1 /* Definitions of target machine for GNU compiler, for IBM RS/6000.
2 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
5 Free Software Foundation, Inc.
6 Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify it
11 under the terms of the GNU General Public License as published
12 by the Free Software Foundation; either version 3, or (at your
13 option) any later version.
15 GCC is distributed in the hope that it will be useful, but WITHOUT
16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
17 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
18 License for more details.
20 Under Section 7 of GPL version 3, you are granted additional
21 permissions described in the GCC Runtime Library Exception, version
22 3.1, as published by the Free Software Foundation.
24 You should have received a copy of the GNU General Public License and
25 a copy of the GCC Runtime Library Exception along with this program;
26 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
27 <http://www.gnu.org/licenses/>. */
29 /* Note that some other tm.h files include this one and then override
30 many of the definitions. */
32 /* Definitions for the object file format. These are set at
35 #define OBJECT_XCOFF 1
38 #define OBJECT_MACHO 4
40 #define TARGET_ELF (TARGET_OBJECT_FORMAT == OBJECT_ELF)
41 #define TARGET_XCOFF (TARGET_OBJECT_FORMAT == OBJECT_XCOFF)
42 #define TARGET_MACOS (TARGET_OBJECT_FORMAT == OBJECT_PEF)
43 #define TARGET_MACHO (TARGET_OBJECT_FORMAT == OBJECT_MACHO)
50 #define TARGET_AIX_OS 0
53 /* Control whether function entry points use a "dot" symbol when
57 /* Default string to use for cpu if not specified. */
58 #ifndef TARGET_CPU_DEFAULT
59 #define TARGET_CPU_DEFAULT ((char *)0)
62 /* If configured for PPC405, support PPC405CR Erratum77. */
63 #ifdef CONFIG_PPC405CR
64 #define PPC405_ERRATUM77 (rs6000_cpu == PROCESSOR_PPC405)
66 #define PPC405_ERRATUM77 0
69 #ifndef TARGET_PAIRED_FLOAT
70 #define TARGET_PAIRED_FLOAT 0
73 #ifdef HAVE_AS_POPCNTB
74 #define ASM_CPU_POWER5_SPEC "-mpower5"
76 #define ASM_CPU_POWER5_SPEC "-mpower4"
80 #define ASM_CPU_POWER6_SPEC "-mpower6 -maltivec"
82 #define ASM_CPU_POWER6_SPEC "-mpower4 -maltivec"
85 #ifdef HAVE_AS_POPCNTD
86 #define ASM_CPU_POWER7_SPEC "-mpower7"
88 #define ASM_CPU_POWER7_SPEC "-mpower4 -maltivec"
92 #define ASM_CPU_476_SPEC "-m476"
94 #define ASM_CPU_476_SPEC "-mpower4"
97 /* Common ASM definitions used by ASM_SPEC among the various targets for
98 handling -mcpu=xxx switches. There is a parallel list in driver-rs6000.c to
99 provide the default assembler options if the user uses -mcpu=native, so if
100 you make changes here, make them also there. */
101 #define ASM_CPU_SPEC \
103 %{mpower: %{!mpower2: -mpwr}} \
105 %{mpowerpc64*: -mppc64} \
106 %{!mpowerpc64*: %{mpowerpc*: -mppc}} \
107 %{mno-power: %{!mpowerpc*: -mcom}} \
108 %{!mno-power: %{!mpower*: %(asm_default)}}} \
109 %{mcpu=native: %(asm_cpu_native)} \
110 %{mcpu=common: -mcom} \
111 %{mcpu=cell: -mcell} \
112 %{mcpu=power: -mpwr} \
113 %{mcpu=power2: -mpwrx} \
114 %{mcpu=power3: -mppc64} \
115 %{mcpu=power4: -mpower4} \
116 %{mcpu=power5: %(asm_cpu_power5)} \
117 %{mcpu=power5+: %(asm_cpu_power5)} \
118 %{mcpu=power6: %(asm_cpu_power6) -maltivec} \
119 %{mcpu=power6x: %(asm_cpu_power6) -maltivec} \
120 %{mcpu=power7: %(asm_cpu_power7)} \
122 %{mcpu=powerpc: -mppc} \
123 %{mcpu=rios: -mpwr} \
124 %{mcpu=rios1: -mpwr} \
125 %{mcpu=rios2: -mpwrx} \
127 %{mcpu=rsc1: -mpwr} \
128 %{mcpu=rs64a: -mppc64} \
132 %{mcpu=405fp: -m405} \
134 %{mcpu=440fp: -m440} \
136 %{mcpu=464fp: -m440} \
137 %{mcpu=476: %(asm_cpu_476)} \
138 %{mcpu=476fp: %(asm_cpu_476)} \
143 %{mcpu=603e: -mppc} \
144 %{mcpu=ec603e: -mppc} \
146 %{mcpu=604e: -mppc} \
147 %{mcpu=620: -mppc64} \
148 %{mcpu=630: -mppc64} \
152 %{mcpu=7400: -mppc -maltivec} \
153 %{mcpu=7450: -mppc -maltivec} \
154 %{mcpu=G4: -mppc -maltivec} \
159 %{mcpu=970: -mpower4 -maltivec} \
160 %{mcpu=G5: -mpower4 -maltivec} \
161 %{mcpu=8540: -me500} \
162 %{mcpu=8548: -me500} \
163 %{mcpu=e300c2: -me300} \
164 %{mcpu=e300c3: -me300} \
165 %{mcpu=e500mc: -me500mc} \
166 %{mcpu=e500mc64: -me500mc64} \
167 %{maltivec: -maltivec} \
168 %{mvsx: -mvsx %{!maltivec: -maltivec} %{!mcpu*: %(asm_cpu_power7)}} \
171 #define CPP_DEFAULT_SPEC ""
173 #define ASM_DEFAULT_SPEC ""
175 /* This macro defines names of additional specifications to put in the specs
176 that can be used in various specifications like CC1_SPEC. Its definition
177 is an initializer with a subgrouping for each command option.
179 Each subgrouping contains a string constant, that defines the
180 specification name, and a string constant that used by the GCC driver
183 Do not define this macro if it does not need to do anything. */
185 #define SUBTARGET_EXTRA_SPECS
187 #define EXTRA_SPECS \
188 { "cpp_default", CPP_DEFAULT_SPEC }, \
189 { "asm_cpu", ASM_CPU_SPEC }, \
190 { "asm_cpu_native", ASM_CPU_NATIVE_SPEC }, \
191 { "asm_default", ASM_DEFAULT_SPEC }, \
192 { "cc1_cpu", CC1_CPU_SPEC }, \
193 { "asm_cpu_power5", ASM_CPU_POWER5_SPEC }, \
194 { "asm_cpu_power6", ASM_CPU_POWER6_SPEC }, \
195 { "asm_cpu_power7", ASM_CPU_POWER7_SPEC }, \
196 { "asm_cpu_476", ASM_CPU_476_SPEC }, \
197 SUBTARGET_EXTRA_SPECS
199 /* -mcpu=native handling only makes sense with compiler running on
200 an PowerPC chip. If changing this condition, also change
201 the condition in driver-rs6000.c. */
202 #if defined(__powerpc__) || defined(__POWERPC__) || defined(_AIX)
203 /* In driver-rs6000.c. */
204 extern const char *host_detect_local_cpu (int argc, const char **argv);
205 #define EXTRA_SPEC_FUNCTIONS \
206 { "local_cpu_detect", host_detect_local_cpu },
207 #define HAVE_LOCAL_CPU_DETECT
208 #define ASM_CPU_NATIVE_SPEC "%:local_cpu_detect(asm)"
211 #define ASM_CPU_NATIVE_SPEC "%(asm_default)"
215 #ifdef HAVE_LOCAL_CPU_DETECT
216 #define CC1_CPU_SPEC \
217 "%{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)} \
218 %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
220 #define CC1_CPU_SPEC ""
224 /* Architecture type. */
226 /* Define TARGET_MFCRF if the target assembler does not support the
227 optional field operand for mfcr. */
229 #ifndef HAVE_AS_MFCRF
231 #define TARGET_MFCRF 0
234 /* Define TARGET_POPCNTB if the target assembler does not support the
235 popcount byte instruction. */
237 #ifndef HAVE_AS_POPCNTB
238 #undef TARGET_POPCNTB
239 #define TARGET_POPCNTB 0
242 /* Define TARGET_FPRND if the target assembler does not support the
243 fp rounding instructions. */
245 #ifndef HAVE_AS_FPRND
247 #define TARGET_FPRND 0
250 /* Define TARGET_CMPB if the target assembler does not support the
255 #define TARGET_CMPB 0
258 /* Define TARGET_MFPGPR if the target assembler does not support the
259 mffpr and mftgpr instructions. */
261 #ifndef HAVE_AS_MFPGPR
263 #define TARGET_MFPGPR 0
266 /* Define TARGET_DFP if the target assembler does not support decimal
267 floating point instructions. */
273 /* Define TARGET_POPCNTD if the target assembler does not support the
274 popcount word and double word instructions. */
276 #ifndef HAVE_AS_POPCNTD
277 #undef TARGET_POPCNTD
278 #define TARGET_POPCNTD 0
281 /* Define TARGET_LWSYNC_INSTRUCTION if the assembler knows about lwsync. If
282 not, generate the lwsync code as an integer constant. */
283 #ifdef HAVE_AS_LWSYNC
284 #define TARGET_LWSYNC_INSTRUCTION 1
286 #define TARGET_LWSYNC_INSTRUCTION 0
289 /* Define TARGET_TLS_MARKERS if the target assembler does not support
290 arg markers for __tls_get_addr calls. */
291 #ifndef HAVE_AS_TLS_MARKERS
292 #undef TARGET_TLS_MARKERS
293 #define TARGET_TLS_MARKERS 0
295 #define TARGET_TLS_MARKERS tls_markers
298 #ifndef TARGET_SECURE_PLT
299 #define TARGET_SECURE_PLT 0
302 /* Code model for 64-bit linux.
303 small: 16-bit toc offsets.
304 medium: 32-bit toc offsets, static data and code within 2G of TOC pointer.
305 large: 32-bit toc offsets, no limit on static data and code. */
312 #ifndef TARGET_CMODEL
313 #define TARGET_CMODEL CMODEL_SMALL
316 #define TARGET_32BIT (! TARGET_64BIT)
319 #define HAVE_AS_TLS 0
322 /* Return 1 for a symbol ref for a thread-local storage symbol. */
323 #define RS6000_SYMBOL_REF_TLS_P(RTX) \
324 (GET_CODE (RTX) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (RTX) != 0)
327 /* For libgcc2 we make sure this is a compile time constant */
328 #if defined (__64BIT__) || defined (__powerpc64__) || defined (__ppc64__)
329 #undef TARGET_POWERPC64
330 #define TARGET_POWERPC64 1
332 #undef TARGET_POWERPC64
333 #define TARGET_POWERPC64 0
336 /* The option machinery will define this. */
339 #define TARGET_DEFAULT (MASK_POWER | MASK_MULTIPLE | MASK_STRING)
341 /* Processor type. Order must match cpu attribute in MD file. */
365 PROCESSOR_PPCE500MC64,
375 /* FPU operations supported.
376 Each use of TARGET_SINGLE_FLOAT or TARGET_DOUBLE_FLOAT must
377 also test TARGET_HARD_FLOAT. */
378 #define TARGET_SINGLE_FLOAT 1
379 #define TARGET_DOUBLE_FLOAT 1
380 #define TARGET_SINGLE_FPU 0
381 #define TARGET_SIMPLE_FPU 0
382 #define TARGET_XILINX_FPU 0
384 extern enum processor_type rs6000_cpu;
386 /* Recast the processor type to the cpu attribute. */
387 #define rs6000_cpu_attr ((enum attr_cpu)rs6000_cpu)
389 /* Define generic processor types based upon current deployment. */
390 #define PROCESSOR_COMMON PROCESSOR_PPC601
391 #define PROCESSOR_POWER PROCESSOR_RIOS1
392 #define PROCESSOR_POWERPC PROCESSOR_PPC604
393 #define PROCESSOR_POWERPC64 PROCESSOR_RS64A
395 /* Define the default processor. This is overridden by other tm.h files. */
396 #define PROCESSOR_DEFAULT PROCESSOR_RIOS1
397 #define PROCESSOR_DEFAULT64 PROCESSOR_RS64A
399 /* FP processor type. */
402 FPU_NONE, /* No FPU */
403 FPU_SF_LITE, /* Limited Single Precision FPU */
404 FPU_DF_LITE, /* Limited Double Precision FPU */
405 FPU_SF_FULL, /* Full Single Precision FPU */
406 FPU_DF_FULL /* Full Double Single Precision FPU */
409 extern enum fpu_type_t fpu_type;
411 /* Specify the dialect of assembler to use. New mnemonics is dialect one
412 and the old mnemonics are dialect zero. */
413 #define ASSEMBLER_DIALECT (TARGET_NEW_MNEMONICS ? 1 : 0)
415 /* Types of costly dependences. */
416 enum rs6000_dependence_cost
418 max_dep_latency = 1000,
421 true_store_to_load_dep_costly,
422 store_to_load_dep_costly
425 /* Types of nop insertion schemes in sched target hook sched_finish. */
426 enum rs6000_nop_insertion
428 sched_finish_regroup_exact = 1000,
429 sched_finish_pad_groups,
433 /* Dispatch group termination caused by an insn. */
434 enum group_termination
440 /* rs6000_select[0] is reserved for the default cpu defined via --with-cpu */
441 struct rs6000_cpu_select
449 extern struct rs6000_cpu_select rs6000_select[];
452 extern const char *rs6000_debug_name; /* Name for -mdebug-xxxx option */
453 extern int rs6000_debug_stack; /* debug stack applications */
454 extern int rs6000_debug_arg; /* debug argument handling */
455 extern int rs6000_debug_reg; /* debug register handling */
456 extern int rs6000_debug_addr; /* debug memory addressing */
457 extern int rs6000_debug_cost; /* debug rtx_costs */
459 #define TARGET_DEBUG_STACK rs6000_debug_stack
460 #define TARGET_DEBUG_ARG rs6000_debug_arg
461 #define TARGET_DEBUG_REG rs6000_debug_reg
462 #define TARGET_DEBUG_ADDR rs6000_debug_addr
463 #define TARGET_DEBUG_COST rs6000_debug_cost
465 extern const char *rs6000_traceback_name; /* Type of traceback table. */
467 /* These are separate from target_flags because we've run out of bits
469 extern int rs6000_long_double_type_size;
470 extern int rs6000_ieeequad;
471 extern int rs6000_altivec_abi;
472 extern int rs6000_spe_abi;
473 extern int rs6000_spe;
474 extern int rs6000_float_gprs;
475 extern int rs6000_alignment_flags;
476 extern const char *rs6000_sched_insert_nops_str;
477 extern enum rs6000_nop_insertion rs6000_sched_insert_nops;
479 /* Describe which vector unit to use for a given machine mode. */
481 VECTOR_NONE, /* Type is not a vector or not supported */
482 VECTOR_ALTIVEC, /* Use altivec for vector processing */
483 VECTOR_VSX, /* Use VSX for vector processing */
484 VECTOR_PAIRED, /* Use paired floating point for vectors */
485 VECTOR_SPE, /* Use SPE for vector processing */
486 VECTOR_OTHER /* Some other vector unit */
489 extern enum rs6000_vector rs6000_vector_unit[];
491 #define VECTOR_UNIT_NONE_P(MODE) \
492 (rs6000_vector_unit[(MODE)] == VECTOR_NONE)
494 #define VECTOR_UNIT_VSX_P(MODE) \
495 (rs6000_vector_unit[(MODE)] == VECTOR_VSX)
497 #define VECTOR_UNIT_ALTIVEC_P(MODE) \
498 (rs6000_vector_unit[(MODE)] == VECTOR_ALTIVEC)
500 #define VECTOR_UNIT_ALTIVEC_OR_VSX_P(MODE) \
501 (rs6000_vector_unit[(MODE)] == VECTOR_ALTIVEC \
502 || rs6000_vector_unit[(MODE)] == VECTOR_VSX)
504 /* Describe whether to use VSX loads or Altivec loads. For now, just use the
505 same unit as the vector unit we are using, but we may want to migrate to
506 using VSX style loads even for types handled by altivec. */
507 extern enum rs6000_vector rs6000_vector_mem[];
509 #define VECTOR_MEM_NONE_P(MODE) \
510 (rs6000_vector_mem[(MODE)] == VECTOR_NONE)
512 #define VECTOR_MEM_VSX_P(MODE) \
513 (rs6000_vector_mem[(MODE)] == VECTOR_VSX)
515 #define VECTOR_MEM_ALTIVEC_P(MODE) \
516 (rs6000_vector_mem[(MODE)] == VECTOR_ALTIVEC)
518 #define VECTOR_MEM_ALTIVEC_OR_VSX_P(MODE) \
519 (rs6000_vector_mem[(MODE)] == VECTOR_ALTIVEC \
520 || rs6000_vector_mem[(MODE)] == VECTOR_VSX)
522 /* Return the alignment of a given vector type, which is set based on the
523 vector unit use. VSX for instance can load 32 or 64 bit aligned words
524 without problems, while Altivec requires 128-bit aligned vectors. */
525 extern int rs6000_vector_align[];
527 #define VECTOR_ALIGN(MODE) \
528 ((rs6000_vector_align[(MODE)] != 0) \
529 ? rs6000_vector_align[(MODE)] \
530 : (int)GET_MODE_BITSIZE ((MODE)))
532 /* Alignment options for fields in structures for sub-targets following
534 ALIGN_POWER word-aligns FP doubles (default AIX ABI).
535 ALIGN_NATURAL doubleword-aligns FP doubles (align to object size).
537 Override the macro definitions when compiling libobjc to avoid undefined
538 reference to rs6000_alignment_flags due to library's use of GCC alignment
539 macros which use the macros below. */
541 #ifndef IN_TARGET_LIBS
542 #define MASK_ALIGN_POWER 0x00000000
543 #define MASK_ALIGN_NATURAL 0x00000001
544 #define TARGET_ALIGN_NATURAL (rs6000_alignment_flags & MASK_ALIGN_NATURAL)
546 #define TARGET_ALIGN_NATURAL 0
549 #define TARGET_LONG_DOUBLE_128 (rs6000_long_double_type_size == 128)
550 #define TARGET_IEEEQUAD rs6000_ieeequad
551 #define TARGET_ALTIVEC_ABI rs6000_altivec_abi
552 #define TARGET_LDBRX (TARGET_POPCNTD || rs6000_cpu == PROCESSOR_CELL)
554 #define TARGET_SPE_ABI 0
556 #define TARGET_E500 0
557 #define TARGET_ISEL64 (TARGET_ISEL && TARGET_POWERPC64)
558 #define TARGET_FPRS 1
559 #define TARGET_E500_SINGLE 0
560 #define TARGET_E500_DOUBLE 0
561 #define CHECK_E500_OPTIONS do { } while (0)
563 /* ISA 2.01 allowed FCFID to be done in 32-bit, previously it was 64-bit only.
564 Enable 32-bit fcfid's on any of the switches for newer ISA machines or
566 #define TARGET_FCFID (TARGET_POWERPC64 \
567 || TARGET_POPCNTB /* ISA 2.02 */ \
568 || TARGET_CMPB /* ISA 2.05 */ \
569 || TARGET_POPCNTD /* ISA 2.06 */ \
570 || TARGET_XILINX_FPU)
572 #define TARGET_FCTIDZ TARGET_FCFID
573 #define TARGET_STFIWX TARGET_PPC_GFXOPT
574 #define TARGET_LFIWAX TARGET_CMPB
575 #define TARGET_LFIWZX TARGET_POPCNTD
576 #define TARGET_FCFIDS TARGET_POPCNTD
577 #define TARGET_FCFIDU TARGET_POPCNTD
578 #define TARGET_FCFIDUS TARGET_POPCNTD
579 #define TARGET_FCTIDUZ TARGET_POPCNTD
580 #define TARGET_FCTIWUZ TARGET_POPCNTD
582 /* E500 processors only support plain "sync", not lwsync. */
583 #define TARGET_NO_LWSYNC TARGET_E500
585 /* Which machine supports the various reciprocal estimate instructions. */
586 #define TARGET_FRES (TARGET_HARD_FLOAT && TARGET_PPC_GFXOPT \
587 && TARGET_FPRS && TARGET_SINGLE_FLOAT)
589 #define TARGET_FRE (TARGET_HARD_FLOAT && TARGET_FPRS \
590 && TARGET_DOUBLE_FLOAT \
591 && (TARGET_POPCNTB || VECTOR_UNIT_VSX_P (DFmode)))
593 #define TARGET_FRSQRTES (TARGET_HARD_FLOAT && TARGET_POPCNTB \
594 && TARGET_FPRS && TARGET_SINGLE_FLOAT)
596 #define TARGET_FRSQRTE (TARGET_HARD_FLOAT && TARGET_FPRS \
597 && TARGET_DOUBLE_FLOAT \
598 && (TARGET_PPC_GFXOPT || VECTOR_UNIT_VSX_P (DFmode)))
600 /* Whether the various reciprocal divide/square root estimate instructions
601 exist, and whether we should automatically generate code for the instruction
603 #define RS6000_RECIP_MASK_HAVE_RE 0x1 /* have RE instruction. */
604 #define RS6000_RECIP_MASK_AUTO_RE 0x2 /* generate RE by default. */
605 #define RS6000_RECIP_MASK_HAVE_RSQRTE 0x4 /* have RSQRTE instruction. */
606 #define RS6000_RECIP_MASK_AUTO_RSQRTE 0x8 /* gen. RSQRTE by default. */
608 extern unsigned char rs6000_recip_bits[];
610 #define RS6000_RECIP_HAVE_RE_P(MODE) \
611 (rs6000_recip_bits[(int)(MODE)] & RS6000_RECIP_MASK_HAVE_RE)
613 #define RS6000_RECIP_AUTO_RE_P(MODE) \
614 (rs6000_recip_bits[(int)(MODE)] & RS6000_RECIP_MASK_AUTO_RE)
616 #define RS6000_RECIP_HAVE_RSQRTE_P(MODE) \
617 (rs6000_recip_bits[(int)(MODE)] & RS6000_RECIP_MASK_HAVE_RSQRTE)
619 #define RS6000_RECIP_AUTO_RSQRTE_P(MODE) \
620 (rs6000_recip_bits[(int)(MODE)] & RS6000_RECIP_MASK_AUTO_RSQRTE)
622 #define RS6000_RECIP_HIGH_PRECISION_P(MODE) \
623 ((MODE) == SFmode || (MODE) == V4SFmode || TARGET_RECIP_PRECISION)
625 /* The default CPU for TARGET_OPTION_OVERRIDE. */
626 #define OPTION_TARGET_CPU_DEFAULT TARGET_CPU_DEFAULT
629 #define REGISTER_TARGET_PRAGMAS() do { \
630 c_register_pragma (0, "longcall", rs6000_pragma_longcall); \
631 targetm.resolve_overloaded_builtin = altivec_resolve_overloaded_builtin; \
634 /* Target #defines. */
635 #define TARGET_CPU_CPP_BUILTINS() \
636 rs6000_cpu_cpp_builtins (pfile)
638 /* This is used by rs6000_cpu_cpp_builtins to indicate the byte order
639 we're compiling for. Some configurations may need to override it. */
640 #define RS6000_CPU_CPP_ENDIAN_BUILTINS() \
643 if (BYTES_BIG_ENDIAN) \
645 builtin_define ("__BIG_ENDIAN__"); \
646 builtin_define ("_BIG_ENDIAN"); \
647 builtin_assert ("machine=bigendian"); \
651 builtin_define ("__LITTLE_ENDIAN__"); \
652 builtin_define ("_LITTLE_ENDIAN"); \
653 builtin_assert ("machine=littleendian"); \
658 /* Target machine storage layout. */
660 /* Define this macro if it is advisable to hold scalars in registers
661 in a wider mode than that declared by the program. In such cases,
662 the value is constrained to be within the bounds of the declared
663 type, but kept valid in the wider mode. The signedness of the
664 extension may differ from that of the type. */
666 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
667 if (GET_MODE_CLASS (MODE) == MODE_INT \
668 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
669 (MODE) = TARGET_32BIT ? SImode : DImode;
671 /* Define this if most significant bit is lowest numbered
672 in instructions that operate on numbered bit-fields. */
673 /* That is true on RS/6000. */
674 #define BITS_BIG_ENDIAN 1
676 /* Define this if most significant byte of a word is the lowest numbered. */
677 /* That is true on RS/6000. */
678 #define BYTES_BIG_ENDIAN 1
680 /* Define this if most significant word of a multiword number is lowest
683 For RS/6000 we can decide arbitrarily since there are no machine
684 instructions for them. Might as well be consistent with bits and bytes. */
685 #define WORDS_BIG_ENDIAN 1
687 #define MAX_BITS_PER_WORD 64
689 /* Width of a word, in units (bytes). */
690 #define UNITS_PER_WORD (! TARGET_POWERPC64 ? 4 : 8)
692 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
694 #define MIN_UNITS_PER_WORD 4
696 #define UNITS_PER_FP_WORD 8
697 #define UNITS_PER_ALTIVEC_WORD 16
698 #define UNITS_PER_VSX_WORD 16
699 #define UNITS_PER_SPE_WORD 8
700 #define UNITS_PER_PAIRED_WORD 8
702 /* Type used for ptrdiff_t, as a string used in a declaration. */
703 #define PTRDIFF_TYPE "int"
705 /* Type used for size_t, as a string used in a declaration. */
706 #define SIZE_TYPE "long unsigned int"
708 /* Type used for wchar_t, as a string used in a declaration. */
709 #define WCHAR_TYPE "short unsigned int"
711 /* Width of wchar_t in bits. */
712 #define WCHAR_TYPE_SIZE 16
714 /* A C expression for the size in bits of the type `short' on the
715 target machine. If you don't define this, the default is half a
716 word. (If this would be less than one storage unit, it is
717 rounded up to one unit.) */
718 #define SHORT_TYPE_SIZE 16
720 /* A C expression for the size in bits of the type `int' on the
721 target machine. If you don't define this, the default is one
723 #define INT_TYPE_SIZE 32
725 /* A C expression for the size in bits of the type `long' on the
726 target machine. If you don't define this, the default is one
728 #define LONG_TYPE_SIZE (TARGET_32BIT ? 32 : 64)
730 /* A C expression for the size in bits of the type `long long' on the
731 target machine. If you don't define this, the default is two
733 #define LONG_LONG_TYPE_SIZE 64
735 /* A C expression for the size in bits of the type `float' on the
736 target machine. If you don't define this, the default is one
738 #define FLOAT_TYPE_SIZE 32
740 /* A C expression for the size in bits of the type `double' on the
741 target machine. If you don't define this, the default is two
743 #define DOUBLE_TYPE_SIZE 64
745 /* A C expression for the size in bits of the type `long double' on
746 the target machine. If you don't define this, the default is two
748 #define LONG_DOUBLE_TYPE_SIZE rs6000_long_double_type_size
750 /* Define this to set long double type size to use in libgcc2.c, which can
751 not depend on target_flags. */
752 #ifdef __LONG_DOUBLE_128__
753 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
755 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
758 /* Work around rs6000_long_double_type_size dependency in ada/targtyps.c. */
759 #define WIDEST_HARDWARE_FP_SIZE 64
761 /* Width in bits of a pointer.
762 See also the macro `Pmode' defined below. */
763 extern unsigned rs6000_pointer_size;
764 #define POINTER_SIZE rs6000_pointer_size
766 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
767 #define PARM_BOUNDARY (TARGET_32BIT ? 32 : 64)
769 /* Boundary (in *bits*) on which stack pointer should be aligned. */
770 #define STACK_BOUNDARY \
771 ((TARGET_32BIT && !TARGET_ALTIVEC && !TARGET_ALTIVEC_ABI && !TARGET_VSX) \
774 /* Allocation boundary (in *bits*) for the code of a function. */
775 #define FUNCTION_BOUNDARY 32
777 /* No data type wants to be aligned rounder than this. */
778 #define BIGGEST_ALIGNMENT 128
780 /* A C expression to compute the alignment for a variables in the
781 local store. TYPE is the data type, and ALIGN is the alignment
782 that the object would ordinarily have. */
783 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \
784 DATA_ALIGNMENT (TYPE, ALIGN)
786 /* Alignment of field after `int : 0' in a structure. */
787 #define EMPTY_FIELD_BOUNDARY 32
789 /* Every structure's size must be a multiple of this. */
790 #define STRUCTURE_SIZE_BOUNDARY 8
792 /* Return 1 if a structure or array containing FIELD should be
793 accessed using `BLKMODE'.
795 For the SPE, simd types are V2SI, and gcc can be tempted to put the
796 entire thing in a DI and use subregs to access the internals.
797 store_bit_field() will force (subreg:DI (reg:V2SI x))'s to the
798 back-end. Because a single GPR can hold a V2SI, but not a DI, the
799 best thing to do is set structs to BLKmode and avoid Severe Tire
802 On e500 v2, DF and DI modes suffer from the same anomaly. DF can
803 fit into 1, whereas DI still needs two. */
804 #define MEMBER_TYPE_FORCES_BLK(FIELD, MODE) \
805 ((TARGET_SPE && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE) \
806 || (TARGET_E500_DOUBLE && (MODE) == DFmode))
808 /* A bit-field declared as `int' forces `int' alignment for the struct. */
809 #define PCC_BITFIELD_TYPE_MATTERS 1
811 /* Make strings word-aligned so strcpy from constants will be faster.
812 Make vector constants quadword aligned. */
813 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
814 (TREE_CODE (EXP) == STRING_CST \
815 && (STRICT_ALIGNMENT || !optimize_size) \
816 && (ALIGN) < BITS_PER_WORD \
820 /* Make arrays of chars word-aligned for the same reasons.
821 Align vectors to 128 bits. Align SPE vectors and E500 v2 doubles to
823 #define DATA_ALIGNMENT(TYPE, ALIGN) \
824 (TREE_CODE (TYPE) == VECTOR_TYPE \
825 ? (((TARGET_SPE && SPE_VECTOR_MODE (TYPE_MODE (TYPE))) \
826 || (TARGET_PAIRED_FLOAT && PAIRED_VECTOR_MODE (TYPE_MODE (TYPE)))) \
828 : ((TARGET_E500_DOUBLE \
829 && TREE_CODE (TYPE) == REAL_TYPE \
830 && TYPE_MODE (TYPE) == DFmode) \
832 : (TREE_CODE (TYPE) == ARRAY_TYPE \
833 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
834 && (ALIGN) < BITS_PER_WORD) ? BITS_PER_WORD : (ALIGN)))
836 /* Nonzero if move instructions will actually fail to work
837 when given unaligned data. */
838 #define STRICT_ALIGNMENT 0
840 /* Define this macro to be the value 1 if unaligned accesses have a cost
841 many times greater than aligned accesses, for example if they are
842 emulated in a trap handler. */
843 /* Altivec vector memory instructions simply ignore the low bits; SPE vector
844 memory instructions trap on unaligned accesses; VSX memory instructions are
845 aligned to 4 or 8 bytes. */
846 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) \
848 || (((MODE) == SFmode || (MODE) == DFmode || (MODE) == TFmode \
849 || (MODE) == SDmode || (MODE) == DDmode || (MODE) == TDmode \
850 || (MODE) == DImode) \
852 || (VECTOR_MODE_P ((MODE)) && (((int)(ALIGN)) < VECTOR_ALIGN (MODE))))
855 /* Standard register usage. */
857 /* Number of actual hardware registers.
858 The hardware registers are assigned numbers for the compiler
859 from 0 to just below FIRST_PSEUDO_REGISTER.
860 All registers that the compiler knows about must be given numbers,
861 even those that are not normally considered general registers.
863 RS/6000 has 32 fixed-point registers, 32 floating-point registers,
864 an MQ register, a count register, a link register, and 8 condition
865 register fields, which we view here as separate registers. AltiVec
866 adds 32 vector registers and a VRsave register.
868 In addition, the difference between the frame and argument pointers is
869 a function of the number of registers saved, so we need to have a
870 register for AP that will later be eliminated in favor of SP or FP.
871 This is a normal register, but it is fixed.
873 We also create a pseudo register for float/int conversions, that will
874 really represent the memory location used. It is represented here as
875 a register, in order to work around problems in allocating stack storage
878 Another pseudo (not included in DWARF_FRAME_REGISTERS) is soft frame
879 pointer, which is eventually eliminated in favor of SP or FP. */
881 #define FIRST_PSEUDO_REGISTER 114
883 /* This must be included for pre gcc 3.0 glibc compatibility. */
884 #define PRE_GCC3_DWARF_FRAME_REGISTERS 77
886 /* Add 32 dwarf columns for synthetic SPE registers. */
887 #define DWARF_FRAME_REGISTERS ((FIRST_PSEUDO_REGISTER - 1) + 32)
889 /* The SPE has an additional 32 synthetic registers, with DWARF debug
890 info numbering for these registers starting at 1200. While eh_frame
891 register numbering need not be the same as the debug info numbering,
892 we choose to number these regs for eh_frame at 1200 too. This allows
893 future versions of the rs6000 backend to add hard registers and
894 continue to use the gcc hard register numbering for eh_frame. If the
895 extra SPE registers in eh_frame were numbered starting from the
896 current value of FIRST_PSEUDO_REGISTER, then if FIRST_PSEUDO_REGISTER
897 changed we'd need to introduce a mapping in DWARF_FRAME_REGNUM to
898 avoid invalidating older SPE eh_frame info.
900 We must map them here to avoid huge unwinder tables mostly consisting
902 #define DWARF_REG_TO_UNWIND_COLUMN(r) \
903 ((r) > 1200 ? ((r) - 1200 + FIRST_PSEUDO_REGISTER - 1) : (r))
905 /* Use standard DWARF numbering for DWARF debugging information. */
906 #define DBX_REGISTER_NUMBER(REGNO) rs6000_dbx_register_number (REGNO)
908 /* Use gcc hard register numbering for eh_frame. */
909 #define DWARF_FRAME_REGNUM(REGNO) (REGNO)
911 /* Map register numbers held in the call frame info that gcc has
912 collected using DWARF_FRAME_REGNUM to those that should be output in
913 .debug_frame and .eh_frame. We continue to use gcc hard reg numbers
914 for .eh_frame, but use the numbers mandated by the various ABIs for
915 .debug_frame. rs6000_emit_prologue has translated any combination of
916 CR2, CR3, CR4 saves to a save of CR2. The actual code emitted saves
917 the whole of CR, so we map CR2_REGNO to the DWARF reg for CR. */
918 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) \
919 ((FOR_EH) ? (REGNO) \
920 : (REGNO) == CR2_REGNO ? 64 \
921 : DBX_REGISTER_NUMBER (REGNO))
923 /* 1 for registers that have pervasive standard uses
924 and are not available for the register allocator.
926 On RS/6000, r1 is used for the stack. On Darwin, r2 is available
927 as a local register; for all other OS's r2 is the TOC pointer.
929 cr5 is not supposed to be used.
931 On System V implementations, r13 is fixed and not available for use. */
933 #define FIXED_REGISTERS \
934 {0, 1, FIXED_R2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, FIXED_R13, 0, 0, \
935 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
936 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
937 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
938 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, \
939 /* AltiVec registers. */ \
940 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
941 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
946 /* 1 for registers not available across function calls.
947 These must include the FIXED_REGISTERS and also any
948 registers that can be used without being saved.
949 The latter must include the registers where values are returned
950 and the register where structure-value addresses are passed.
951 Aside from that, you can include as many other registers as you like. */
953 #define CALL_USED_REGISTERS \
954 {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, FIXED_R13, 0, 0, \
955 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
956 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, \
957 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
958 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, \
959 /* AltiVec registers. */ \
960 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
961 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
966 /* Like `CALL_USED_REGISTERS' except this macro doesn't require that
967 the entire set of `FIXED_REGISTERS' be included.
968 (`CALL_USED_REGISTERS' must be a superset of `FIXED_REGISTERS').
969 This macro is optional. If not specified, it defaults to the value
970 of `CALL_USED_REGISTERS'. */
972 #define CALL_REALLY_USED_REGISTERS \
973 {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, FIXED_R13, 0, 0, \
974 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
975 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, \
976 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
977 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, \
978 /* AltiVec registers. */ \
979 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
980 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
985 #define TOTAL_ALTIVEC_REGS (LAST_ALTIVEC_REGNO - FIRST_ALTIVEC_REGNO + 1)
987 #define FIRST_SAVED_ALTIVEC_REGNO (FIRST_ALTIVEC_REGNO+20)
988 #define FIRST_SAVED_FP_REGNO (14+32)
989 #define FIRST_SAVED_GP_REGNO 13
991 /* List the order in which to allocate registers. Each register must be
992 listed once, even those in FIXED_REGISTERS.
994 We allocate in the following order:
995 fp0 (not saved or used for anything)
996 fp13 - fp2 (not saved; incoming fp arg registers)
997 fp1 (not saved; return value)
998 fp31 - fp14 (saved; order given to save least number)
999 cr7, cr6 (not saved or special)
1000 cr1 (not saved, but used for FP operations)
1001 cr0 (not saved, but used for arithmetic operations)
1002 cr4, cr3, cr2 (saved)
1003 r0 (not saved; cannot be base reg)
1004 r9 (not saved; best for TImode)
1005 r11, r10, r8-r4 (not saved; highest used first to make less conflict)
1006 r3 (not saved; return value register)
1007 r31 - r13 (saved; order given to save least number)
1008 r12 (not saved; if used for DImode or DFmode would use r13)
1009 mq (not saved; best to use it if we can)
1010 ctr (not saved; when we have the choice ctr is better)
1012 cr5, r1, r2, ap, ca (fixed)
1013 v0 - v1 (not saved or used for anything)
1014 v13 - v3 (not saved; incoming vector arg registers)
1015 v2 (not saved; incoming vector arg reg; return value)
1016 v19 - v14 (not saved or used for anything)
1017 v31 - v20 (saved; order given to save least number)
1018 vrsave, vscr (fixed)
1019 spe_acc, spefscr (fixed)
1024 #define MAYBE_R2_AVAILABLE
1025 #define MAYBE_R2_FIXED 2,
1027 #define MAYBE_R2_AVAILABLE 2,
1028 #define MAYBE_R2_FIXED
1031 #define REG_ALLOC_ORDER \
1033 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, \
1035 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, \
1036 50, 49, 48, 47, 46, \
1037 75, 74, 69, 68, 72, 71, 70, \
1038 0, MAYBE_R2_AVAILABLE \
1039 9, 11, 10, 8, 7, 6, 5, 4, \
1041 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, \
1042 18, 17, 16, 15, 14, 13, 12, \
1044 73, 1, MAYBE_R2_FIXED 67, 76, \
1045 /* AltiVec registers. */ \
1047 90, 89, 88, 87, 86, 85, 84, 83, 82, 81, 80, \
1049 96, 95, 94, 93, 92, 91, \
1050 108, 107, 106, 105, 104, 103, 102, 101, 100, 99, 98, 97, \
1055 /* True if register is floating-point. */
1056 #define FP_REGNO_P(N) ((N) >= 32 && (N) <= 63)
1058 /* True if register is a condition register. */
1059 #define CR_REGNO_P(N) ((N) >= CR0_REGNO && (N) <= CR7_REGNO)
1061 /* True if register is a condition register, but not cr0. */
1062 #define CR_REGNO_NOT_CR0_P(N) ((N) >= CR1_REGNO && (N) <= CR7_REGNO)
1064 /* True if register is an integer register. */
1065 #define INT_REGNO_P(N) \
1066 ((N) <= 31 || (N) == ARG_POINTER_REGNUM || (N) == FRAME_POINTER_REGNUM)
1068 /* SPE SIMD registers are just the GPRs. */
1069 #define SPE_SIMD_REGNO_P(N) ((N) <= 31)
1071 /* PAIRED SIMD registers are just the FPRs. */
1072 #define PAIRED_SIMD_REGNO_P(N) ((N) >= 32 && (N) <= 63)
1074 /* True if register is the CA register. */
1075 #define CA_REGNO_P(N) ((N) == CA_REGNO)
1077 /* True if register is an AltiVec register. */
1078 #define ALTIVEC_REGNO_P(N) ((N) >= FIRST_ALTIVEC_REGNO && (N) <= LAST_ALTIVEC_REGNO)
1080 /* True if register is a VSX register. */
1081 #define VSX_REGNO_P(N) (FP_REGNO_P (N) || ALTIVEC_REGNO_P (N))
1083 /* Alternate name for any vector register supporting floating point, no matter
1084 which instruction set(s) are available. */
1085 #define VFLOAT_REGNO_P(N) \
1086 (ALTIVEC_REGNO_P (N) || (TARGET_VSX && FP_REGNO_P (N)))
1088 /* Alternate name for any vector register supporting integer, no matter which
1089 instruction set(s) are available. */
1090 #define VINT_REGNO_P(N) ALTIVEC_REGNO_P (N)
1092 /* Alternate name for any vector register supporting logical operations, no
1093 matter which instruction set(s) are available. */
1094 #define VLOGICAL_REGNO_P(N) VFLOAT_REGNO_P (N)
1096 /* Return number of consecutive hard regs needed starting at reg REGNO
1097 to hold something of mode MODE. */
1099 #define HARD_REGNO_NREGS(REGNO, MODE) rs6000_hard_regno_nregs[(MODE)][(REGNO)]
1101 #define HARD_REGNO_CALL_PART_CLOBBERED(REGNO, MODE) \
1102 (((TARGET_32BIT && TARGET_POWERPC64 \
1103 && (GET_MODE_SIZE (MODE) > 4) \
1104 && INT_REGNO_P (REGNO)) ? 1 : 0) \
1105 || (TARGET_VSX && FP_REGNO_P (REGNO) \
1106 && GET_MODE_SIZE (MODE) > 8))
1108 #define VSX_VECTOR_MODE(MODE) \
1109 ((MODE) == V4SFmode \
1110 || (MODE) == V2DFmode) \
1112 #define VSX_SCALAR_MODE(MODE) \
1115 #define VSX_MODE(MODE) \
1116 (VSX_VECTOR_MODE (MODE) \
1117 || VSX_SCALAR_MODE (MODE))
1119 #define VSX_MOVE_MODE(MODE) \
1120 (VSX_VECTOR_MODE (MODE) \
1121 || VSX_SCALAR_MODE (MODE) \
1122 || ALTIVEC_VECTOR_MODE (MODE) \
1123 || (MODE) == TImode)
1125 #define ALTIVEC_VECTOR_MODE(MODE) \
1126 ((MODE) == V16QImode \
1127 || (MODE) == V8HImode \
1128 || (MODE) == V4SFmode \
1129 || (MODE) == V4SImode)
1131 #define SPE_VECTOR_MODE(MODE) \
1132 ((MODE) == V4HImode \
1133 || (MODE) == V2SFmode \
1134 || (MODE) == V1DImode \
1135 || (MODE) == V2SImode)
1137 #define PAIRED_VECTOR_MODE(MODE) \
1138 ((MODE) == V2SFmode)
1140 /* Value is TRUE if hard register REGNO can hold a value of
1141 machine-mode MODE. */
1142 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
1143 rs6000_hard_regno_mode_ok_p[(int)(MODE)][REGNO]
1145 /* Value is 1 if it is a good idea to tie two pseudo registers
1146 when one has mode MODE1 and one has mode MODE2.
1147 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
1148 for any hard reg, then this must be 0 for correct output. */
1149 #define MODES_TIEABLE_P(MODE1, MODE2) \
1150 (SCALAR_FLOAT_MODE_P (MODE1) \
1151 ? SCALAR_FLOAT_MODE_P (MODE2) \
1152 : SCALAR_FLOAT_MODE_P (MODE2) \
1153 ? SCALAR_FLOAT_MODE_P (MODE1) \
1154 : GET_MODE_CLASS (MODE1) == MODE_CC \
1155 ? GET_MODE_CLASS (MODE2) == MODE_CC \
1156 : GET_MODE_CLASS (MODE2) == MODE_CC \
1157 ? GET_MODE_CLASS (MODE1) == MODE_CC \
1158 : SPE_VECTOR_MODE (MODE1) \
1159 ? SPE_VECTOR_MODE (MODE2) \
1160 : SPE_VECTOR_MODE (MODE2) \
1161 ? SPE_VECTOR_MODE (MODE1) \
1162 : ALTIVEC_VECTOR_MODE (MODE1) \
1163 ? ALTIVEC_VECTOR_MODE (MODE2) \
1164 : ALTIVEC_VECTOR_MODE (MODE2) \
1165 ? ALTIVEC_VECTOR_MODE (MODE1) \
1166 : VSX_VECTOR_MODE (MODE1) \
1167 ? VSX_VECTOR_MODE (MODE2) \
1168 : VSX_VECTOR_MODE (MODE2) \
1169 ? VSX_VECTOR_MODE (MODE1) \
1172 /* Post-reload, we can't use any new AltiVec registers, as we already
1173 emitted the vrsave mask. */
1175 #define HARD_REGNO_RENAME_OK(SRC, DST) \
1176 (! ALTIVEC_REGNO_P (DST) || df_regs_ever_live_p (DST))
1178 /* Specify the cost of a branch insn; roughly the number of extra insns that
1179 should be added to avoid a branch.
1181 Set this to 3 on the RS/6000 since that is roughly the average cost of an
1182 unscheduled conditional branch. */
1184 #define BRANCH_COST(speed_p, predictable_p) 3
1186 /* Override BRANCH_COST heuristic which empirically produces worse
1187 performance for removing short circuiting from the logical ops. */
1189 #define LOGICAL_OP_NON_SHORT_CIRCUIT 0
1191 /* A fixed register used at epilogue generation to address SPE registers
1192 with negative offsets. The 64-bit load/store instructions on the SPE
1193 only take positive offsets (and small ones at that), so we need to
1194 reserve a register for consing up negative offsets. */
1196 #define FIXED_SCRATCH 0
1198 /* Define this macro to change register usage conditional on target
1201 #define CONDITIONAL_REGISTER_USAGE rs6000_conditional_register_usage ()
1203 /* Specify the registers used for certain standard purposes.
1204 The values of these macros are register numbers. */
1206 /* RS/6000 pc isn't overloaded on a register that the compiler knows about. */
1207 /* #define PC_REGNUM */
1209 /* Register to use for pushing function arguments. */
1210 #define STACK_POINTER_REGNUM 1
1212 /* Base register for access to local variables of the function. */
1213 #define HARD_FRAME_POINTER_REGNUM 31
1215 /* Base register for access to local variables of the function. */
1216 #define FRAME_POINTER_REGNUM 113
1218 /* Base register for access to arguments of the function. */
1219 #define ARG_POINTER_REGNUM 67
1221 /* Place to put static chain when calling a function that requires it. */
1222 #define STATIC_CHAIN_REGNUM 11
1225 /* Define the classes of registers for register constraints in the
1226 machine description. Also define ranges of constants.
1228 One of the classes must always be named ALL_REGS and include all hard regs.
1229 If there is more than one class, another class must be named NO_REGS
1230 and contain no registers.
1232 The name GENERAL_REGS must be the name of a class (or an alias for
1233 another name such as ALL_REGS). This is the class of registers
1234 that is allowed by "g" or "r" in a register constraint.
1235 Also, registers outside this class are allocated only when
1236 instructions express preferences for them.
1238 The classes must be numbered in nondecreasing order; that is,
1239 a larger-numbered class must never be contained completely
1240 in a smaller-numbered class.
1242 For any two classes, it is very desirable that there be another
1243 class that represents their union. */
1245 /* The RS/6000 has three types of registers, fixed-point, floating-point, and
1246 condition registers, plus three special registers, MQ, CTR, and the link
1247 register. AltiVec adds a vector register class. VSX registers overlap the
1248 FPR registers and the Altivec registers.
1250 However, r0 is special in that it cannot be used as a base register.
1251 So make a class for registers valid as base registers.
1253 Also, cr0 is the only condition code register that can be used in
1254 arithmetic insns, so make a separate class for it. */
1283 #define N_REG_CLASSES (int) LIM_REG_CLASSES
1285 /* Give names of register classes as strings for dump file. */
1287 #define REG_CLASS_NAMES \
1299 "NON_SPECIAL_REGS", \
1303 "LINK_OR_CTR_REGS", \
1305 "SPEC_OR_GEN_REGS", \
1313 /* Define which registers fit in which classes.
1314 This is an initializer for a vector of HARD_REG_SET
1315 of length N_REG_CLASSES. */
1317 #define REG_CLASS_CONTENTS \
1319 { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* NO_REGS */ \
1320 { 0xfffffffe, 0x00000000, 0x00000008, 0x00020000 }, /* BASE_REGS */ \
1321 { 0xffffffff, 0x00000000, 0x00000008, 0x00020000 }, /* GENERAL_REGS */ \
1322 { 0x00000000, 0xffffffff, 0x00000000, 0x00000000 }, /* FLOAT_REGS */ \
1323 { 0x00000000, 0x00000000, 0xffffe000, 0x00001fff }, /* ALTIVEC_REGS */ \
1324 { 0x00000000, 0xffffffff, 0xffffe000, 0x00001fff }, /* VSX_REGS */ \
1325 { 0x00000000, 0x00000000, 0x00000000, 0x00002000 }, /* VRSAVE_REGS */ \
1326 { 0x00000000, 0x00000000, 0x00000000, 0x00004000 }, /* VSCR_REGS */ \
1327 { 0x00000000, 0x00000000, 0x00000000, 0x00008000 }, /* SPE_ACC_REGS */ \
1328 { 0x00000000, 0x00000000, 0x00000000, 0x00010000 }, /* SPEFSCR_REGS */ \
1329 { 0xffffffff, 0xffffffff, 0x00000008, 0x00020000 }, /* NON_SPECIAL_REGS */ \
1330 { 0x00000000, 0x00000000, 0x00000001, 0x00000000 }, /* MQ_REGS */ \
1331 { 0x00000000, 0x00000000, 0x00000002, 0x00000000 }, /* LINK_REGS */ \
1332 { 0x00000000, 0x00000000, 0x00000004, 0x00000000 }, /* CTR_REGS */ \
1333 { 0x00000000, 0x00000000, 0x00000006, 0x00000000 }, /* LINK_OR_CTR_REGS */ \
1334 { 0x00000000, 0x00000000, 0x00000007, 0x00002000 }, /* SPECIAL_REGS */ \
1335 { 0xffffffff, 0x00000000, 0x0000000f, 0x00022000 }, /* SPEC_OR_GEN_REGS */ \
1336 { 0x00000000, 0x00000000, 0x00000010, 0x00000000 }, /* CR0_REGS */ \
1337 { 0x00000000, 0x00000000, 0x00000ff0, 0x00000000 }, /* CR_REGS */ \
1338 { 0xffffffff, 0x00000000, 0x0000efff, 0x00020000 }, /* NON_FLOAT_REGS */ \
1339 { 0x00000000, 0x00000000, 0x00001000, 0x00000000 }, /* CA_REGS */ \
1340 { 0xffffffff, 0xffffffff, 0xffffffff, 0x0003ffff } /* ALL_REGS */ \
1343 /* The following macro defines cover classes for Integrated Register
1344 Allocator. Cover classes is a set of non-intersected register
1345 classes covering all hard registers used for register allocation
1346 purpose. Any move between two registers of a cover class should be
1347 cheaper than load or store of the registers. The macro value is
1348 array of register classes with LIM_REG_CLASSES used as the end
1351 We need two IRA_COVER_CLASSES, one for pre-VSX, and the other for VSX to
1352 account for the Altivec and Floating registers being subsets of the VSX
1355 #define IRA_COVER_CLASSES_PRE_VSX \
1357 GENERAL_REGS, SPECIAL_REGS, FLOAT_REGS, ALTIVEC_REGS, /* VSX_REGS, */ \
1358 /* VRSAVE_REGS,*/ VSCR_REGS, SPE_ACC_REGS, SPEFSCR_REGS, \
1359 /* MQ_REGS, LINK_REGS, CTR_REGS, */ \
1360 CR_REGS, CA_REGS, LIM_REG_CLASSES \
1363 #define IRA_COVER_CLASSES_VSX \
1365 GENERAL_REGS, SPECIAL_REGS, /* FLOAT_REGS, ALTIVEC_REGS, */ VSX_REGS, \
1366 /* VRSAVE_REGS,*/ VSCR_REGS, SPE_ACC_REGS, SPEFSCR_REGS, \
1367 /* MQ_REGS, LINK_REGS, CTR_REGS, */ \
1368 CR_REGS, CA_REGS, LIM_REG_CLASSES \
1371 /* The same information, inverted:
1372 Return the class number of the smallest class containing
1373 reg number REGNO. This could be a conditional expression
1374 or could index an array. */
1376 extern enum reg_class rs6000_regno_regclass[FIRST_PSEUDO_REGISTER];
1379 #define REGNO_REG_CLASS(REGNO) \
1380 (gcc_assert (IN_RANGE ((REGNO), 0, FIRST_PSEUDO_REGISTER-1)), \
1381 rs6000_regno_regclass[(REGNO)])
1384 #define REGNO_REG_CLASS(REGNO) rs6000_regno_regclass[(REGNO)]
1387 /* Register classes for various constraints that are based on the target
1389 enum r6000_reg_class_enum {
1390 RS6000_CONSTRAINT_d, /* fpr registers for double values */
1391 RS6000_CONSTRAINT_f, /* fpr registers for single values */
1392 RS6000_CONSTRAINT_v, /* Altivec registers */
1393 RS6000_CONSTRAINT_wa, /* Any VSX register */
1394 RS6000_CONSTRAINT_wd, /* VSX register for V2DF */
1395 RS6000_CONSTRAINT_wf, /* VSX register for V4SF */
1396 RS6000_CONSTRAINT_ws, /* VSX register for DF */
1397 RS6000_CONSTRAINT_MAX
1400 extern enum reg_class rs6000_constraints[RS6000_CONSTRAINT_MAX];
1402 /* The class value for index registers, and the one for base regs. */
1403 #define INDEX_REG_CLASS GENERAL_REGS
1404 #define BASE_REG_CLASS BASE_REGS
1406 /* Return whether a given register class can hold VSX objects. */
1407 #define VSX_REG_CLASS_P(CLASS) \
1408 ((CLASS) == VSX_REGS || (CLASS) == FLOAT_REGS || (CLASS) == ALTIVEC_REGS)
1410 /* Given an rtx X being reloaded into a reg required to be
1411 in class CLASS, return the class of reg to actually use.
1412 In general this is just CLASS; but on some machines
1413 in some cases it is preferable to use a more restrictive class.
1415 On the RS/6000, we have to return NO_REGS when we want to reload a
1416 floating-point CONST_DOUBLE to force it to be copied to memory.
1418 We also don't want to reload integer values into floating-point
1419 registers if we can at all help it. In fact, this can
1420 cause reload to die, if it tries to generate a reload of CTR
1421 into a FP register and discovers it doesn't have the memory location
1424 ??? Would it be a good idea to have reload do the converse, that is
1425 try to reload floating modes into FP registers if possible?
1428 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
1429 rs6000_preferred_reload_class_ptr (X, CLASS)
1431 /* Return the register class of a scratch register needed to copy IN into
1432 or out of a register in CLASS in MODE. If it can be done directly,
1433 NO_REGS is returned. */
1435 #define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \
1436 rs6000_secondary_reload_class_ptr (CLASS, MODE, IN)
1438 /* If we are copying between FP or AltiVec registers and anything
1439 else, we need a memory location. The exception is when we are
1440 targeting ppc64 and the move to/from fpr to gpr instructions
1443 #define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) \
1444 rs6000_secondary_memory_needed_ptr (CLASS1, CLASS2, MODE)
1446 /* For cpus that cannot load/store SDmode values from the 64-bit
1447 FP registers without using a full 64-bit load/store, we need
1448 to allocate a full 64-bit stack slot for them. */
1450 #define SECONDARY_MEMORY_NEEDED_RTX(MODE) \
1451 rs6000_secondary_memory_needed_rtx (MODE)
1453 /* Return the maximum number of consecutive registers
1454 needed to represent mode MODE in a register of class CLASS.
1456 On RS/6000, this is the size of MODE in words, except in the FP regs, where
1457 a single reg is enough for two words, unless we have VSX, where the FP
1458 registers can hold 128 bits. */
1459 #define CLASS_MAX_NREGS(CLASS, MODE) rs6000_class_max_nregs[(MODE)][(CLASS)]
1461 /* Return nonzero if for CLASS a mode change from FROM to TO is invalid. */
1463 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
1464 rs6000_cannot_change_mode_class_ptr (FROM, TO, CLASS)
1466 /* Stack layout; function entry, exit and calling. */
1468 /* Enumeration to give which calling sequence to use. */
1471 ABI_AIX, /* IBM's AIX */
1472 ABI_V4, /* System V.4/eabi */
1473 ABI_DARWIN /* Apple's Darwin (OS X kernel) */
1476 extern enum rs6000_abi rs6000_current_abi; /* available for use by subtarget */
1478 /* Define this if pushing a word on the stack
1479 makes the stack pointer a smaller address. */
1480 #define STACK_GROWS_DOWNWARD
1482 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
1483 #define DWARF_CIE_DATA_ALIGNMENT (-((int) (TARGET_32BIT ? 4 : 8)))
1485 /* Define this to nonzero if the nominal address of the stack frame
1486 is at the high-address end of the local variables;
1487 that is, each additional local variable allocated
1488 goes at a more negative offset in the frame.
1490 On the RS/6000, we grow upwards, from the area after the outgoing
1492 #define FRAME_GROWS_DOWNWARD (flag_stack_protect != 0)
1494 /* Size of the outgoing register save area */
1495 #define RS6000_REG_SAVE ((DEFAULT_ABI == ABI_AIX \
1496 || DEFAULT_ABI == ABI_DARWIN) \
1497 ? (TARGET_64BIT ? 64 : 32) \
1500 /* Size of the fixed area on the stack */
1501 #define RS6000_SAVE_AREA \
1502 (((DEFAULT_ABI == ABI_AIX || DEFAULT_ABI == ABI_DARWIN) ? 24 : 8) \
1503 << (TARGET_64BIT ? 1 : 0))
1505 /* MEM representing address to save the TOC register */
1506 #define RS6000_SAVE_TOC gen_rtx_MEM (Pmode, \
1507 plus_constant (stack_pointer_rtx, \
1508 (TARGET_32BIT ? 20 : 40)))
1510 /* Align an address */
1511 #define RS6000_ALIGN(n,a) (((n) + (a) - 1) & ~((a) - 1))
1513 /* Offset within stack frame to start allocating local variables at.
1514 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
1515 first local allocated. Otherwise, it is the offset to the BEGINNING
1516 of the first local allocated.
1518 On the RS/6000, the frame pointer is the same as the stack pointer,
1519 except for dynamic allocations. So we start after the fixed area and
1520 outgoing parameter area. */
1522 #define STARTING_FRAME_OFFSET \
1523 (FRAME_GROWS_DOWNWARD \
1525 : (RS6000_ALIGN (crtl->outgoing_args_size, \
1526 (TARGET_ALTIVEC || TARGET_VSX) ? 16 : 8) \
1527 + RS6000_SAVE_AREA))
1529 /* Offset from the stack pointer register to an item dynamically
1530 allocated on the stack, e.g., by `alloca'.
1532 The default value for this macro is `STACK_POINTER_OFFSET' plus the
1533 length of the outgoing arguments. The default is correct for most
1534 machines. See `function.c' for details. */
1535 #define STACK_DYNAMIC_OFFSET(FUNDECL) \
1536 (RS6000_ALIGN (crtl->outgoing_args_size, \
1537 (TARGET_ALTIVEC || TARGET_VSX) ? 16 : 8) \
1538 + (STACK_POINTER_OFFSET))
1540 /* If we generate an insn to push BYTES bytes,
1541 this says how many the stack pointer really advances by.
1542 On RS/6000, don't define this because there are no push insns. */
1543 /* #define PUSH_ROUNDING(BYTES) */
1545 /* Offset of first parameter from the argument pointer register value.
1546 On the RS/6000, we define the argument pointer to the start of the fixed
1548 #define FIRST_PARM_OFFSET(FNDECL) RS6000_SAVE_AREA
1550 /* Offset from the argument pointer register value to the top of
1551 stack. This is different from FIRST_PARM_OFFSET because of the
1552 register save area. */
1553 #define ARG_POINTER_CFA_OFFSET(FNDECL) 0
1555 /* Define this if stack space is still allocated for a parameter passed
1556 in a register. The value is the number of bytes allocated to this
1558 #define REG_PARM_STACK_SPACE(FNDECL) RS6000_REG_SAVE
1560 /* Define this if the above stack space is to be considered part of the
1561 space allocated by the caller. */
1562 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1
1564 /* This is the difference between the logical top of stack and the actual sp.
1566 For the RS/6000, sp points past the fixed area. */
1567 #define STACK_POINTER_OFFSET RS6000_SAVE_AREA
1569 /* Define this if the maximum size of all the outgoing args is to be
1570 accumulated and pushed during the prologue. The amount can be
1571 found in the variable crtl->outgoing_args_size. */
1572 #define ACCUMULATE_OUTGOING_ARGS 1
1574 /* Define how to find the value returned by a library function
1575 assuming the value has mode MODE. */
1577 #define LIBCALL_VALUE(MODE) rs6000_libcall_value ((MODE))
1579 /* DRAFT_V4_STRUCT_RET defaults off. */
1580 #define DRAFT_V4_STRUCT_RET 0
1582 /* Let TARGET_RETURN_IN_MEMORY control what happens. */
1583 #define DEFAULT_PCC_STRUCT_RETURN 0
1585 /* Mode of stack savearea.
1586 FUNCTION is VOIDmode because calling convention maintains SP.
1587 BLOCK needs Pmode for SP.
1588 NONLOCAL needs twice Pmode to maintain both backchain and SP. */
1589 #define STACK_SAVEAREA_MODE(LEVEL) \
1590 (LEVEL == SAVE_FUNCTION ? VOIDmode \
1591 : LEVEL == SAVE_NONLOCAL ? (TARGET_32BIT ? DImode : TImode) : Pmode)
1593 /* Minimum and maximum general purpose registers used to hold arguments. */
1594 #define GP_ARG_MIN_REG 3
1595 #define GP_ARG_MAX_REG 10
1596 #define GP_ARG_NUM_REG (GP_ARG_MAX_REG - GP_ARG_MIN_REG + 1)
1598 /* Minimum and maximum floating point registers used to hold arguments. */
1599 #define FP_ARG_MIN_REG 33
1600 #define FP_ARG_AIX_MAX_REG 45
1601 #define FP_ARG_V4_MAX_REG 40
1602 #define FP_ARG_MAX_REG ((DEFAULT_ABI == ABI_AIX \
1603 || DEFAULT_ABI == ABI_DARWIN) \
1604 ? FP_ARG_AIX_MAX_REG : FP_ARG_V4_MAX_REG)
1605 #define FP_ARG_NUM_REG (FP_ARG_MAX_REG - FP_ARG_MIN_REG + 1)
1607 /* Minimum and maximum AltiVec registers used to hold arguments. */
1608 #define ALTIVEC_ARG_MIN_REG (FIRST_ALTIVEC_REGNO + 2)
1609 #define ALTIVEC_ARG_MAX_REG (ALTIVEC_ARG_MIN_REG + 11)
1610 #define ALTIVEC_ARG_NUM_REG (ALTIVEC_ARG_MAX_REG - ALTIVEC_ARG_MIN_REG + 1)
1612 /* Return registers */
1613 #define GP_ARG_RETURN GP_ARG_MIN_REG
1614 #define FP_ARG_RETURN FP_ARG_MIN_REG
1615 #define ALTIVEC_ARG_RETURN (FIRST_ALTIVEC_REGNO + 2)
1617 /* Flags for the call/call_value rtl operations set up by function_arg */
1618 #define CALL_NORMAL 0x00000000 /* no special processing */
1619 /* Bits in 0x00000001 are unused. */
1620 #define CALL_V4_CLEAR_FP_ARGS 0x00000002 /* V.4, no FP args passed */
1621 #define CALL_V4_SET_FP_ARGS 0x00000004 /* V.4, FP args were passed */
1622 #define CALL_LONG 0x00000008 /* always call indirect */
1623 #define CALL_LIBCALL 0x00000010 /* libcall */
1625 /* We don't have prologue and epilogue functions to save/restore
1626 everything for most ABIs. */
1627 #define WORLD_SAVE_P(INFO) 0
1629 /* 1 if N is a possible register number for a function value
1630 as seen by the caller.
1632 On RS/6000, this is r3, fp1, and v2 (for AltiVec). */
1633 #define FUNCTION_VALUE_REGNO_P(N) \
1634 ((N) == GP_ARG_RETURN \
1635 || ((N) == FP_ARG_RETURN && TARGET_HARD_FLOAT && TARGET_FPRS) \
1636 || ((N) == ALTIVEC_ARG_RETURN && TARGET_ALTIVEC && TARGET_ALTIVEC_ABI))
1638 /* 1 if N is a possible register number for function argument passing.
1639 On RS/6000, these are r3-r10 and fp1-fp13.
1640 On AltiVec, v2 - v13 are used for passing vectors. */
1641 #define FUNCTION_ARG_REGNO_P(N) \
1642 ((unsigned) (N) - GP_ARG_MIN_REG < GP_ARG_NUM_REG \
1643 || ((unsigned) (N) - ALTIVEC_ARG_MIN_REG < ALTIVEC_ARG_NUM_REG \
1644 && TARGET_ALTIVEC && TARGET_ALTIVEC_ABI) \
1645 || ((unsigned) (N) - FP_ARG_MIN_REG < FP_ARG_NUM_REG \
1646 && TARGET_HARD_FLOAT && TARGET_FPRS))
1648 /* Define a data type for recording info about an argument list
1649 during the scan of that argument list. This data type should
1650 hold all necessary information about the function itself
1651 and about the args processed so far, enough to enable macros
1652 such as FUNCTION_ARG to determine where the next arg should go.
1654 On the RS/6000, this is a structure. The first element is the number of
1655 total argument words, the second is used to store the next
1656 floating-point register number, and the third says how many more args we
1657 have prototype types for.
1659 For ABI_V4, we treat these slightly differently -- `sysv_gregno' is
1660 the next available GP register, `fregno' is the next available FP
1661 register, and `words' is the number of words used on the stack.
1663 The varargs/stdarg support requires that this structure's size
1664 be a multiple of sizeof(int). */
1666 typedef struct rs6000_args
1668 int words; /* # words used for passing GP registers */
1669 int fregno; /* next available FP register */
1670 int vregno; /* next available AltiVec register */
1671 int nargs_prototype; /* # args left in the current prototype */
1672 int prototype; /* Whether a prototype was defined */
1673 int stdarg; /* Whether function is a stdarg function. */
1674 int call_cookie; /* Do special things for this call */
1675 int sysv_gregno; /* next available GP register */
1676 int intoffset; /* running offset in struct (darwin64) */
1677 int use_stack; /* any part of struct on stack (darwin64) */
1678 int floats_in_gpr; /* count of SFmode floats taking up
1679 GPR space (darwin64) */
1680 int named; /* false for varargs params */
1683 /* Initialize a variable CUM of type CUMULATIVE_ARGS
1684 for a call to a function whose data type is FNTYPE.
1685 For a library call, FNTYPE is 0. */
1687 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
1688 init_cumulative_args (&CUM, FNTYPE, LIBNAME, FALSE, FALSE, N_NAMED_ARGS)
1690 /* Similar, but when scanning the definition of a procedure. We always
1691 set NARGS_PROTOTYPE large so we never return an EXPR_LIST. */
1693 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \
1694 init_cumulative_args (&CUM, FNTYPE, LIBNAME, TRUE, FALSE, 1000)
1696 /* Like INIT_CUMULATIVE_ARGS' but only used for outgoing libcalls. */
1698 #define INIT_CUMULATIVE_LIBCALL_ARGS(CUM, MODE, LIBNAME) \
1699 init_cumulative_args (&CUM, NULL_TREE, LIBNAME, FALSE, TRUE, 0)
1701 /* If defined, a C expression which determines whether, and in which
1702 direction, to pad out an argument with extra space. The value
1703 should be of type `enum direction': either `upward' to pad above
1704 the argument, `downward' to pad below, or `none' to inhibit
1707 #define FUNCTION_ARG_PADDING(MODE, TYPE) function_arg_padding (MODE, TYPE)
1709 /* If defined, a C expression that gives the alignment boundary, in bits,
1710 of an argument with the specified mode and type. If it is not defined,
1711 PARM_BOUNDARY is used for all arguments. */
1713 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
1714 function_arg_boundary (MODE, TYPE)
1716 #define PAD_VARARGS_DOWN \
1717 (FUNCTION_ARG_PADDING (TYPE_MODE (type), type) == downward)
1719 /* Output assembler code to FILE to increment profiler label # LABELNO
1720 for profiling a function entry. */
1722 #define FUNCTION_PROFILER(FILE, LABELNO) \
1723 output_function_profiler ((FILE), (LABELNO));
1725 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1726 the stack pointer does not matter. No definition is equivalent to
1729 On the RS/6000, this is nonzero because we can restore the stack from
1730 its backpointer, which we maintain. */
1731 #define EXIT_IGNORE_STACK 1
1733 /* Define this macro as a C expression that is nonzero for registers
1734 that are used by the epilogue or the return' pattern. The stack
1735 and frame pointer registers are already be assumed to be used as
1738 #define EPILOGUE_USES(REGNO) \
1739 ((reload_completed && (REGNO) == LR_REGNO) \
1740 || (TARGET_ALTIVEC && (REGNO) == VRSAVE_REGNO) \
1741 || (crtl->calls_eh_return \
1746 /* Length in units of the trampoline for entering a nested function. */
1748 #define TRAMPOLINE_SIZE rs6000_trampoline_size ()
1750 /* Definitions for __builtin_return_address and __builtin_frame_address.
1751 __builtin_return_address (0) should give link register (65), enable
1753 /* This should be uncommented, so that the link register is used, but
1754 currently this would result in unmatched insns and spilling fixed
1755 registers so we'll leave it for another day. When these problems are
1756 taken care of one additional fetch will be necessary in RETURN_ADDR_RTX.
1758 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */
1760 /* Number of bytes into the frame return addresses can be found. See
1761 rs6000_stack_info in rs6000.c for more information on how the different
1762 abi's store the return address. */
1763 #define RETURN_ADDRESS_OFFSET \
1764 ((DEFAULT_ABI == ABI_AIX \
1765 || DEFAULT_ABI == ABI_DARWIN) ? (TARGET_32BIT ? 8 : 16) : \
1766 (DEFAULT_ABI == ABI_V4) ? 4 : \
1767 (internal_error ("RETURN_ADDRESS_OFFSET not supported"), 0))
1769 /* The current return address is in link register (65). The return address
1770 of anything farther back is accessed normally at an offset of 8 from the
1772 #define RETURN_ADDR_RTX(COUNT, FRAME) \
1773 (rs6000_return_addr (COUNT, FRAME))
1776 /* Definitions for register eliminations.
1778 We have two registers that can be eliminated on the RS/6000. First, the
1779 frame pointer register can often be eliminated in favor of the stack
1780 pointer register. Secondly, the argument pointer register can always be
1781 eliminated; it is replaced with either the stack or frame pointer.
1783 In addition, we use the elimination mechanism to see if r30 is needed
1784 Initially we assume that it isn't. If it is, we spill it. This is done
1785 by making it an eliminable register. We replace it with itself so that
1786 if it isn't needed, then existing uses won't be modified. */
1788 /* This is an array of structures. Each structure initializes one pair
1789 of eliminable registers. The "from" register number is given first,
1790 followed by "to". Eliminations of the same "from" register are listed
1791 in order of preference. */
1792 #define ELIMINABLE_REGS \
1793 {{ HARD_FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1794 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1795 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
1796 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1797 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
1798 { RS6000_PIC_OFFSET_TABLE_REGNUM, RS6000_PIC_OFFSET_TABLE_REGNUM } }
1800 /* Define the offset between two registers, one to be eliminated, and the other
1801 its replacement, at the start of a routine. */
1802 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1803 ((OFFSET) = rs6000_initial_elimination_offset(FROM, TO))
1805 /* Addressing modes, and classification of registers for them. */
1807 #define HAVE_PRE_DECREMENT 1
1808 #define HAVE_PRE_INCREMENT 1
1809 #define HAVE_PRE_MODIFY_DISP 1
1810 #define HAVE_PRE_MODIFY_REG 1
1812 /* Macros to check register numbers against specific register classes. */
1814 /* These assume that REGNO is a hard or pseudo reg number.
1815 They give nonzero only if REGNO is a hard reg of the suitable class
1816 or a pseudo reg currently allocated to a suitable hard reg.
1817 Since they use reg_renumber, they are safe only once reg_renumber
1818 has been allocated, which happens in local-alloc.c. */
1820 #define REGNO_OK_FOR_INDEX_P(REGNO) \
1821 ((REGNO) < FIRST_PSEUDO_REGISTER \
1822 ? (REGNO) <= 31 || (REGNO) == 67 \
1823 || (REGNO) == FRAME_POINTER_REGNUM \
1824 : (reg_renumber[REGNO] >= 0 \
1825 && (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67 \
1826 || reg_renumber[REGNO] == FRAME_POINTER_REGNUM)))
1828 #define REGNO_OK_FOR_BASE_P(REGNO) \
1829 ((REGNO) < FIRST_PSEUDO_REGISTER \
1830 ? ((REGNO) > 0 && (REGNO) <= 31) || (REGNO) == 67 \
1831 || (REGNO) == FRAME_POINTER_REGNUM \
1832 : (reg_renumber[REGNO] > 0 \
1833 && (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67 \
1834 || reg_renumber[REGNO] == FRAME_POINTER_REGNUM)))
1836 /* Nonzero if X is a hard reg that can be used as an index
1837 or if it is a pseudo reg in the non-strict case. */
1838 #define INT_REG_OK_FOR_INDEX_P(X, STRICT) \
1839 ((!(STRICT) && REGNO (X) >= FIRST_PSEUDO_REGISTER) \
1840 || REGNO_OK_FOR_INDEX_P (REGNO (X)))
1842 /* Nonzero if X is a hard reg that can be used as a base reg
1843 or if it is a pseudo reg in the non-strict case. */
1844 #define INT_REG_OK_FOR_BASE_P(X, STRICT) \
1845 ((!(STRICT) && REGNO (X) >= FIRST_PSEUDO_REGISTER) \
1846 || REGNO_OK_FOR_BASE_P (REGNO (X)))
1849 /* Maximum number of registers that can appear in a valid memory address. */
1851 #define MAX_REGS_PER_ADDRESS 2
1853 /* Recognize any constant value that is a valid address. */
1855 #define CONSTANT_ADDRESS_P(X) \
1856 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
1857 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST \
1858 || GET_CODE (X) == HIGH)
1860 /* Nonzero if the constant value X is a legitimate general operand.
1861 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
1863 On the RS/6000, all integer constants are acceptable, most won't be valid
1864 for particular insns, though. Only easy FP constants are
1867 #define LEGITIMATE_CONSTANT_P(X) \
1868 (((GET_CODE (X) != CONST_DOUBLE \
1869 && GET_CODE (X) != CONST_VECTOR) \
1870 || GET_MODE (X) == VOIDmode \
1871 || (TARGET_POWERPC64 && GET_MODE (X) == DImode) \
1872 || easy_fp_constant (X, GET_MODE (X)) \
1873 || easy_vector_constant (X, GET_MODE (X))) \
1874 && !rs6000_tls_referenced_p (X))
1876 #define EASY_VECTOR_15(n) ((n) >= -16 && (n) <= 15)
1877 #define EASY_VECTOR_15_ADD_SELF(n) (!EASY_VECTOR_15((n)) \
1878 && EASY_VECTOR_15((n) >> 1) \
1881 #define EASY_VECTOR_MSB(n,mode) \
1882 (((unsigned HOST_WIDE_INT)n) == \
1883 ((((unsigned HOST_WIDE_INT)GET_MODE_MASK (mode)) + 1) >> 1))
1886 /* Try a machine-dependent way of reloading an illegitimate address
1887 operand. If we find one, push the reload and jump to WIN. This
1888 macro is used in only one place: `find_reloads_address' in reload.c.
1890 Implemented on rs6000 by rs6000_legitimize_reload_address.
1891 Note that (X) is evaluated twice; this is safe in current usage. */
1893 #define LEGITIMIZE_RELOAD_ADDRESS(X,MODE,OPNUM,TYPE,IND_LEVELS,WIN) \
1896 (X) = rs6000_legitimize_reload_address_ptr ((X), (MODE), (OPNUM), \
1897 (int)(TYPE), (IND_LEVELS), &win); \
1902 #define FIND_BASE_TERM rs6000_find_base_term
1904 /* The register number of the register used to address a table of
1905 static data addresses in memory. In some cases this register is
1906 defined by a processor's "application binary interface" (ABI).
1907 When this macro is defined, RTL is generated for this register
1908 once, as with the stack pointer and frame pointer registers. If
1909 this macro is not defined, it is up to the machine-dependent files
1910 to allocate such a register (if necessary). */
1912 #define RS6000_PIC_OFFSET_TABLE_REGNUM 30
1913 #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? RS6000_PIC_OFFSET_TABLE_REGNUM : INVALID_REGNUM)
1915 #define TOC_REGISTER (TARGET_MINIMAL_TOC ? RS6000_PIC_OFFSET_TABLE_REGNUM : 2)
1917 /* Define this macro if the register defined by
1918 `PIC_OFFSET_TABLE_REGNUM' is clobbered by calls. Do not define
1919 this macro if `PIC_OFFSET_TABLE_REGNUM' is not defined. */
1921 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */
1923 /* A C expression that is nonzero if X is a legitimate immediate
1924 operand on the target machine when generating position independent
1925 code. You can assume that X satisfies `CONSTANT_P', so you need
1926 not check this. You can also assume FLAG_PIC is true, so you need
1927 not check it either. You need not define this macro if all
1928 constants (including `SYMBOL_REF') can be immediate operands when
1929 generating position independent code. */
1931 /* #define LEGITIMATE_PIC_OPERAND_P (X) */
1933 /* Define this if some processing needs to be done immediately before
1934 emitting code for an insn. */
1936 #define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS) \
1937 rs6000_final_prescan_insn (INSN, OPERANDS, NOPERANDS)
1939 /* Specify the machine mode that this machine uses
1940 for the index in the tablejump instruction. */
1941 #define CASE_VECTOR_MODE SImode
1943 /* Define as C expression which evaluates to nonzero if the tablejump
1944 instruction expects the table to contain offsets from the address of the
1946 Do not define this if the table should contain absolute addresses. */
1947 #define CASE_VECTOR_PC_RELATIVE 1
1949 /* Define this as 1 if `char' should by default be signed; else as 0. */
1950 #define DEFAULT_SIGNED_CHAR 0
1952 /* This flag, if defined, says the same insns that convert to a signed fixnum
1953 also convert validly to an unsigned one. */
1955 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
1957 /* An integer expression for the size in bits of the largest integer machine
1958 mode that should actually be used. */
1960 /* Allow pairs of registers to be used, which is the intent of the default. */
1961 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TARGET_POWERPC64 ? TImode : DImode)
1963 /* Max number of bytes we can move from memory to memory
1964 in one reasonably fast instruction. */
1965 #define MOVE_MAX (! TARGET_POWERPC64 ? 4 : 8)
1966 #define MAX_MOVE_MAX 8
1968 /* Nonzero if access to memory by bytes is no faster than for words.
1969 Also nonzero if doing byte operations (specifically shifts) in registers
1971 #define SLOW_BYTE_ACCESS 1
1973 /* Define if operations between registers always perform the operation
1974 on the full register even if a narrower mode is specified. */
1975 #define WORD_REGISTER_OPERATIONS
1977 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD
1978 will either zero-extend or sign-extend. The value of this macro should
1979 be the code that says which one of the two operations is implicitly
1980 done, UNKNOWN if none. */
1981 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
1983 /* Define if loading short immediate values into registers sign extends. */
1984 #define SHORT_IMMEDIATES_SIGN_EXTEND
1986 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1987 is done just by pretending it is already truncated. */
1988 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1990 /* The cntlzw and cntlzd instructions return 32 and 64 for input of zero. */
1991 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
1992 ((VALUE) = ((MODE) == SImode ? 32 : 64), 1)
1994 /* The CTZ patterns return -1 for input of zero. */
1995 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = -1, 1)
1997 /* Specify the machine mode that pointers have.
1998 After generation of rtl, the compiler makes no further distinction
1999 between pointers and any other objects of this machine mode. */
2000 extern unsigned rs6000_pmode;
2001 #define Pmode ((enum machine_mode)rs6000_pmode)
2003 /* Supply definition of STACK_SIZE_MODE for allocate_dynamic_stack_space. */
2004 #define STACK_SIZE_MODE (TARGET_32BIT ? SImode : DImode)
2006 /* Mode of a function address in a call instruction (for indexing purposes).
2007 Doesn't matter on RS/6000. */
2008 #define FUNCTION_MODE SImode
2010 /* Define this if addresses of constant functions
2011 shouldn't be put through pseudo regs where they can be cse'd.
2012 Desirable on machines where ordinary constants are expensive
2013 but a CALL with constant address is cheap. */
2014 #define NO_FUNCTION_CSE
2016 /* Define this to be nonzero if shift instructions ignore all but the low-order
2019 The sle and sre instructions which allow SHIFT_COUNT_TRUNCATED
2020 have been dropped from the PowerPC architecture. */
2022 #define SHIFT_COUNT_TRUNCATED (TARGET_POWER ? 1 : 0)
2024 /* Adjust the length of an INSN. LENGTH is the currently-computed length and
2025 should be adjusted to reflect any required changes. This macro is used when
2026 there is some systematic length adjustment required that would be difficult
2027 to express in the length attribute. */
2029 /* #define ADJUST_INSN_LENGTH(X,LENGTH) */
2031 /* Given a comparison code (EQ, NE, etc.) and the first operand of a
2032 COMPARE, return the mode to be used for the comparison. For
2033 floating-point, CCFPmode should be used. CCUNSmode should be used
2034 for unsigned comparisons. CCEQmode should be used when we are
2035 doing an inequality comparison on the result of a
2036 comparison. CCmode should be used in all other cases. */
2038 #define SELECT_CC_MODE(OP,X,Y) \
2039 (SCALAR_FLOAT_MODE_P (GET_MODE (X)) ? CCFPmode \
2040 : (OP) == GTU || (OP) == LTU || (OP) == GEU || (OP) == LEU ? CCUNSmode \
2041 : (((OP) == EQ || (OP) == NE) && COMPARISON_P (X) \
2042 ? CCEQmode : CCmode))
2044 /* Can the condition code MODE be safely reversed? This is safe in
2045 all cases on this port, because at present it doesn't use the
2046 trapping FP comparisons (fcmpo). */
2047 #define REVERSIBLE_CC_MODE(MODE) 1
2049 /* Given a condition code and a mode, return the inverse condition. */
2050 #define REVERSE_CONDITION(CODE, MODE) rs6000_reverse_condition (MODE, CODE)
2053 /* Control the assembler format that we output. */
2055 /* A C string constant describing how to begin a comment in the target
2056 assembler language. The compiler assumes that the comment will end at
2057 the end of the line. */
2058 #define ASM_COMMENT_START " #"
2060 /* Flag to say the TOC is initialized */
2061 extern int toc_initialized;
2063 /* Macro to output a special constant pool entry. Go to WIN if we output
2064 it. Otherwise, it is written the usual way.
2066 On the RS/6000, toc entries are handled this way. */
2068 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, WIN) \
2069 { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X, MODE)) \
2071 output_toc (FILE, X, LABELNO, MODE); \
2076 #ifdef HAVE_GAS_WEAK
2077 #define RS6000_WEAK 1
2079 #define RS6000_WEAK 0
2083 /* Used in lieu of ASM_WEAKEN_LABEL. */
2084 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, VAL) \
2087 fputs ("\t.weak\t", (FILE)); \
2088 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
2089 if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL \
2090 && DEFAULT_ABI == ABI_AIX && DOT_SYMBOLS) \
2093 fputs ("[DS]", (FILE)); \
2094 fputs ("\n\t.weak\t.", (FILE)); \
2095 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
2097 fputc ('\n', (FILE)); \
2100 ASM_OUTPUT_DEF ((FILE), (NAME), (VAL)); \
2101 if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL \
2102 && DEFAULT_ABI == ABI_AIX && DOT_SYMBOLS) \
2104 fputs ("\t.set\t.", (FILE)); \
2105 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
2106 fputs (",.", (FILE)); \
2107 RS6000_OUTPUT_BASENAME ((FILE), (VAL)); \
2108 fputc ('\n', (FILE)); \
2115 #if HAVE_GAS_WEAKREF
2116 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \
2119 fputs ("\t.weakref\t", (FILE)); \
2120 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
2121 fputs (", ", (FILE)); \
2122 RS6000_OUTPUT_BASENAME ((FILE), (VALUE)); \
2123 if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL \
2124 && DEFAULT_ABI == ABI_AIX && DOT_SYMBOLS) \
2126 fputs ("\n\t.weakref\t.", (FILE)); \
2127 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
2128 fputs (", .", (FILE)); \
2129 RS6000_OUTPUT_BASENAME ((FILE), (VALUE)); \
2131 fputc ('\n', (FILE)); \
2135 /* This implements the `alias' attribute. */
2136 #undef ASM_OUTPUT_DEF_FROM_DECLS
2137 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET) \
2140 const char *alias = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
2141 const char *name = IDENTIFIER_POINTER (TARGET); \
2142 if (TREE_CODE (DECL) == FUNCTION_DECL \
2143 && DEFAULT_ABI == ABI_AIX && DOT_SYMBOLS) \
2145 if (TREE_PUBLIC (DECL)) \
2147 if (!RS6000_WEAK || !DECL_WEAK (DECL)) \
2149 fputs ("\t.globl\t.", FILE); \
2150 RS6000_OUTPUT_BASENAME (FILE, alias); \
2151 putc ('\n', FILE); \
2154 else if (TARGET_XCOFF) \
2156 fputs ("\t.lglobl\t.", FILE); \
2157 RS6000_OUTPUT_BASENAME (FILE, alias); \
2158 putc ('\n', FILE); \
2160 fputs ("\t.set\t.", FILE); \
2161 RS6000_OUTPUT_BASENAME (FILE, alias); \
2162 fputs (",.", FILE); \
2163 RS6000_OUTPUT_BASENAME (FILE, name); \
2164 fputc ('\n', FILE); \
2166 ASM_OUTPUT_DEF (FILE, alias, name); \
2170 #define TARGET_ASM_FILE_START rs6000_file_start
2172 /* Output to assembler file text saying following lines
2173 may contain character constants, extra white space, comments, etc. */
2175 #define ASM_APP_ON ""
2177 /* Output to assembler file text saying following lines
2178 no longer contain unusual constructs. */
2180 #define ASM_APP_OFF ""
2182 /* How to refer to registers in assembler output.
2183 This sequence is indexed by compiler's hard-register-number (see above). */
2185 extern char rs6000_reg_names[][8]; /* register names (0 vs. %r0). */
2187 #define REGISTER_NAMES \
2189 &rs6000_reg_names[ 0][0], /* r0 */ \
2190 &rs6000_reg_names[ 1][0], /* r1 */ \
2191 &rs6000_reg_names[ 2][0], /* r2 */ \
2192 &rs6000_reg_names[ 3][0], /* r3 */ \
2193 &rs6000_reg_names[ 4][0], /* r4 */ \
2194 &rs6000_reg_names[ 5][0], /* r5 */ \
2195 &rs6000_reg_names[ 6][0], /* r6 */ \
2196 &rs6000_reg_names[ 7][0], /* r7 */ \
2197 &rs6000_reg_names[ 8][0], /* r8 */ \
2198 &rs6000_reg_names[ 9][0], /* r9 */ \
2199 &rs6000_reg_names[10][0], /* r10 */ \
2200 &rs6000_reg_names[11][0], /* r11 */ \
2201 &rs6000_reg_names[12][0], /* r12 */ \
2202 &rs6000_reg_names[13][0], /* r13 */ \
2203 &rs6000_reg_names[14][0], /* r14 */ \
2204 &rs6000_reg_names[15][0], /* r15 */ \
2205 &rs6000_reg_names[16][0], /* r16 */ \
2206 &rs6000_reg_names[17][0], /* r17 */ \
2207 &rs6000_reg_names[18][0], /* r18 */ \
2208 &rs6000_reg_names[19][0], /* r19 */ \
2209 &rs6000_reg_names[20][0], /* r20 */ \
2210 &rs6000_reg_names[21][0], /* r21 */ \
2211 &rs6000_reg_names[22][0], /* r22 */ \
2212 &rs6000_reg_names[23][0], /* r23 */ \
2213 &rs6000_reg_names[24][0], /* r24 */ \
2214 &rs6000_reg_names[25][0], /* r25 */ \
2215 &rs6000_reg_names[26][0], /* r26 */ \
2216 &rs6000_reg_names[27][0], /* r27 */ \
2217 &rs6000_reg_names[28][0], /* r28 */ \
2218 &rs6000_reg_names[29][0], /* r29 */ \
2219 &rs6000_reg_names[30][0], /* r30 */ \
2220 &rs6000_reg_names[31][0], /* r31 */ \
2222 &rs6000_reg_names[32][0], /* fr0 */ \
2223 &rs6000_reg_names[33][0], /* fr1 */ \
2224 &rs6000_reg_names[34][0], /* fr2 */ \
2225 &rs6000_reg_names[35][0], /* fr3 */ \
2226 &rs6000_reg_names[36][0], /* fr4 */ \
2227 &rs6000_reg_names[37][0], /* fr5 */ \
2228 &rs6000_reg_names[38][0], /* fr6 */ \
2229 &rs6000_reg_names[39][0], /* fr7 */ \
2230 &rs6000_reg_names[40][0], /* fr8 */ \
2231 &rs6000_reg_names[41][0], /* fr9 */ \
2232 &rs6000_reg_names[42][0], /* fr10 */ \
2233 &rs6000_reg_names[43][0], /* fr11 */ \
2234 &rs6000_reg_names[44][0], /* fr12 */ \
2235 &rs6000_reg_names[45][0], /* fr13 */ \
2236 &rs6000_reg_names[46][0], /* fr14 */ \
2237 &rs6000_reg_names[47][0], /* fr15 */ \
2238 &rs6000_reg_names[48][0], /* fr16 */ \
2239 &rs6000_reg_names[49][0], /* fr17 */ \
2240 &rs6000_reg_names[50][0], /* fr18 */ \
2241 &rs6000_reg_names[51][0], /* fr19 */ \
2242 &rs6000_reg_names[52][0], /* fr20 */ \
2243 &rs6000_reg_names[53][0], /* fr21 */ \
2244 &rs6000_reg_names[54][0], /* fr22 */ \
2245 &rs6000_reg_names[55][0], /* fr23 */ \
2246 &rs6000_reg_names[56][0], /* fr24 */ \
2247 &rs6000_reg_names[57][0], /* fr25 */ \
2248 &rs6000_reg_names[58][0], /* fr26 */ \
2249 &rs6000_reg_names[59][0], /* fr27 */ \
2250 &rs6000_reg_names[60][0], /* fr28 */ \
2251 &rs6000_reg_names[61][0], /* fr29 */ \
2252 &rs6000_reg_names[62][0], /* fr30 */ \
2253 &rs6000_reg_names[63][0], /* fr31 */ \
2255 &rs6000_reg_names[64][0], /* mq */ \
2256 &rs6000_reg_names[65][0], /* lr */ \
2257 &rs6000_reg_names[66][0], /* ctr */ \
2258 &rs6000_reg_names[67][0], /* ap */ \
2260 &rs6000_reg_names[68][0], /* cr0 */ \
2261 &rs6000_reg_names[69][0], /* cr1 */ \
2262 &rs6000_reg_names[70][0], /* cr2 */ \
2263 &rs6000_reg_names[71][0], /* cr3 */ \
2264 &rs6000_reg_names[72][0], /* cr4 */ \
2265 &rs6000_reg_names[73][0], /* cr5 */ \
2266 &rs6000_reg_names[74][0], /* cr6 */ \
2267 &rs6000_reg_names[75][0], /* cr7 */ \
2269 &rs6000_reg_names[76][0], /* ca */ \
2271 &rs6000_reg_names[77][0], /* v0 */ \
2272 &rs6000_reg_names[78][0], /* v1 */ \
2273 &rs6000_reg_names[79][0], /* v2 */ \
2274 &rs6000_reg_names[80][0], /* v3 */ \
2275 &rs6000_reg_names[81][0], /* v4 */ \
2276 &rs6000_reg_names[82][0], /* v5 */ \
2277 &rs6000_reg_names[83][0], /* v6 */ \
2278 &rs6000_reg_names[84][0], /* v7 */ \
2279 &rs6000_reg_names[85][0], /* v8 */ \
2280 &rs6000_reg_names[86][0], /* v9 */ \
2281 &rs6000_reg_names[87][0], /* v10 */ \
2282 &rs6000_reg_names[88][0], /* v11 */ \
2283 &rs6000_reg_names[89][0], /* v12 */ \
2284 &rs6000_reg_names[90][0], /* v13 */ \
2285 &rs6000_reg_names[91][0], /* v14 */ \
2286 &rs6000_reg_names[92][0], /* v15 */ \
2287 &rs6000_reg_names[93][0], /* v16 */ \
2288 &rs6000_reg_names[94][0], /* v17 */ \
2289 &rs6000_reg_names[95][0], /* v18 */ \
2290 &rs6000_reg_names[96][0], /* v19 */ \
2291 &rs6000_reg_names[97][0], /* v20 */ \
2292 &rs6000_reg_names[98][0], /* v21 */ \
2293 &rs6000_reg_names[99][0], /* v22 */ \
2294 &rs6000_reg_names[100][0], /* v23 */ \
2295 &rs6000_reg_names[101][0], /* v24 */ \
2296 &rs6000_reg_names[102][0], /* v25 */ \
2297 &rs6000_reg_names[103][0], /* v26 */ \
2298 &rs6000_reg_names[104][0], /* v27 */ \
2299 &rs6000_reg_names[105][0], /* v28 */ \
2300 &rs6000_reg_names[106][0], /* v29 */ \
2301 &rs6000_reg_names[107][0], /* v30 */ \
2302 &rs6000_reg_names[108][0], /* v31 */ \
2303 &rs6000_reg_names[109][0], /* vrsave */ \
2304 &rs6000_reg_names[110][0], /* vscr */ \
2305 &rs6000_reg_names[111][0], /* spe_acc */ \
2306 &rs6000_reg_names[112][0], /* spefscr */ \
2307 &rs6000_reg_names[113][0], /* sfp */ \
2310 /* Table of additional register names to use in user input. */
2312 #define ADDITIONAL_REGISTER_NAMES \
2313 {{"r0", 0}, {"r1", 1}, {"r2", 2}, {"r3", 3}, \
2314 {"r4", 4}, {"r5", 5}, {"r6", 6}, {"r7", 7}, \
2315 {"r8", 8}, {"r9", 9}, {"r10", 10}, {"r11", 11}, \
2316 {"r12", 12}, {"r13", 13}, {"r14", 14}, {"r15", 15}, \
2317 {"r16", 16}, {"r17", 17}, {"r18", 18}, {"r19", 19}, \
2318 {"r20", 20}, {"r21", 21}, {"r22", 22}, {"r23", 23}, \
2319 {"r24", 24}, {"r25", 25}, {"r26", 26}, {"r27", 27}, \
2320 {"r28", 28}, {"r29", 29}, {"r30", 30}, {"r31", 31}, \
2321 {"fr0", 32}, {"fr1", 33}, {"fr2", 34}, {"fr3", 35}, \
2322 {"fr4", 36}, {"fr5", 37}, {"fr6", 38}, {"fr7", 39}, \
2323 {"fr8", 40}, {"fr9", 41}, {"fr10", 42}, {"fr11", 43}, \
2324 {"fr12", 44}, {"fr13", 45}, {"fr14", 46}, {"fr15", 47}, \
2325 {"fr16", 48}, {"fr17", 49}, {"fr18", 50}, {"fr19", 51}, \
2326 {"fr20", 52}, {"fr21", 53}, {"fr22", 54}, {"fr23", 55}, \
2327 {"fr24", 56}, {"fr25", 57}, {"fr26", 58}, {"fr27", 59}, \
2328 {"fr28", 60}, {"fr29", 61}, {"fr30", 62}, {"fr31", 63}, \
2329 {"v0", 77}, {"v1", 78}, {"v2", 79}, {"v3", 80}, \
2330 {"v4", 81}, {"v5", 82}, {"v6", 83}, {"v7", 84}, \
2331 {"v8", 85}, {"v9", 86}, {"v10", 87}, {"v11", 88}, \
2332 {"v12", 89}, {"v13", 90}, {"v14", 91}, {"v15", 92}, \
2333 {"v16", 93}, {"v17", 94}, {"v18", 95}, {"v19", 96}, \
2334 {"v20", 97}, {"v21", 98}, {"v22", 99}, {"v23", 100}, \
2335 {"v24", 101},{"v25", 102},{"v26", 103},{"v27", 104}, \
2336 {"v28", 105},{"v29", 106},{"v30", 107},{"v31", 108}, \
2337 {"vrsave", 109}, {"vscr", 110}, \
2338 {"spe_acc", 111}, {"spefscr", 112}, \
2339 /* no additional names for: mq, lr, ctr, ap */ \
2340 {"cr0", 68}, {"cr1", 69}, {"cr2", 70}, {"cr3", 71}, \
2341 {"cr4", 72}, {"cr5", 73}, {"cr6", 74}, {"cr7", 75}, \
2342 {"cc", 68}, {"sp", 1}, {"toc", 2}, \
2343 /* CA is only part of XER, but we do not model the other parts (yet). */ \
2345 /* VSX registers overlaid on top of FR, Altivec registers */ \
2346 {"vs0", 32}, {"vs1", 33}, {"vs2", 34}, {"vs3", 35}, \
2347 {"vs4", 36}, {"vs5", 37}, {"vs6", 38}, {"vs7", 39}, \
2348 {"vs8", 40}, {"vs9", 41}, {"vs10", 42}, {"vs11", 43}, \
2349 {"vs12", 44}, {"vs13", 45}, {"vs14", 46}, {"vs15", 47}, \
2350 {"vs16", 48}, {"vs17", 49}, {"vs18", 50}, {"vs19", 51}, \
2351 {"vs20", 52}, {"vs21", 53}, {"vs22", 54}, {"vs23", 55}, \
2352 {"vs24", 56}, {"vs25", 57}, {"vs26", 58}, {"vs27", 59}, \
2353 {"vs28", 60}, {"vs29", 61}, {"vs30", 62}, {"vs31", 63}, \
2354 {"vs32", 77}, {"vs33", 78}, {"vs34", 79}, {"vs35", 80}, \
2355 {"vs36", 81}, {"vs37", 82}, {"vs38", 83}, {"vs39", 84}, \
2356 {"vs40", 85}, {"vs41", 86}, {"vs42", 87}, {"vs43", 88}, \
2357 {"vs44", 89}, {"vs45", 90}, {"vs46", 91}, {"vs47", 92}, \
2358 {"vs48", 93}, {"vs49", 94}, {"vs50", 95}, {"vs51", 96}, \
2359 {"vs52", 97}, {"vs53", 98}, {"vs54", 99}, {"vs55", 100}, \
2360 {"vs56", 101},{"vs57", 102},{"vs58", 103},{"vs59", 104}, \
2361 {"vs60", 105},{"vs61", 106},{"vs62", 107},{"vs63", 108} }
2363 /* Text to write out after a CALL that may be replaced by glue code by
2364 the loader. This depends on the AIX version. */
2365 #define RS6000_CALL_GLUE "cror 31,31,31"
2367 /* This is how to output an element of a case-vector that is relative. */
2369 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
2370 do { char buf[100]; \
2371 fputs ("\t.long ", FILE); \
2372 ASM_GENERATE_INTERNAL_LABEL (buf, "L", VALUE); \
2373 assemble_name (FILE, buf); \
2375 ASM_GENERATE_INTERNAL_LABEL (buf, "L", REL); \
2376 assemble_name (FILE, buf); \
2377 putc ('\n', FILE); \
2380 /* This is how to output an assembler line
2381 that says to advance the location counter
2382 to a multiple of 2**LOG bytes. */
2384 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
2386 fprintf (FILE, "\t.align %d\n", (LOG))
2388 /* Pick up the return address upon entry to a procedure. Used for
2389 dwarf2 unwind information. This also enables the table driven
2392 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, LR_REGNO)
2393 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (LR_REGNO)
2395 /* Describe how we implement __builtin_eh_return. */
2396 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 3 : INVALID_REGNUM)
2397 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, 10)
2399 /* Print operand X (an rtx) in assembler syntax to file FILE.
2400 CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
2401 For `%' followed by punctuation, CODE is the punctuation and X is null. */
2403 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
2405 /* Define which CODE values are valid. */
2407 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
2408 ((CODE) == '.' || (CODE) == '&')
2410 /* Print a memory address as an operand to reference that memory location. */
2412 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
2414 /* uncomment for disabling the corresponding default options */
2415 /* #define MACHINE_no_sched_interblock */
2416 /* #define MACHINE_no_sched_speculative */
2417 /* #define MACHINE_no_sched_speculative_load */
2419 /* General flags. */
2420 extern int frame_pointer_needed;
2422 /* Classification of the builtin functions to properly set the declaration tree
2426 RS6000_BTC_MISC, /* assume builtin can do anything */
2427 RS6000_BTC_CONST, /* builtin is a 'const' function. */
2428 RS6000_BTC_PURE, /* builtin is a 'pure' function. */
2429 RS6000_BTC_FP_PURE /* builtin is 'pure' if rounding math. */
2432 /* Convenience macros to document the instruction type. */
2433 #define RS6000_BTC_MEM RS6000_BTC_MISC /* load/store touches memory */
2434 #define RS6000_BTC_SAT RS6000_BTC_MISC /* VMX saturate sets VSCR register */
2436 #undef RS6000_BUILTIN
2437 #undef RS6000_BUILTIN_EQUATE
2438 #define RS6000_BUILTIN(NAME, TYPE) NAME,
2439 #define RS6000_BUILTIN_EQUATE(NAME, VALUE) NAME = VALUE,
2441 enum rs6000_builtins
2443 #include "rs6000-builtin.def"
2445 RS6000_BUILTIN_COUNT
2448 #undef RS6000_BUILTIN
2449 #undef RS6000_BUILTIN_EQUATE
2451 enum rs6000_builtin_type_index
2453 RS6000_BTI_NOT_OPAQUE,
2454 RS6000_BTI_opaque_V2SI,
2455 RS6000_BTI_opaque_V2SF,
2456 RS6000_BTI_opaque_p_V2SI,
2457 RS6000_BTI_opaque_V4SI,
2467 RS6000_BTI_unsigned_V16QI,
2468 RS6000_BTI_unsigned_V8HI,
2469 RS6000_BTI_unsigned_V4SI,
2470 RS6000_BTI_unsigned_V2DI,
2471 RS6000_BTI_bool_char, /* __bool char */
2472 RS6000_BTI_bool_short, /* __bool short */
2473 RS6000_BTI_bool_int, /* __bool int */
2474 RS6000_BTI_bool_long, /* __bool long */
2475 RS6000_BTI_pixel, /* __pixel */
2476 RS6000_BTI_bool_V16QI, /* __vector __bool char */
2477 RS6000_BTI_bool_V8HI, /* __vector __bool short */
2478 RS6000_BTI_bool_V4SI, /* __vector __bool int */
2479 RS6000_BTI_bool_V2DI, /* __vector __bool long */
2480 RS6000_BTI_pixel_V8HI, /* __vector __pixel */
2481 RS6000_BTI_long, /* long_integer_type_node */
2482 RS6000_BTI_unsigned_long, /* long_unsigned_type_node */
2483 RS6000_BTI_INTQI, /* intQI_type_node */
2484 RS6000_BTI_UINTQI, /* unsigned_intQI_type_node */
2485 RS6000_BTI_INTHI, /* intHI_type_node */
2486 RS6000_BTI_UINTHI, /* unsigned_intHI_type_node */
2487 RS6000_BTI_INTSI, /* intSI_type_node */
2488 RS6000_BTI_UINTSI, /* unsigned_intSI_type_node */
2489 RS6000_BTI_INTDI, /* intDI_type_node */
2490 RS6000_BTI_UINTDI, /* unsigned_intDI_type_node */
2491 RS6000_BTI_float, /* float_type_node */
2492 RS6000_BTI_double, /* double_type_node */
2493 RS6000_BTI_void, /* void_type_node */
2498 #define opaque_V2SI_type_node (rs6000_builtin_types[RS6000_BTI_opaque_V2SI])
2499 #define opaque_V2SF_type_node (rs6000_builtin_types[RS6000_BTI_opaque_V2SF])
2500 #define opaque_p_V2SI_type_node (rs6000_builtin_types[RS6000_BTI_opaque_p_V2SI])
2501 #define opaque_V4SI_type_node (rs6000_builtin_types[RS6000_BTI_opaque_V4SI])
2502 #define V16QI_type_node (rs6000_builtin_types[RS6000_BTI_V16QI])
2503 #define V2DI_type_node (rs6000_builtin_types[RS6000_BTI_V2DI])
2504 #define V2DF_type_node (rs6000_builtin_types[RS6000_BTI_V2DF])
2505 #define V2SI_type_node (rs6000_builtin_types[RS6000_BTI_V2SI])
2506 #define V2SF_type_node (rs6000_builtin_types[RS6000_BTI_V2SF])
2507 #define V4HI_type_node (rs6000_builtin_types[RS6000_BTI_V4HI])
2508 #define V4SI_type_node (rs6000_builtin_types[RS6000_BTI_V4SI])
2509 #define V4SF_type_node (rs6000_builtin_types[RS6000_BTI_V4SF])
2510 #define V8HI_type_node (rs6000_builtin_types[RS6000_BTI_V8HI])
2511 #define unsigned_V16QI_type_node (rs6000_builtin_types[RS6000_BTI_unsigned_V16QI])
2512 #define unsigned_V8HI_type_node (rs6000_builtin_types[RS6000_BTI_unsigned_V8HI])
2513 #define unsigned_V4SI_type_node (rs6000_builtin_types[RS6000_BTI_unsigned_V4SI])
2514 #define unsigned_V2DI_type_node (rs6000_builtin_types[RS6000_BTI_unsigned_V2DI])
2515 #define bool_char_type_node (rs6000_builtin_types[RS6000_BTI_bool_char])
2516 #define bool_short_type_node (rs6000_builtin_types[RS6000_BTI_bool_short])
2517 #define bool_int_type_node (rs6000_builtin_types[RS6000_BTI_bool_int])
2518 #define bool_long_type_node (rs6000_builtin_types[RS6000_BTI_bool_long])
2519 #define pixel_type_node (rs6000_builtin_types[RS6000_BTI_pixel])
2520 #define bool_V16QI_type_node (rs6000_builtin_types[RS6000_BTI_bool_V16QI])
2521 #define bool_V8HI_type_node (rs6000_builtin_types[RS6000_BTI_bool_V8HI])
2522 #define bool_V4SI_type_node (rs6000_builtin_types[RS6000_BTI_bool_V4SI])
2523 #define bool_V2DI_type_node (rs6000_builtin_types[RS6000_BTI_bool_V2DI])
2524 #define pixel_V8HI_type_node (rs6000_builtin_types[RS6000_BTI_pixel_V8HI])
2526 #define long_integer_type_internal_node (rs6000_builtin_types[RS6000_BTI_long])
2527 #define long_unsigned_type_internal_node (rs6000_builtin_types[RS6000_BTI_unsigned_long])
2528 #define intQI_type_internal_node (rs6000_builtin_types[RS6000_BTI_INTQI])
2529 #define uintQI_type_internal_node (rs6000_builtin_types[RS6000_BTI_UINTQI])
2530 #define intHI_type_internal_node (rs6000_builtin_types[RS6000_BTI_INTHI])
2531 #define uintHI_type_internal_node (rs6000_builtin_types[RS6000_BTI_UINTHI])
2532 #define intSI_type_internal_node (rs6000_builtin_types[RS6000_BTI_INTSI])
2533 #define uintSI_type_internal_node (rs6000_builtin_types[RS6000_BTI_UINTSI])
2534 #define intDI_type_internal_node (rs6000_builtin_types[RS6000_BTI_INTDI])
2535 #define uintDI_type_internal_node (rs6000_builtin_types[RS6000_BTI_UINTDI])
2536 #define float_type_internal_node (rs6000_builtin_types[RS6000_BTI_float])
2537 #define double_type_internal_node (rs6000_builtin_types[RS6000_BTI_double])
2538 #define void_type_internal_node (rs6000_builtin_types[RS6000_BTI_void])
2540 extern GTY(()) tree rs6000_builtin_types[RS6000_BTI_MAX];
2541 extern GTY(()) tree rs6000_builtin_decls[RS6000_BUILTIN_COUNT];