1 /* Definitions of target machine for GNU compiler, for IBM RS/6000.
2 Copyright (C) 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
3 Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 /* Note that some other tm.h files include this one and then override
24 many of the definitions that relate to assembler syntax. */
27 /* Names to predefine in the preprocessor for this target machine. */
29 #define CPP_PREDEFINES "-D_IBMR2 -D_POWER -D_AIX -D_AIX32 \
30 -Asystem(unix) -Asystem(aix) -Acpu(rs6000) -Amachine(rs6000)"
32 /* Print subsidiary information on the compiler version in use. */
33 #define TARGET_VERSION ;
35 /* Default string to use for cpu if not specified. */
36 #ifndef TARGET_CPU_DEFAULT
37 #define TARGET_CPU_DEFAULT ((char *)0)
40 /* Tell the assembler to assume that all undefined names are external.
42 Don't do this until the fixed IBM assembler is more generally available.
43 When this becomes permanently defined, the ASM_OUTPUT_EXTERNAL,
44 ASM_OUTPUT_EXTERNAL_LIBCALL, and RS6000_OUTPUT_BASENAME macros will no
45 longer be needed. Also, the extern declaration of mcount in ASM_FILE_START
46 will no longer be needed. */
48 /* #define ASM_SPEC "-u %(asm_cpu)" */
50 /* Define appropriate architecture macros for preprocessor depending on
53 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE} %(cpp_cpu)"
55 /* Common CPP definitions used by CPP_SPEC amonst the various targets
56 for handling -mcpu=xxx switches. */
57 #define CPP_CPU_SPEC \
59 %{mpower: %{!mpower2: -D_ARCH_PWR}} \
60 %{mpower2: -D_ARCH_PWR2} \
61 %{mpowerpc*: -D_ARCH_PPC} \
62 %{mno-power: %{!mpowerpc*: -D_ARCH_COM}} \
63 %{!mno-power: %{!mpower2: %(cpp_default)}}} \
64 %{mcpu=common: -D_ARCH_COM} \
65 %{mcpu=power: -D_ARCH_PWR} \
66 %{mcpu=power2: -D_ARCH_PWR2} \
67 %{mcpu=powerpc: -D_ARCH_PPC} \
68 %{mcpu=rios: -D_ARCH_PWR} \
69 %{mcpu=rios1: -D_ARCH_PWR} \
70 %{mcpu=rios2: -D_ARCH_PWR2} \
71 %{mcpu=rsc: -D_ARCH_PWR} \
72 %{mcpu=rsc1: -D_ARCH_PWR} \
73 %{mcpu=403: -D_ARCH_PPC} \
74 %{mcpu=505: -D_ARCH_PPC} \
75 %{mcpu=601: -D_ARCH_PPC -D_ARCH_PWR} \
76 %{mcpu=602: -D_ARCH_PPC} \
77 %{mcpu=603: -D_ARCH_PPC} \
78 %{mcpu=603e: -D_ARCH_PPC} \
79 %{mcpu=604: -D_ARCH_PPC} \
80 %{mcpu=620: -D_ARCH_PPC} \
81 %{mcpu=821: -D_ARCH_PPC} \
82 %{mcpu=860: -D_ARCH_PPC}"
84 #ifndef CPP_DEFAULT_SPEC
85 #define CPP_DEFAULT_SPEC "-D_ARCH_PWR"
89 #define CPP_SYSV_SPEC ""
92 #ifndef CPP_ENDIAN_SPEC
93 #define CPP_ENDIAN_SPEC ""
96 #ifndef CPP_SYSV_DEFAULT_SPEC
97 #define CPP_SYSV_DEFAULT_SPEC ""
100 /* Common ASM definitions used by ASM_SPEC amonst the various targets
101 for handling -mcpu=xxx switches. */
102 #define ASM_CPU_SPEC \
104 %{mpower: %{!mpower2: -mpwr}} \
106 %{mpowerpc*: -mppc} \
107 %{mno-power: %{!mpowerpc*: -mcom}} \
108 %{!mno-power: %{!mpower2: %(asm_default)}}} \
109 %{mcpu=common: -mcom} \
110 %{mcpu=power: -mpwr} \
111 %{mcpu=power2: -mpwrx} \
112 %{mcpu=powerpc: -mppc} \
113 %{mcpu=rios: -mpwr} \
114 %{mcpu=rios1: -mpwr} \
115 %{mcpu=rios2: -mpwrx} \
117 %{mcpu=rsc1: -mpwr} \
123 %{mcpu=603e: -mppc} \
129 #ifndef ASM_DEFAULT_SPEC
130 #define ASM_DEFAULT_SPEC "-mpwr"
133 /* This macro defines names of additional specifications to put in the specs
134 that can be used in various specifications like CC1_SPEC. Its definition
135 is an initializer with a subgrouping for each command option.
137 Each subgrouping contains a string constant, that defines the
138 specification name, and a string constant that used by the GNU CC driver
141 Do not define this macro if it does not need to do anything. */
143 #ifndef SUBTARGET_EXTRA_SPECS
144 #define SUBTARGET_EXTRA_SPECS
147 #define EXTRA_SPECS \
148 { "cpp_cpu", CPP_CPU_SPEC }, \
149 { "cpp_default", CPP_DEFAULT_SPEC }, \
150 { "cpp_sysv", CPP_SYSV_SPEC }, \
151 { "cpp_sysv_default", CPP_SYSV_DEFAULT_SPEC }, \
152 { "cpp_endian", CPP_ENDIAN_SPEC }, \
153 { "asm_cpu", ASM_CPU_SPEC }, \
154 { "asm_default", ASM_DEFAULT_SPEC }, \
155 { "link_syscalls", LINK_SYSCALLS_SPEC }, \
156 { "link_libg", LINK_LIBG_SPEC }, \
157 { "link_path", LINK_PATH_SPEC }, \
158 { "link_start", LINK_START_SPEC }, \
159 SUBTARGET_EXTRA_SPECS
161 /* Default paths to give linker under V.4 */
162 #ifndef LINK_PATH_SPEC
163 #define LINK_PATH_SPEC ""
166 /* Default location of syscalls.exp under AIX */
167 #ifndef CROSS_COMPILE
168 #define LINK_SYSCALLS_SPEC "-bI:/lib/syscalls.exp"
170 #define LINK_SYSCALLS_SPEC ""
173 /* Default location of libg.exp under AIX */
174 #ifndef CROSS_COMPILE
175 #define LINK_LIBG_SPEC "-bexport:/usr/lib/libg.exp"
177 #define LINK_LIBG_SPEC ""
180 /* Default starting address if specified */
181 #ifndef LINK_START_SPEC
182 #define LINK_START_SPEC ""
185 /* Define the options for the binder: Start text at 512, align all segments
186 to 512 bytes, and warn if there is text relocation.
188 The -bhalt:4 option supposedly changes the level at which ld will abort,
189 but it also suppresses warnings about multiply defined symbols and is
190 used by the AIX cc command. So we use it here.
192 -bnodelcsect undoes a poor choice of default relating to multiply-defined
193 csects. See AIX documentation for more information about this.
195 -bM:SRE tells the linker that the output file is Shared REusable. Note
196 that to actually build a shared library you will also need to specify an
197 export list with the -Wl,-bE option. */
199 #define LINK_SPEC "-T512 -H512 %{!r:-btextro} -bhalt:4 -bnodelcsect\
200 %{static:-bnso %(link_syscalls) } \
201 %{!shared:%{g*: %(link_libg) }} %{shared:-bM:SRE}"
203 /* Profiled library versions are used by linking with special directories. */
204 #define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
205 %{p:-L/lib/profiled -L/usr/lib/profiled} %{!shared:%{g*:-lg}} -lc"
207 /* gcc must do the search itself to find libgcc.a, not use -l. */
208 #define LIBGCC_SPEC "libgcc.a%s"
210 /* Don't turn -B into -L if the argument specifies a relative file name. */
211 #define RELATIVE_PREFIX_NOT_LINKDIR
213 /* Architecture type. */
215 extern int target_flags
;
217 /* Use POWER architecture instructions and MQ register. */
218 #define MASK_POWER 0x01
220 /* Use POWER2 extensions to POWER architecture. */
221 #define MASK_POWER2 0x02
223 /* Use PowerPC architecture instructions. */
224 #define MASK_POWERPC 0x04
226 /* Use PowerPC General Purpose group optional instructions, e.g. fsqrt. */
227 #define MASK_PPC_GPOPT 0x08
229 /* Use PowerPC Graphics group optional instructions, e.g. fsel. */
230 #define MASK_PPC_GFXOPT 0x10
232 /* Use PowerPC-64 architecture instructions. */
233 #define MASK_POWERPC64 0x20
235 /* Use revised mnemonic names defined for PowerPC architecture. */
236 #define MASK_NEW_MNEMONICS 0x40
238 /* Disable placing fp constants in the TOC; can be turned on when the
240 #define MASK_NO_FP_IN_TOC 0x80
242 /* Disable placing symbol+offset constants in the TOC; can be turned on when
243 the TOC overflows. */
244 #define MASK_NO_SUM_IN_TOC 0x100
246 /* Output only one TOC entry per module. Normally linking fails if
247 there are more than 16K unique variables/constants in an executable. With
248 this option, linking fails only if there are more than 16K modules, or
249 if there are more than 16K unique variables/constant in a single module.
251 This is at the cost of having 2 extra loads and one extra store per
252 function, and one less allocatable register. */
253 #define MASK_MINIMAL_TOC 0x200
255 /* Nonzero for the 64bit model: ints, longs, and pointers are 64 bits. */
256 #define MASK_64BIT 0x400
258 /* Disable use of FPRs. */
259 #define MASK_SOFT_FLOAT 0x800
261 /* Enable load/store multiple, even on powerpc */
262 #define MASK_MULTIPLE 0x1000
263 #define MASK_MULTIPLE_SET 0x2000
265 /* Use string instructions for block moves */
266 #define MASK_STRING 0x4000
267 #define MASK_STRING_SET 0x8000
269 /* Temporary debug switches */
270 #define MASK_DEBUG_STACK 0x10000
271 #define MASK_DEBUG_ARG 0x20000
273 #define TARGET_POWER (target_flags & MASK_POWER)
274 #define TARGET_POWER2 (target_flags & MASK_POWER2)
275 #define TARGET_POWERPC (target_flags & MASK_POWERPC)
276 #define TARGET_PPC_GPOPT (target_flags & MASK_PPC_GPOPT)
277 #define TARGET_PPC_GFXOPT (target_flags & MASK_PPC_GFXOPT)
278 #define TARGET_POWERPC64 (target_flags & MASK_POWERPC64)
279 #define TARGET_NEW_MNEMONICS (target_flags & MASK_NEW_MNEMONICS)
280 #define TARGET_NO_FP_IN_TOC (target_flags & MASK_NO_FP_IN_TOC)
281 #define TARGET_NO_SUM_IN_TOC (target_flags & MASK_NO_SUM_IN_TOC)
282 #define TARGET_MINIMAL_TOC (target_flags & MASK_MINIMAL_TOC)
283 #define TARGET_64BIT (target_flags & MASK_64BIT)
284 #define TARGET_SOFT_FLOAT (target_flags & MASK_SOFT_FLOAT)
285 #define TARGET_MULTIPLE (target_flags & MASK_MULTIPLE)
286 #define TARGET_MULTIPLE_SET (target_flags & MASK_MULTIPLE_SET)
287 #define TARGET_STRING (target_flags & MASK_STRING)
288 #define TARGET_STRING_SET (target_flags & MASK_STRING_SET)
289 #define TARGET_DEBUG_STACK (target_flags & MASK_DEBUG_STACK)
290 #define TARGET_DEBUG_ARG (target_flags & MASK_DEBUG_ARG)
292 #define TARGET_32BIT (! TARGET_64BIT)
293 #define TARGET_HARD_FLOAT (! TARGET_SOFT_FLOAT)
295 /* Pseudo target to indicate whether the object format is ELF
296 (to get around not having conditional compilation in the md file) */
301 /* If this isn't V.4, don't support -mno-toc. */
302 #ifndef TARGET_NO_TOC
303 #define TARGET_NO_TOC 0
307 /* Pseudo target to say whether this is Windows NT */
308 #ifndef TARGET_WINDOWS_NT
309 #define TARGET_WINDOWS_NT 0
312 /* Pseudo target to say whether this is MAC */
314 #define TARGET_MACOS 0
317 /* Pseudo target to say whether this is AIX */
319 #if (TARGET_ELF || TARGET_WINDOWS_NT || TARGET_MACOS)
326 /* Run-time compilation parameters selecting different hardware subsets.
328 Macro to define tables used to set the flags.
329 This is a list in braces of pairs in braces,
330 each pair being { "NAME", VALUE }
331 where VALUE is the bits to set or minus the bits to clear.
332 An empty string NAME is used to identify the default VALUE. */
334 /* This is meant to be redefined in the host dependent files */
335 #ifndef SUBTARGET_SWITCHES
336 #define SUBTARGET_SWITCHES
339 #define TARGET_SWITCHES \
340 {{"power", MASK_POWER | MASK_MULTIPLE | MASK_STRING}, \
341 {"power2", (MASK_POWER | MASK_MULTIPLE | MASK_STRING \
343 {"no-power2", - MASK_POWER2}, \
344 {"no-power", - (MASK_POWER | MASK_POWER2 | MASK_MULTIPLE \
346 {"powerpc", MASK_POWERPC}, \
347 {"no-powerpc", - (MASK_POWERPC | MASK_PPC_GPOPT \
348 | MASK_PPC_GFXOPT | MASK_POWERPC64)}, \
349 {"powerpc-gpopt", MASK_POWERPC | MASK_PPC_GPOPT}, \
350 {"no-powerpc-gpopt", - MASK_PPC_GPOPT}, \
351 {"powerpc-gfxopt", MASK_POWERPC | MASK_PPC_GFXOPT}, \
352 {"no-powerpc-gfxopt", - MASK_PPC_GFXOPT}, \
353 {"new-mnemonics", MASK_NEW_MNEMONICS}, \
354 {"old-mnemonics", -MASK_NEW_MNEMONICS}, \
355 {"full-toc", - (MASK_NO_FP_IN_TOC | MASK_NO_SUM_IN_TOC \
356 | MASK_MINIMAL_TOC)}, \
357 {"fp-in-toc", - MASK_NO_FP_IN_TOC}, \
358 {"no-fp-in-toc", MASK_NO_FP_IN_TOC}, \
359 {"sum-in-toc", - MASK_NO_SUM_IN_TOC}, \
360 {"no-sum-in-toc", MASK_NO_SUM_IN_TOC}, \
361 {"minimal-toc", MASK_MINIMAL_TOC}, \
362 {"minimal-toc", - (MASK_NO_FP_IN_TOC | MASK_NO_SUM_IN_TOC)}, \
363 {"no-minimal-toc", - MASK_MINIMAL_TOC}, \
364 {"hard-float", - MASK_SOFT_FLOAT}, \
365 {"soft-float", MASK_SOFT_FLOAT}, \
366 {"multiple", MASK_MULTIPLE | MASK_MULTIPLE_SET}, \
367 {"no-multiple", - MASK_MULTIPLE}, \
368 {"no-multiple", MASK_MULTIPLE_SET}, \
369 {"string", MASK_STRING | MASK_STRING_SET}, \
370 {"no-string", - MASK_STRING}, \
371 {"no-string", MASK_STRING_SET}, \
372 {"debug-stack", MASK_DEBUG_STACK}, \
373 {"debug-arg", MASK_DEBUG_ARG}, \
375 {"", TARGET_DEFAULT}}
377 #define TARGET_DEFAULT (MASK_POWER | MASK_MULTIPLE | MASK_STRING)
379 /* Processor type. */
390 extern enum processor_type rs6000_cpu
;
392 /* Recast the processor type to the cpu attribute. */
393 #define rs6000_cpu_attr ((enum attr_cpu)rs6000_cpu)
395 /* Define generic processor types based upon current deployment. */
396 #define PROCESSOR_COMMON PROCESSOR_PPC601
397 #define PROCESSOR_POWER PROCESSOR_RIOS1
398 #define PROCESSOR_POWERPC PROCESSOR_PPC604
400 /* Define the default processor. This is overridden by other tm.h files. */
401 #define PROCESSOR_DEFAULT PROCESSOR_RIOS1
403 /* Specify the dialect of assembler to use. New mnemonics is dialect one
404 and the old mnemonics are dialect zero. */
405 #define ASSEMBLER_DIALECT TARGET_NEW_MNEMONICS ? 1 : 0
407 /* This macro is similar to `TARGET_SWITCHES' but defines names of
408 command options that have values. Its definition is an
409 initializer with a subgrouping for each command option.
411 Each subgrouping contains a string constant, that defines the
412 fixed part of the option name, and the address of a variable.
413 The variable, type `char *', is set to the variable part of the
414 given option if the fixed part matches. The actual option name
415 is made by appending `-m' to the specified name.
417 Here is an example which defines `-mshort-data-NUMBER'. If the
418 given option is `-mshort-data-512', the variable `m88k_short_data'
419 will be set to the string `"512"'.
421 extern char *m88k_short_data;
422 #define TARGET_OPTIONS { { "short-data-", &m88k_short_data } } */
424 /* This is meant to be overriden in target specific files. */
425 #ifndef SUBTARGET_OPTIONS
426 #define SUBTARGET_OPTIONS
429 #define TARGET_OPTIONS \
431 {"cpu=", &rs6000_select[1].string}, \
432 {"tune=", &rs6000_select[2].string}, \
436 /* rs6000_select[0] is reserved for the default cpu defined via --with-cpu */
437 struct rs6000_cpu_select
445 extern struct rs6000_cpu_select rs6000_select
[];
447 /* Sometimes certain combinations of command options do not make sense
448 on a particular target machine. You can define a macro
449 `OVERRIDE_OPTIONS' to take account of this. This macro, if
450 defined, is executed once just after all the command options have
453 On the RS/6000 this is used to define the target cpu type. */
455 #define OVERRIDE_OPTIONS rs6000_override_options (TARGET_CPU_DEFAULT)
457 /* Show we can debug even without a frame pointer. */
458 #define CAN_DEBUG_WITHOUT_FP
460 /* target machine storage layout */
462 /* Define to support cross compilation to an RS6000 target. */
463 #define REAL_ARITHMETIC
465 /* Define this macro if it is advisable to hold scalars in registers
466 in a wider mode than that declared by the program. In such cases,
467 the value is constrained to be within the bounds of the declared
468 type, but kept valid in the wider mode. The signedness of the
469 extension may differ from that of the type. */
471 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
472 if (GET_MODE_CLASS (MODE) == MODE_INT \
473 && GET_MODE_SIZE (MODE) < 4) \
476 /* Define this if most significant bit is lowest numbered
477 in instructions that operate on numbered bit-fields. */
478 /* That is true on RS/6000. */
479 #define BITS_BIG_ENDIAN 1
481 /* Define this if most significant byte of a word is the lowest numbered. */
482 /* That is true on RS/6000. */
483 #define BYTES_BIG_ENDIAN 1
485 /* Define this if most significant word of a multiword number is lowest
488 For RS/6000 we can decide arbitrarily since there are no machine
489 instructions for them. Might as well be consistent with bits and bytes. */
490 #define WORDS_BIG_ENDIAN 1
492 /* number of bits in an addressable storage unit */
493 #define BITS_PER_UNIT 8
495 /* Width in bits of a "word", which is the contents of a machine register.
496 Note that this is not necessarily the width of data type `int';
497 if using 16-bit ints on a 68000, this would still be 32.
498 But on a machine with 16-bit registers, this would be 16. */
499 #define BITS_PER_WORD (! TARGET_POWERPC64 ? 32 : 64)
500 #define MAX_BITS_PER_WORD 64
502 /* Width of a word, in units (bytes). */
503 #define UNITS_PER_WORD (! TARGET_POWERPC64 ? 4 : 8)
504 #define MIN_UNITS_PER_WORD 4
505 #define UNITS_PER_FP_WORD 8
507 /* Type used for ptrdiff_t, as a string used in a declaration. */
508 #define PTRDIFF_TYPE "int"
510 /* Type used for wchar_t, as a string used in a declaration. */
511 #define WCHAR_TYPE "short unsigned int"
513 /* Width of wchar_t in bits. */
514 #define WCHAR_TYPE_SIZE 16
516 /* A C expression for the size in bits of the type `short' on the
517 target machine. If you don't define this, the default is half a
518 word. (If this would be less than one storage unit, it is
519 rounded up to one unit.) */
520 #define SHORT_TYPE_SIZE 16
522 /* A C expression for the size in bits of the type `int' on the
523 target machine. If you don't define this, the default is one
525 #define INT_TYPE_SIZE 32
527 /* A C expression for the size in bits of the type `long' on the
528 target machine. If you don't define this, the default is one
530 #define LONG_TYPE_SIZE (TARGET_32BIT ? 32 : 64)
531 #define MAX_LONG_TYPE_SIZE 64
533 /* A C expression for the size in bits of the type `long long' on the
534 target machine. If you don't define this, the default is two
536 #define LONG_LONG_TYPE_SIZE 64
538 /* A C expression for the size in bits of the type `char' on the
539 target machine. If you don't define this, the default is one
540 quarter of a word. (If this would be less than one storage unit,
541 it is rounded up to one unit.) */
542 #define CHAR_TYPE_SIZE BITS_PER_UNIT
544 /* A C expression for the size in bits of the type `float' on the
545 target machine. If you don't define this, the default is one
547 #define FLOAT_TYPE_SIZE 32
549 /* A C expression for the size in bits of the type `double' on the
550 target machine. If you don't define this, the default is two
552 #define DOUBLE_TYPE_SIZE 64
554 /* A C expression for the size in bits of the type `long double' on
555 the target machine. If you don't define this, the default is two
557 #define LONG_DOUBLE_TYPE_SIZE 64
559 /* Width in bits of a pointer.
560 See also the macro `Pmode' defined below. */
561 #define POINTER_SIZE (TARGET_32BIT ? 32 : 64)
563 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
564 #define PARM_BOUNDARY (TARGET_32BIT ? 32 : 64)
566 /* Boundary (in *bits*) on which stack pointer should be aligned. */
567 #define STACK_BOUNDARY 64
569 /* Allocation boundary (in *bits*) for the code of a function. */
570 #define FUNCTION_BOUNDARY 32
572 /* No data type wants to be aligned rounder than this. */
573 #define BIGGEST_ALIGNMENT 64
575 /* AIX aligns internal doubles in structures on word boundaries. */
576 #define BIGGEST_FIELD_ALIGNMENT 32
578 /* Alignment of field after `int : 0' in a structure. */
579 #define EMPTY_FIELD_BOUNDARY 32
581 /* Every structure's size must be a multiple of this. */
582 #define STRUCTURE_SIZE_BOUNDARY 8
584 /* A bitfield declared as `int' forces `int' alignment for the struct. */
585 #define PCC_BITFIELD_TYPE_MATTERS 1
587 /* Make strings word-aligned so strcpy from constants will be faster. */
588 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
589 (TREE_CODE (EXP) == STRING_CST \
590 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
592 /* Make arrays of chars word-aligned for the same reasons. */
593 #define DATA_ALIGNMENT(TYPE, ALIGN) \
594 (TREE_CODE (TYPE) == ARRAY_TYPE \
595 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
596 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
598 /* Non-zero if move instructions will actually fail to work
599 when given unaligned data. */
600 #define STRICT_ALIGNMENT 0
602 /* Standard register usage. */
604 /* Number of actual hardware registers.
605 The hardware registers are assigned numbers for the compiler
606 from 0 to just below FIRST_PSEUDO_REGISTER.
607 All registers that the compiler knows about must be given numbers,
608 even those that are not normally considered general registers.
610 RS/6000 has 32 fixed-point registers, 32 floating-point registers,
611 an MQ register, a count register, a link register, and 8 condition
612 register fields, which we view here as separate registers.
614 In addition, the difference between the frame and argument pointers is
615 a function of the number of registers saved, so we need to have a
616 register for AP that will later be eliminated in favor of SP or FP.
617 This is a normal register, but it is fixed. */
619 #define FIRST_PSEUDO_REGISTER 76
621 /* 1 for registers that have pervasive standard uses
622 and are not available for the register allocator.
624 On RS/6000, r1 is used for the stack and r2 is used as the TOC pointer.
626 cr5 is not supposed to be used.
628 On System V implementations, r13 is fixed and not available for use. */
634 #define FIXED_REGISTERS \
635 {0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, FIXED_R13, 0, 0, \
636 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
637 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
638 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
639 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0}
641 /* 1 for registers not available across function calls.
642 These must include the FIXED_REGISTERS and also any
643 registers that can be used without being saved.
644 The latter must include the registers where values are returned
645 and the register where structure-value addresses are passed.
646 Aside from that, you can include as many other registers as you like. */
648 #define CALL_USED_REGISTERS \
649 {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, FIXED_R13, 0, 0, \
650 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
651 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, \
652 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
653 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1}
655 /* List the order in which to allocate registers. Each register must be
656 listed once, even those in FIXED_REGISTERS.
658 We allocate in the following order:
659 fp0 (not saved or used for anything)
660 fp13 - fp2 (not saved; incoming fp arg registers)
661 fp1 (not saved; return value)
662 fp31 - fp14 (saved; order given to save least number)
663 cr1, cr6, cr7 (not saved or special)
664 cr0 (not saved, but used for arithmetic operations)
665 cr2, cr3, cr4 (saved)
666 r0 (not saved; cannot be base reg)
667 r9 (not saved; best for TImode)
668 r11, r10, r8-r4 (not saved; highest used first to make less conflict)
669 r3 (not saved; return value register)
670 r31 - r13 (saved; order given to save least number)
671 r12 (not saved; if used for DImode or DFmode would use r13)
672 mq (not saved; best to use it if we can)
673 ctr (not saved; when we have the choice ctr is better)
675 cr5, r1, r2, ap (fixed) */
677 #define REG_ALLOC_ORDER \
679 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, \
681 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, \
682 50, 49, 48, 47, 46, \
683 69, 74, 75, 68, 70, 71, 72, \
685 9, 11, 10, 8, 7, 6, 5, 4, \
687 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, \
688 18, 17, 16, 15, 14, 13, 12, \
692 /* True if register is floating-point. */
693 #define FP_REGNO_P(N) ((N) >= 32 && (N) <= 63)
695 /* True if register is a condition register. */
696 #define CR_REGNO_P(N) ((N) >= 68 && (N) <= 75)
698 /* True if register is an integer register. */
699 #define INT_REGNO_P(N) ((N) <= 31 || (N) == 67)
701 /* Return number of consecutive hard regs needed starting at reg REGNO
702 to hold something of mode MODE.
703 This is ordinarily the length in words of a value of mode MODE
704 but can be less for certain modes in special long registers.
706 On RS/6000, ordinary registers hold 32 bits worth;
707 a single floating point register holds 64 bits worth. */
709 #define HARD_REGNO_NREGS(REGNO, MODE) \
710 (FP_REGNO_P (REGNO) \
711 ? ((GET_MODE_SIZE (MODE) + UNITS_PER_FP_WORD - 1) / UNITS_PER_FP_WORD) \
712 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
714 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
715 For POWER and PowerPC, the GPRs can hold any mode, but the float
716 registers only can hold floating modes and DImode, and CR register only
717 can hold CC modes. We cannot put TImode anywhere except general
718 register and it must be able to fit within the register set. */
720 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
721 (FP_REGNO_P (REGNO) ? \
722 (GET_MODE_CLASS (MODE) == MODE_FLOAT \
723 || (GET_MODE_CLASS (MODE) == MODE_INT \
724 && GET_MODE_SIZE (MODE) == UNITS_PER_FP_WORD)) \
725 : CR_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_CC \
726 : ! INT_REGNO_P (REGNO) ? (GET_MODE_CLASS (MODE) == MODE_INT \
727 && GET_MODE_SIZE (MODE) <= UNITS_PER_WORD) \
730 /* Value is 1 if it is a good idea to tie two pseudo registers
731 when one has mode MODE1 and one has mode MODE2.
732 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
733 for any hard reg, then this must be 0 for correct output. */
734 #define MODES_TIEABLE_P(MODE1, MODE2) \
735 (GET_MODE_CLASS (MODE1) == MODE_FLOAT \
736 ? GET_MODE_CLASS (MODE2) == MODE_FLOAT \
737 : GET_MODE_CLASS (MODE2) == MODE_FLOAT \
738 ? GET_MODE_CLASS (MODE1) == MODE_FLOAT \
739 : GET_MODE_CLASS (MODE1) == MODE_CC \
740 ? GET_MODE_CLASS (MODE2) == MODE_CC \
741 : GET_MODE_CLASS (MODE2) == MODE_CC \
742 ? GET_MODE_CLASS (MODE1) == MODE_CC \
745 /* A C expression returning the cost of moving data from a register of class
746 CLASS1 to one of CLASS2.
748 On the RS/6000, copying between floating-point and fixed-point
749 registers is expensive. */
751 #define REGISTER_MOVE_COST(CLASS1, CLASS2) \
752 ((CLASS1) == FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 2 \
753 : (CLASS1) == FLOAT_REGS && (CLASS2) != FLOAT_REGS ? 10 \
754 : (CLASS1) != FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 10 \
755 : (((CLASS1) == SPECIAL_REGS || (CLASS1) == MQ_REGS \
756 || (CLASS1) == LINK_REGS || (CLASS1) == CTR_REGS \
757 || (CLASS1) == LINK_OR_CTR_REGS) \
758 && ((CLASS2) == SPECIAL_REGS || (CLASS2) == MQ_REGS \
759 || (CLASS2) == LINK_REGS || (CLASS2) == CTR_REGS \
760 || (CLASS2) == LINK_OR_CTR_REGS)) ? 10 \
763 /* A C expressions returning the cost of moving data of MODE from a register to
766 On the RS/6000, bump this up a bit. */
768 #define MEMORY_MOVE_COST(MODE) \
769 ((GET_MODE_CLASS (MODE) == MODE_FLOAT \
770 && (rs6000_cpu == PROCESSOR_RIOS1 || rs6000_cpu == PROCESSOR_PPC601) \
774 /* Specify the cost of a branch insn; roughly the number of extra insns that
775 should be added to avoid a branch.
777 Set this to 3 on the RS/6000 since that is roughly the average cost of an
778 unscheduled conditional branch. */
780 #define BRANCH_COST 3
782 /* A C statement (sans semicolon) to update the integer variable COST
783 based on the relationship between INSN that is dependent on
784 DEP_INSN through the dependence LINK. The default is to make no
785 adjustment to COST. On the RS/6000, ignore the cost of anti- and
786 output-dependencies. In fact, output dependencies on the CR do have
787 a cost, but it is probably not worthwhile to track it. */
789 #define ADJUST_COST(INSN,LINK,DEP_INSN,COST) \
790 (COST) = rs6000_adjust_cost (INSN,LINK,DEP_INSN,COST)
792 /* Define this macro to change register usage conditional on target flags.
793 Set MQ register fixed (already call_used) if not POWER architecture
794 (RIOS1, RIOS2, RSC, and PPC601) so that it will not be allocated.
795 Conditionally disable FPRs. */
797 #define CONDITIONAL_REGISTER_USAGE \
799 if (! TARGET_POWER) \
800 fixed_regs[64] = 1; \
801 if (TARGET_SOFT_FLOAT) \
802 for (i = 32; i < 64; i++) \
803 fixed_regs[i] = call_used_regs[i] = 1; \
806 /* Specify the registers used for certain standard purposes.
807 The values of these macros are register numbers. */
809 /* RS/6000 pc isn't overloaded on a register that the compiler knows about. */
810 /* #define PC_REGNUM */
812 /* Register to use for pushing function arguments. */
813 #define STACK_POINTER_REGNUM 1
815 /* Base register for access to local variables of the function. */
816 #define FRAME_POINTER_REGNUM 31
818 /* Value should be nonzero if functions must have frame pointers.
819 Zero means the frame pointer need not be set up (and parms
820 may be accessed via the stack pointer) in functions that seem suitable.
821 This is computed in `reload', in reload1.c. */
822 #define FRAME_POINTER_REQUIRED 0
824 /* Base register for access to arguments of the function. */
825 #define ARG_POINTER_REGNUM 67
827 /* Place to put static chain when calling a function that requires it. */
828 #define STATIC_CHAIN_REGNUM 11
830 /* count register number for special purposes */
831 #define COUNT_REGISTER_REGNUM 66
833 /* Place that structure value return address is placed.
835 On the RS/6000, it is passed as an extra parameter. */
836 #define STRUCT_VALUE 0
838 /* Define the classes of registers for register constraints in the
839 machine description. Also define ranges of constants.
841 One of the classes must always be named ALL_REGS and include all hard regs.
842 If there is more than one class, another class must be named NO_REGS
843 and contain no registers.
845 The name GENERAL_REGS must be the name of a class (or an alias for
846 another name such as ALL_REGS). This is the class of registers
847 that is allowed by "g" or "r" in a register constraint.
848 Also, registers outside this class are allocated only when
849 instructions express preferences for them.
851 The classes must be numbered in nondecreasing order; that is,
852 a larger-numbered class must never be contained completely
853 in a smaller-numbered class.
855 For any two classes, it is very desirable that there be another
856 class that represents their union. */
858 /* The RS/6000 has three types of registers, fixed-point, floating-point,
859 and condition registers, plus three special registers, MQ, CTR, and the
862 However, r0 is special in that it cannot be used as a base register.
863 So make a class for registers valid as base registers.
865 Also, cr0 is the only condition code register that can be used in
866 arithmetic insns, so make a separate class for it. */
888 #define N_REG_CLASSES (int) LIM_REG_CLASSES
890 /* Give names of register classes as strings for dump file. */
892 #define REG_CLASS_NAMES \
898 "NON_SPECIAL_REGS", \
902 "LINK_OR_CTR_REGS", \
904 "SPEC_OR_GEN_REGS", \
911 /* Define which registers fit in which classes.
912 This is an initializer for a vector of HARD_REG_SET
913 of length N_REG_CLASSES. */
915 #define REG_CLASS_CONTENTS \
917 { 0x00000000, 0x00000000, 0x00000000 }, /* NO_REGS */ \
918 { 0xfffffffe, 0x00000000, 0x00000008 }, /* BASE_REGS */ \
919 { 0xffffffff, 0x00000000, 0x00000008 }, /* GENERAL_REGS */ \
920 { 0x00000000, 0xffffffff, 0x00000000 }, /* FLOAT_REGS */ \
921 { 0xffffffff, 0xffffffff, 0x00000008 }, /* NON_SPECIAL_REGS */ \
922 { 0x00000000, 0x00000000, 0x00000001 }, /* MQ_REGS */ \
923 { 0x00000000, 0x00000000, 0x00000002 }, /* LINK_REGS */ \
924 { 0x00000000, 0x00000000, 0x00000004 }, /* CTR_REGS */ \
925 { 0x00000000, 0x00000000, 0x00000006 }, /* LINK_OR_CTR_REGS */ \
926 { 0x00000000, 0x00000000, 0x00000007 }, /* SPECIAL_REGS */ \
927 { 0xffffffff, 0x00000000, 0x0000000f }, /* SPEC_OR_GEN_REGS */ \
928 { 0x00000000, 0x00000000, 0x00000010 }, /* CR0_REGS */ \
929 { 0x00000000, 0x00000000, 0x00000ff0 }, /* CR_REGS */ \
930 { 0xffffffff, 0x00000000, 0x0000ffff }, /* NON_FLOAT_REGS */ \
931 { 0xffffffff, 0xffffffff, 0x0000ffff } /* ALL_REGS */ \
934 /* The same information, inverted:
935 Return the class number of the smallest class containing
936 reg number REGNO. This could be a conditional expression
937 or could index an array. */
939 #define REGNO_REG_CLASS(REGNO) \
940 ((REGNO) == 0 ? GENERAL_REGS \
941 : (REGNO) < 32 ? BASE_REGS \
942 : FP_REGNO_P (REGNO) ? FLOAT_REGS \
943 : (REGNO) == 68 ? CR0_REGS \
944 : CR_REGNO_P (REGNO) ? CR_REGS \
945 : (REGNO) == 64 ? MQ_REGS \
946 : (REGNO) == 65 ? LINK_REGS \
947 : (REGNO) == 66 ? CTR_REGS \
948 : (REGNO) == 67 ? BASE_REGS \
951 /* The class value for index registers, and the one for base regs. */
952 #define INDEX_REG_CLASS GENERAL_REGS
953 #define BASE_REG_CLASS BASE_REGS
955 /* Get reg_class from a letter such as appears in the machine description. */
957 #define REG_CLASS_FROM_LETTER(C) \
958 ((C) == 'f' ? FLOAT_REGS \
959 : (C) == 'b' ? BASE_REGS \
960 : (C) == 'h' ? SPECIAL_REGS \
961 : (C) == 'q' ? MQ_REGS \
962 : (C) == 'c' ? CTR_REGS \
963 : (C) == 'l' ? LINK_REGS \
964 : (C) == 'x' ? CR0_REGS \
965 : (C) == 'y' ? CR_REGS \
968 /* The letters I, J, K, L, M, N, and P in a register constraint string
969 can be used to stand for particular ranges of immediate operands.
970 This macro defines what the ranges are.
971 C is the letter, and VALUE is a constant value.
972 Return 1 if VALUE is in the range specified by C.
974 `I' is signed 16-bit constants
975 `J' is a constant with only the high-order 16 bits non-zero
976 `K' is a constant with only the low-order 16 bits non-zero
977 `L' is a constant that can be placed into a mask operand
978 `M' is a constant that is greater than 31
979 `N' is a constant that is an exact power of two
980 `O' is the constant zero
981 `P' is a constant whose negation is a signed 16-bit constant */
983 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
984 ( (C) == 'I' ? (unsigned) ((VALUE) + 0x8000) < 0x10000 \
985 : (C) == 'J' ? ((VALUE) & 0xffff) == 0 \
986 : (C) == 'K' ? ((VALUE) & 0xffff0000) == 0 \
987 : (C) == 'L' ? mask_constant (VALUE) \
988 : (C) == 'M' ? (VALUE) > 31 \
989 : (C) == 'N' ? exact_log2 (VALUE) >= 0 \
990 : (C) == 'O' ? (VALUE) == 0 \
991 : (C) == 'P' ? (unsigned) ((- (VALUE)) + 0x8000) < 0x1000 \
994 /* Similar, but for floating constants, and defining letters G and H.
995 Here VALUE is the CONST_DOUBLE rtx itself.
997 We flag for special constants when we can copy the constant into
998 a general register in two insns for DF/DI and one insn for SF.
1000 'H' is used for DI constants that take 3 insns. */
1002 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
1003 ((C) == 'G' ? easy_fp_constant (VALUE, GET_MODE (VALUE)) : \
1004 (C) == 'H' ? (num_insns_constant (VALUE, DImode) == 3) : \
1007 /* Optional extra constraints for this machine.
1009 'Q' means that is a memory operand that is just an offset from a reg.
1010 'R' is for AIX TOC entries.
1011 'S' is for Windows NT SYMBOL_REFs
1012 'T' is for Windows NT LABEL_REFs.
1013 'U' is for V.4 small data references. */
1015 #define EXTRA_CONSTRAINT(OP, C) \
1016 ((C) == 'Q' ? GET_CODE (OP) == MEM && GET_CODE (XEXP (OP, 0)) == REG \
1017 : (C) == 'R' ? LEGITIMATE_CONSTANT_POOL_ADDRESS_P (OP) \
1018 : (C) == 'S' ? (TARGET_WINDOWS_NT && DEFAULT_ABI == ABI_NT && GET_CODE (OP) == SYMBOL_REF)\
1019 : (C) == 'T' ? (TARGET_WINDOWS_NT && DEFAULT_ABI == ABI_NT && GET_CODE (OP) == LABEL_REF) \
1020 : (C) == 'U' ? (DEFAULT_ABI == ABI_V4 && small_data_operand (OP, GET_MODE (OP))) \
1023 /* Given an rtx X being reloaded into a reg required to be
1024 in class CLASS, return the class of reg to actually use.
1025 In general this is just CLASS; but on some machines
1026 in some cases it is preferable to use a more restrictive class.
1028 On the RS/6000, we have to return NO_REGS when we want to reload a
1029 floating-point CONST_DOUBLE to force it to be copied to memory. */
1031 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
1032 ((GET_CODE (X) == CONST_DOUBLE \
1033 && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT) \
1034 ? NO_REGS : (CLASS))
1036 /* Return the register class of a scratch register needed to copy IN into
1037 or out of a register in CLASS in MODE. If it can be done directly,
1038 NO_REGS is returned. */
1040 #define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \
1041 secondary_reload_class (CLASS, MODE, IN)
1043 /* If we are copying between FP registers and anything else, we need a memory
1046 #define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) \
1047 ((CLASS1) != (CLASS2) && ((CLASS1) == FLOAT_REGS || (CLASS2) == FLOAT_REGS))
1049 /* Return the maximum number of consecutive registers
1050 needed to represent mode MODE in a register of class CLASS.
1052 On RS/6000, this is the size of MODE in words,
1053 except in the FP regs, where a single reg is enough for two words. */
1054 #define CLASS_MAX_NREGS(CLASS, MODE) \
1055 ((CLASS) == FLOAT_REGS \
1056 ? ((GET_MODE_SIZE (MODE) + UNITS_PER_FP_WORD - 1) / UNITS_PER_FP_WORD) \
1057 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
1059 /* If defined, gives a class of registers that cannot be used as the
1060 operand of a SUBREG that changes the size of the object. */
1062 #define CLASS_CANNOT_CHANGE_SIZE FLOAT_REGS
1064 /* Stack layout; function entry, exit and calling. */
1066 /* Enumeration to give which calling sequence to use. */
1069 ABI_AIX
, /* IBM's AIX */
1070 ABI_AIX_NODESC
, /* AIX calling sequence minus function descriptors */
1071 ABI_V4
, /* System V.4/eabi */
1072 ABI_NT
/* Windows/NT */
1075 extern enum rs6000_abi rs6000_current_abi
; /* available for use by subtarget */
1077 /* Default ABI to compile code for */
1079 #define DEFAULT_ABI ABI_AIX
1082 /* Structure used to define the rs6000 stack */
1083 typedef struct rs6000_stack
{
1084 int first_gp_reg_save
; /* first callee saved GP register used */
1085 int first_fp_reg_save
; /* first callee saved FP register used */
1086 int lr_save_p
; /* true if the link reg needs to be saved */
1087 int cr_save_p
; /* true if the CR reg needs to be saved */
1088 int toc_save_p
; /* true if the TOC needs to be saved */
1089 int push_p
; /* true if we need to allocate stack space */
1090 int calls_p
; /* true if the function makes any calls */
1091 int main_p
; /* true if this is main */
1092 int main_save_p
; /* true if this is main and we need to save args */
1093 enum rs6000_abi abi
; /* which ABI to use */
1094 int gp_save_offset
; /* offset to save GP regs from initial SP */
1095 int fp_save_offset
; /* offset to save FP regs from initial SP */
1096 int lr_save_offset
; /* offset to save LR from initial SP */
1097 int cr_save_offset
; /* offset to save CR from initial SP */
1098 int toc_save_offset
; /* offset to save the TOC pointer */
1099 int varargs_save_offset
; /* offset to save the varargs registers */
1100 int main_save_offset
; /* offset to save main's args */
1101 int reg_size
; /* register size (4 or 8) */
1102 int varargs_size
; /* size to hold V.4 args passed in regs */
1103 int vars_size
; /* variable save area size */
1104 int parm_size
; /* outgoing parameter size */
1105 int main_size
; /* size to hold saving main's args */
1106 int save_size
; /* save area size */
1107 int fixed_size
; /* fixed size of stack frame */
1108 int gp_size
; /* size of saved GP registers */
1109 int fp_size
; /* size of saved FP registers */
1110 int cr_size
; /* size to hold CR if not in save_size */
1111 int lr_size
; /* size to hold LR if not in save_size */
1112 int toc_size
; /* size to hold TOC if not in save_size */
1113 int total_size
; /* total bytes allocated for stack */
1116 /* Define this if pushing a word on the stack
1117 makes the stack pointer a smaller address. */
1118 #define STACK_GROWS_DOWNWARD
1120 /* Define this if the nominal address of the stack frame
1121 is at the high-address end of the local variables;
1122 that is, each additional local variable allocated
1123 goes at a more negative offset in the frame.
1125 On the RS/6000, we grow upwards, from the area after the outgoing
1127 /* #define FRAME_GROWS_DOWNWARD */
1129 /* Size of the outgoing register save area */
1130 #define RS6000_REG_SAVE (TARGET_32BIT ? 32 : 64)
1132 /* Size of the fixed area on the stack */
1133 #define RS6000_SAVE_AREA (TARGET_32BIT ? 24 : 48)
1135 /* Address to save the TOC register */
1136 #define RS6000_SAVE_TOC plus_constant (stack_pointer_rtx, 20)
1138 /* Whether a separate TOC save area is needed */
1139 extern int rs6000_save_toc_p
;
1141 /* Size of the V.4 varargs area if needed */
1142 #define RS6000_VARARGS_AREA 0
1144 /* Whether a V.4 varargs area is needed */
1145 extern int rs6000_sysv_varargs_p
;
1147 /* Align an address */
1148 #define ALIGN(n,a) (((n) + (a) - 1) & ~((a) - 1))
1150 /* Size of V.4 varargs area in bytes */
1151 #define RS6000_VARARGS_SIZE \
1152 ((GP_ARG_NUM_REG * (TARGET_32BIT ? 4 : 8)) + (FP_ARG_NUM_REG * 8) + 8)
1154 /* Offset of V.4 varargs area */
1155 #define RS6000_VARARGS_OFFSET \
1156 (ALIGN (current_function_outgoing_args_size, 8) + RS6000_SAVE_AREA)
1158 /* Offset within stack frame to start allocating local variables at.
1159 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
1160 first local allocated. Otherwise, it is the offset to the BEGINNING
1161 of the first local allocated.
1163 On the RS/6000, the frame pointer is the same as the stack pointer,
1164 except for dynamic allocations. So we start after the fixed area and
1165 outgoing parameter area. */
1167 #define STARTING_FRAME_OFFSET (ALIGN (current_function_outgoing_args_size, 8) \
1168 + RS6000_VARARGS_AREA \
1171 /* If we generate an insn to push BYTES bytes,
1172 this says how many the stack pointer really advances by.
1173 On RS/6000, don't define this because there are no push insns. */
1174 /* #define PUSH_ROUNDING(BYTES) */
1176 /* Offset of first parameter from the argument pointer register value.
1177 On the RS/6000, we define the argument pointer to the start of the fixed
1179 #define FIRST_PARM_OFFSET(FNDECL) RS6000_SAVE_AREA
1181 /* Define this if stack space is still allocated for a parameter passed
1182 in a register. The value is the number of bytes allocated to this
1184 #define REG_PARM_STACK_SPACE(FNDECL) RS6000_REG_SAVE
1186 /* Define this if the above stack space is to be considered part of the
1187 space allocated by the caller. */
1188 #define OUTGOING_REG_PARM_STACK_SPACE
1190 /* This is the difference between the logical top of stack and the actual sp.
1192 For the RS/6000, sp points past the fixed area. */
1193 #define STACK_POINTER_OFFSET RS6000_SAVE_AREA
1195 /* Define this if the maximum size of all the outgoing args is to be
1196 accumulated and pushed during the prologue. The amount can be
1197 found in the variable current_function_outgoing_args_size. */
1198 #define ACCUMULATE_OUTGOING_ARGS
1200 /* Value is the number of bytes of arguments automatically
1201 popped when returning from a subroutine call.
1202 FUNDECL is the declaration node of the function (as a tree),
1203 FUNTYPE is the data type of the function (as a tree),
1204 or for a library call it is an identifier node for the subroutine name.
1205 SIZE is the number of bytes of arguments passed on the stack. */
1207 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
1209 /* Define how to find the value returned by a function.
1210 VALTYPE is the data type of the value (as a tree).
1211 If the precise function being called is known, FUNC is its FUNCTION_DECL;
1212 otherwise, FUNC is 0.
1214 On RS/6000 an integer value is in r3 and a floating-point value is in
1215 fp1, unless -msoft-float. */
1217 #define FUNCTION_VALUE(VALTYPE, FUNC) \
1218 gen_rtx (REG, TYPE_MODE (VALTYPE), \
1219 TREE_CODE (VALTYPE) == REAL_TYPE && TARGET_HARD_FLOAT ? 33 : 3)
1221 /* Define how to find the value returned by a library function
1222 assuming the value has mode MODE. */
1224 #define LIBCALL_VALUE(MODE) \
1225 gen_rtx (REG, MODE, GET_MODE_CLASS (MODE) == MODE_FLOAT && TARGET_HARD_FLOAT ? 33 : 3)
1227 /* The definition of this macro implies that there are cases where
1228 a scalar value cannot be returned in registers.
1230 For the RS/6000, any structure or union type is returned in memory. */
1232 #define RETURN_IN_MEMORY(TYPE) \
1233 (TYPE_MODE (TYPE) == BLKmode)
1235 /* Minimum and maximum general purpose registers used to hold arguments. */
1236 #define GP_ARG_MIN_REG 3
1237 #define GP_ARG_MAX_REG 10
1238 #define GP_ARG_NUM_REG (GP_ARG_MAX_REG - GP_ARG_MIN_REG + 1)
1240 /* Minimum and maximum floating point registers used to hold arguments. */
1241 #define FP_ARG_MIN_REG 33
1242 #define FP_ARG_AIX_MAX_REG 45
1243 #define FP_ARG_V4_MAX_REG 40
1244 #define FP_ARG_MAX_REG FP_ARG_AIX_MAX_REG
1245 #define FP_ARG_NUM_REG (FP_ARG_MAX_REG - FP_ARG_MIN_REG + 1)
1247 /* Return registers */
1248 #define GP_ARG_RETURN GP_ARG_MIN_REG
1249 #define FP_ARG_RETURN FP_ARG_MIN_REG
1251 /* Flags for the call/call_value rtl operations set up by function_arg */
1252 #define CALL_NORMAL 0x00000000 /* no special processing */
1253 #define CALL_NT_DLLIMPORT 0x00000001 /* NT, this is a DLL import call */
1254 #define CALL_V4_CLEAR_FP_ARGS 0x00000002 /* V.4, no FP args passed */
1255 #define CALL_V4_SET_FP_ARGS 0x00000004 /* V.4, FP args were passed */
1256 #define CALL_LONG 0x00000008 /* always call indirect */
1258 /* Define cutoff for using external functions to save floating point */
1259 #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) == 62 || (FIRST_REG) == 63)
1261 /* 1 if N is a possible register number for a function value
1262 as seen by the caller.
1264 On RS/6000, this is r3 and fp1. */
1265 #define FUNCTION_VALUE_REGNO_P(N) ((N) == GP_ARG_RETURN || ((N) == FP_ARG_RETURN))
1267 /* 1 if N is a possible register number for function argument passing.
1268 On RS/6000, these are r3-r10 and fp1-fp13. */
1269 #define FUNCTION_ARG_REGNO_P(N) \
1270 (((unsigned)((N) - GP_ARG_MIN_REG) < (unsigned)(GP_ARG_NUM_REG)) \
1271 || ((unsigned)((N) - FP_ARG_MIN_REG) < (unsigned)(FP_ARG_NUM_REG)))
1274 /* Define a data type for recording info about an argument list
1275 during the scan of that argument list. This data type should
1276 hold all necessary information about the function itself
1277 and about the args processed so far, enough to enable macros
1278 such as FUNCTION_ARG to determine where the next arg should go.
1280 On the RS/6000, this is a structure. The first element is the number of
1281 total argument words, the second is used to store the next
1282 floating-point register number, and the third says how many more args we
1283 have prototype types for.
1285 The System V.4 varargs/stdarg support requires that this structure's size
1286 be a multiple of sizeof(int), and that WORDS, FREGNO, NARGS_PROTOTYPE,
1287 ORIG_NARGS, and VARARGS_OFFSET be the first five ints. */
1289 typedef struct rs6000_args
1291 int words
; /* # words uses for passing GP registers */
1292 int fregno
; /* next available FP register */
1293 int nargs_prototype
; /* # args left in the current prototype */
1294 int orig_nargs
; /* Original value of nargs_prototype */
1295 int varargs_offset
; /* offset of the varargs save area */
1296 int prototype
; /* Whether a prototype was defined */
1297 int call_cookie
; /* Do special things for this call */
1300 /* Define intermediate macro to compute the size (in registers) of an argument
1303 #define RS6000_ARG_SIZE(MODE, TYPE, NAMED) \
1305 : (MODE) != BLKmode \
1306 ? (GET_MODE_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD \
1307 : (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
1309 /* Initialize a variable CUM of type CUMULATIVE_ARGS
1310 for a call to a function whose data type is FNTYPE.
1311 For a library call, FNTYPE is 0. */
1313 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) \
1314 init_cumulative_args (&CUM, FNTYPE, LIBNAME, FALSE)
1316 /* Similar, but when scanning the definition of a procedure. We always
1317 set NARGS_PROTOTYPE large so we never return an EXPR_LIST. */
1319 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM,FNTYPE,LIBNAME) \
1320 init_cumulative_args (&CUM, FNTYPE, LIBNAME, TRUE)
1322 /* Update the data in CUM to advance over an argument
1323 of mode MODE and data type TYPE.
1324 (TYPE is null for libcalls where that information may not be available.) */
1326 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1327 function_arg_advance (&CUM, MODE, TYPE, NAMED)
1329 /* Non-zero if we can use a floating-point register to pass this arg. */
1330 #define USE_FP_FOR_ARG_P(CUM,MODE,TYPE) \
1331 (GET_MODE_CLASS (MODE) == MODE_FLOAT \
1332 && (CUM).fregno <= FP_ARG_MAX_REG \
1333 && TARGET_HARD_FLOAT)
1335 /* Determine where to put an argument to a function.
1336 Value is zero to push the argument on the stack,
1337 or a hard register in which to store the argument.
1339 MODE is the argument's machine mode.
1340 TYPE is the data type of the argument (as a tree).
1341 This is null for libcalls where that information may
1343 CUM is a variable of type CUMULATIVE_ARGS which gives info about
1344 the preceding args and about the function being called.
1345 NAMED is nonzero if this argument is a named parameter
1346 (otherwise it is an extra parameter matching an ellipsis).
1348 On RS/6000 the first eight words of non-FP are normally in registers
1349 and the rest are pushed. The first 13 FP args are in registers.
1351 If this is floating-point and no prototype is specified, we use
1352 both an FP and integer register (or possibly FP reg and stack). Library
1353 functions (when TYPE is zero) always have the proper types for args,
1354 so we can pass the FP value just in one register. emit_library_function
1355 doesn't support EXPR_LIST anyway. */
1357 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1358 function_arg (&CUM, MODE, TYPE, NAMED)
1360 /* For an arg passed partly in registers and partly in memory,
1361 this is the number of registers used.
1362 For args passed entirely in registers or entirely in memory, zero. */
1364 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
1365 function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED)
1367 /* A C expression that indicates when an argument must be passed by
1368 reference. If nonzero for an argument, a copy of that argument is
1369 made in memory and a pointer to the argument is passed instead of
1370 the argument itself. The pointer is passed in whatever way is
1371 appropriate for passing a pointer to that type. */
1373 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
1374 function_arg_pass_by_reference(&CUM, MODE, TYPE, NAMED)
1376 /* If defined, a C expression that gives the alignment boundary, in bits,
1377 of an argument with the specified mode and type. If it is not defined,
1378 PARM_BOUNDARY is used for all arguments. */
1380 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
1381 function_arg_boundary (MODE, TYPE)
1383 /* Perform any needed actions needed for a function that is receiving a
1384 variable number of arguments.
1388 MODE and TYPE are the mode and type of the current parameter.
1390 PRETEND_SIZE is a variable that should be set to the amount of stack
1391 that must be pushed by the prolog to pretend that our caller pushed
1394 Normally, this macro will push all remaining incoming registers on the
1395 stack and set PRETEND_SIZE to the length of the registers pushed. */
1397 #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \
1398 setup_incoming_varargs (&CUM, MODE, TYPE, &PRETEND_SIZE, NO_RTL)
1400 /* If defined, is a C expression that produces the machine-specific
1401 code for a call to `__builtin_saveregs'. This code will be moved
1402 to the very beginning of the function, before any parameter access
1403 are made. The return value of this function should be an RTX that
1404 contains the value to use as the return of `__builtin_saveregs'.
1406 The argument ARGS is a `tree_list' containing the arguments that
1407 were passed to `__builtin_saveregs'.
1409 If this macro is not defined, the compiler will output an ordinary
1410 call to the library function `__builtin_saveregs'. */
1412 #define EXPAND_BUILTIN_SAVEREGS(ARGS) \
1413 expand_builtin_saveregs (ARGS)
1415 /* This macro generates the assembly code for function entry.
1416 FILE is a stdio stream to output the code to.
1417 SIZE is an int: how many units of temporary storage to allocate.
1418 Refer to the array `regs_ever_live' to determine which registers
1419 to save; `regs_ever_live[I]' is nonzero if register number I
1420 is ever used in the function. This macro is responsible for
1421 knowing which registers should not be saved even if used. */
1423 #define FUNCTION_PROLOGUE(FILE, SIZE) output_prolog (FILE, SIZE)
1425 /* Output assembler code to FILE to increment profiler label # LABELNO
1426 for profiling a function entry. */
1428 #define FUNCTION_PROFILER(FILE, LABELNO) \
1429 output_function_profiler ((FILE), (LABELNO));
1431 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1432 the stack pointer does not matter. No definition is equivalent to
1435 On the RS/6000, this is non-zero because we can restore the stack from
1436 its backpointer, which we maintain. */
1437 #define EXIT_IGNORE_STACK 1
1439 /* This macro generates the assembly code for function exit,
1440 on machines that need it. If FUNCTION_EPILOGUE is not defined
1441 then individual return instructions are generated for each
1442 return statement. Args are same as for FUNCTION_PROLOGUE.
1444 The function epilogue should not depend on the current stack pointer!
1445 It should use the frame pointer only. This is mandatory because
1446 of alloca; we also take advantage of it to omit stack adjustments
1447 before returning. */
1449 #define FUNCTION_EPILOGUE(FILE, SIZE) output_epilog (FILE, SIZE)
1451 /* Output assembler code for a block containing the constant parts
1452 of a trampoline, leaving space for the variable parts.
1454 The trampoline should set the static chain pointer to value placed
1455 into the trampoline and should branch to the specified routine. */
1456 #define TRAMPOLINE_TEMPLATE(FILE) rs6000_trampoline_template (FILE)
1458 /* Length in units of the trampoline for entering a nested function. */
1460 #define TRAMPOLINE_SIZE rs6000_trampoline_size ()
1462 /* Emit RTL insns to initialize the variable parts of a trampoline.
1463 FNADDR is an RTX for the address of the function's pure code.
1464 CXT is an RTX for the static chain value for the function. */
1466 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, CXT) \
1467 rs6000_initialize_trampoline (ADDR, FNADDR, CXT)
1469 /* If defined, a C expression whose value is nonzero if IDENTIFIER
1470 with arguments ARGS is a valid machine specific attribute for DECL.
1471 The attributes in ATTRIBUTES have previously been assigned to DECL. */
1473 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, NAME, ARGS) \
1474 (rs6000_valid_decl_attribute_p (DECL, ATTRIBUTES, NAME, ARGS))
1476 /* If defined, a C expression whose value is nonzero if IDENTIFIER
1477 with arguments ARGS is a valid machine specific attribute for TYPE.
1478 The attributes in ATTRIBUTES have previously been assigned to TYPE. */
1480 #define VALID_MACHINE_TYPE_ATTRIBUTE(TYPE, ATTRIBUTES, NAME, ARGS) \
1481 (rs6000_valid_type_attribute_p (TYPE, ATTRIBUTES, NAME, ARGS))
1483 /* If defined, a C expression whose value is zero if the attributes on
1484 TYPE1 and TYPE2 are incompatible, one if they are compatible, and
1485 two if they are nearly compatible (which causes a warning to be
1488 #define COMP_TYPE_ATTRIBUTES(TYPE1, TYPE2) \
1489 (rs6000_comp_type_attributes (TYPE1, TYPE2))
1491 /* If defined, a C statement that assigns default attributes to newly
1494 #define SET_DEFAULT_TYPE_ATTRIBUTES(TYPE) \
1495 (rs6000_set_default_type_attributes (TYPE))
1498 /* Definitions for __builtin_return_address and __builtin_frame_address.
1499 __builtin_return_address (0) should give link register (65), enable
1501 /* This should be uncommented, so that the link register is used, but
1502 currently this would result in unmatched insns and spilling fixed
1503 registers so we'll leave it for another day. When these problems are
1504 taken care of one additional fetch will be necessary in RETURN_ADDR_RTX.
1506 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */
1508 /* Number of bytes into the frame return addresses can be found. See
1509 rs6000_stack_info in rs6000.c for more information on how the different
1510 abi's store the return address. */
1511 #define RETURN_ADDRESS_OFFSET \
1512 ((DEFAULT_ABI == ABI_AIX \
1513 || DEFAULT_ABI == ABI_AIX_NODESC) ? 8 : \
1514 (DEFAULT_ABI == ABI_V4) ? (TARGET_32BIT ? 4 : 8) : \
1515 (DEFAULT_ABI == ABI_NT) ? -4 : \
1516 (fatal ("RETURN_ADDRESS_OFFSET not supported"), 0))
1518 /* The current return address is in link register (65). The return address
1519 of anything farther back is accessed normally at an offset of 8 from the
1521 #define RETURN_ADDR_RTX(count, frame) \
1523 ? gen_rtx (REG, Pmode, 65) \
1524 : gen_rtx (MEM, Pmode, \
1525 memory_address (Pmode, \
1526 plus_constant (copy_to_reg (gen_rtx (MEM, Pmode, \
1527 memory_address (Pmode, frame))), \
1528 RETURN_ADDRESS_OFFSET))))
1530 /* Definitions for register eliminations.
1532 We have two registers that can be eliminated on the RS/6000. First, the
1533 frame pointer register can often be eliminated in favor of the stack
1534 pointer register. Secondly, the argument pointer register can always be
1535 eliminated; it is replaced with either the stack or frame pointer.
1537 In addition, we use the elimination mechanism to see if r30 is needed
1538 Initially we assume that it isn't. If it is, we spill it. This is done
1539 by making it an eliminable register. We replace it with itself so that
1540 if it isn't needed, then existing uses won't be modified. */
1542 /* This is an array of structures. Each structure initializes one pair
1543 of eliminable registers. The "from" register number is given first,
1544 followed by "to". Eliminations of the same "from" register are listed
1545 in order of preference. */
1546 #define ELIMINABLE_REGS \
1547 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1548 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1549 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
1552 /* Given FROM and TO register numbers, say whether this elimination is allowed.
1553 Frame pointer elimination is automatically handled.
1555 For the RS/6000, if frame pointer elimination is being done, we would like
1556 to convert ap into fp, not sp.
1558 We need r30 if -mminimal-toc was specified, and there are constant pool
1561 #define CAN_ELIMINATE(FROM, TO) \
1562 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
1563 ? ! frame_pointer_needed \
1564 : (FROM) == 30 ? ! TARGET_MINIMAL_TOC || TARGET_NO_TOC || get_pool_size () == 0 \
1567 /* Define the offset between two registers, one to be eliminated, and the other
1568 its replacement, at the start of a routine. */
1569 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1571 rs6000_stack_t *info = rs6000_stack_info (); \
1573 if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
1574 (OFFSET) = (info->push_p) ? 0 : - info->total_size; \
1575 else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \
1576 (OFFSET) = info->total_size; \
1577 else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
1578 (OFFSET) = (info->push_p) ? info->total_size : 0; \
1579 else if ((FROM) == 30) \
1585 /* Addressing modes, and classification of registers for them. */
1587 /* #define HAVE_POST_INCREMENT */
1588 /* #define HAVE_POST_DECREMENT */
1590 #define HAVE_PRE_DECREMENT
1591 #define HAVE_PRE_INCREMENT
1593 /* Macros to check register numbers against specific register classes. */
1595 /* These assume that REGNO is a hard or pseudo reg number.
1596 They give nonzero only if REGNO is a hard reg of the suitable class
1597 or a pseudo reg currently allocated to a suitable hard reg.
1598 Since they use reg_renumber, they are safe only once reg_renumber
1599 has been allocated, which happens in local-alloc.c. */
1601 #define REGNO_OK_FOR_INDEX_P(REGNO) \
1602 ((REGNO) < FIRST_PSEUDO_REGISTER \
1603 ? (REGNO) <= 31 || (REGNO) == 67 \
1604 : (reg_renumber[REGNO] >= 0 \
1605 && (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67)))
1607 #define REGNO_OK_FOR_BASE_P(REGNO) \
1608 ((REGNO) < FIRST_PSEUDO_REGISTER \
1609 ? ((REGNO) > 0 && (REGNO) <= 31) || (REGNO) == 67 \
1610 : (reg_renumber[REGNO] > 0 \
1611 && (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67)))
1613 /* Maximum number of registers that can appear in a valid memory address. */
1615 #define MAX_REGS_PER_ADDRESS 2
1617 /* Recognize any constant value that is a valid address. */
1619 #define CONSTANT_ADDRESS_P(X) \
1620 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
1621 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST \
1622 || GET_CODE (X) == HIGH)
1624 /* Nonzero if the constant value X is a legitimate general operand.
1625 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
1627 On the RS/6000, all integer constants are acceptable, most won't be valid
1628 for particular insns, though. Only easy FP constants are
1631 #define LEGITIMATE_CONSTANT_P(X) \
1632 (GET_CODE (X) != CONST_DOUBLE || GET_MODE (X) == VOIDmode \
1633 || easy_fp_constant (X, GET_MODE (X)))
1635 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
1636 and check its validity for a certain class.
1637 We have two alternate definitions for each of them.
1638 The usual definition accepts all pseudo regs; the other rejects
1639 them unless they have been allocated suitable hard regs.
1640 The symbol REG_OK_STRICT causes the latter definition to be used.
1642 Most source files want to accept pseudo regs in the hope that
1643 they will get allocated to the class that the insn wants them to be in.
1644 Source files for reload pass need to be strict.
1645 After reload, it makes no difference, since pseudo regs have
1646 been eliminated by then. */
1648 #ifndef REG_OK_STRICT
1650 /* Nonzero if X is a hard reg that can be used as an index
1651 or if it is a pseudo reg. */
1652 #define REG_OK_FOR_INDEX_P(X) \
1653 (REGNO (X) <= 31 || REGNO (X) == 67 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
1655 /* Nonzero if X is a hard reg that can be used as a base reg
1656 or if it is a pseudo reg. */
1657 #define REG_OK_FOR_BASE_P(X) \
1658 (REGNO (X) > 0 && REG_OK_FOR_INDEX_P (X))
1662 /* Nonzero if X is a hard reg that can be used as an index. */
1663 #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
1664 /* Nonzero if X is a hard reg that can be used as a base reg. */
1665 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
1669 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
1670 that is a valid memory address for an instruction.
1671 The MODE argument is the machine mode for the MEM expression
1672 that wants to use this address.
1674 On the RS/6000, there are four valid address: a SYMBOL_REF that
1675 refers to a constant pool entry of an address (or the sum of it
1676 plus a constant), a short (16-bit signed) constant plus a register,
1677 the sum of two registers, or a register indirect, possibly with an
1678 auto-increment. For DFmode and DImode with an constant plus register,
1679 we must ensure that both words are addressable or PowerPC64 with offset
1682 #define LEGITIMATE_CONSTANT_POOL_BASE_P(X) \
1683 (TARGET_TOC && GET_CODE (X) == SYMBOL_REF \
1684 && CONSTANT_POOL_ADDRESS_P (X) \
1685 && ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (get_pool_constant (X)))
1687 /* TARGET_64BIT TOC64 guaranteed to have 64 bit alignment. */
1688 #define LEGITIMATE_CONSTANT_POOL_ADDRESS_P(X) \
1689 (LEGITIMATE_CONSTANT_POOL_BASE_P (X) \
1691 && GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
1692 && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \
1693 && LEGITIMATE_CONSTANT_POOL_BASE_P (XEXP (XEXP (X, 0), 0))))
1695 #define LEGITIMATE_SMALL_DATA_P(MODE, X) \
1696 (DEFAULT_ABI == ABI_V4 \
1697 && (GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == CONST) \
1698 && small_data_operand (X, MODE))
1700 #define LEGITIMATE_ADDRESS_INTEGER_P(X,OFFSET) \
1701 (GET_CODE (X) == CONST_INT \
1702 && (unsigned) (INTVAL (X) + (OFFSET) + 0x8000) < 0x10000)
1704 #define LEGITIMATE_OFFSET_ADDRESS_P(MODE,X) \
1705 (GET_CODE (X) == PLUS \
1706 && GET_CODE (XEXP (X, 0)) == REG \
1707 && REG_OK_FOR_BASE_P (XEXP (X, 0)) \
1708 && LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 0) \
1709 && (((MODE) != DFmode && (MODE) != DImode) \
1711 ? LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 4) \
1712 : ! (INTVAL (XEXP (X, 1)) & 3))) \
1713 && ((MODE) != TImode \
1715 ? LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 12) \
1716 : (LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 8) \
1717 && ! (INTVAL (XEXP (X, 1)) & 3)))))
1719 #define LEGITIMATE_INDEXED_ADDRESS_P(X) \
1720 (GET_CODE (X) == PLUS \
1721 && GET_CODE (XEXP (X, 0)) == REG \
1722 && GET_CODE (XEXP (X, 1)) == REG \
1723 && ((REG_OK_FOR_BASE_P (XEXP (X, 0)) \
1724 && REG_OK_FOR_INDEX_P (XEXP (X, 1))) \
1725 || (REG_OK_FOR_BASE_P (XEXP (X, 1)) \
1726 && REG_OK_FOR_INDEX_P (XEXP (X, 0)))))
1728 #define LEGITIMATE_INDIRECT_ADDRESS_P(X) \
1729 (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))
1731 #define LEGITIMATE_LO_SUM_ADDRESS_P(MODE, X) \
1733 && (MODE) != DImode \
1734 && (MODE) != TImode \
1735 && (TARGET_HARD_FLOAT || (MODE) != DFmode) \
1736 && GET_CODE (X) == LO_SUM \
1737 && GET_CODE (XEXP (X, 0)) == REG \
1738 && REG_OK_FOR_BASE_P (XEXP (X, 0)) \
1739 && CONSTANT_P (XEXP (X, 1)))
1741 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
1742 { if (LEGITIMATE_INDIRECT_ADDRESS_P (X)) \
1744 if ((GET_CODE (X) == PRE_INC || GET_CODE (X) == PRE_DEC) \
1745 && LEGITIMATE_INDIRECT_ADDRESS_P (XEXP (X, 0))) \
1747 if (LEGITIMATE_SMALL_DATA_P (MODE, X)) \
1749 if (LEGITIMATE_CONSTANT_POOL_ADDRESS_P (X)) \
1751 if (LEGITIMATE_OFFSET_ADDRESS_P (MODE, X)) \
1753 if ((MODE) != TImode \
1754 && (TARGET_HARD_FLOAT || TARGET_64BIT || (MODE) != DFmode) \
1755 && (TARGET_64BIT || (MODE) != DImode) \
1756 && LEGITIMATE_INDEXED_ADDRESS_P (X)) \
1758 if (LEGITIMATE_LO_SUM_ADDRESS_P (MODE, X)) \
1762 /* Try machine-dependent ways of modifying an illegitimate address
1763 to be legitimate. If we find one, return the new, valid address.
1764 This macro is used in only one place: `memory_address' in explow.c.
1766 OLDX is the address as it was before break_out_memory_refs was called.
1767 In some cases it is useful to look at this to decide what needs to be done.
1769 MODE and WIN are passed so that this macro can use
1770 GO_IF_LEGITIMATE_ADDRESS.
1772 It is always safe for this macro to do nothing. It exists to recognize
1773 opportunities to optimize the output.
1775 On RS/6000, first check for the sum of a register with a constant
1776 integer that is out of range. If so, generate code to add the
1777 constant with the low-order 16 bits masked to the register and force
1778 this result into another register (this can be done with `cau').
1779 Then generate an address of REG+(CONST&0xffff), allowing for the
1780 possibility of bit 16 being a one.
1782 Then check for the sum of a register and something not constant, try to
1783 load the other things into a register and return the sum. */
1785 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \
1786 { if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
1787 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1788 && (unsigned) (INTVAL (XEXP (X, 1)) + 0x8000) >= 0x10000) \
1789 { HOST_WIDE_INT high_int, low_int; \
1791 high_int = INTVAL (XEXP (X, 1)) & (~ (HOST_WIDE_INT) 0xffff); \
1792 low_int = INTVAL (XEXP (X, 1)) & 0xffff; \
1793 if (low_int & 0x8000) \
1794 high_int += 0x10000, low_int |= ((HOST_WIDE_INT) -1) << 16; \
1795 sum = force_operand (gen_rtx (PLUS, Pmode, XEXP (X, 0), \
1796 GEN_INT (high_int)), 0); \
1797 (X) = gen_rtx (PLUS, Pmode, sum, GEN_INT (low_int)); \
1800 else if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
1801 && GET_CODE (XEXP (X, 1)) != CONST_INT \
1802 && (TARGET_HARD_FLOAT || TARGET_64BIT || (MODE) != DFmode) \
1803 && (TARGET_64BIT || (MODE) != DImode) \
1804 && (MODE) != TImode) \
1806 (X) = gen_rtx (PLUS, Pmode, XEXP (X, 0), \
1807 force_reg (Pmode, force_operand (XEXP (X, 1), 0))); \
1810 else if (TARGET_ELF && TARGET_32BIT && TARGET_NO_TOC \
1811 && GET_CODE (X) != CONST_INT \
1812 && GET_CODE (X) != CONST_DOUBLE && CONSTANT_P (X) \
1813 && (TARGET_HARD_FLOAT || (MODE) != DFmode) \
1814 && (MODE) != DImode && (MODE) != TImode) \
1816 rtx reg = gen_reg_rtx (Pmode); \
1817 emit_insn (gen_elf_high (reg, (X))); \
1818 (X) = gen_rtx (LO_SUM, Pmode, reg, (X)); \
1822 /* Go to LABEL if ADDR (a legitimate address expression)
1823 has an effect that depends on the machine mode it is used for.
1825 On the RS/6000 this is true if the address is valid with a zero offset
1826 but not with an offset of four (this means it cannot be used as an
1827 address for DImode or DFmode) or is a pre-increment or decrement. Since
1828 we know it is valid, we just check for an address that is not valid with
1829 an offset of four. */
1831 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
1832 { if (GET_CODE (ADDR) == PLUS \
1833 && LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), 0) \
1834 && ! LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), \
1835 (TARGET_32BIT ? 4 : 8))) \
1837 if (GET_CODE (ADDR) == PRE_INC) \
1839 if (GET_CODE (ADDR) == PRE_DEC) \
1841 if (GET_CODE (ADDR) == LO_SUM) \
1845 /* Define this if some processing needs to be done immediately before
1846 emitting code for an insn. */
1848 /* #define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS) */
1850 /* Specify the machine mode that this machine uses
1851 for the index in the tablejump instruction. */
1852 #define CASE_VECTOR_MODE (TARGET_32BIT ? SImode : DImode)
1854 /* Define this if the tablejump instruction expects the table
1855 to contain offsets from the address of the table.
1856 Do not define this if the table should contain absolute addresses. */
1857 #define CASE_VECTOR_PC_RELATIVE
1859 /* Specify the tree operation to be used to convert reals to integers. */
1860 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
1862 /* This is the kind of divide that is easiest to do in the general case. */
1863 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1865 /* Define this as 1 if `char' should by default be signed; else as 0. */
1866 #define DEFAULT_SIGNED_CHAR 0
1868 /* This flag, if defined, says the same insns that convert to a signed fixnum
1869 also convert validly to an unsigned one. */
1871 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
1873 /* Max number of bytes we can move from memory to memory
1874 in one reasonably fast instruction. */
1875 #define MOVE_MAX (! TARGET_POWERPC64 ? 4 : 8)
1876 #define MAX_MOVE_MAX 8
1878 /* Nonzero if access to memory by bytes is no faster than for words.
1879 Also non-zero if doing byte operations (specifically shifts) in registers
1881 #define SLOW_BYTE_ACCESS 1
1883 /* Define if operations between registers always perform the operation
1884 on the full register even if a narrower mode is specified. */
1885 #define WORD_REGISTER_OPERATIONS
1887 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD
1888 will either zero-extend or sign-extend. The value of this macro should
1889 be the code that says which one of the two operations is implicitly
1890 done, NIL if none. */
1891 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
1893 /* Define if loading short immediate values into registers sign extends. */
1894 #define SHORT_IMMEDIATES_SIGN_EXTEND
1896 /* The RS/6000 uses the XCOFF format. */
1898 #define XCOFF_DEBUGGING_INFO
1900 /* Define if the object format being used is COFF or a superset. */
1901 #define OBJECT_FORMAT_COFF
1903 /* Define the magic numbers that we recognize as COFF. */
1905 #define MY_ISCOFF(magic) \
1906 ((magic) == U802WRMAGIC || (magic) == U802ROMAGIC || (magic) == U802TOCMAGIC)
1908 /* This is the only version of nm that collect2 can work with. */
1909 #define REAL_NM_FILE_NAME "/usr/ucb/nm"
1911 /* We don't have GAS for the RS/6000 yet, so don't write out special
1912 .stabs in cc1plus. */
1914 #define FASCIST_ASSEMBLER
1916 #ifndef ASM_OUTPUT_CONSTRUCTOR
1917 #define ASM_OUTPUT_CONSTRUCTOR(file, name)
1919 #ifndef ASM_OUTPUT_DESTRUCTOR
1920 #define ASM_OUTPUT_DESTRUCTOR(file, name)
1923 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1924 is done just by pretending it is already truncated. */
1925 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1927 /* Specify the machine mode that pointers have.
1928 After generation of rtl, the compiler makes no further distinction
1929 between pointers and any other objects of this machine mode. */
1930 #define Pmode (TARGET_32BIT ? SImode : DImode)
1932 /* Mode of a function address in a call instruction (for indexing purposes).
1934 Doesn't matter on RS/6000. */
1935 #define FUNCTION_MODE (TARGET_32BIT ? SImode : DImode)
1937 /* Define this if addresses of constant functions
1938 shouldn't be put through pseudo regs where they can be cse'd.
1939 Desirable on machines where ordinary constants are expensive
1940 but a CALL with constant address is cheap. */
1941 #define NO_FUNCTION_CSE
1943 /* Define this to be nonzero if shift instructions ignore all but the low-order
1946 The sle and sre instructions which allow SHIFT_COUNT_TRUNCATED
1947 have been dropped from the PowerPC architecture. */
1949 #define SHIFT_COUNT_TRUNCATED (TARGET_POWER ? 1 : 0)
1951 /* Use atexit for static constructors/destructors, instead of defining
1952 our own exit function. */
1955 /* Compute the cost of computing a constant rtl expression RTX
1956 whose rtx-code is CODE. The body of this macro is a portion
1957 of a switch statement. If the code is computed here,
1958 return it with a return statement. Otherwise, break from the switch.
1960 On the RS/6000, if it is valid in the insn, it is free. So this
1961 always returns 0. */
1963 #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
1968 case CONST_DOUBLE: \
1972 /* Provide the costs of a rtl expression. This is in the body of a
1975 #define RTX_COSTS(X,CODE,OUTER_CODE) \
1977 switch (rs6000_cpu) \
1979 case PROCESSOR_RIOS1: \
1980 return (GET_CODE (XEXP (X, 1)) != CONST_INT \
1981 ? COSTS_N_INSNS (5) \
1982 : INTVAL (XEXP (X, 1)) >= -256 && INTVAL (XEXP (X, 1)) <= 255 \
1983 ? COSTS_N_INSNS (3) : COSTS_N_INSNS (4)); \
1984 case PROCESSOR_RIOS2: \
1985 case PROCESSOR_MPCCORE: \
1986 return COSTS_N_INSNS (2); \
1987 case PROCESSOR_PPC601: \
1988 return COSTS_N_INSNS (5); \
1989 case PROCESSOR_PPC603: \
1990 return (GET_CODE (XEXP (X, 1)) != CONST_INT \
1991 ? COSTS_N_INSNS (5) \
1992 : INTVAL (XEXP (X, 1)) >= -256 && INTVAL (XEXP (X, 1)) <= 255 \
1993 ? COSTS_N_INSNS (2) : COSTS_N_INSNS (3)); \
1994 case PROCESSOR_PPC403: \
1995 case PROCESSOR_PPC604: \
1996 case PROCESSOR_PPC620: \
1997 return COSTS_N_INSNS (4); \
2001 if (GET_CODE (XEXP (X, 1)) == CONST_INT \
2002 && exact_log2 (INTVAL (XEXP (X, 1))) >= 0) \
2003 return COSTS_N_INSNS (2); \
2004 /* otherwise fall through to normal divide. */ \
2007 switch (rs6000_cpu) \
2009 case PROCESSOR_RIOS1: \
2010 return COSTS_N_INSNS (19); \
2011 case PROCESSOR_RIOS2: \
2012 return COSTS_N_INSNS (13); \
2013 case PROCESSOR_MPCCORE: \
2014 return COSTS_N_INSNS (6); \
2015 case PROCESSOR_PPC403: \
2016 return COSTS_N_INSNS (33); \
2017 case PROCESSOR_PPC601: \
2018 return COSTS_N_INSNS (36); \
2019 case PROCESSOR_PPC603: \
2020 return COSTS_N_INSNS (37); \
2021 case PROCESSOR_PPC604: \
2022 case PROCESSOR_PPC620: \
2023 return COSTS_N_INSNS (20); \
2026 return COSTS_N_INSNS (4); \
2028 /* MEM should be slightly more expensive than (plus (reg) (const)) */ \
2031 /* Compute the cost of an address. This is meant to approximate the size
2032 and/or execution delay of an insn using that address. If the cost is
2033 approximated by the RTL complexity, including CONST_COSTS above, as
2034 is usually the case for CISC machines, this macro should not be defined.
2035 For aggressively RISCy machines, only one insn format is allowed, so
2036 this macro should be a constant. The value of this macro only matters
2037 for valid addresses.
2039 For the RS/6000, everything is cost 0. */
2041 #define ADDRESS_COST(RTX) 0
2043 /* Adjust the length of an INSN. LENGTH is the currently-computed length and
2044 should be adjusted to reflect any required changes. This macro is used when
2045 there is some systematic length adjustment required that would be difficult
2046 to express in the length attribute. */
2048 /* #define ADJUST_INSN_LENGTH(X,LENGTH) */
2050 /* Add any extra modes needed to represent the condition code.
2052 For the RS/6000, we need separate modes when unsigned (logical) comparisons
2053 are being done and we need a separate mode for floating-point. We also
2054 use a mode for the case when we are comparing the results of two
2057 #define EXTRA_CC_MODES CCUNSmode, CCFPmode, CCEQmode
2059 /* Define the names for the modes specified above. */
2060 #define EXTRA_CC_NAMES "CCUNS", "CCFP", "CCEQ"
2062 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
2063 return the mode to be used for the comparison. For floating-point, CCFPmode
2064 should be used. CCUNSmode should be used for unsigned comparisons.
2065 CCEQmode should be used when we are doing an inequality comparison on
2066 the result of a comparison. CCmode should be used in all other cases. */
2068 #define SELECT_CC_MODE(OP,X,Y) \
2069 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? CCFPmode \
2070 : (OP) == GTU || (OP) == LTU || (OP) == GEU || (OP) == LEU ? CCUNSmode \
2071 : (((OP) == EQ || (OP) == NE) && GET_RTX_CLASS (GET_CODE (X)) == '<' \
2072 ? CCEQmode : CCmode))
2074 /* Define the information needed to generate branch and scc insns. This is
2075 stored from the compare operation. Note that we can't use "rtx" here
2076 since it hasn't been defined! */
2078 extern struct rtx_def
*rs6000_compare_op0
, *rs6000_compare_op1
;
2079 extern int rs6000_compare_fp_p
;
2081 /* Set to non-zero by "fix" operation to indicate that itrunc and
2082 uitrunc must be defined. */
2084 extern int rs6000_trunc_used
;
2086 /* Function names to call to do floating point truncation. */
2088 #define RS6000_ITRUNC "itrunc"
2089 #define RS6000_UITRUNC "uitrunc"
2091 /* Prefix and suffix to use to saving floating point */
2092 #ifndef SAVE_FP_PREFIX
2093 #define SAVE_FP_PREFIX "._savef"
2094 #define SAVE_FP_SUFFIX ""
2097 /* Prefix and suffix to use to restoring floating point */
2098 #ifndef RESTORE_FP_PREFIX
2099 #define RESTORE_FP_PREFIX "._restf"
2100 #define RESTORE_FP_SUFFIX ""
2104 /* Control the assembler format that we output. */
2106 /* Common macro to output the options used to the asm file. */
2107 #define ASM_OUTPUT_OPTIONS(FILE) \
2108 output_options (FILE, \
2109 f_options, sizeof (f_options) / sizeof (f_options[0]), \
2110 W_options, sizeof (W_options) / sizeof (W_options[0])) \
2112 /* Output at beginning of assembler file.
2114 Initialize the section names for the RS/6000 at this point.
2116 Specify filename to assembler.
2118 We want to go into the TOC section so at least one .toc will be emitted.
2119 Also, in order to output proper .bs/.es pairs, we need at least one static
2120 [RW] section emitted.
2122 We then switch back to text to force the gcc2_compiled. label and the space
2123 allocated after it (when profiling) into the text section.
2125 Finally, declare mcount when profiling to make the assembler happy. */
2127 #define ASM_FILE_START(FILE) \
2129 ASM_OUTPUT_OPTIONS (FILE); \
2130 rs6000_gen_section_name (&xcoff_bss_section_name, \
2131 main_input_filename, ".bss_"); \
2132 rs6000_gen_section_name (&xcoff_private_data_section_name, \
2133 main_input_filename, ".rw_"); \
2134 rs6000_gen_section_name (&xcoff_read_only_section_name, \
2135 main_input_filename, ".ro_"); \
2137 output_file_directive (FILE, main_input_filename); \
2139 if (write_symbols != NO_DEBUG) \
2140 private_data_section (); \
2143 fputs ("\t.extern .mcount\n", FILE); \
2146 /* Output at end of assembler file.
2148 On the RS/6000, referencing data should automatically pull in text. */
2150 #define ASM_FILE_END(FILE) \
2153 fputs ("_section_.text:\n", FILE); \
2155 fputs ("\t.long _section_.text\n", FILE); \
2158 /* We define this to prevent the name mangler from putting dollar signs into
2161 #define NO_DOLLAR_IN_LABEL
2163 /* We define this to 0 so that gcc will never accept a dollar sign in a
2164 variable name. This is needed because the AIX assembler will not accept
2167 #define DOLLARS_IN_IDENTIFIERS 0
2169 /* Implicit library calls should use memcpy, not bcopy, etc. */
2171 #define TARGET_MEM_FUNCTIONS
2173 /* Define the extra sections we need. We define three: one is the read-only
2174 data section which is used for constants. This is a csect whose name is
2175 derived from the name of the input file. The second is for initialized
2176 global variables. This is a csect whose name is that of the variable.
2177 The third is the TOC. */
2179 #define EXTRA_SECTIONS \
2180 read_only_data, private_data, read_only_private_data, toc, bss
2182 /* Define the name of our readonly data section. */
2184 #define READONLY_DATA_SECTION read_only_data_section
2186 /* If we are referencing a function that is static or is known to be
2187 in this file, make the SYMBOL_REF special. We can use this to indicate
2188 that we can branch to this function without emitting a no-op after the
2191 #define ENCODE_SECTION_INFO(DECL) \
2192 if (TREE_CODE (DECL) == FUNCTION_DECL \
2193 && (TREE_ASM_WRITTEN (DECL) || ! TREE_PUBLIC (DECL))) \
2194 SYMBOL_REF_FLAG (XEXP (DECL_RTL (DECL), 0)) = 1;
2196 /* Indicate that jump tables go in the text section. */
2198 #define JUMP_TABLES_IN_TEXT_SECTION
2200 /* Define the routines to implement these extra sections. */
2202 #define EXTRA_SECTION_FUNCTIONS \
2205 read_only_data_section () \
2207 if (in_section != read_only_data) \
2209 fprintf (asm_out_file, ".csect %s[RO]\n", \
2210 xcoff_read_only_section_name); \
2211 in_section = read_only_data; \
2216 private_data_section () \
2218 if (in_section != private_data) \
2220 fprintf (asm_out_file, ".csect %s[RW]\n", \
2221 xcoff_private_data_section_name); \
2223 in_section = private_data; \
2228 read_only_private_data_section () \
2230 if (in_section != read_only_private_data) \
2232 fprintf (asm_out_file, ".csect %s[RO]\n", \
2233 xcoff_private_data_section_name); \
2234 in_section = read_only_private_data; \
2241 if (TARGET_MINIMAL_TOC) \
2243 static int toc_initialized = 0; \
2245 /* toc_section is always called at least once from ASM_FILE_START, \
2246 so this is guaranteed to always be defined once and only once \
2248 if (! toc_initialized) \
2250 fputs (".toc\nLCTOC..0:\n", asm_out_file); \
2251 fputs ("\t.tc toc_table[TC],toc_table[RW]\n", asm_out_file); \
2252 toc_initialized = 1; \
2255 if (in_section != toc) \
2256 fputs (".csect toc_table[RW]\n", asm_out_file); \
2260 if (in_section != toc) \
2261 fputs (".toc\n", asm_out_file); \
2266 /* This macro produces the initial definition of a function name.
2267 On the RS/6000, we need to place an extra '.' in the function name and
2268 output the function descriptor.
2270 The csect for the function will have already been created by the
2271 `text_section' call previously done. We do have to go back to that
2274 /* ??? What do the 16 and 044 in the .function line really mean? */
2276 #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL) \
2277 { if (TREE_PUBLIC (DECL)) \
2279 fputs ("\t.globl .", FILE); \
2280 RS6000_OUTPUT_BASENAME (FILE, NAME); \
2281 putc ('\n', FILE); \
2285 fputs ("\t.lglobl .", FILE); \
2286 RS6000_OUTPUT_BASENAME (FILE, NAME); \
2287 putc ('\n', FILE); \
2289 fputs (".csect ", FILE); \
2290 RS6000_OUTPUT_BASENAME (FILE, NAME); \
2291 fputs ("[DS]\n", FILE); \
2292 RS6000_OUTPUT_BASENAME (FILE, NAME); \
2293 fputs (":\n", FILE); \
2294 fputs ((TARGET_32BIT) ? "\t.long ." : "\t.llong .", FILE); \
2295 RS6000_OUTPUT_BASENAME (FILE, NAME); \
2296 fputs (", TOC[tc0], 0\n", FILE); \
2297 fputs (".csect .text[PR]\n.", FILE); \
2298 RS6000_OUTPUT_BASENAME (FILE, NAME); \
2299 fputs (":\n", FILE); \
2300 if (write_symbols == XCOFF_DEBUG) \
2301 xcoffout_declare_function (FILE, DECL, NAME); \
2304 /* Return non-zero if this entry is to be written into the constant pool
2305 in a special way. We do so if this is a SYMBOL_REF, LABEL_REF or a CONST
2306 containing one of them. If -mfp-in-toc (the default), we also do
2307 this for floating-point constants. We actually can only do this
2308 if the FP formats of the target and host machines are the same, but
2309 we can't check that since not every file that uses
2310 GO_IF_LEGITIMATE_ADDRESS_P includes real.h. */
2312 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X) \
2314 && (GET_CODE (X) == SYMBOL_REF \
2315 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
2316 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \
2317 || GET_CODE (X) == LABEL_REF \
2318 || (! (TARGET_NO_FP_IN_TOC && ! TARGET_MINIMAL_TOC) \
2319 && GET_CODE (X) == CONST_DOUBLE \
2320 && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
2321 && BITS_PER_WORD == HOST_BITS_PER_INT)))
2323 /* Select section for constant in constant pool.
2325 On RS/6000, all constants are in the private read-only data area.
2326 However, if this is being placed in the TOC it must be output as a
2329 #define SELECT_RTX_SECTION(MODE, X) \
2330 { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \
2333 read_only_private_data_section (); \
2336 /* Macro to output a special constant pool entry. Go to WIN if we output
2337 it. Otherwise, it is written the usual way.
2339 On the RS/6000, toc entries are handled this way. */
2341 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, WIN) \
2342 { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \
2344 output_toc (FILE, X, LABELNO); \
2349 /* Select the section for an initialized data object.
2351 On the RS/6000, we have a special section for all variables except those
2354 #define SELECT_SECTION(EXP,RELOC) \
2356 if ((TREE_CODE (EXP) == STRING_CST \
2357 && !flag_writable_strings) \
2358 || (TREE_CODE_CLASS (TREE_CODE (EXP)) == 'd' \
2359 && TREE_READONLY (EXP) && ! TREE_THIS_VOLATILE (EXP) \
2360 && DECL_INITIAL (EXP) \
2361 && (DECL_INITIAL (EXP) == error_mark_node \
2362 || TREE_CONSTANT (DECL_INITIAL (EXP))) \
2365 if (TREE_PUBLIC (EXP)) \
2366 read_only_data_section (); \
2368 read_only_private_data_section (); \
2372 if (TREE_PUBLIC (EXP)) \
2375 private_data_section (); \
2379 /* This outputs NAME to FILE up to the first null or '['. */
2381 #define RS6000_OUTPUT_BASENAME(FILE, NAME) \
2385 STRIP_NAME_ENCODING (_p, (NAME)); \
2386 assemble_name ((FILE), _p); \
2389 /* Remove any trailing [DS] or the like from the symbol name. */
2391 #define STRIP_NAME_ENCODING(VAR,NAME) \
2394 char *_name = (NAME); \
2396 if (_name[0] == '*') \
2398 _len = strlen (_name); \
2399 if (_name[_len - 1] != ']') \
2403 (VAR) = (char *) alloca (_len + 1); \
2404 strcpy ((VAR), _name); \
2405 (VAR)[_len - 4] = '\0'; \
2410 /* Output something to declare an external symbol to the assembler. Most
2411 assemblers don't need this.
2413 If we haven't already, add "[RW]" (or "[DS]" for a function) to the
2414 name. Normally we write this out along with the name. In the few cases
2415 where we can't, it gets stripped off. */
2417 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
2418 { rtx _symref = XEXP (DECL_RTL (DECL), 0); \
2419 if ((TREE_CODE (DECL) == VAR_DECL \
2420 || TREE_CODE (DECL) == FUNCTION_DECL) \
2421 && (NAME)[strlen (NAME) - 1] != ']') \
2423 char *_name = (char *) permalloc (strlen (XSTR (_symref, 0)) + 5); \
2424 strcpy (_name, XSTR (_symref, 0)); \
2425 strcat (_name, TREE_CODE (DECL) == FUNCTION_DECL ? "[DS]" : "[RW]"); \
2426 XSTR (_symref, 0) = _name; \
2428 fputs ("\t.extern ", FILE); \
2429 assemble_name (FILE, XSTR (_symref, 0)); \
2430 if (TREE_CODE (DECL) == FUNCTION_DECL) \
2432 fputs ("\n\t.extern .", FILE); \
2433 RS6000_OUTPUT_BASENAME (FILE, XSTR (_symref, 0)); \
2435 putc ('\n', FILE); \
2438 /* Similar, but for libcall. We only have to worry about the function name,
2439 not that of the descriptor. */
2441 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
2442 { fputs ("\t.extern .", FILE); \
2443 assemble_name (FILE, XSTR (FUN, 0)); \
2444 putc ('\n', FILE); \
2447 /* Output to assembler file text saying following lines
2448 may contain character constants, extra white space, comments, etc. */
2450 #define ASM_APP_ON ""
2452 /* Output to assembler file text saying following lines
2453 no longer contain unusual constructs. */
2455 #define ASM_APP_OFF ""
2457 /* Output before instructions. */
2459 #define TEXT_SECTION_ASM_OP ".csect .text[PR]"
2461 /* Output before writable data. */
2463 #define DATA_SECTION_ASM_OP ".csect .data[RW]"
2465 /* How to refer to registers in assembler output.
2466 This sequence is indexed by compiler's hard-register-number (see above). */
2468 #define REGISTER_NAMES \
2469 {"0", "1", "2", "3", "4", "5", "6", "7", \
2470 "8", "9", "10", "11", "12", "13", "14", "15", \
2471 "16", "17", "18", "19", "20", "21", "22", "23", \
2472 "24", "25", "26", "27", "28", "29", "30", "31", \
2473 "0", "1", "2", "3", "4", "5", "6", "7", \
2474 "8", "9", "10", "11", "12", "13", "14", "15", \
2475 "16", "17", "18", "19", "20", "21", "22", "23", \
2476 "24", "25", "26", "27", "28", "29", "30", "31", \
2477 "mq", "lr", "ctr", "ap", \
2478 "0", "1", "2", "3", "4", "5", "6", "7" }
2480 /* Table of additional register names to use in user input. */
2482 #define ADDITIONAL_REGISTER_NAMES \
2483 {"r0", 0, "r1", 1, "r2", 2, "r3", 3, \
2484 "r4", 4, "r5", 5, "r6", 6, "r7", 7, \
2485 "r8", 8, "r9", 9, "r10", 10, "r11", 11, \
2486 "r12", 12, "r13", 13, "r14", 14, "r15", 15, \
2487 "r16", 16, "r17", 17, "r18", 18, "r19", 19, \
2488 "r20", 20, "r21", 21, "r22", 22, "r23", 23, \
2489 "r24", 24, "r25", 25, "r26", 26, "r27", 27, \
2490 "r28", 28, "r29", 29, "r30", 30, "r31", 31, \
2491 "fr0", 32, "fr1", 33, "fr2", 34, "fr3", 35, \
2492 "fr4", 36, "fr5", 37, "fr6", 38, "fr7", 39, \
2493 "fr8", 40, "fr9", 41, "fr10", 42, "fr11", 43, \
2494 "fr12", 44, "fr13", 45, "fr14", 46, "fr15", 47, \
2495 "fr16", 48, "fr17", 49, "fr18", 50, "fr19", 51, \
2496 "fr20", 52, "fr21", 53, "fr22", 54, "fr23", 55, \
2497 "fr24", 56, "fr25", 57, "fr26", 58, "fr27", 59, \
2498 "fr28", 60, "fr29", 61, "fr30", 62, "fr31", 63, \
2499 /* no additional names for: mq, lr, ctr, ap */ \
2500 "cr0", 68, "cr1", 69, "cr2", 70, "cr3", 71, \
2501 "cr4", 72, "cr5", 73, "cr6", 74, "cr7", 75, \
2504 /* How to renumber registers for dbx and gdb. */
2506 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
2508 /* Text to write out after a CALL that may be replaced by glue code by
2509 the loader. This depends on the AIX version. */
2510 #define RS6000_CALL_GLUE "cror 31,31,31"
2512 /* This is how to output the definition of a user-level label named NAME,
2513 such as the label on a static function or variable NAME. */
2515 #define ASM_OUTPUT_LABEL(FILE,NAME) \
2516 do { RS6000_OUTPUT_BASENAME (FILE, NAME); fputs (":\n", FILE); } while (0)
2518 /* This is how to output a command to make the user-level label named NAME
2519 defined for reference from other files. */
2521 #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
2522 do { fputs ("\t.globl ", FILE); \
2523 RS6000_OUTPUT_BASENAME (FILE, NAME); fputs ("\n", FILE);} while (0)
2525 /* This is how to output a reference to a user-level label named NAME.
2526 `assemble_name' uses this. */
2528 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
2531 /* This is how to output an internal numbered label where
2532 PREFIX is the class of label and NUM is the number within the class. */
2534 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
2535 fprintf (FILE, "%s..%d:\n", PREFIX, NUM)
2537 /* This is how to output an internal label prefix. rs6000.c uses this
2538 when generating traceback tables. */
2540 #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
2541 fprintf (FILE, "%s..", PREFIX)
2543 /* This is how to output a label for a jump table. Arguments are the same as
2544 for ASM_OUTPUT_INTERNAL_LABEL, except the insn for the jump table is
2547 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \
2548 { ASM_OUTPUT_ALIGN (FILE, 2); ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); }
2550 /* This is how to store into the string LABEL
2551 the symbol_ref name of an internal numbered label where
2552 PREFIX is the class of label and NUM is the number within the class.
2553 This is suitable for output with `assemble_name'. */
2555 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
2556 sprintf (LABEL, "*%s..%d", PREFIX, NUM)
2558 /* This is how to output an assembler line defining a `double' constant. */
2560 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
2562 if (REAL_VALUE_ISINF (VALUE) \
2563 || REAL_VALUE_ISNAN (VALUE) \
2564 || REAL_VALUE_MINUS_ZERO (VALUE)) \
2567 REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \
2568 fprintf (FILE, "\t.long 0x%lx\n\t.long 0x%lx\n", \
2569 t[0] & 0xffffffff, t[1] & 0xffffffff); \
2574 REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", str); \
2575 fprintf (FILE, "\t.double 0d%s\n", str); \
2579 /* This is how to output an assembler line defining a `float' constant. */
2581 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
2583 if (REAL_VALUE_ISINF (VALUE) \
2584 || REAL_VALUE_ISNAN (VALUE) \
2585 || REAL_VALUE_MINUS_ZERO (VALUE)) \
2588 REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \
2589 fprintf (FILE, "\t.long 0x%lx\n", t & 0xffffffff); \
2594 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \
2595 fprintf (FILE, "\t.float 0d%s\n", str); \
2599 /* This is how to output an assembler line defining an `int' constant. */
2601 #define ASM_OUTPUT_DOUBLE_INT(FILE,VALUE) \
2605 assemble_integer (operand_subword ((VALUE), 0, 0, DImode), \
2606 UNITS_PER_WORD, 1); \
2607 assemble_integer (operand_subword ((VALUE), 1, 0, DImode), \
2608 UNITS_PER_WORD, 1); \
2612 fputs ("\t.llong ", FILE); \
2613 output_addr_const (FILE, (VALUE)); \
2614 putc ('\n', FILE); \
2618 #define ASM_OUTPUT_INT(FILE,VALUE) \
2619 ( fputs ("\t.long ", FILE), \
2620 output_addr_const (FILE, (VALUE)), \
2623 /* Likewise for `char' and `short' constants. */
2625 #define ASM_OUTPUT_SHORT(FILE,VALUE) \
2626 ( fputs ("\t.short ", FILE), \
2627 output_addr_const (FILE, (VALUE)), \
2630 #define ASM_OUTPUT_CHAR(FILE,VALUE) \
2631 ( fputs ("\t.byte ", FILE), \
2632 output_addr_const (FILE, (VALUE)), \
2635 /* This is how to output an assembler line for a numeric constant byte. */
2637 #define ASM_OUTPUT_BYTE(FILE,VALUE) \
2638 fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
2640 /* This is how to output an assembler line to define N characters starting
2643 #define ASM_OUTPUT_ASCII(FILE, P, N) output_ascii ((FILE), (P), (N))
2645 /* This is how to output code to push a register on the stack.
2646 It need not be very fast code. */
2648 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \
2650 extern char *reg_names[]; \
2651 asm_fprintf (FILE, "\{tstu|stwu} %s,-4(%s)\n", reg_names[REGNO], \
2655 /* This is how to output an insn to pop a register from the stack.
2656 It need not be very fast code. */
2658 #define ASM_OUTPUT_REG_POP(FILE,REGNO) \
2660 extern char *reg_names[]; \
2661 asm_fprintf (FILE, "\t{l|lwz} %s,0(%s)\n\t{ai|addic} %s,%s,4\n", \
2662 reg_names[REGNO], reg_names[1], reg_names[1], \
2666 /* This is how to output an element of a case-vector that is absolute.
2667 (RS/6000 does not use such vectors, but we must define this macro
2670 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
2671 do { char buf[100]; \
2672 fputs ((TARGET_32BIT) ? "\t.long " : "\t.llong ", FILE); \
2673 ASM_GENERATE_INTERNAL_LABEL (buf, "L", VALUE); \
2674 assemble_name (FILE, buf); \
2675 putc ('\n', FILE); \
2678 /* This is how to output an element of a case-vector that is relative. */
2680 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
2681 do { char buf[100]; \
2682 fputs ((TARGET_32BIT) ? "\t.long " : "\t.llong ", FILE); \
2683 ASM_GENERATE_INTERNAL_LABEL (buf, "L", VALUE); \
2684 assemble_name (FILE, buf); \
2686 ASM_GENERATE_INTERNAL_LABEL (buf, "L", REL); \
2687 assemble_name (FILE, buf); \
2688 putc ('\n', FILE); \
2691 /* This is how to output an assembler line
2692 that says to advance the location counter
2693 to a multiple of 2**LOG bytes. */
2695 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
2697 fprintf (FILE, "\t.align %d\n", (LOG))
2699 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
2700 fprintf (FILE, "\t.space %d\n", (SIZE))
2702 /* This says how to output an assembler line
2703 to define a global common symbol. */
2705 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGNMENT) \
2706 do { fputs (".comm ", (FILE)); \
2707 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
2709 fprintf ((FILE), ",%d,3\n", (SIZE)); \
2711 fprintf( (FILE), ",%d\n", (SIZE)); \
2714 /* This says how to output an assembler line
2715 to define a local common symbol. */
2717 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \
2718 do { fputs (".lcomm ", (FILE)); \
2719 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
2720 fprintf ((FILE), ",%d,%s\n", (SIZE), xcoff_bss_section_name); \
2723 /* Store in OUTPUT a string (made with alloca) containing
2724 an assembler-name for a local static variable named NAME.
2725 LABELNO is an integer which is different for each call. */
2727 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
2728 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
2729 sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
2731 /* Define the parentheses used to group arithmetic operations
2732 in assembler code. */
2734 #define ASM_OPEN_PAREN "("
2735 #define ASM_CLOSE_PAREN ")"
2737 /* Define results of standard character escape sequences. */
2738 #define TARGET_BELL 007
2739 #define TARGET_BS 010
2740 #define TARGET_TAB 011
2741 #define TARGET_NEWLINE 012
2742 #define TARGET_VT 013
2743 #define TARGET_FF 014
2744 #define TARGET_CR 015
2746 /* Print operand X (an rtx) in assembler syntax to file FILE.
2747 CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
2748 For `%' followed by punctuation, CODE is the punctuation and X is null. */
2750 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
2752 /* Define which CODE values are valid. */
2754 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '.' || (CODE) == '*')
2756 /* Print a memory address as an operand to reference that memory location. */
2758 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
2760 /* Define the codes that are matched by predicates in rs6000.c. */
2762 #define PREDICATE_CODES \
2763 {"short_cint_operand", {CONST_INT}}, \
2764 {"u_short_cint_operand", {CONST_INT}}, \
2765 {"non_short_cint_operand", {CONST_INT}}, \
2766 {"gpc_reg_operand", {SUBREG, REG}}, \
2767 {"cc_reg_operand", {SUBREG, REG}}, \
2768 {"reg_or_short_operand", {SUBREG, REG, CONST_INT}}, \
2769 {"reg_or_neg_short_operand", {SUBREG, REG, CONST_INT}}, \
2770 {"reg_or_u_short_operand", {SUBREG, REG, CONST_INT}}, \
2771 {"reg_or_cint_operand", {SUBREG, REG, CONST_INT}}, \
2772 {"easy_fp_constant", {CONST_DOUBLE}}, \
2773 {"reg_or_mem_operand", {SUBREG, MEM, REG}}, \
2774 {"lwa_operand", {SUBREG, MEM, REG}}, \
2775 {"volatile_mem_operand", {MEM}}, \
2776 {"offsettable_addr_operand", {REG, SUBREG, PLUS}}, \
2777 {"fp_reg_or_mem_operand", {SUBREG, MEM, REG}}, \
2778 {"mem_or_easy_const_operand", {SUBREG, MEM, CONST_DOUBLE}}, \
2779 {"add_operand", {SUBREG, REG, CONST_INT}}, \
2780 {"non_add_cint_operand", {CONST_INT}}, \
2781 {"and_operand", {SUBREG, REG, CONST_INT}}, \
2782 {"non_and_cint_operand", {CONST_INT}}, \
2783 {"logical_operand", {SUBREG, REG, CONST_INT}}, \
2784 {"non_logical_cint_operand", {CONST_INT}}, \
2785 {"mask_operand", {CONST_INT}}, \
2786 {"count_register_operand", {REG}}, \
2787 {"call_operand", {SYMBOL_REF, REG}}, \
2788 {"current_file_function_operand", {SYMBOL_REF}}, \
2789 {"input_operand", {SUBREG, MEM, REG, CONST_INT, SYMBOL_REF}}, \
2790 {"load_multiple_operation", {PARALLEL}}, \
2791 {"store_multiple_operation", {PARALLEL}}, \
2792 {"branch_comparison_operator", {EQ, NE, LE, LT, GE, \
2793 GT, LEU, LTU, GEU, GTU}}, \
2794 {"scc_comparison_operator", {EQ, NE, LE, LT, GE, \
2795 GT, LEU, LTU, GEU, GTU}},
2798 /* uncomment for disabling the corresponding default options */
2799 /* #define MACHINE_no_sched_interblock */
2800 /* #define MACHINE_no_sched_speculative */
2801 /* #define MACHINE_no_sched_speculative_load */
2803 /* indicate that issue rate is defined for this machine
2804 (no need to use the default) */
2805 #define MACHINE_issue_rate
2807 /* General optimization flags. */
2808 extern int optimize
;
2809 extern int flag_expensive_optimizations
;
2811 /* Declare functions in rs6000.c */
2812 extern void output_options ();
2813 extern void rs6000_override_options ();
2814 extern struct rtx_def
*rs6000_float_const ();
2815 extern struct rtx_def
*rs6000_immed_double_const ();
2816 extern int direct_return ();
2817 extern int any_operand ();
2818 extern int short_cint_operand ();
2819 extern int u_short_cint_operand ();
2820 extern int non_short_cint_operand ();
2821 extern int gpc_reg_operand ();
2822 extern int cc_reg_operand ();
2823 extern int reg_or_short_operand ();
2824 extern int reg_or_neg_short_operand ();
2825 extern int reg_or_u_short_operand ();
2826 extern int reg_or_cint_operand ();
2827 extern int num_insns_constant ();
2828 extern int easy_fp_constant ();
2829 extern int volatile_mem_operand ();
2830 extern int offsettable_addr_operand ();
2831 extern int fp_reg_or_mem_operand ();
2832 extern int mem_or_easy_const_operand ();
2833 extern int add_operand ();
2834 extern int non_add_cint_operand ();
2835 extern int logical_operand ();
2836 extern int non_logical_operand ();
2837 extern int mask_constant ();
2838 extern int mask_operand ();
2839 extern int and_operand ();
2840 extern int non_and_cint_operand ();
2841 extern int reg_or_mem_operand ();
2842 extern int lwa_operand ();
2843 extern int call_operand ();
2844 extern int current_file_function_operand ();
2845 extern int input_operand ();
2846 extern int small_data_operand ();
2847 extern void init_cumulative_args ();
2848 extern void function_arg_advance ();
2849 extern int function_arg_boundary ();
2850 extern struct rtx_def
*function_arg ();
2851 extern int function_arg_partial_nregs ();
2852 extern int function_arg_pass_by_reference ();
2853 extern void setup_incoming_varargs ();
2854 extern struct rtx_def
*expand_builtin_saveregs ();
2855 extern struct rtx_def
*rs6000_stack_temp ();
2856 extern int expand_block_move ();
2857 extern int load_multiple_operation ();
2858 extern int store_multiple_operation ();
2859 extern int branch_comparison_operator ();
2860 extern int scc_comparison_operator ();
2861 extern int includes_lshift_p ();
2862 extern int includes_rshift_p ();
2863 extern int registers_ok_for_quad_peep ();
2864 extern int addrs_ok_for_quad_peep ();
2865 extern enum reg_class
secondary_reload_class ();
2866 extern int ccr_bit ();
2867 extern void print_operand ();
2868 extern void print_operand_address ();
2869 extern int first_reg_to_save ();
2870 extern int first_fp_reg_to_save ();
2871 extern int rs6000_makes_calls ();
2872 extern rs6000_stack_t
*rs6000_stack_info ();
2873 extern void svr4_traceback ();
2874 extern void output_prolog ();
2875 extern void output_epilog ();
2876 extern void output_toc ();
2877 extern void output_ascii ();
2878 extern void rs6000_gen_section_name ();
2879 extern void output_function_profiler ();
2880 extern int rs6000_adjust_cost ();
2881 extern void rs6000_trampoline_template ();
2882 extern int rs6000_trampoline_size ();
2883 extern void rs6000_initialize_trampoline ();
2884 extern int rs6000_comp_type_attributes ();
2885 extern int rs6000_valid_decl_attribute_p ();
2886 extern int rs6000_valid_type_attribute_p ();
2887 extern void rs6000_set_default_type_attributes ();
2888 extern struct rtx_def
*rs6000_dll_import_ref ();
2889 extern struct rtx_def
*rs6000_longcall_ref ();