point results are true. Define this
5136 macro on machine that have comparison operations that return floating-point
5137 values. If there are no such operations, do not define this macro. */
5138 /* #define FLOAT_STORE_FLAG_VALUE */
5140 /* An alias for the machine mode for pointers. On most machines, define this
5141 to be the integer mode corresponding to the width of a hardware pointer;
5142 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
5143 you must define this to be one of the partial integer modes, such as
5146 The width of `Pmode' must be at least as large as the value of
5147 `POINTER_SIZE'. If it is not equal, you must define the macro
5148 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
5149 #define Pmode HImode
5151 /* An alias for the machine mode used for memory references to functions being
5152 called, in `call' RTL expressions. On most machines this should be
5154 #define FUNCTION_MODE HImode
5156 /* A C expression for the maximum number of instructions above which the
5157 function DECL should not be inlined. DECL is a `FUNCTION_DECL' node.
5159 The default definition of this macro is 64 plus 8 times the number of
5160 arguments that the function accepts. Some people think a larger threshold
5161 should be used on RISC machines. */
5162 /* #define INTEGRATE_THRESHOLD(DECL) */
5164 /* Define this if the preprocessor should ignore `#sccs' directives and print
5167 Defined in svr4.h. */
5168 /* #define SCCS_DIRECTIVE */
5170 /* Define this macro if the system header files support C++ as well as C. This
5171 macro inhibits the usual method of using system header files in C++, which
5172 is to pretend that the file's contents are enclosed in `extern "C" {...}'. */
5173 #define NO_IMPLICIT_EXTERN_C
5175 /* Define this macro if you want to implement any pragmas. If defined, it
5176 should be a C expression to be executed when #pragma is seen. The
5177 argument GETC is a function which will return the next character in the
5178 input stream, or EOF if no characters are left. The argument UNGETC is
5179 a function which will push a character back into the input stream. The
5180 argument NAME is the word following #pragma in the input stream. The input
5181 stream pointer will be pointing just beyond the end of this word. The
5182 expression should return true if it handled the pragma, false otherwise.
5183 The input stream should be left undistrubed if false is returned, otherwise
5184 it should be pointing at the next character after the end of the pragma.
5185 Any characters left between the end of the pragma and the end of the line will
5188 It is generally a bad idea to implement new uses of `#pragma'. The only
5189 reason to define this macro is for compatibility with other compilers that
5190 do support `#pragma' for the sake of any user programs which already use it. */
5191 /* #define HANDLE_PRAGMA(GETC, UNGETC, NAME) handle_pragma (GETC, UNGETC, NAME) */
5193 /* Define this macro to handle System V style pragmas: #pragma pack and
5194 #pragma weak. Note, #pragma weak will only be supported if SUPPORT_WEAK is
5197 Defined in svr4.h. */
5198 #define HANDLE_SYSV_PRAGMA
5200 /* Define this macro if you want to support the Win32 style pragmas
5201 #pragma pack(push,<n>) and #pragma pack(pop). */
5202 /* HANDLE_PRAGMA_PACK_PUSH_POP 1 */
5204 /* If defined, a C expression whose value is nonzero if IDENTIFIER with
5205 arguments ARGS is a valid machine specific attribute for DECL. The
5206 attributes in ATTRIBUTES have previously been assigned to DECL. */
5207 /* #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) */
5209 /* If defined, a C expression whose value is nonzero if IDENTIFIER with
5210 arguments ARGS is a valid machine specific attribute for TYPE. The
5211 attributes in ATTRIBUTES have previously been assigned to TYPE. */
5212 /* #define VALID_MACHINE_TYPE_ATTRIBUTE(TYPE, ATTRIBUTES, IDENTIFIER, ARGS) */
5214 /* If defined, a C expression whose value is zero if the attributes on TYPE1
5215 and TYPE2 are incompatible, one if they are compatible, and two if they are
5216 nearly compatible (which causes a warning to be generated). */
5217 /* #define COMP_TYPE_ATTRIBUTES(TYPE1, TYPE2) */
5219 /* If defined, a C statement that assigns default attributes to newly defined
5221 /* #define SET_DEFAULT_TYPE_ATTRIBUTES(TYPE) */
5223 /* Define this macro to control use of the character `$' in identifier names.
5224 The value should be 0, 1, or 2. 0 means `$' is not allowed by default; 1
5225 means it is allowed by default if `-traditional' is used; 2 means it is
5226 allowed by default provided `-ansi' is not used. 1 is the default; there is
5227 no need to define this macro in that case. */
5228 /* #define DOLLARS_IN_IDENTIFIERS */
5230 /* Define this macro if the assembler does not accept the character `$' in
5231 label names. By default constructors and destructors in G++ have `$' in the
5232 identifiers. If this macro is defined, `.' is used instead.
5234 Defined in svr4.h. */
5235 /* #define NO_DOLLAR_IN_LABEL */
5237 /* Define this macro if the assembler does not accept the character `.' in
5238 label names. By default constructors and destructors in G++ have names that
5239 use `.'. If this macro is defined, these names are rewritten to avoid `.'. */
5240 /* #define NO_DOT_IN_LABEL */
5242 /* Define this macro if the target system expects every program's `main'
5243 function to return a standard "success" value by default (if no other value
5244 is explicitly returned).
5246 The definition should be a C statement (sans semicolon) to generate the
5247 appropriate rtl instructions. It is used only when compiling the end of
5249 /* #define DEFAULT_MAIN_RETURN */
5251 /* Define this if the target system supports the function `atexit' from the
5252 ANSI C standard. If this is not defined, and `INIT_SECTION_ASM_OP' is not
5253 defined, a default `exit' function will be provided to support C++.
5255 Defined by svr4.h */
5256 /* #define HAVE_ATEXIT */
5258 /* Define this if your `exit' function needs to do something besides calling an
5259 external function `_cleanup' before terminating with `_exit'. The
5260 `EXIT_BODY' macro is only needed if netiher `HAVE_ATEXIT' nor
5261 `INIT_SECTION_ASM_OP' are defined. */
5262 /* #define EXIT_BODY */
5264 /* Define this macro as a C expression that is nonzero if it is safe for the
5265 delay slot scheduler to place instructions in the delay slot of INSN, even
5266 if they appear to use a resource set or clobbered in INSN. INSN is always a
5267 `jump_insn' or an `insn'; GNU CC knows that every `call_insn' has this
5268 behavior. On machines where some `insn' or `jump_insn' is really a function
5269 call and hence has this behavior, you should define this macro.
5271 You need not define this macro if it would always return zero. */
5272 /* #define INSN_SETS_ARE_DELAYED(INSN) */
5274 /* Define this macro as a C expression that is nonzero if it is safe for the
5275 delay slot scheduler to place instructions in the delay slot of INSN, even
5276 if they appear to set or clobber a resource referenced in INSN. INSN is
5277 always a `jump_insn' or an `insn'. On machines where some `insn' or
5278 `jump_insn' is really a function call and its operands are registers whose
5279 use is actually in the subroutine it calls, you should define this macro.
5280 Doing so allows the delay slot scheduler to move instructions which copy
5281 arguments into the argument registers into the delay slot of INSN.
5283 You need not define this macro if it would always return zero. */
5284 /* #define INSN_REFERENCES_ARE_DELAYED(INSN) */
5286 /* In rare cases, correct code generation requires extra machine dependent
5287 processing between the second jump optimization pass and delayed branch
5288 scheduling. On those machines, define this macro as a C statement to act on
5289 the code starting at INSN. */
5290 /* #define MACHINE_DEPENDENT_REORG(INSN) */
5292 /* Define this macro if in some cases global symbols from one translation unit
5293 may not be bound to undefined symbols in another translation unit without
5294 user intervention. For instance, under Microsoft Windows symbols must be
5295 explicitly imported from shared libraries (DLLs). */
5296 /* #define MULTIPLE_SYMBOL_SPACES */
5298 /* A C expression for the maximum number of instructions to execute via
5299 conditional execution instructions instead of a branch. A value of
5300 BRANCH_COST+1 is the default if the machine does not use
5301 cc0, and 1 if it does use cc0. */
5302 /* #define MAX_CONDITIONAL_EXECUTE */
5304 /* A C statement that adds to tree CLOBBERS a set of STRING_CST trees for any
5305 hard regs the port wishes to automatically clobber for all asms. */
5306 /* #define MD_ASM_CLOBBERS(CLOBBERS) */
5308 /* Indicate how many instructions can be issued at the same time. */
5309 /* #define ISSUE_RATE */
5311 /* A C statement which is executed by the Haifa scheduler at the beginning of
5312 each block of instructions that are to be scheduled. FILE is either a null
5313 pointer, or a stdio stream to write any debug output to. VERBOSE is the
5314 verbose level provided by -fsched-verbose-<n>. */
5315 /* #define MD_SCHED_INIT (FILE, VERBOSE) */
5317 /* A C statement which is executed by the Haifa scheduler after it has scheduled
5318 the ready list to allow the machine description to reorder it (for example to
5319 combine two small instructions together on VLIW machines). FILE is either a
5320 null pointer, or a stdio stream to write any debug output to. VERBOSE is the
5321 verbose level provided by -fsched-verbose-=<n>. READY is a pointer to the
5322 ready list of instructions that are ready to be scheduled. N_READY is the
5323 number of elements in the ready list. The scheduler reads the ready list in
5324 reverse order, starting with READY[N_READY-1] and going to READY[0]. CLOCK
5325 is the timer tick of the scheduler. CAN_ISSUE_MORE is an output parameter that
5326 is set to the number of insns that can issue this clock; normally this is just
5328 /* #define MD_SCHED_REORDER (FILE, VERBOSE, READY, N_READY, CLOCK, CAN_ISSUE_MORE) */
5330 /* A C statement which is executed by the Haifa scheduler after it has scheduled
5331 an insn from the ready list. FILE is either a null pointer, or a stdio stream
5332 to write any debug output to. VERBOSE is the verbose level provided by
5333 -fsched-verbose-<n>. INSN is the instruction that was scheduled. MORE is the
5334 number of instructions that can be issued in the current cycle. This macro
5335 is responsible for updating the value of MORE (typically by (MORE)--). */
5336 /* #define MD_SCHED_VARIABLE_ISSUE (FILE, VERBOSE, INSN, MORE) */
5338 /* Define this to the largest integer machine mode which can be used for
5339 operations other than load, store and copy operations. You need only define
5340 this macro if the target holds values larger than word_mode in general purpose
5341 registers. Most targets should not define this macro. */
5342 /* #define MAX_INTEGER_COMPUTATION_MODE */
5344 /* Define this macro as a C string constant for the linker argument to link in the
5345 system math library, or "" if the target does not have a separate math library.
5346 You need only define this macro if the default of "-lm" is wrong. */
5347 /* #define MATH_LIBRARY */
5349 /* Define the information needed to generate branch and scc insns. This is
5350 stored from the compare operation. Note that we can't use "rtx" here
5351 since it hasn't been defined! */
5353 extern struct rtx_def
*stormy16_compare_op0
, *stormy16_compare_op1
;
5355 /* End of generic.h */