1 /* Definitions of target machine for GNU compiler. MIPS version.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
4 Free Software Foundation, Inc.
5 Contributed by A. Lichnewsky (lich@inria.inria.fr).
6 Changed by Michael Meissner (meissner@osf.org).
7 64-bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and
8 Brendan Eich (brendan@microunity.com).
10 This file is part of GCC.
12 GCC is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3, or (at your option)
17 GCC is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with GCC; see the file COPYING3. If not see
24 <http://www.gnu.org/licenses/>. */
27 #include "config/vxworks-dummy.h"
29 /* MIPS external variables defined in mips.c. */
31 /* Which processor to schedule for. Since there is no difference between
32 a R2000 and R3000 in terms of the scheduler, we collapse them into
33 just an R3000. The elements of the enumeration must match exactly
34 the cpu attribute in the mips.md machine description. */
50 PROCESSOR_LOONGSON_2E,
51 PROCESSOR_LOONGSON_2F,
76 /* Costs of various operations on the different architectures. */
78 struct mips_rtx_cost_data
80 unsigned short fp_add;
81 unsigned short fp_mult_sf;
82 unsigned short fp_mult_df;
83 unsigned short fp_div_sf;
84 unsigned short fp_div_df;
85 unsigned short int_mult_si;
86 unsigned short int_mult_di;
87 unsigned short int_div_si;
88 unsigned short int_div_di;
89 unsigned short branch_cost;
90 unsigned short memory_latency;
93 /* Which ABI to use. ABI_32 (original 32, or o32), ABI_N32 (n32),
94 ABI_64 (n64) are all defined by SGI. ABI_O64 is o32 extended
95 to work on a 64-bit machine. */
103 /* Masks that affect tuning.
105 PTF_AVOID_BRANCHLIKELY
106 Set if it is usually not profitable to use branch-likely instructions
107 for this target, typically because the branches are always predicted
108 taken and so incur a large overhead when not taken. */
109 #define PTF_AVOID_BRANCHLIKELY 0x1
111 /* Information about one recognized processor. Defined here for the
112 benefit of TARGET_CPU_CPP_BUILTINS. */
113 struct mips_cpu_info {
114 /* The 'canonical' name of the processor as far as GCC is concerned.
115 It's typically a manufacturer's prefix followed by a numerical
116 designation. It should be lowercase. */
119 /* The internal processor number that most closely matches this
120 entry. Several processors can have the same value, if there's no
121 difference between them from GCC's point of view. */
122 enum processor_type cpu;
124 /* The ISA level that the processor implements. */
127 /* A mask of PTF_* values. */
128 unsigned int tune_flags;
131 /* Enumerates the setting of the -mcode-readable option. */
132 enum mips_code_readable_setting {
138 /* Macros to silence warnings about numbers being signed in traditional
139 C and unsigned in ISO C when compiled on 32-bit hosts. */
141 #define BITMASK_HIGH (((unsigned long)1) << 31) /* 0x80000000 */
142 #define BITMASK_UPPER16 ((unsigned long)0xffff << 16) /* 0xffff0000 */
143 #define BITMASK_LOWER16 ((unsigned long)0xffff) /* 0x0000ffff */
146 /* Run-time compilation parameters selecting different hardware subsets. */
148 /* True if we are generating position-independent VxWorks RTP code. */
149 #define TARGET_RTP_PIC (TARGET_VXWORKS_RTP && flag_pic)
151 /* True if the call patterns should be split into a jalr followed by
152 an instruction to restore $gp. It is only safe to split the load
153 from the call when every use of $gp is explicit. */
155 #define TARGET_SPLIT_CALLS \
156 (TARGET_EXPLICIT_RELOCS && TARGET_CALL_CLOBBERED_GP)
158 /* True if we're generating a form of -mabicalls in which we can use
159 operators like %hi and %lo to refer to locally-binding symbols.
160 We can only do this for -mno-shared, and only then if we can use
161 relocation operations instead of assembly macros. It isn't really
162 worth using absolute sequences for 64-bit symbols because GOT
163 accesses are so much shorter. */
165 #define TARGET_ABSOLUTE_ABICALLS \
168 && TARGET_EXPLICIT_RELOCS \
169 && !ABI_HAS_64BIT_SYMBOLS)
171 /* True if we can optimize sibling calls. For simplicity, we only
172 handle cases in which call_insn_operand will reject invalid
173 sibcall addresses. There are two cases in which this isn't true:
175 - TARGET_MIPS16. call_insn_operand accepts constant addresses
176 but there is no direct jump instruction. It isn't worth
177 using sibling calls in this case anyway; they would usually
178 be longer than normal calls.
180 - TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS. call_insn_operand
181 accepts global constants, but all sibcalls must be indirect. */
182 #define TARGET_SIBCALLS \
183 (!TARGET_MIPS16 && (!TARGET_USE_GOT || TARGET_EXPLICIT_RELOCS))
185 /* True if we need to use a global offset table to access some symbols. */
186 #define TARGET_USE_GOT (TARGET_ABICALLS || TARGET_RTP_PIC)
188 /* True if TARGET_USE_GOT and if $gp is a call-clobbered register. */
189 #define TARGET_CALL_CLOBBERED_GP (TARGET_ABICALLS && TARGET_OLDABI)
191 /* True if TARGET_USE_GOT and if $gp is a call-saved register. */
192 #define TARGET_CALL_SAVED_GP (TARGET_USE_GOT && !TARGET_CALL_CLOBBERED_GP)
194 /* True if indirect calls must use register class PIC_FN_ADDR_REG.
195 This is true for both the PIC and non-PIC VxWorks RTP modes. */
196 #define TARGET_USE_PIC_FN_ADDR_REG (TARGET_ABICALLS || TARGET_VXWORKS_RTP)
198 /* True if .gpword or .gpdword should be used for switch tables.
200 Although GAS does understand .gpdword, the SGI linker mishandles
201 the relocations GAS generates (R_MIPS_GPREL32 followed by R_MIPS_64).
202 We therefore disable GP-relative switch tables for n64 on IRIX targets. */
203 #define TARGET_GPWORD (TARGET_ABICALLS && !(mips_abi == ABI_64 && TARGET_IRIX))
205 /* Generate mips16 code */
206 #define TARGET_MIPS16 ((target_flags & MASK_MIPS16) != 0)
207 /* Generate mips16e code. Default 16bit ASE for mips32* and mips64* */
208 #define GENERATE_MIPS16E (TARGET_MIPS16 && mips_isa >= 32)
209 /* Generate mips16e register save/restore sequences. */
210 #define GENERATE_MIPS16E_SAVE_RESTORE (GENERATE_MIPS16E && mips_abi == ABI_32)
212 /* True if we're generating a form of MIPS16 code in which general
213 text loads are allowed. */
214 #define TARGET_MIPS16_TEXT_LOADS \
215 (TARGET_MIPS16 && mips_code_readable == CODE_READABLE_YES)
217 /* True if we're generating a form of MIPS16 code in which PC-relative
218 loads are allowed. */
219 #define TARGET_MIPS16_PCREL_LOADS \
220 (TARGET_MIPS16 && mips_code_readable >= CODE_READABLE_PCREL)
222 /* Generic ISA defines. */
223 #define ISA_MIPS1 (mips_isa == 1)
224 #define ISA_MIPS2 (mips_isa == 2)
225 #define ISA_MIPS3 (mips_isa == 3)
226 #define ISA_MIPS4 (mips_isa == 4)
227 #define ISA_MIPS32 (mips_isa == 32)
228 #define ISA_MIPS32R2 (mips_isa == 33)
229 #define ISA_MIPS64 (mips_isa == 64)
230 #define ISA_MIPS64R2 (mips_isa == 65)
232 /* Architecture target defines. */
233 #define TARGET_LOONGSON_2E (mips_arch == PROCESSOR_LOONGSON_2E)
234 #define TARGET_LOONGSON_2F (mips_arch == PROCESSOR_LOONGSON_2F)
235 #define TARGET_LOONGSON_2EF (TARGET_LOONGSON_2E || TARGET_LOONGSON_2F)
236 #define TARGET_MIPS3900 (mips_arch == PROCESSOR_R3900)
237 #define TARGET_MIPS4000 (mips_arch == PROCESSOR_R4000)
238 #define TARGET_MIPS4120 (mips_arch == PROCESSOR_R4120)
239 #define TARGET_MIPS4130 (mips_arch == PROCESSOR_R4130)
240 #define TARGET_MIPS5400 (mips_arch == PROCESSOR_R5400)
241 #define TARGET_MIPS5500 (mips_arch == PROCESSOR_R5500)
242 #define TARGET_MIPS7000 (mips_arch == PROCESSOR_R7000)
243 #define TARGET_MIPS9000 (mips_arch == PROCESSOR_R9000)
244 #define TARGET_SB1 (mips_arch == PROCESSOR_SB1 \
245 || mips_arch == PROCESSOR_SB1A)
246 #define TARGET_SR71K (mips_arch == PROCESSOR_SR71000)
248 /* Scheduling target defines. */
249 #define TUNE_20KC (mips_tune == PROCESSOR_20KC)
250 #define TUNE_24K (mips_tune == PROCESSOR_24KC \
251 || mips_tune == PROCESSOR_24KF2_1 \
252 || mips_tune == PROCESSOR_24KF1_1)
253 #define TUNE_74K (mips_tune == PROCESSOR_74KC \
254 || mips_tune == PROCESSOR_74KF2_1 \
255 || mips_tune == PROCESSOR_74KF1_1 \
256 || mips_tune == PROCESSOR_74KF3_2)
257 #define TUNE_LOONGSON_2EF (mips_tune == PROCESSOR_LOONGSON_2E \
258 || mips_tune == PROCESSOR_LOONGSON_2F)
259 #define TUNE_MIPS3000 (mips_tune == PROCESSOR_R3000)
260 #define TUNE_MIPS3900 (mips_tune == PROCESSOR_R3900)
261 #define TUNE_MIPS4000 (mips_tune == PROCESSOR_R4000)
262 #define TUNE_MIPS4120 (mips_tune == PROCESSOR_R4120)
263 #define TUNE_MIPS4130 (mips_tune == PROCESSOR_R4130)
264 #define TUNE_MIPS5000 (mips_tune == PROCESSOR_R5000)
265 #define TUNE_MIPS5400 (mips_tune == PROCESSOR_R5400)
266 #define TUNE_MIPS5500 (mips_tune == PROCESSOR_R5500)
267 #define TUNE_MIPS6000 (mips_tune == PROCESSOR_R6000)
268 #define TUNE_MIPS7000 (mips_tune == PROCESSOR_R7000)
269 #define TUNE_MIPS9000 (mips_tune == PROCESSOR_R9000)
270 #define TUNE_SB1 (mips_tune == PROCESSOR_SB1 \
271 || mips_tune == PROCESSOR_SB1A)
273 /* Whether vector modes and intrinsics for ST Microelectronics
274 Loongson-2E/2F processors should be enabled. In o32 pairs of
275 floating-point registers provide 64-bit values. */
276 #define TARGET_LOONGSON_VECTORS (TARGET_HARD_FLOAT_ABI \
277 && TARGET_LOONGSON_2EF)
279 /* True if the pre-reload scheduler should try to create chains of
280 multiply-add or multiply-subtract instructions. For example,
288 t1 will have a higher priority than t2 and t3 will have a higher
289 priority than t4. However, before reload, there is no dependence
290 between t1 and t3, and they can often have similar priorities.
291 The scheduler will then tend to prefer:
298 which stops us from making full use of macc/madd-style instructions.
299 This sort of situation occurs frequently in Fourier transforms and
302 To counter this, the TUNE_MACC_CHAINS code will reorder the ready
303 queue so that chained multiply-add and multiply-subtract instructions
304 appear ahead of any other instruction that is likely to clobber lo.
305 In the example above, if t2 and t3 become ready at the same time,
306 the code ensures that t2 is scheduled first.
308 Multiply-accumulate instructions are a bigger win for some targets
309 than others, so this macro is defined on an opt-in basis. */
310 #define TUNE_MACC_CHAINS (TUNE_MIPS5500 \
315 #define TARGET_OLDABI (mips_abi == ABI_32 || mips_abi == ABI_O64)
316 #define TARGET_NEWABI (mips_abi == ABI_N32 || mips_abi == ABI_64)
318 /* TARGET_HARD_FLOAT and TARGET_SOFT_FLOAT reflect whether the FPU is
319 directly accessible, while the command-line options select
320 TARGET_HARD_FLOAT_ABI and TARGET_SOFT_FLOAT_ABI to reflect the ABI
322 #define TARGET_HARD_FLOAT (TARGET_HARD_FLOAT_ABI && !TARGET_MIPS16)
323 #define TARGET_SOFT_FLOAT (TARGET_SOFT_FLOAT_ABI || TARGET_MIPS16)
325 /* IRIX specific stuff. */
326 #define TARGET_IRIX 0
327 #define TARGET_IRIX6 0
329 /* Define preprocessor macros for the -march and -mtune options.
330 PREFIX is either _MIPS_ARCH or _MIPS_TUNE, INFO is the selected
331 processor. If INFO's canonical name is "foo", define PREFIX to
332 be "foo", and define an additional macro PREFIX_FOO. */
333 #define MIPS_CPP_SET_PROCESSOR(PREFIX, INFO) \
338 macro = concat ((PREFIX), "_", (INFO)->name, NULL); \
339 for (p = macro; *p != 0; p++) \
342 builtin_define (macro); \
343 builtin_define_with_value ((PREFIX), (INFO)->name, 1); \
348 /* Target CPU builtins. */
349 #define TARGET_CPU_CPP_BUILTINS() \
352 /* Everyone but IRIX defines this to mips. */ \
354 builtin_assert ("machine=mips"); \
356 builtin_assert ("cpu=mips"); \
357 builtin_define ("__mips__"); \
358 builtin_define ("_mips"); \
360 /* We do this here because __mips is defined below and so we \
361 can't use builtin_define_std. We don't ever want to define \
362 "mips" for VxWorks because some of the VxWorks headers \
363 construct include filenames from a root directory macro, \
364 an architecture macro and a filename, where the architecture \
365 macro expands to 'mips'. If we define 'mips' to 1, the \
366 architecture macro expands to 1 as well. */ \
367 if (!flag_iso && !TARGET_VXWORKS) \
368 builtin_define ("mips"); \
371 builtin_define ("__mips64"); \
375 /* Treat _R3000 and _R4000 like register-size \
376 defines, which is how they've historically \
380 builtin_define_std ("R4000"); \
381 builtin_define ("_R4000"); \
385 builtin_define_std ("R3000"); \
386 builtin_define ("_R3000"); \
389 if (TARGET_FLOAT64) \
390 builtin_define ("__mips_fpr=64"); \
392 builtin_define ("__mips_fpr=32"); \
394 if (mips_base_mips16) \
395 builtin_define ("__mips16"); \
398 builtin_define ("__mips3d"); \
400 if (TARGET_SMARTMIPS) \
401 builtin_define ("__mips_smartmips"); \
405 builtin_define ("__mips_dsp"); \
408 builtin_define ("__mips_dspr2"); \
409 builtin_define ("__mips_dsp_rev=2"); \
412 builtin_define ("__mips_dsp_rev=1"); \
415 MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info); \
416 MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info); \
420 builtin_define ("__mips=1"); \
421 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS1"); \
423 else if (ISA_MIPS2) \
425 builtin_define ("__mips=2"); \
426 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS2"); \
428 else if (ISA_MIPS3) \
430 builtin_define ("__mips=3"); \
431 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS3"); \
433 else if (ISA_MIPS4) \
435 builtin_define ("__mips=4"); \
436 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS4"); \
438 else if (ISA_MIPS32) \
440 builtin_define ("__mips=32"); \
441 builtin_define ("__mips_isa_rev=1"); \
442 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \
444 else if (ISA_MIPS32R2) \
446 builtin_define ("__mips=32"); \
447 builtin_define ("__mips_isa_rev=2"); \
448 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \
450 else if (ISA_MIPS64) \
452 builtin_define ("__mips=64"); \
453 builtin_define ("__mips_isa_rev=1"); \
454 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64"); \
456 else if (ISA_MIPS64R2) \
458 builtin_define ("__mips=64"); \
459 builtin_define ("__mips_isa_rev=2"); \
460 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64"); \
466 builtin_define ("_ABIO32=1"); \
467 builtin_define ("_MIPS_SIM=_ABIO32"); \
471 builtin_define ("_ABIN32=2"); \
472 builtin_define ("_MIPS_SIM=_ABIN32"); \
476 builtin_define ("_ABI64=3"); \
477 builtin_define ("_MIPS_SIM=_ABI64"); \
481 builtin_define ("_ABIO64=4"); \
482 builtin_define ("_MIPS_SIM=_ABIO64"); \
486 builtin_define_with_int_value ("_MIPS_SZINT", INT_TYPE_SIZE); \
487 builtin_define_with_int_value ("_MIPS_SZLONG", LONG_TYPE_SIZE); \
488 builtin_define_with_int_value ("_MIPS_SZPTR", POINTER_SIZE); \
489 builtin_define_with_int_value ("_MIPS_FPSET", \
490 32 / MAX_FPRS_PER_FMT); \
492 /* These defines reflect the ABI in use, not whether the \
493 FPU is directly accessible. */ \
494 if (TARGET_HARD_FLOAT_ABI) \
495 builtin_define ("__mips_hard_float"); \
497 builtin_define ("__mips_soft_float"); \
499 if (TARGET_SINGLE_FLOAT) \
500 builtin_define ("__mips_single_float"); \
502 if (TARGET_PAIRED_SINGLE_FLOAT) \
503 builtin_define ("__mips_paired_single_float"); \
505 if (TARGET_BIG_ENDIAN) \
507 builtin_define_std ("MIPSEB"); \
508 builtin_define ("_MIPSEB"); \
512 builtin_define_std ("MIPSEL"); \
513 builtin_define ("_MIPSEL"); \
516 /* Whether Loongson vector modes are enabled. */ \
517 if (TARGET_LOONGSON_VECTORS) \
518 builtin_define ("__mips_loongson_vector_rev"); \
520 /* Macros dependent on the C dialect. */ \
521 if (preprocessing_asm_p ()) \
523 builtin_define_std ("LANGUAGE_ASSEMBLY"); \
524 builtin_define ("_LANGUAGE_ASSEMBLY"); \
526 else if (c_dialect_cxx ()) \
528 builtin_define ("_LANGUAGE_C_PLUS_PLUS"); \
529 builtin_define ("__LANGUAGE_C_PLUS_PLUS"); \
530 builtin_define ("__LANGUAGE_C_PLUS_PLUS__"); \
534 builtin_define_std ("LANGUAGE_C"); \
535 builtin_define ("_LANGUAGE_C"); \
537 if (c_dialect_objc ()) \
539 builtin_define ("_LANGUAGE_OBJECTIVE_C"); \
540 builtin_define ("__LANGUAGE_OBJECTIVE_C"); \
541 /* Bizarre, but needed at least for Irix. */ \
542 builtin_define_std ("LANGUAGE_C"); \
543 builtin_define ("_LANGUAGE_C"); \
546 if (mips_abi == ABI_EABI) \
547 builtin_define ("__mips_eabi"); \
551 /* Default target_flags if no switches are specified */
553 #ifndef TARGET_DEFAULT
554 #define TARGET_DEFAULT 0
557 #ifndef TARGET_CPU_DEFAULT
558 #define TARGET_CPU_DEFAULT 0
561 #ifndef TARGET_ENDIAN_DEFAULT
562 #define TARGET_ENDIAN_DEFAULT MASK_BIG_ENDIAN
565 #ifndef TARGET_FP_EXCEPTIONS_DEFAULT
566 #define TARGET_FP_EXCEPTIONS_DEFAULT MASK_FP_EXCEPTIONS
569 /* 'from-abi' makes a good default: you get whatever the ABI requires. */
570 #ifndef MIPS_ISA_DEFAULT
571 #ifndef MIPS_CPU_STRING_DEFAULT
572 #define MIPS_CPU_STRING_DEFAULT "from-abi"
578 /* Make this compile time constant for libgcc2 */
580 #define TARGET_64BIT 1
582 #define TARGET_64BIT 0
584 #endif /* IN_LIBGCC2 */
586 /* Force the call stack unwinders in unwind.inc not to be MIPS16 code
587 when compiled with hardware floating point. This is because MIPS16
588 code cannot save and restore the floating-point registers, which is
589 important if in a mixed MIPS16/non-MIPS16 environment. */
592 #if __mips_hard_float
593 #define LIBGCC2_UNWIND_ATTRIBUTE __attribute__((__nomips16__))
595 #endif /* IN_LIBGCC2 */
597 #define TARGET_LIBGCC_SDATA_SECTION ".sdata"
599 #ifndef MULTILIB_ENDIAN_DEFAULT
600 #if TARGET_ENDIAN_DEFAULT == 0
601 #define MULTILIB_ENDIAN_DEFAULT "EL"
603 #define MULTILIB_ENDIAN_DEFAULT "EB"
607 #ifndef MULTILIB_ISA_DEFAULT
608 # if MIPS_ISA_DEFAULT == 1
609 # define MULTILIB_ISA_DEFAULT "mips1"
611 # if MIPS_ISA_DEFAULT == 2
612 # define MULTILIB_ISA_DEFAULT "mips2"
614 # if MIPS_ISA_DEFAULT == 3
615 # define MULTILIB_ISA_DEFAULT "mips3"
617 # if MIPS_ISA_DEFAULT == 4
618 # define MULTILIB_ISA_DEFAULT "mips4"
620 # if MIPS_ISA_DEFAULT == 32
621 # define MULTILIB_ISA_DEFAULT "mips32"
623 # if MIPS_ISA_DEFAULT == 33
624 # define MULTILIB_ISA_DEFAULT "mips32r2"
626 # if MIPS_ISA_DEFAULT == 64
627 # define MULTILIB_ISA_DEFAULT "mips64"
629 # if MIPS_ISA_DEFAULT == 65
630 # define MULTILIB_ISA_DEFAULT "mips64r2"
632 # define MULTILIB_ISA_DEFAULT "mips1"
643 #ifndef MULTILIB_DEFAULTS
644 #define MULTILIB_DEFAULTS \
645 { MULTILIB_ENDIAN_DEFAULT, MULTILIB_ISA_DEFAULT, MULTILIB_ABI_DEFAULT }
648 /* We must pass -EL to the linker by default for little endian embedded
649 targets using linker scripts with a OUTPUT_FORMAT line. Otherwise, the
650 linker will default to using big-endian output files. The OUTPUT_FORMAT
651 line must be in the linker script, otherwise -EB/-EL will not work. */
654 #if TARGET_ENDIAN_DEFAULT == 0
655 #define ENDIAN_SPEC "%{!EB:%{!meb:-EL}} %{EB|meb:-EB}"
657 #define ENDIAN_SPEC "%{!EL:%{!mel:-EB}} %{EL|mel:-EL}"
661 /* A spec condition that matches all non-mips16 -mips arguments. */
663 #define MIPS_ISA_LEVEL_OPTION_SPEC \
664 "mips1|mips2|mips3|mips4|mips32*|mips64*"
666 /* A spec condition that matches all non-mips16 architecture arguments. */
668 #define MIPS_ARCH_OPTION_SPEC \
669 MIPS_ISA_LEVEL_OPTION_SPEC "|march=*"
671 /* A spec that infers a -mips argument from an -march argument,
672 or injects the default if no architecture is specified. */
674 #define MIPS_ISA_LEVEL_SPEC \
675 "%{" MIPS_ISA_LEVEL_OPTION_SPEC ":;: \
676 %{march=mips1|march=r2000|march=r3000|march=r3900:-mips1} \
677 %{march=mips2|march=r6000:-mips2} \
678 %{march=mips3|march=r4*|march=vr4*|march=orion|march=loongson2*:-mips3} \
679 %{march=mips4|march=r8000|march=vr5*|march=rm7000|march=rm9000:-mips4} \
680 %{march=mips32|march=4kc|march=4km|march=4kp|march=4ksc:-mips32} \
681 %{march=mips32r2|march=m4k|march=4ke*|march=4ksd|march=24k* \
682 |march=34k*|march=74k*: -mips32r2} \
683 %{march=mips64|march=5k*|march=20k*|march=sb1*|march=sr71000: -mips64} \
684 %{march=mips64r2: -mips64r2} \
685 %{!march=*: -" MULTILIB_ISA_DEFAULT "}}"
687 /* A spec that infers a -mhard-float or -msoft-float setting from an
688 -march argument. Note that soft-float and hard-float code are not
691 #define MIPS_ARCH_FLOAT_SPEC \
692 "%{mhard-float|msoft-float|march=mips*:; \
693 march=vr41*|march=m4k|march=4k*|march=24kc|march=24kec \
694 |march=34kc|march=74kc|march=5kc: -msoft-float; \
695 march=*: -mhard-float}"
697 /* A spec condition that matches 32-bit options. It only works if
698 MIPS_ISA_LEVEL_SPEC has been applied. */
700 #define MIPS_32BIT_OPTION_SPEC \
701 "mips1|mips2|mips32*|mgp32"
703 /* Support for a compile-time default CPU, et cetera. The rules are:
704 --with-arch is ignored if -march is specified or a -mips is specified
705 (other than -mips16).
706 --with-tune is ignored if -mtune is specified.
707 --with-abi is ignored if -mabi is specified.
708 --with-float is ignored if -mhard-float or -msoft-float are
710 --with-divide is ignored if -mdivide-traps or -mdivide-breaks are
712 #define OPTION_DEFAULT_SPECS \
713 {"arch", "%{" MIPS_ARCH_OPTION_SPEC ":;: -march=%(VALUE)}" }, \
714 {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
715 {"abi", "%{!mabi=*:-mabi=%(VALUE)}" }, \
716 {"float", "%{!msoft-float:%{!mhard-float:-m%(VALUE)-float}}" }, \
717 {"divide", "%{!mdivide-traps:%{!mdivide-breaks:-mdivide-%(VALUE)}}" }, \
718 {"llsc", "%{!mllsc:%{!mno-llsc:-m%(VALUE)}}" }
721 #define GENERATE_DIVIDE_TRAPS (TARGET_DIVIDE_TRAPS \
722 && ISA_HAS_COND_TRAP)
724 #define GENERATE_BRANCHLIKELY (TARGET_BRANCHLIKELY && !TARGET_MIPS16)
726 /* True if the ABI can only work with 64-bit integer registers. We
727 generally allow ad-hoc variations for TARGET_SINGLE_FLOAT, but
728 otherwise floating-point registers must also be 64-bit. */
729 #define ABI_NEEDS_64BIT_REGS (TARGET_NEWABI || mips_abi == ABI_O64)
731 /* Likewise for 32-bit regs. */
732 #define ABI_NEEDS_32BIT_REGS (mips_abi == ABI_32)
734 /* True if symbols are 64 bits wide. At present, n64 is the only
735 ABI for which this is true. */
736 #define ABI_HAS_64BIT_SYMBOLS (mips_abi == ABI_64 && !TARGET_SYM32)
738 /* ISA has instructions for managing 64-bit fp and gp regs (e.g. mips3). */
739 #define ISA_HAS_64BIT_REGS (ISA_MIPS3 \
744 /* ISA has branch likely instructions (e.g. mips2). */
745 /* Disable branchlikely for tx39 until compare rewrite. They haven't
746 been generated up to this point. */
747 #define ISA_HAS_BRANCHLIKELY (!ISA_MIPS1)
749 /* ISA has a three-operand multiplication instruction (usually spelt "mul"). */
750 #define ISA_HAS_MUL3 ((TARGET_MIPS3900 \
762 /* ISA has the floating-point conditional move instructions introduced
764 #define ISA_HAS_FP_CONDMOVE ((ISA_MIPS4 \
769 && !TARGET_MIPS5500 \
772 /* ISA has the integer conditional move instructions introduced in mips4 and
773 ST Loongson 2E/2F. */
774 #define ISA_HAS_CONDMOVE (ISA_HAS_FP_CONDMOVE || TARGET_LOONGSON_2EF)
776 /* ISA has LDC1 and SDC1. */
777 #define ISA_HAS_LDC1_SDC1 (!ISA_MIPS1 && !TARGET_MIPS16)
779 /* ISA has the mips4 FP condition code instructions: FP-compare to CC,
780 branch on CC, and move (both FP and non-FP) on CC. */
781 #define ISA_HAS_8CC (ISA_MIPS4 \
787 /* This is a catch all for other mips4 instructions: indexed load, the
788 FP madd and msub instructions, and the FP recip and recip sqrt
790 #define ISA_HAS_FP4 ((ISA_MIPS4 \
791 || (ISA_MIPS32R2 && TARGET_FLOAT64) \
796 /* ISA has paired-single instructions. */
797 #define ISA_HAS_PAIRED_SINGLE (ISA_MIPS32R2 || ISA_MIPS64 || ISA_MIPS64R2)
799 /* ISA has conditional trap instructions. */
800 #define ISA_HAS_COND_TRAP (!ISA_MIPS1 \
803 /* ISA has integer multiply-accumulate instructions, madd and msub. */
804 #define ISA_HAS_MADD_MSUB ((ISA_MIPS32 \
810 /* Integer multiply-accumulate instructions should be generated. */
811 #define GENERATE_MADD_MSUB (ISA_HAS_MADD_MSUB && !TUNE_74K)
813 /* ISA has floating-point madd and msub instructions 'd = a * b [+-] c'. */
814 #define ISA_HAS_FP_MADD4_MSUB4 ISA_HAS_FP4
816 /* ISA has floating-point madd and msub instructions 'c = a * b [+-] c'. */
817 #define ISA_HAS_FP_MADD3_MSUB3 TARGET_LOONGSON_2EF
819 /* ISA has floating-point nmadd and nmsub instructions
820 'd = -((a * b) [+-] c)'. */
821 #define ISA_HAS_NMADD4_NMSUB4(MODE) \
823 || (ISA_MIPS32R2 && (MODE) == V2SFmode) \
826 && (!TARGET_MIPS5400 || TARGET_MAD) \
829 /* ISA has floating-point nmadd and nmsub instructions
830 'c = -((a * b) [+-] c)'. */
831 #define ISA_HAS_NMADD3_NMSUB3(MODE) \
834 /* ISA has count leading zeroes/ones instruction (not implemented). */
835 #define ISA_HAS_CLZ_CLO ((ISA_MIPS32 \
841 /* ISA has three operand multiply instructions that put
842 the high part in an accumulator: mulhi or mulhiu. */
843 #define ISA_HAS_MULHI ((TARGET_MIPS5400 \
848 /* ISA has three operand multiply instructions that
849 negates the result and puts the result in an accumulator. */
850 #define ISA_HAS_MULS ((TARGET_MIPS5400 \
855 /* ISA has three operand multiply instructions that subtracts the
856 result from a 4th operand and puts the result in an accumulator. */
857 #define ISA_HAS_MSAC ((TARGET_MIPS5400 \
862 /* ISA has three operand multiply instructions that the result
863 from a 4th operand and puts the result in an accumulator. */
864 #define ISA_HAS_MACC ((TARGET_MIPS4120 \
871 /* ISA has NEC VR-style MACC, MACCHI, DMACC and DMACCHI instructions. */
872 #define ISA_HAS_MACCHI ((TARGET_MIPS4120 \
873 || TARGET_MIPS4130) \
876 /* ISA has the "ror" (rotate right) instructions. */
877 #define ISA_HAS_ROR ((ISA_MIPS32R2 \
882 || TARGET_SMARTMIPS) \
885 /* ISA has data prefetch instructions. This controls use of 'pref'. */
886 #define ISA_HAS_PREFETCH ((ISA_MIPS4 \
893 /* ISA has data indexed prefetch instructions. This controls use of
894 'prefx', along with TARGET_HARD_FLOAT and TARGET_DOUBLE_FLOAT.
895 (prefx is a cop1x instruction, so can only be used if FP is
897 #define ISA_HAS_PREFETCHX ((ISA_MIPS4 \
903 /* True if trunc.w.s and trunc.w.d are real (not synthetic)
904 instructions. Both require TARGET_HARD_FLOAT, and trunc.w.d
905 also requires TARGET_DOUBLE_FLOAT. */
906 #define ISA_HAS_TRUNC_W (!ISA_MIPS1)
908 /* ISA includes the MIPS32r2 seb and seh instructions. */
909 #define ISA_HAS_SEB_SEH ((ISA_MIPS32R2 \
913 /* ISA includes the MIPS32/64 rev 2 ext and ins instructions. */
914 #define ISA_HAS_EXT_INS ((ISA_MIPS32R2 \
918 /* ISA has instructions for accessing top part of 64-bit fp regs. */
919 #define ISA_HAS_MXHC1 (TARGET_FLOAT64 \
923 /* ISA has lwxs instruction (load w/scaled index address. */
924 #define ISA_HAS_LWXS (TARGET_SMARTMIPS && !TARGET_MIPS16)
926 /* The DSP ASE is available. */
927 #define ISA_HAS_DSP (TARGET_DSP && !TARGET_MIPS16)
929 /* Revision 2 of the DSP ASE is available. */
930 #define ISA_HAS_DSPR2 (TARGET_DSPR2 && !TARGET_MIPS16)
932 /* True if the result of a load is not available to the next instruction.
933 A nop will then be needed between instructions like "lw $4,..."
934 and "addiu $4,$4,1". */
935 #define ISA_HAS_LOAD_DELAY (ISA_MIPS1 \
936 && !TARGET_MIPS3900 \
939 /* Likewise mtc1 and mfc1. */
940 #define ISA_HAS_XFER_DELAY (mips_isa <= 3 \
941 && !TARGET_LOONGSON_2EF)
943 /* Likewise floating-point comparisons. */
944 #define ISA_HAS_FCMP_DELAY (mips_isa <= 3 \
945 && !TARGET_LOONGSON_2EF)
947 /* True if mflo and mfhi can be immediately followed by instructions
948 which write to the HI and LO registers.
950 According to MIPS specifications, MIPS ISAs I, II, and III need
951 (at least) two instructions between the reads of HI/LO and
952 instructions which write them, and later ISAs do not. Contradicting
953 the MIPS specifications, some MIPS IV processor user manuals (e.g.
954 the UM for the NEC Vr5000) document needing the instructions between
955 HI/LO reads and writes, as well. Therefore, we declare only MIPS32,
956 MIPS64 and later ISAs to have the interlocks, plus any specific
957 earlier-ISA CPUs for which CPU documentation declares that the
958 instructions are really interlocked. */
959 #define ISA_HAS_HILO_INTERLOCKS (ISA_MIPS32 \
964 || TARGET_LOONGSON_2EF)
966 /* ISA includes synci, jr.hb and jalr.hb. */
967 #define ISA_HAS_SYNCI ((ISA_MIPS32R2 \
971 /* ISA includes sync. */
972 #define ISA_HAS_SYNC ((mips_isa >= 2 || TARGET_MIPS3900) && !TARGET_MIPS16)
973 #define GENERATE_SYNC \
974 (target_flags_explicit & MASK_LLSC \
975 ? TARGET_LLSC && !TARGET_MIPS16 \
978 /* ISA includes ll and sc. Note that this implies ISA_HAS_SYNC
979 because the expanders use both ISA_HAS_SYNC and ISA_HAS_LL_SC
981 #define ISA_HAS_LL_SC (mips_isa >= 2 && !TARGET_MIPS16)
982 #define GENERATE_LL_SC \
983 (target_flags_explicit & MASK_LLSC \
984 ? TARGET_LLSC && !TARGET_MIPS16 \
987 /* Add -G xx support. */
989 #undef SWITCH_TAKES_ARG
990 #define SWITCH_TAKES_ARG(CHAR) \
991 (DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G')
993 #define OVERRIDE_OPTIONS mips_override_options ()
995 #define CONDITIONAL_REGISTER_USAGE mips_conditional_register_usage ()
997 /* Show we can debug even without a frame pointer. */
998 #define CAN_DEBUG_WITHOUT_FP
1000 /* Tell collect what flags to pass to nm. */
1002 #define NM_FLAGS "-Bn"
1006 #ifndef MIPS_ABI_DEFAULT
1007 #define MIPS_ABI_DEFAULT ABI_32
1010 /* Use the most portable ABI flag for the ASM specs. */
1012 #if MIPS_ABI_DEFAULT == ABI_32
1013 #define MULTILIB_ABI_DEFAULT "mabi=32"
1016 #if MIPS_ABI_DEFAULT == ABI_O64
1017 #define MULTILIB_ABI_DEFAULT "mabi=o64"
1020 #if MIPS_ABI_DEFAULT == ABI_N32
1021 #define MULTILIB_ABI_DEFAULT "mabi=n32"
1024 #if MIPS_ABI_DEFAULT == ABI_64
1025 #define MULTILIB_ABI_DEFAULT "mabi=64"
1028 #if MIPS_ABI_DEFAULT == ABI_EABI
1029 #define MULTILIB_ABI_DEFAULT "mabi=eabi"
1032 /* SUBTARGET_ASM_OPTIMIZING_SPEC handles passing optimization options
1033 to the assembler. It may be overridden by subtargets. */
1034 #ifndef SUBTARGET_ASM_OPTIMIZING_SPEC
1035 #define SUBTARGET_ASM_OPTIMIZING_SPEC "\
1037 %{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}}"
1040 /* SUBTARGET_ASM_DEBUGGING_SPEC handles passing debugging options to
1041 the assembler. It may be overridden by subtargets.
1043 Beginning with gas 2.13, -mdebug must be passed to correctly handle
1044 COFF debugging info. */
1046 #ifndef SUBTARGET_ASM_DEBUGGING_SPEC
1047 #define SUBTARGET_ASM_DEBUGGING_SPEC "\
1048 %{g} %{g0} %{g1} %{g2} %{g3} \
1049 %{ggdb:-g} %{ggdb0:-g0} %{ggdb1:-g1} %{ggdb2:-g2} %{ggdb3:-g3} \
1050 %{gstabs:-g} %{gstabs0:-g0} %{gstabs1:-g1} %{gstabs2:-g2} %{gstabs3:-g3} \
1051 %{gstabs+:-g} %{gstabs+0:-g0} %{gstabs+1:-g1} %{gstabs+2:-g2} %{gstabs+3:-g3} \
1052 %{gcoff:-g} %{gcoff0:-g0} %{gcoff1:-g1} %{gcoff2:-g2} %{gcoff3:-g3} \
1053 %{gcoff*:-mdebug} %{!gcoff*:-no-mdebug}"
1056 /* SUBTARGET_ASM_SPEC is always passed to the assembler. It may be
1057 overridden by subtargets. */
1059 #ifndef SUBTARGET_ASM_SPEC
1060 #define SUBTARGET_ASM_SPEC ""
1065 %{G*} %(endian_spec) %{mips1} %{mips2} %{mips3} %{mips4} \
1066 %{mips32*} %{mips64*} \
1067 %{mips16} %{mno-mips16:-no-mips16} \
1068 %{mips3d} %{mno-mips3d:-no-mips3d} \
1069 %{mdmx} %{mno-mdmx:-no-mdmx} \
1070 %{mdsp} %{mno-dsp} \
1071 %{mdspr2} %{mno-dspr2} \
1072 %{msmartmips} %{mno-smartmips} \
1074 %{mfix-vr4120} %{mfix-vr4130} \
1075 %(subtarget_asm_optimizing_spec) \
1076 %(subtarget_asm_debugging_spec) \
1077 %{mabi=*} %{!mabi*: %(asm_abi_default_spec)} \
1078 %{mgp32} %{mgp64} %{march=*} %{mxgot:-xgot} \
1080 %{mshared} %{mno-shared} \
1081 %{msym32} %{mno-sym32} \
1083 %(subtarget_asm_spec)"
1085 /* Extra switches sometimes passed to the linker. */
1086 /* ??? The bestGnum will never be passed to the linker, because the gcc driver
1087 will interpret it as a -b option. */
1090 #define LINK_SPEC "\
1092 %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32*} %{mips64*} \
1093 %{bestGnum} %{shared} %{non_shared}"
1094 #endif /* LINK_SPEC defined */
1097 /* Specs for the compiler proper */
1099 /* SUBTARGET_CC1_SPEC is passed to the compiler proper. It may be
1100 overridden by subtargets. */
1101 #ifndef SUBTARGET_CC1_SPEC
1102 #define SUBTARGET_CC1_SPEC ""
1105 /* CC1_SPEC is the set of arguments to pass to the compiler proper. */
1109 %{gline:%{!g:%{!g0:%{!g1:%{!g2: -g1}}}}} \
1110 %{G*} %{EB:-meb} %{EL:-mel} %{EB:%{EL:%emay not use both -EB and -EL}} \
1112 %(subtarget_cc1_spec)"
1114 /* Preprocessor specs. */
1116 /* SUBTARGET_CPP_SPEC is passed to the preprocessor. It may be
1117 overridden by subtargets. */
1118 #ifndef SUBTARGET_CPP_SPEC
1119 #define SUBTARGET_CPP_SPEC ""
1122 #define CPP_SPEC "%(subtarget_cpp_spec)"
1124 /* This macro defines names of additional specifications to put in the specs
1125 that can be used in various specifications like CC1_SPEC. Its definition
1126 is an initializer with a subgrouping for each command option.
1128 Each subgrouping contains a string constant, that defines the
1129 specification name, and a string constant that used by the GCC driver
1132 Do not define this macro if it does not need to do anything. */
1134 #define EXTRA_SPECS \
1135 { "subtarget_cc1_spec", SUBTARGET_CC1_SPEC }, \
1136 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \
1137 { "subtarget_asm_optimizing_spec", SUBTARGET_ASM_OPTIMIZING_SPEC }, \
1138 { "subtarget_asm_debugging_spec", SUBTARGET_ASM_DEBUGGING_SPEC }, \
1139 { "subtarget_asm_spec", SUBTARGET_ASM_SPEC }, \
1140 { "asm_abi_default_spec", "-" MULTILIB_ABI_DEFAULT }, \
1141 { "endian_spec", ENDIAN_SPEC }, \
1142 SUBTARGET_EXTRA_SPECS
1144 #ifndef SUBTARGET_EXTRA_SPECS
1145 #define SUBTARGET_EXTRA_SPECS
1148 #define DBX_DEBUGGING_INFO 1 /* generate stabs (OSF/rose) */
1149 #define DWARF2_DEBUGGING_INFO 1 /* dwarf2 debugging info */
1151 #ifndef PREFERRED_DEBUGGING_TYPE
1152 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
1155 #define DWARF2_ADDR_SIZE (ABI_HAS_64BIT_SYMBOLS ? 8 : 4)
1157 /* By default, turn on GDB extensions. */
1158 #define DEFAULT_GDB_EXTENSIONS 1
1160 /* Local compiler-generated symbols must have a prefix that the assembler
1161 understands. By default, this is $, although some targets (e.g.,
1162 NetBSD-ELF) need to override this. */
1164 #ifndef LOCAL_LABEL_PREFIX
1165 #define LOCAL_LABEL_PREFIX "$"
1168 /* By default on the mips, external symbols do not have an underscore
1169 prepended, but some targets (e.g., NetBSD) require this. */
1171 #ifndef USER_LABEL_PREFIX
1172 #define USER_LABEL_PREFIX ""
1175 /* On Sun 4, this limit is 2048. We use 1500 to be safe,
1176 since the length can run past this up to a continuation point. */
1177 #undef DBX_CONTIN_LENGTH
1178 #define DBX_CONTIN_LENGTH 1500
1180 /* How to renumber registers for dbx and gdb. */
1181 #define DBX_REGISTER_NUMBER(REGNO) mips_dbx_regno[REGNO]
1183 /* The mapping from gcc register number to DWARF 2 CFA column number. */
1184 #define DWARF_FRAME_REGNUM(REGNO) mips_dwarf_regno[REGNO]
1186 /* The DWARF 2 CFA column which tracks the return address. */
1187 #define DWARF_FRAME_RETURN_COLUMN (GP_REG_FIRST + 31)
1189 /* Before the prologue, RA lives in r31. */
1190 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, GP_REG_FIRST + 31)
1192 /* Describe how we implement __builtin_eh_return. */
1193 #define EH_RETURN_DATA_REGNO(N) \
1194 ((N) < (TARGET_MIPS16 ? 2 : 4) ? (N) + GP_ARG_FIRST : INVALID_REGNUM)
1196 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, GP_REG_FIRST + 3)
1198 /* Offsets recorded in opcodes are a multiple of this alignment factor.
1199 The default for this in 64-bit mode is 8, which causes problems with
1200 SFmode register saves. */
1201 #define DWARF_CIE_DATA_ALIGNMENT -4
1203 /* Correct the offset of automatic variables and arguments. Note that
1204 the MIPS debug format wants all automatic variables and arguments
1205 to be in terms of the virtual frame pointer (stack pointer before
1206 any adjustment in the function), while the MIPS 3.0 linker wants
1207 the frame pointer to be the stack pointer after the initial
1210 #define DEBUGGER_AUTO_OFFSET(X) \
1211 mips_debugger_offset (X, (HOST_WIDE_INT) 0)
1212 #define DEBUGGER_ARG_OFFSET(OFFSET, X) \
1213 mips_debugger_offset (X, (HOST_WIDE_INT) OFFSET)
1215 /* Target machine storage layout */
1217 #define BITS_BIG_ENDIAN 0
1218 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
1219 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
1221 /* Define this to set the endianness to use in libgcc2.c, which can
1222 not depend on target_flags. */
1223 #if !defined(MIPSEL) && !defined(__MIPSEL__)
1224 #define LIBGCC2_WORDS_BIG_ENDIAN 1
1226 #define LIBGCC2_WORDS_BIG_ENDIAN 0
1229 #define MAX_BITS_PER_WORD 64
1231 /* Width of a word, in units (bytes). */
1232 #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
1234 #define MIN_UNITS_PER_WORD 4
1237 /* For MIPS, width of a floating point register. */
1238 #define UNITS_PER_FPREG (TARGET_FLOAT64 ? 8 : 4)
1240 /* The number of consecutive floating-point registers needed to store the
1241 largest format supported by the FPU. */
1242 #define MAX_FPRS_PER_FMT (TARGET_FLOAT64 || TARGET_SINGLE_FLOAT ? 1 : 2)
1244 /* The number of consecutive floating-point registers needed to store the
1245 smallest format supported by the FPU. */
1246 #define MIN_FPRS_PER_FMT \
1247 (ISA_MIPS32 || ISA_MIPS32R2 || ISA_MIPS64 || ISA_MIPS64R2 \
1248 ? 1 : MAX_FPRS_PER_FMT)
1250 /* The largest size of value that can be held in floating-point
1251 registers and moved with a single instruction. */
1252 #define UNITS_PER_HWFPVALUE \
1253 (TARGET_SOFT_FLOAT_ABI ? 0 : MAX_FPRS_PER_FMT * UNITS_PER_FPREG)
1255 /* The largest size of value that can be held in floating-point
1257 #define UNITS_PER_FPVALUE \
1258 (TARGET_SOFT_FLOAT_ABI ? 0 \
1259 : TARGET_SINGLE_FLOAT ? UNITS_PER_FPREG \
1260 : LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT)
1262 /* The number of bytes in a double. */
1263 #define UNITS_PER_DOUBLE (TYPE_PRECISION (double_type_node) / BITS_PER_UNIT)
1265 #define UNITS_PER_SIMD_WORD(MODE) \
1266 (TARGET_PAIRED_SINGLE_FLOAT ? 8 : UNITS_PER_WORD)
1268 /* Set the sizes of the core types. */
1269 #define SHORT_TYPE_SIZE 16
1270 #define INT_TYPE_SIZE 32
1271 #define LONG_TYPE_SIZE (TARGET_LONG64 ? 64 : 32)
1272 #define LONG_LONG_TYPE_SIZE 64
1274 #define FLOAT_TYPE_SIZE 32
1275 #define DOUBLE_TYPE_SIZE 64
1276 #define LONG_DOUBLE_TYPE_SIZE (TARGET_NEWABI ? 128 : 64)
1278 /* Define the sizes of fixed-point types. */
1279 #define SHORT_FRACT_TYPE_SIZE 8
1280 #define FRACT_TYPE_SIZE 16
1281 #define LONG_FRACT_TYPE_SIZE 32
1282 #define LONG_LONG_FRACT_TYPE_SIZE 64
1284 #define SHORT_ACCUM_TYPE_SIZE 16
1285 #define ACCUM_TYPE_SIZE 32
1286 #define LONG_ACCUM_TYPE_SIZE 64
1287 /* FIXME. LONG_LONG_ACCUM_TYPE_SIZE should be 128 bits, but GCC
1288 doesn't support 128-bit integers for MIPS32 currently. */
1289 #define LONG_LONG_ACCUM_TYPE_SIZE (TARGET_64BIT ? 128 : 64)
1291 /* long double is not a fixed mode, but the idea is that, if we
1292 support long double, we also want a 128-bit integer type. */
1293 #define MAX_FIXED_MODE_SIZE LONG_DOUBLE_TYPE_SIZE
1296 #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
1297 || (defined _ABI64 && _MIPS_SIM == _ABI64)
1298 # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
1300 # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
1304 /* Width in bits of a pointer. */
1305 #ifndef POINTER_SIZE
1306 #define POINTER_SIZE ((TARGET_LONG64 && TARGET_64BIT) ? 64 : 32)
1309 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
1310 #define PARM_BOUNDARY BITS_PER_WORD
1312 /* Allocation boundary (in *bits*) for the code of a function. */
1313 #define FUNCTION_BOUNDARY 32
1315 /* Alignment of field after `int : 0' in a structure. */
1316 #define EMPTY_FIELD_BOUNDARY 32
1318 /* Every structure's size must be a multiple of this. */
1319 /* 8 is observed right on a DECstation and on riscos 4.02. */
1320 #define STRUCTURE_SIZE_BOUNDARY 8
1322 /* There is no point aligning anything to a rounder boundary than this. */
1323 #define BIGGEST_ALIGNMENT LONG_DOUBLE_TYPE_SIZE
1325 /* All accesses must be aligned. */
1326 #define STRICT_ALIGNMENT 1
1328 /* Define this if you wish to imitate the way many other C compilers
1329 handle alignment of bitfields and the structures that contain
1332 The behavior is that the type written for a bit-field (`int',
1333 `short', or other integer type) imposes an alignment for the
1334 entire structure, as if the structure really did contain an
1335 ordinary field of that type. In addition, the bit-field is placed
1336 within the structure so that it would fit within such a field,
1337 not crossing a boundary for it.
1339 Thus, on most machines, a bit-field whose type is written as `int'
1340 would not cross a four-byte boundary, and would force four-byte
1341 alignment for the whole structure. (The alignment used may not
1342 be four bytes; it is controlled by the other alignment
1345 If the macro is defined, its definition should be a C expression;
1346 a nonzero value for the expression enables this behavior. */
1348 #define PCC_BITFIELD_TYPE_MATTERS 1
1350 /* If defined, a C expression to compute the alignment given to a
1351 constant that is being placed in memory. CONSTANT is the constant
1352 and ALIGN is the alignment that the object would ordinarily have.
1353 The value of this macro is used instead of that alignment to align
1356 If this macro is not defined, then ALIGN is used.
1358 The typical use of this macro is to increase alignment for string
1359 constants to be word aligned so that `strcpy' calls that copy
1360 constants can be done inline. */
1362 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
1363 ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \
1364 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
1366 /* If defined, a C expression to compute the alignment for a static
1367 variable. TYPE is the data type, and ALIGN is the alignment that
1368 the object would ordinarily have. The value of this macro is used
1369 instead of that alignment to align the object.
1371 If this macro is not defined, then ALIGN is used.
1373 One use of this macro is to increase alignment of medium-size
1374 data to make it all fit in fewer cache lines. Another is to
1375 cause character arrays to be word-aligned so that `strcpy' calls
1376 that copy constants to character arrays can be done inline. */
1378 #undef DATA_ALIGNMENT
1379 #define DATA_ALIGNMENT(TYPE, ALIGN) \
1380 ((((ALIGN) < BITS_PER_WORD) \
1381 && (TREE_CODE (TYPE) == ARRAY_TYPE \
1382 || TREE_CODE (TYPE) == UNION_TYPE \
1383 || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
1385 /* We need this for the same reason as DATA_ALIGNMENT, namely to cause
1386 character arrays to be word-aligned so that `strcpy' calls that copy
1387 constants to character arrays can be done inline, and 'strcmp' can be
1388 optimised to use word loads. */
1389 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \
1390 DATA_ALIGNMENT (TYPE, ALIGN)
1392 #define PAD_VARARGS_DOWN \
1393 (FUNCTION_ARG_PADDING (TYPE_MODE (type), type) == downward)
1395 /* Define if operations between registers always perform the operation
1396 on the full register even if a narrower mode is specified. */
1397 #define WORD_REGISTER_OPERATIONS
1399 /* When in 64-bit mode, move insns will sign extend SImode and CCmode
1400 moves. All other references are zero extended. */
1401 #define LOAD_EXTEND_OP(MODE) \
1402 (TARGET_64BIT && ((MODE) == SImode || (MODE) == CCmode) \
1403 ? SIGN_EXTEND : ZERO_EXTEND)
1405 /* Define this macro if it is advisable to hold scalars in registers
1406 in a wider mode than that declared by the program. In such cases,
1407 the value is constrained to be within the bounds of the declared
1408 type, but kept valid in the wider mode. The signedness of the
1409 extension may differ from that of the type. */
1411 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
1412 if (GET_MODE_CLASS (MODE) == MODE_INT \
1413 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
1415 if ((MODE) == SImode) \
1420 /* Pmode is always the same as ptr_mode, but not always the same as word_mode.
1421 Extensions of pointers to word_mode must be signed. */
1422 #define POINTERS_EXTEND_UNSIGNED false
1424 /* Define if loading short immediate values into registers sign extends. */
1425 #define SHORT_IMMEDIATES_SIGN_EXTEND
1427 /* The [d]clz instructions have the natural values at 0. */
1429 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
1430 ((VALUE) = GET_MODE_BITSIZE (MODE), 2)
1432 /* Standard register usage. */
1434 /* Number of hardware registers. We have:
1436 - 32 integer registers
1437 - 32 floating point registers
1438 - 8 condition code registers
1439 - 2 accumulator registers (hi and lo)
1440 - 32 registers each for coprocessors 0, 2 and 3
1442 - ARG_POINTER_REGNUM
1443 - FRAME_POINTER_REGNUM
1444 - GOT_VERSION_REGNUM (see the comment above load_call<mode> for details)
1445 - 3 dummy entries that were used at various times in the past.
1446 - 6 DSP accumulator registers (3 hi-lo pairs) for MIPS DSP ASE
1447 - 6 DSP control registers */
1449 #define FIRST_PSEUDO_REGISTER 188
1451 /* By default, fix the kernel registers ($26 and $27), the global
1452 pointer ($28) and the stack pointer ($29). This can change
1453 depending on the command-line options.
1455 Regarding coprocessor registers: without evidence to the contrary,
1456 it's best to assume that each coprocessor register has a unique
1457 use. This can be overridden, in, e.g., mips_override_options or
1458 CONDITIONAL_REGISTER_USAGE should the assumption be inappropriate
1459 for a particular target. */
1461 #define FIXED_REGISTERS \
1463 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1464 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, \
1465 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1466 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1467 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, \
1468 /* COP0 registers */ \
1469 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1470 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1471 /* COP2 registers */ \
1472 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1473 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1474 /* COP3 registers */ \
1475 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1476 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1477 /* 6 DSP accumulator registers & 6 control registers */ \
1478 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1 \
1482 /* Set up this array for o32 by default.
1484 Note that we don't mark $31 as a call-clobbered register. The idea is
1485 that it's really the call instructions themselves which clobber $31.
1486 We don't care what the called function does with it afterwards.
1488 This approach makes it easier to implement sibcalls. Unlike normal
1489 calls, sibcalls don't clobber $31, so the register reaches the
1490 called function in tact. EPILOGUE_USES says that $31 is useful
1491 to the called function. */
1493 #define CALL_USED_REGISTERS \
1495 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1496 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, \
1497 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1498 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1499 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1500 /* COP0 registers */ \
1501 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1502 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1503 /* COP2 registers */ \
1504 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1505 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1506 /* COP3 registers */ \
1507 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1508 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1509 /* 6 DSP accumulator registers & 6 control registers */ \
1510 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 \
1514 /* Define this since $28, though fixed, is call-saved in many ABIs. */
1516 #define CALL_REALLY_USED_REGISTERS \
1517 { /* General registers. */ \
1518 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1519 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, \
1520 /* Floating-point registers. */ \
1521 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1522 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1524 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, \
1525 /* COP0 registers */ \
1526 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1527 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1528 /* COP2 registers */ \
1529 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1530 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1531 /* COP3 registers */ \
1532 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1533 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1534 /* 6 DSP accumulator registers & 6 control registers */ \
1535 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0 \
1538 /* Internal macros to classify a register number as to whether it's a
1539 general purpose register, a floating point register, a
1540 multiply/divide register, or a status register. */
1542 #define GP_REG_FIRST 0
1543 #define GP_REG_LAST 31
1544 #define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1)
1545 #define GP_DBX_FIRST 0
1547 #define FP_REG_FIRST 32
1548 #define FP_REG_LAST 63
1549 #define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1)
1550 #define FP_DBX_FIRST ((write_symbols == DBX_DEBUG) ? 38 : 32)
1552 #define MD_REG_FIRST 64
1553 #define MD_REG_LAST 65
1554 #define MD_REG_NUM (MD_REG_LAST - MD_REG_FIRST + 1)
1555 #define MD_DBX_FIRST (FP_DBX_FIRST + FP_REG_NUM)
1557 /* The DWARF 2 CFA column which tracks the return address from a
1558 signal handler context. This means that to maintain backwards
1559 compatibility, no hard register can be assigned this column if it
1560 would need to be handled by the DWARF unwinder. */
1561 #define DWARF_ALT_FRAME_RETURN_COLUMN 66
1563 #define ST_REG_FIRST 67
1564 #define ST_REG_LAST 74
1565 #define ST_REG_NUM (ST_REG_LAST - ST_REG_FIRST + 1)
1568 /* FIXME: renumber. */
1569 #define COP0_REG_FIRST 80
1570 #define COP0_REG_LAST 111
1571 #define COP0_REG_NUM (COP0_REG_LAST - COP0_REG_FIRST + 1)
1573 #define COP2_REG_FIRST 112
1574 #define COP2_REG_LAST 143
1575 #define COP2_REG_NUM (COP2_REG_LAST - COP2_REG_FIRST + 1)
1577 #define COP3_REG_FIRST 144
1578 #define COP3_REG_LAST 175
1579 #define COP3_REG_NUM (COP3_REG_LAST - COP3_REG_FIRST + 1)
1580 /* ALL_COP_REG_NUM assumes that COP0,2,and 3 are numbered consecutively. */
1581 #define ALL_COP_REG_NUM (COP3_REG_LAST - COP0_REG_FIRST + 1)
1583 #define DSP_ACC_REG_FIRST 176
1584 #define DSP_ACC_REG_LAST 181
1585 #define DSP_ACC_REG_NUM (DSP_ACC_REG_LAST - DSP_ACC_REG_FIRST + 1)
1587 #define AT_REGNUM (GP_REG_FIRST + 1)
1588 #define HI_REGNUM (TARGET_BIG_ENDIAN ? MD_REG_FIRST : MD_REG_FIRST + 1)
1589 #define LO_REGNUM (TARGET_BIG_ENDIAN ? MD_REG_FIRST + 1 : MD_REG_FIRST)
1591 /* FPSW_REGNUM is the single condition code used if !ISA_HAS_8CC.
1592 If ISA_HAS_8CC, it should not be used, and an arbitrary ST_REG
1593 should be used instead. */
1594 #define FPSW_REGNUM ST_REG_FIRST
1596 #define GP_REG_P(REGNO) \
1597 ((unsigned int) ((int) (REGNO) - GP_REG_FIRST) < GP_REG_NUM)
1598 #define M16_REG_P(REGNO) \
1599 (((REGNO) >= 2 && (REGNO) <= 7) || (REGNO) == 16 || (REGNO) == 17)
1600 #define FP_REG_P(REGNO) \
1601 ((unsigned int) ((int) (REGNO) - FP_REG_FIRST) < FP_REG_NUM)
1602 #define MD_REG_P(REGNO) \
1603 ((unsigned int) ((int) (REGNO) - MD_REG_FIRST) < MD_REG_NUM)
1604 #define ST_REG_P(REGNO) \
1605 ((unsigned int) ((int) (REGNO) - ST_REG_FIRST) < ST_REG_NUM)
1606 #define COP0_REG_P(REGNO) \
1607 ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < COP0_REG_NUM)
1608 #define COP2_REG_P(REGNO) \
1609 ((unsigned int) ((int) (REGNO) - COP2_REG_FIRST) < COP2_REG_NUM)
1610 #define COP3_REG_P(REGNO) \
1611 ((unsigned int) ((int) (REGNO) - COP3_REG_FIRST) < COP3_REG_NUM)
1612 #define ALL_COP_REG_P(REGNO) \
1613 ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < ALL_COP_REG_NUM)
1614 /* Test if REGNO is one of the 6 new DSP accumulators. */
1615 #define DSP_ACC_REG_P(REGNO) \
1616 ((unsigned int) ((int) (REGNO) - DSP_ACC_REG_FIRST) < DSP_ACC_REG_NUM)
1617 /* Test if REGNO is hi, lo, or one of the 6 new DSP accumulators. */
1618 #define ACC_REG_P(REGNO) \
1619 (MD_REG_P (REGNO) || DSP_ACC_REG_P (REGNO))
1621 #define FP_REG_RTX_P(X) (REG_P (X) && FP_REG_P (REGNO (X)))
1623 /* True if X is (const (unspec [(const_int 0)] UNSPEC_GP)). This is used
1624 to initialize the mips16 gp pseudo register. */
1625 #define CONST_GP_P(X) \
1626 (GET_CODE (X) == CONST \
1627 && GET_CODE (XEXP (X, 0)) == UNSPEC \
1628 && XINT (XEXP (X, 0), 1) == UNSPEC_GP)
1630 /* Return coprocessor number from register number. */
1632 #define COPNUM_AS_CHAR_FROM_REGNUM(REGNO) \
1633 (COP0_REG_P (REGNO) ? '0' : COP2_REG_P (REGNO) ? '2' \
1634 : COP3_REG_P (REGNO) ? '3' : '?')
1637 #define HARD_REGNO_NREGS(REGNO, MODE) mips_hard_regno_nregs (REGNO, MODE)
1639 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
1640 mips_hard_regno_mode_ok[ (int)(MODE) ][ (REGNO) ]
1642 #define MODES_TIEABLE_P mips_modes_tieable_p
1644 /* Register to use for pushing function arguments. */
1645 #define STACK_POINTER_REGNUM (GP_REG_FIRST + 29)
1647 /* These two registers don't really exist: they get eliminated to either
1648 the stack or hard frame pointer. */
1649 #define ARG_POINTER_REGNUM 77
1650 #define FRAME_POINTER_REGNUM 78
1652 /* $30 is not available on the mips16, so we use $17 as the frame
1654 #define HARD_FRAME_POINTER_REGNUM \
1655 (TARGET_MIPS16 ? GP_REG_FIRST + 17 : GP_REG_FIRST + 30)
1657 #define FRAME_POINTER_REQUIRED (mips_frame_pointer_required ())
1659 /* Register in which static-chain is passed to a function. */
1660 #define STATIC_CHAIN_REGNUM (GP_REG_FIRST + 15)
1662 /* Registers used as temporaries in prologue/epilogue code:
1664 - If a MIPS16 PIC function needs access to _gp, it first loads
1665 the value into MIPS16_PIC_TEMP and then copies it to $gp.
1667 - The prologue can use MIPS_PROLOGUE_TEMP as a general temporary
1668 register. The register must not conflict with MIPS16_PIC_TEMP.
1670 - The epilogue can use MIPS_EPILOGUE_TEMP as a general temporary
1673 If we're generating MIPS16 code, these registers must come from the
1674 core set of 8. The prologue registers mustn't conflict with any
1675 incoming arguments, the static chain pointer, or the frame pointer.
1676 The epilogue temporary mustn't conflict with the return registers,
1677 the PIC call register ($25), the frame pointer, the EH stack adjustment,
1678 or the EH data registers. */
1680 #define MIPS16_PIC_TEMP_REGNUM (GP_REG_FIRST + 2)
1681 #define MIPS_PROLOGUE_TEMP_REGNUM (GP_REG_FIRST + 3)
1682 #define MIPS_EPILOGUE_TEMP_REGNUM (GP_REG_FIRST + (TARGET_MIPS16 ? 6 : 8))
1684 #define MIPS16_PIC_TEMP gen_rtx_REG (Pmode, MIPS16_PIC_TEMP_REGNUM)
1685 #define MIPS_PROLOGUE_TEMP(MODE) gen_rtx_REG (MODE, MIPS_PROLOGUE_TEMP_REGNUM)
1686 #define MIPS_EPILOGUE_TEMP(MODE) gen_rtx_REG (MODE, MIPS_EPILOGUE_TEMP_REGNUM)
1688 /* Define this macro if it is as good or better to call a constant
1689 function address than to call an address kept in a register. */
1690 #define NO_FUNCTION_CSE 1
1692 /* The ABI-defined global pointer. Sometimes we use a different
1693 register in leaf functions: see PIC_OFFSET_TABLE_REGNUM. */
1694 #define GLOBAL_POINTER_REGNUM (GP_REG_FIRST + 28)
1696 /* We normally use $28 as the global pointer. However, when generating
1697 n32/64 PIC, it is better for leaf functions to use a call-clobbered
1698 register instead. They can then avoid saving and restoring $28
1699 and perhaps avoid using a frame at all.
1701 When a leaf function uses something other than $28, mips_expand_prologue
1702 will modify pic_offset_table_rtx in place. Take the register number
1703 from there after reload. */
1704 #define PIC_OFFSET_TABLE_REGNUM \
1705 (reload_completed ? REGNO (pic_offset_table_rtx) : GLOBAL_POINTER_REGNUM)
1707 #define PIC_FUNCTION_ADDR_REGNUM (GP_REG_FIRST + 25)
1709 /* Define the classes of registers for register constraints in the
1710 machine description. Also define ranges of constants.
1712 One of the classes must always be named ALL_REGS and include all hard regs.
1713 If there is more than one class, another class must be named NO_REGS
1714 and contain no registers.
1716 The name GENERAL_REGS must be the name of a class (or an alias for
1717 another name such as ALL_REGS). This is the class of registers
1718 that is allowed by "g" or "r" in a register constraint.
1719 Also, registers outside this class are allocated only when
1720 instructions express preferences for them.
1722 The classes must be numbered in nondecreasing order; that is,
1723 a larger-numbered class must never be contained completely
1724 in a smaller-numbered class.
1726 For any two classes, it is very desirable that there be another
1727 class that represents their union. */
1731 NO_REGS, /* no registers in set */
1732 M16_REGS, /* mips16 directly accessible registers */
1733 T_REG, /* mips16 T register ($24) */
1734 M16_T_REGS, /* mips16 registers plus T register */
1735 PIC_FN_ADDR_REG, /* SVR4 PIC function address register */
1736 V1_REG, /* Register $v1 ($3) used for TLS access. */
1737 LEA_REGS, /* Every GPR except $25 */
1738 GR_REGS, /* integer registers */
1739 FP_REGS, /* floating point registers */
1740 MD0_REG, /* first multiply/divide register */
1741 MD1_REG, /* second multiply/divide register */
1742 MD_REGS, /* multiply/divide registers (hi/lo) */
1743 COP0_REGS, /* generic coprocessor classes */
1746 HI_AND_GR_REGS, /* union classes */
1753 ALL_COP_AND_GR_REGS,
1754 ST_REGS, /* status registers (fp status) */
1755 DSP_ACC_REGS, /* DSP accumulator registers */
1756 ACC_REGS, /* Hi/Lo and DSP accumulator registers */
1757 ALL_REGS, /* all registers */
1758 LIM_REG_CLASSES /* max value + 1 */
1761 #define N_REG_CLASSES (int) LIM_REG_CLASSES
1763 #define GENERAL_REGS GR_REGS
1765 /* An initializer containing the names of the register classes as C
1766 string constants. These names are used in writing some of the
1769 #define REG_CLASS_NAMES \
1775 "PIC_FN_ADDR_REG", \
1783 /* coprocessor registers */ \
1790 "COP0_AND_GR_REGS", \
1791 "COP2_AND_GR_REGS", \
1792 "COP3_AND_GR_REGS", \
1794 "ALL_COP_AND_GR_REGS", \
1801 /* An initializer containing the contents of the register classes,
1802 as integers which are bit masks. The Nth integer specifies the
1803 contents of class N. The way the integer MASK is interpreted is
1804 that register R is in the class if `MASK & (1 << R)' is 1.
1806 When the machine has more than 32 registers, an integer does not
1807 suffice. Then the integers are replaced by sub-initializers,
1808 braced groupings containing several integers. Each
1809 sub-initializer must be suitable as an initializer for the type
1810 `HARD_REG_SET' which is defined in `hard-reg-set.h'. */
1812 #define REG_CLASS_CONTENTS \
1814 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* no registers */ \
1815 { 0x000300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 registers */ \
1816 { 0x01000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 T register */ \
1817 { 0x010300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 and T regs */ \
1818 { 0x02000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* SVR4 PIC function address register */ \
1819 { 0x00000008, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* only $v1 */ \
1820 { 0xfdffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* Every other GPR except $25 */ \
1821 { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* integer registers */ \
1822 { 0x00000000, 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* floating registers*/ \
1823 { 0x00000000, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* hi register */ \
1824 { 0x00000000, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, /* lo register */ \
1825 { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x00000000 }, /* mul/div registers */ \
1826 { 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000, 0x00000000 }, /* cop0 registers */ \
1827 { 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000 }, /* cop2 registers */ \
1828 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff }, /* cop3 registers */ \
1829 { 0xffffffff, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* union classes */ \
1830 { 0xffffffff, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, \
1831 { 0x00000000, 0xffffffff, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, \
1832 { 0xffffffff, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000, 0x00000000 }, \
1833 { 0xffffffff, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000 }, \
1834 { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff }, \
1835 { 0x00000000, 0x00000000, 0xffff0000, 0xffffffff, 0xffffffff, 0x0000ffff }, \
1836 { 0xffffffff, 0x00000000, 0xffff0000, 0xffffffff, 0xffffffff, 0x0000ffff }, \
1837 { 0x00000000, 0x00000000, 0x000007f8, 0x00000000, 0x00000000, 0x00000000 }, /* status registers */ \
1838 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x003f0000 }, /* dsp accumulator registers */ \
1839 { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x003f0000 }, /* hi/lo and dsp accumulator registers */ \
1840 { 0xffffffff, 0xffffffff, 0xffff07ff, 0xffffffff, 0xffffffff, 0x0fffffff } /* all registers */ \
1844 /* A C expression whose value is a register class containing hard
1845 register REGNO. In general there is more that one such class;
1846 choose a class which is "minimal", meaning that no smaller class
1847 also contains the register. */
1849 #define REGNO_REG_CLASS(REGNO) mips_regno_to_class[ (REGNO) ]
1851 /* A macro whose definition is the name of the class to which a
1852 valid base register must belong. A base register is one used in
1853 an address which is the register value plus a displacement. */
1855 #define BASE_REG_CLASS (TARGET_MIPS16 ? M16_REGS : GR_REGS)
1857 /* A macro whose definition is the name of the class to which a
1858 valid index register must belong. An index register is one used
1859 in an address where its value is either multiplied by a scale
1860 factor or added to another register (as well as added to a
1863 #define INDEX_REG_CLASS NO_REGS
1865 /* When SMALL_REGISTER_CLASSES is nonzero, the compiler allows
1866 registers explicitly used in the rtl to be used as spill registers
1867 but prevents the compiler from extending the lifetime of these
1870 #define SMALL_REGISTER_CLASSES (TARGET_MIPS16)
1872 /* REG_ALLOC_ORDER is to order in which to allocate registers. This
1873 is the default value (allocate the registers in numeric order). We
1874 define it just so that we can override it for the mips16 target in
1875 ORDER_REGS_FOR_LOCAL_ALLOC. */
1877 #define REG_ALLOC_ORDER \
1878 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \
1879 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, \
1880 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \
1881 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, \
1882 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \
1883 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, \
1884 96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111, \
1885 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127, \
1886 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, \
1887 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159, \
1888 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175, \
1889 176,177,178,179,180,181,182,183,184,185,186,187 \
1892 /* ORDER_REGS_FOR_LOCAL_ALLOC is a macro which permits reg_alloc_order
1893 to be rearranged based on a particular function. On the mips16, we
1894 want to allocate $24 (T_REG) before other registers for
1895 instructions for which it is possible. */
1897 #define ORDER_REGS_FOR_LOCAL_ALLOC mips_order_regs_for_local_alloc ()
1899 /* True if VALUE is an unsigned 6-bit number. */
1901 #define UIMM6_OPERAND(VALUE) \
1902 (((VALUE) & ~(unsigned HOST_WIDE_INT) 0x3f) == 0)
1904 /* True if VALUE is a signed 10-bit number. */
1906 #define IMM10_OPERAND(VALUE) \
1907 ((unsigned HOST_WIDE_INT) (VALUE) + 0x200 < 0x400)
1909 /* True if VALUE is a signed 16-bit number. */
1911 #define SMALL_OPERAND(VALUE) \
1912 ((unsigned HOST_WIDE_INT) (VALUE) + 0x8000 < 0x10000)
1914 /* True if VALUE is an unsigned 16-bit number. */
1916 #define SMALL_OPERAND_UNSIGNED(VALUE) \
1917 (((VALUE) & ~(unsigned HOST_WIDE_INT) 0xffff) == 0)
1919 /* True if VALUE can be loaded into a register using LUI. */
1921 #define LUI_OPERAND(VALUE) \
1922 (((VALUE) | 0x7fff0000) == 0x7fff0000 \
1923 || ((VALUE) | 0x7fff0000) + 0x10000 == 0)
1925 /* Return a value X with the low 16 bits clear, and such that
1926 VALUE - X is a signed 16-bit value. */
1928 #define CONST_HIGH_PART(VALUE) \
1929 (((VALUE) + 0x8000) & ~(unsigned HOST_WIDE_INT) 0xffff)
1931 #define CONST_LOW_PART(VALUE) \
1932 ((VALUE) - CONST_HIGH_PART (VALUE))
1934 #define SMALL_INT(X) SMALL_OPERAND (INTVAL (X))
1935 #define SMALL_INT_UNSIGNED(X) SMALL_OPERAND_UNSIGNED (INTVAL (X))
1936 #define LUI_INT(X) LUI_OPERAND (INTVAL (X))
1938 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
1939 mips_preferred_reload_class (X, CLASS)
1941 /* The HI and LO registers can only be reloaded via the general
1942 registers. Condition code registers can only be loaded to the
1943 general registers, and from the floating point registers. */
1945 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1946 mips_secondary_reload_class (CLASS, MODE, X, true)
1947 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1948 mips_secondary_reload_class (CLASS, MODE, X, false)
1950 /* Return the maximum number of consecutive registers
1951 needed to represent mode MODE in a register of class CLASS. */
1953 #define CLASS_MAX_NREGS(CLASS, MODE) mips_class_max_nregs (CLASS, MODE)
1955 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
1956 mips_cannot_change_mode_class (FROM, TO, CLASS)
1958 /* Stack layout; function entry, exit and calling. */
1960 #define STACK_GROWS_DOWNWARD
1962 /* The offset of the first local variable from the beginning of the frame.
1963 See mips_compute_frame_info for details about the frame layout. */
1965 #define STARTING_FRAME_OFFSET \
1966 (crtl->outgoing_args_size \
1967 + (TARGET_CALL_CLOBBERED_GP ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0))
1969 #define RETURN_ADDR_RTX mips_return_addr
1971 /* Mask off the MIPS16 ISA bit in unwind addresses.
1973 The reason for this is a little subtle. When unwinding a call,
1974 we are given the call's return address, which on most targets
1975 is the address of the following instruction. However, what we
1976 actually want to find is the EH region for the call itself.
1977 The target-independent unwind code therefore searches for "RA - 1".
1979 In the MIPS16 case, RA is always an odd-valued (ISA-encoded) address.
1980 RA - 1 is therefore the real (even-valued) start of the return
1981 instruction. EH region labels are usually odd-valued MIPS16 symbols
1982 too, so a search for an even address within a MIPS16 region would
1985 However, there is an exception. If the end of an EH region is also
1986 the end of a function, the end label is allowed to be even. This is
1987 necessary because a following non-MIPS16 function may also need EH
1988 information for its first instruction.
1990 Thus a MIPS16 region may be terminated by an ISA-encoded or a
1991 non-ISA-encoded address. This probably isn't ideal, but it is
1992 the traditional (legacy) behavior. It is therefore only safe
1993 to search MIPS EH regions for an _odd-valued_ address.
1995 Masking off the ISA bit means that the target-independent code
1996 will search for "(RA & -2) - 1", which is guaranteed to be odd. */
1997 #define MASK_RETURN_ADDR GEN_INT (-2)
2000 /* Similarly, don't use the least-significant bit to tell pointers to
2001 code from vtable index. */
2003 #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_delta
2005 /* The eliminations to $17 are only used for mips16 code. See the
2006 definition of HARD_FRAME_POINTER_REGNUM. */
2008 #define ELIMINABLE_REGS \
2009 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2010 { ARG_POINTER_REGNUM, GP_REG_FIRST + 30}, \
2011 { ARG_POINTER_REGNUM, GP_REG_FIRST + 17}, \
2012 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2013 { FRAME_POINTER_REGNUM, GP_REG_FIRST + 30}, \
2014 { FRAME_POINTER_REGNUM, GP_REG_FIRST + 17}}
2016 /* Make sure that we're not trying to eliminate to the wrong hard frame
2018 #define CAN_ELIMINATE(FROM, TO) \
2019 ((TO) == HARD_FRAME_POINTER_REGNUM || (TO) == STACK_POINTER_REGNUM)
2021 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
2022 (OFFSET) = mips_initial_elimination_offset ((FROM), (TO))
2024 /* Allocate stack space for arguments at the beginning of each function. */
2025 #define ACCUMULATE_OUTGOING_ARGS 1
2027 /* The argument pointer always points to the first argument. */
2028 #define FIRST_PARM_OFFSET(FNDECL) 0
2030 /* o32 and o64 reserve stack space for all argument registers. */
2031 #define REG_PARM_STACK_SPACE(FNDECL) \
2033 ? (MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD) \
2036 /* Define this if it is the responsibility of the caller to
2037 allocate the area reserved for arguments passed in registers.
2038 If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect
2039 of this macro is to determine whether the space is included in
2040 `crtl->outgoing_args_size'. */
2041 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1
2043 #define STACK_BOUNDARY (TARGET_NEWABI ? 128 : 64)
2045 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
2047 /* Symbolic macros for the registers used to return integer and floating
2050 #define GP_RETURN (GP_REG_FIRST + 2)
2051 #define FP_RETURN ((TARGET_SOFT_FLOAT) ? GP_RETURN : (FP_REG_FIRST + 0))
2053 #define MAX_ARGS_IN_REGISTERS (TARGET_OLDABI ? 4 : 8)
2055 /* Symbolic macros for the first/last argument registers. */
2057 #define GP_ARG_FIRST (GP_REG_FIRST + 4)
2058 #define GP_ARG_LAST (GP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
2059 #define FP_ARG_FIRST (FP_REG_FIRST + 12)
2060 #define FP_ARG_LAST (FP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
2062 #define LIBCALL_VALUE(MODE) \
2063 mips_function_value (NULL_TREE, MODE)
2065 #define FUNCTION_VALUE(VALTYPE, FUNC) \
2066 mips_function_value (VALTYPE, VOIDmode)
2068 /* 1 if N is a possible register number for a function value.
2069 On the MIPS, R2 R3 and F0 F2 are the only register thus used.
2070 Currently, R2 and F0 are only implemented here (C has no complex type) */
2072 #define FUNCTION_VALUE_REGNO_P(N) ((N) == GP_RETURN || (N) == FP_RETURN \
2073 || (LONG_DOUBLE_TYPE_SIZE == 128 && FP_RETURN != GP_RETURN \
2074 && (N) == FP_RETURN + 2))
2076 /* 1 if N is a possible register number for function argument passing.
2077 We have no FP argument registers when soft-float. When FP registers
2078 are 32 bits, we can't directly reference the odd numbered ones. */
2080 #define FUNCTION_ARG_REGNO_P(N) \
2081 ((IN_RANGE((N), GP_ARG_FIRST, GP_ARG_LAST) \
2082 || (IN_RANGE((N), FP_ARG_FIRST, FP_ARG_LAST))) \
2085 /* This structure has to cope with two different argument allocation
2086 schemes. Most MIPS ABIs view the arguments as a structure, of which
2087 the first N words go in registers and the rest go on the stack. If I
2088 < N, the Ith word might go in Ith integer argument register or in a
2089 floating-point register. For these ABIs, we only need to remember
2090 the offset of the current argument into the structure.
2092 The EABI instead allocates the integer and floating-point arguments
2093 separately. The first N words of FP arguments go in FP registers,
2094 the rest go on the stack. Likewise, the first N words of the other
2095 arguments go in integer registers, and the rest go on the stack. We
2096 need to maintain three counts: the number of integer registers used,
2097 the number of floating-point registers used, and the number of words
2098 passed on the stack.
2100 We could keep separate information for the two ABIs (a word count for
2101 the standard ABIs, and three separate counts for the EABI). But it
2102 seems simpler to view the standard ABIs as forms of EABI that do not
2103 allocate floating-point registers.
2105 So for the standard ABIs, the first N words are allocated to integer
2106 registers, and mips_function_arg decides on an argument-by-argument
2107 basis whether that argument should really go in an integer register,
2108 or in a floating-point one. */
2110 typedef struct mips_args {
2111 /* Always true for varargs functions. Otherwise true if at least
2112 one argument has been passed in an integer register. */
2115 /* The number of arguments seen so far. */
2116 unsigned int arg_number;
2118 /* The number of integer registers used so far. For all ABIs except
2119 EABI, this is the number of words that have been added to the
2120 argument structure, limited to MAX_ARGS_IN_REGISTERS. */
2121 unsigned int num_gprs;
2123 /* For EABI, the number of floating-point registers used so far. */
2124 unsigned int num_fprs;
2126 /* The number of words passed on the stack. */
2127 unsigned int stack_words;
2129 /* On the mips16, we need to keep track of which floating point
2130 arguments were passed in general registers, but would have been
2131 passed in the FP regs if this were a 32-bit function, so that we
2132 can move them to the FP regs if we wind up calling a 32-bit
2133 function. We record this information in fp_code, encoded in base
2134 four. A zero digit means no floating point argument, a one digit
2135 means an SFmode argument, and a two digit means a DFmode argument,
2136 and a three digit is not used. The low order digit is the first
2137 argument. Thus 6 == 1 * 4 + 2 means a DFmode argument followed by
2138 an SFmode argument. ??? A more sophisticated approach will be
2139 needed if MIPS_ABI != ABI_32. */
2142 /* True if the function has a prototype. */
2146 /* Initialize a variable CUM of type CUMULATIVE_ARGS
2147 for a call to a function whose data type is FNTYPE.
2148 For a library call, FNTYPE is 0. */
2150 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
2151 mips_init_cumulative_args (&CUM, FNTYPE)
2153 /* Update the data in CUM to advance over an argument
2154 of mode MODE and data type TYPE.
2155 (TYPE is null for libcalls where that information may not be available.) */
2157 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
2158 mips_function_arg_advance (&CUM, MODE, TYPE, NAMED)
2160 /* Determine where to put an argument to a function.
2161 Value is zero to push the argument on the stack,
2162 or a hard register in which to store the argument.
2164 MODE is the argument's machine mode.
2165 TYPE is the data type of the argument (as a tree).
2166 This is null for libcalls where that information may
2168 CUM is a variable of type CUMULATIVE_ARGS which gives info about
2169 the preceding args and about the function being called.
2170 NAMED is nonzero if this argument is a named parameter
2171 (otherwise it is an extra parameter matching an ellipsis). */
2173 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
2174 mips_function_arg (&CUM, MODE, TYPE, NAMED)
2176 #define FUNCTION_ARG_BOUNDARY mips_function_arg_boundary
2178 #define FUNCTION_ARG_PADDING(MODE, TYPE) \
2179 (mips_pad_arg_upward (MODE, TYPE) ? upward : downward)
2181 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
2182 (mips_pad_reg_upward (MODE, TYPE) ? upward : downward)
2184 /* True if using EABI and varargs can be passed in floating-point
2185 registers. Under these conditions, we need a more complex form
2186 of va_list, which tracks GPR, FPR and stack arguments separately. */
2187 #define EABI_FLOAT_VARARGS_P \
2188 (mips_abi == ABI_EABI && UNITS_PER_FPVALUE >= UNITS_PER_DOUBLE)
2191 /* Say that the epilogue uses the return address register. Note that
2192 in the case of sibcalls, the values "used by the epilogue" are
2193 considered live at the start of the called function.
2195 If using a GOT, say that the epilogue also uses GOT_VERSION_REGNUM.
2196 See the comment above load_call<mode> for details. */
2197 #define EPILOGUE_USES(REGNO) \
2198 ((REGNO) == 31 || (TARGET_USE_GOT && (REGNO) == GOT_VERSION_REGNUM))
2200 /* Treat LOC as a byte offset from the stack pointer and round it up
2201 to the next fully-aligned offset. */
2202 #define MIPS_STACK_ALIGN(LOC) \
2203 (TARGET_NEWABI ? ((LOC) + 15) & -16 : ((LOC) + 7) & -8)
2206 /* Output assembler code to FILE to increment profiler label # LABELNO
2207 for profiling a function entry. */
2209 #define FUNCTION_PROFILER(FILE, LABELNO) \
2211 if (TARGET_MIPS16) \
2212 sorry ("mips16 function profiling"); \
2213 fprintf (FILE, "\t.set\tnoat\n"); \
2214 fprintf (FILE, "\tmove\t%s,%s\t\t# save current return address\n", \
2215 reg_names[GP_REG_FIRST + 1], reg_names[GP_REG_FIRST + 31]); \
2216 /* _mcount treats $2 as the static chain register. */ \
2217 if (cfun->static_chain_decl != NULL) \
2218 fprintf (FILE, "\tmove\t%s,%s\n", reg_names[2], \
2219 reg_names[STATIC_CHAIN_REGNUM]); \
2220 if (!TARGET_NEWABI) \
2223 "\t%s\t%s,%s,%d\t\t# _mcount pops 2 words from stack\n", \
2224 TARGET_64BIT ? "dsubu" : "subu", \
2225 reg_names[STACK_POINTER_REGNUM], \
2226 reg_names[STACK_POINTER_REGNUM], \
2227 Pmode == DImode ? 16 : 8); \
2229 fprintf (FILE, "\tjal\t_mcount\n"); \
2230 fprintf (FILE, "\t.set\tat\n"); \
2231 /* _mcount treats $2 as the static chain register. */ \
2232 if (cfun->static_chain_decl != NULL) \
2233 fprintf (FILE, "\tmove\t%s,%s\n", reg_names[STATIC_CHAIN_REGNUM], \
2237 /* The profiler preserves all interesting registers, including $31. */
2238 #define MIPS_SAVE_REG_FOR_PROFILING_P(REGNO) false
2240 /* No mips port has ever used the profiler counter word, so don't emit it
2241 or the label for it. */
2243 #define NO_PROFILE_COUNTERS 1
2245 /* Define this macro if the code for function profiling should come
2246 before the function prologue. Normally, the profiling code comes
2249 /* #define PROFILE_BEFORE_PROLOGUE */
2251 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
2252 the stack pointer does not matter. The value is tested only in
2253 functions that have frame pointers.
2254 No definition is equivalent to always zero. */
2256 #define EXIT_IGNORE_STACK 1
2259 /* A C statement to output, on the stream FILE, assembler code for a
2260 block of data that contains the constant parts of a trampoline.
2261 This code should not include a label--the label is taken care of
2264 #define TRAMPOLINE_TEMPLATE(STREAM) \
2266 if (ptr_mode == DImode) \
2267 fprintf (STREAM, "\t.word\t0x03e0082d\t\t# dmove $1,$31\n"); \
2269 fprintf (STREAM, "\t.word\t0x03e00821\t\t# move $1,$31\n"); \
2270 fprintf (STREAM, "\t.word\t0x04110001\t\t# bgezal $0,.+8\n"); \
2271 fprintf (STREAM, "\t.word\t0x00000000\t\t# nop\n"); \
2272 if (ptr_mode == DImode) \
2274 fprintf (STREAM, "\t.word\t0xdff90014\t\t# ld $25,20($31)\n"); \
2275 fprintf (STREAM, "\t.word\t0xdfef001c\t\t# ld $15,28($31)\n"); \
2279 fprintf (STREAM, "\t.word\t0x8ff90010\t\t# lw $25,16($31)\n"); \
2280 fprintf (STREAM, "\t.word\t0x8fef0014\t\t# lw $15,20($31)\n"); \
2282 fprintf (STREAM, "\t.word\t0x03200008\t\t# jr $25\n"); \
2283 if (ptr_mode == DImode) \
2285 fprintf (STREAM, "\t.word\t0x0020f82d\t\t# dmove $31,$1\n"); \
2286 fprintf (STREAM, "\t.word\t0x00000000\t\t# <padding>\n"); \
2287 fprintf (STREAM, "\t.dword\t0x00000000\t\t# <function address>\n"); \
2288 fprintf (STREAM, "\t.dword\t0x00000000\t\t# <static chain value>\n"); \
2292 fprintf (STREAM, "\t.word\t0x0020f821\t\t# move $31,$1\n"); \
2293 fprintf (STREAM, "\t.word\t0x00000000\t\t# <function address>\n"); \
2294 fprintf (STREAM, "\t.word\t0x00000000\t\t# <static chain value>\n"); \
2298 /* A C expression for the size in bytes of the trampoline, as an
2301 #define TRAMPOLINE_SIZE (ptr_mode == DImode ? 48 : 36)
2303 /* Alignment required for trampolines, in bits. */
2305 #define TRAMPOLINE_ALIGNMENT GET_MODE_BITSIZE (ptr_mode)
2307 /* INITIALIZE_TRAMPOLINE calls this library function to flush
2308 program and data caches. */
2310 #ifndef CACHE_FLUSH_FUNC
2311 #define CACHE_FLUSH_FUNC "_flush_cache"
2314 #define MIPS_ICACHE_SYNC(ADDR, SIZE) \
2315 /* Flush both caches. We need to flush the data cache in case \
2316 the system has a write-back cache. */ \
2317 emit_library_call (gen_rtx_SYMBOL_REF (Pmode, mips_cache_flush_func), \
2318 0, VOIDmode, 3, ADDR, Pmode, SIZE, Pmode, \
2319 GEN_INT (3), TYPE_MODE (integer_type_node))
2321 /* A C statement to initialize the variable parts of a trampoline.
2322 ADDR is an RTX for the address of the trampoline; FNADDR is an
2323 RTX for the address of the nested function; STATIC_CHAIN is an
2324 RTX for the static chain value that should be passed to the
2325 function when it is called. */
2327 #define INITIALIZE_TRAMPOLINE(ADDR, FUNC, CHAIN) \
2329 rtx func_addr, chain_addr, end_addr; \
2331 func_addr = plus_constant (ADDR, ptr_mode == DImode ? 32 : 28); \
2332 chain_addr = plus_constant (func_addr, GET_MODE_SIZE (ptr_mode)); \
2333 mips_emit_move (gen_rtx_MEM (ptr_mode, func_addr), FUNC); \
2334 mips_emit_move (gen_rtx_MEM (ptr_mode, chain_addr), CHAIN); \
2335 end_addr = gen_reg_rtx (Pmode); \
2336 emit_insn (gen_add3_insn (end_addr, copy_rtx (ADDR), \
2337 GEN_INT (TRAMPOLINE_SIZE))); \
2338 emit_insn (gen_clear_cache (copy_rtx (ADDR), end_addr)); \
2341 /* Addressing modes, and classification of registers for them. */
2343 #define REGNO_OK_FOR_INDEX_P(REGNO) 0
2344 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
2345 mips_regno_mode_ok_for_base_p (REGNO, MODE, 1)
2347 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
2348 and check its validity for a certain class.
2349 We have two alternate definitions for each of them.
2350 The usual definition accepts all pseudo regs; the other rejects them all.
2351 The symbol REG_OK_STRICT causes the latter definition to be used.
2353 Most source files want to accept pseudo regs in the hope that
2354 they will get allocated to the class that the insn wants them to be in.
2355 Some source files that are used after register allocation
2356 need to be strict. */
2358 #ifndef REG_OK_STRICT
2359 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
2360 mips_regno_mode_ok_for_base_p (REGNO (X), MODE, 0)
2362 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
2363 mips_regno_mode_ok_for_base_p (REGNO (X), MODE, 1)
2366 #define REG_OK_FOR_INDEX_P(X) 0
2369 /* Maximum number of registers that can appear in a valid memory address. */
2371 #define MAX_REGS_PER_ADDRESS 1
2373 #ifdef REG_OK_STRICT
2374 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
2376 if (mips_legitimate_address_p (MODE, X, 1)) \
2380 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
2382 if (mips_legitimate_address_p (MODE, X, 0)) \
2387 /* Check for constness inline but use mips_legitimate_address_p
2388 to check whether a constant really is an address. */
2390 #define CONSTANT_ADDRESS_P(X) \
2391 (CONSTANT_P (X) && mips_legitimate_address_p (SImode, X, 0))
2393 #define LEGITIMATE_CONSTANT_P(X) (mips_const_insns (X) > 0)
2395 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \
2397 if (mips_legitimize_address (&(X), MODE)) \
2402 /* A C statement or compound statement with a conditional `goto
2403 LABEL;' executed if memory address X (an RTX) can have different
2404 meanings depending on the machine mode of the memory reference it
2407 Autoincrement and autodecrement addresses typically have
2408 mode-dependent effects because the amount of the increment or
2409 decrement is the size of the operand being addressed. Some
2410 machines have other mode-dependent addresses. Many RISC machines
2411 have no mode-dependent addresses.
2413 You may assume that ADDR is a valid address for the machine. */
2415 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) {}
2417 /* This handles the magic '..CURRENT_FUNCTION' symbol, which means
2418 'the start of the function that this code is output in'. */
2420 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
2421 if (strcmp (NAME, "..CURRENT_FUNCTION") == 0) \
2422 asm_fprintf ((FILE), "%U%s", \
2423 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
2425 asm_fprintf ((FILE), "%U%s", (NAME))
2427 /* Flag to mark a function decl symbol that requires a long call. */
2428 #define SYMBOL_FLAG_LONG_CALL (SYMBOL_FLAG_MACH_DEP << 0)
2429 #define SYMBOL_REF_LONG_CALL_P(X) \
2430 ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_LONG_CALL) != 0)
2432 /* This flag marks functions that cannot be lazily bound. */
2433 #define SYMBOL_FLAG_BIND_NOW (SYMBOL_FLAG_MACH_DEP << 1)
2434 #define SYMBOL_REF_BIND_NOW_P(RTX) \
2435 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_BIND_NOW) != 0)
2437 /* True if we're generating a form of MIPS16 code in which jump tables
2438 are stored in the text section and encoded as 16-bit PC-relative
2439 offsets. This is only possible when general text loads are allowed,
2440 since the table access itself will be an "lh" instruction. */
2441 /* ??? 16-bit offsets can overflow in large functions. */
2442 #define TARGET_MIPS16_SHORT_JUMP_TABLES TARGET_MIPS16_TEXT_LOADS
2444 #define JUMP_TABLES_IN_TEXT_SECTION TARGET_MIPS16_SHORT_JUMP_TABLES
2446 #define CASE_VECTOR_MODE (TARGET_MIPS16_SHORT_JUMP_TABLES ? HImode : ptr_mode)
2448 #define CASE_VECTOR_PC_RELATIVE TARGET_MIPS16_SHORT_JUMP_TABLES
2450 /* Define this as 1 if `char' should by default be signed; else as 0. */
2451 #ifndef DEFAULT_SIGNED_CHAR
2452 #define DEFAULT_SIGNED_CHAR 1
2455 /* Although LDC1 and SDC1 provide 64-bit moves on 32-bit targets,
2456 we generally don't want to use them for copying arbitrary data.
2457 A single N-word move is usually the same cost as N single-word moves. */
2458 #define MOVE_MAX UNITS_PER_WORD
2459 #define MAX_MOVE_MAX 8
2461 /* Define this macro as a C expression which is nonzero if
2462 accessing less than a word of memory (i.e. a `char' or a
2463 `short') is no faster than accessing a word of memory, i.e., if
2464 such access require more than one instruction or if there is no
2465 difference in cost between byte and (aligned) word loads.
2467 On RISC machines, it tends to generate better code to define
2468 this as 1, since it avoids making a QI or HI mode register.
2470 But, generating word accesses for -mips16 is generally bad as shifts
2471 (often extended) would be needed for byte accesses. */
2472 #define SLOW_BYTE_ACCESS (!TARGET_MIPS16)
2474 /* Define this to be nonzero if shift instructions ignore all but the low-order
2476 #define SHIFT_COUNT_TRUNCATED 1
2478 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
2479 is done just by pretending it is already truncated. */
2480 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) \
2481 (TARGET_64BIT ? ((INPREC) <= 32 || (OUTPREC) > 32) : 1)
2484 /* Specify the machine mode that pointers have.
2485 After generation of rtl, the compiler makes no further distinction
2486 between pointers and any other objects of this machine mode. */
2489 #define Pmode (TARGET_64BIT && TARGET_LONG64 ? DImode : SImode)
2492 /* Give call MEMs SImode since it is the "most permissive" mode
2493 for both 32-bit and 64-bit targets. */
2495 #define FUNCTION_MODE SImode
2498 /* A C expression for the cost of moving data from a register in
2499 class FROM to one in class TO. The classes are expressed using
2500 the enumeration values such as `GENERAL_REGS'. A value of 2 is
2501 the default; other values are interpreted relative to that.
2503 It is not required that the cost always equal 2 when FROM is the
2504 same as TO; on some machines it is expensive to move between
2505 registers if they are not general registers.
2507 If reload sees an insn consisting of a single `set' between two
2508 hard registers, and if `REGISTER_MOVE_COST' applied to their
2509 classes returns a value of 2, reload does not check to ensure
2510 that the constraints of the insn are met. Setting a cost of
2511 other than 2 will allow reload to verify that the constraints are
2512 met. You should do this if the `movM' pattern's constraints do
2513 not allow such copying. */
2515 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
2516 mips_register_move_cost (MODE, FROM, TO)
2518 #define MEMORY_MOVE_COST(MODE,CLASS,TO_P) \
2519 (mips_cost->memory_latency \
2520 + memory_move_secondary_cost ((MODE), (CLASS), (TO_P)))
2522 /* Define if copies to/from condition code registers should be avoided.
2524 This is needed for the MIPS because reload_outcc is not complete;
2525 it needs to handle cases where the source is a general or another
2526 condition code register. */
2527 #define AVOID_CCMODE_COPIES
2529 /* A C expression for the cost of a branch instruction. A value of
2530 1 is the default; other values are interpreted relative to that. */
2532 #define BRANCH_COST mips_branch_cost
2533 #define LOGICAL_OP_NON_SHORT_CIRCUIT 0
2535 /* If defined, modifies the length assigned to instruction INSN as a
2536 function of the context in which it is used. LENGTH is an lvalue
2537 that contains the initially computed length of the insn and should
2538 be updated with the correct length of the insn. */
2539 #define ADJUST_INSN_LENGTH(INSN, LENGTH) \
2540 ((LENGTH) = mips_adjust_insn_length ((INSN), (LENGTH)))
2542 /* Return the asm template for a non-MIPS16 conditional branch instruction.
2543 OPCODE is the opcode's mnemonic and OPERANDS is the asm template for
2545 #define MIPS_BRANCH(OPCODE, OPERANDS) \
2546 "%*" OPCODE "%?\t" OPERANDS "%/"
2548 /* Return the asm template for a call. INSN is the instruction's mnemonic
2549 ("j" or "jal"), OPERANDS are its operands, and OPNO is the operand number
2552 When generating GOT code without explicit relocation operators,
2553 all calls should use assembly macros. Otherwise, all indirect
2554 calls should use "jr" or "jalr"; we will arrange to restore $gp
2555 afterwards if necessary. Finally, we can only generate direct
2556 calls for -mabicalls by temporarily switching to non-PIC mode. */
2557 #define MIPS_CALL(INSN, OPERANDS, OPNO) \
2558 (TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS \
2559 ? "%*" INSN "\t%" #OPNO "%/" \
2560 : REG_P (OPERANDS[OPNO]) \
2561 ? "%*" INSN "r\t%" #OPNO "%/" \
2563 ? (".option\tpic0\n\t" \
2564 "%*" INSN "\t%" #OPNO "%/\n\t" \
2566 : "%*" INSN "\t%" #OPNO "%/")
2568 /* Control the assembler format that we output. */
2570 /* Output to assembler file text saying following lines
2571 may contain character constants, extra white space, comments, etc. */
2574 #define ASM_APP_ON " #APP\n"
2577 /* Output to assembler file text saying following lines
2578 no longer contain unusual constructs. */
2581 #define ASM_APP_OFF " #NO_APP\n"
2584 #define REGISTER_NAMES \
2585 { "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \
2586 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \
2587 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \
2588 "$24", "$25", "$26", "$27", "$28", "$sp", "$fp", "$31", \
2589 "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", \
2590 "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", \
2591 "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23", \
2592 "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31", \
2593 "hi", "lo", "", "$fcc0","$fcc1","$fcc2","$fcc3","$fcc4", \
2594 "$fcc5","$fcc6","$fcc7","", "", "$arg", "$frame", "$fakec", \
2595 "$c0r0", "$c0r1", "$c0r2", "$c0r3", "$c0r4", "$c0r5", "$c0r6", "$c0r7", \
2596 "$c0r8", "$c0r9", "$c0r10","$c0r11","$c0r12","$c0r13","$c0r14","$c0r15", \
2597 "$c0r16","$c0r17","$c0r18","$c0r19","$c0r20","$c0r21","$c0r22","$c0r23", \
2598 "$c0r24","$c0r25","$c0r26","$c0r27","$c0r28","$c0r29","$c0r30","$c0r31", \
2599 "$c2r0", "$c2r1", "$c2r2", "$c2r3", "$c2r4", "$c2r5", "$c2r6", "$c2r7", \
2600 "$c2r8", "$c2r9", "$c2r10","$c2r11","$c2r12","$c2r13","$c2r14","$c2r15", \
2601 "$c2r16","$c2r17","$c2r18","$c2r19","$c2r20","$c2r21","$c2r22","$c2r23", \
2602 "$c2r24","$c2r25","$c2r26","$c2r27","$c2r28","$c2r29","$c2r30","$c2r31", \
2603 "$c3r0", "$c3r1", "$c3r2", "$c3r3", "$c3r4", "$c3r5", "$c3r6", "$c3r7", \
2604 "$c3r8", "$c3r9", "$c3r10","$c3r11","$c3r12","$c3r13","$c3r14","$c3r15", \
2605 "$c3r16","$c3r17","$c3r18","$c3r19","$c3r20","$c3r21","$c3r22","$c3r23", \
2606 "$c3r24","$c3r25","$c3r26","$c3r27","$c3r28","$c3r29","$c3r30","$c3r31", \
2607 "$ac1hi","$ac1lo","$ac2hi","$ac2lo","$ac3hi","$ac3lo","$dsp_po","$dsp_sc", \
2608 "$dsp_ca","$dsp_ou","$dsp_cc","$dsp_ef" }
2610 /* List the "software" names for each register. Also list the numerical
2611 names for $fp and $sp. */
2613 #define ADDITIONAL_REGISTER_NAMES \
2615 { "$29", 29 + GP_REG_FIRST }, \
2616 { "$30", 30 + GP_REG_FIRST }, \
2617 { "at", 1 + GP_REG_FIRST }, \
2618 { "v0", 2 + GP_REG_FIRST }, \
2619 { "v1", 3 + GP_REG_FIRST }, \
2620 { "a0", 4 + GP_REG_FIRST }, \
2621 { "a1", 5 + GP_REG_FIRST }, \
2622 { "a2", 6 + GP_REG_FIRST }, \
2623 { "a3", 7 + GP_REG_FIRST }, \
2624 { "t0", 8 + GP_REG_FIRST }, \
2625 { "t1", 9 + GP_REG_FIRST }, \
2626 { "t2", 10 + GP_REG_FIRST }, \
2627 { "t3", 11 + GP_REG_FIRST }, \
2628 { "t4", 12 + GP_REG_FIRST }, \
2629 { "t5", 13 + GP_REG_FIRST }, \
2630 { "t6", 14 + GP_REG_FIRST }, \
2631 { "t7", 15 + GP_REG_FIRST }, \
2632 { "s0", 16 + GP_REG_FIRST }, \
2633 { "s1", 17 + GP_REG_FIRST }, \
2634 { "s2", 18 + GP_REG_FIRST }, \
2635 { "s3", 19 + GP_REG_FIRST }, \
2636 { "s4", 20 + GP_REG_FIRST }, \
2637 { "s5", 21 + GP_REG_FIRST }, \
2638 { "s6", 22 + GP_REG_FIRST }, \
2639 { "s7", 23 + GP_REG_FIRST }, \
2640 { "t8", 24 + GP_REG_FIRST }, \
2641 { "t9", 25 + GP_REG_FIRST }, \
2642 { "k0", 26 + GP_REG_FIRST }, \
2643 { "k1", 27 + GP_REG_FIRST }, \
2644 { "gp", 28 + GP_REG_FIRST }, \
2645 { "sp", 29 + GP_REG_FIRST }, \
2646 { "fp", 30 + GP_REG_FIRST }, \
2647 { "ra", 31 + GP_REG_FIRST }, \
2648 ALL_COP_ADDITIONAL_REGISTER_NAMES \
2651 /* This is meant to be redefined in the host dependent files. It is a
2652 set of alternative names and regnums for mips coprocessors. */
2654 #define ALL_COP_ADDITIONAL_REGISTER_NAMES
2656 #define PRINT_OPERAND mips_print_operand
2657 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) mips_print_operand_punct[CODE]
2658 #define PRINT_OPERAND_ADDRESS mips_print_operand_address
2660 /* A C statement, to be executed after all slot-filler instructions
2661 have been output. If necessary, call `dbr_sequence_length' to
2662 determine the number of slots filled in a sequence (zero if not
2663 currently outputting a sequence), to decide how many no-ops to
2664 output, or whatever.
2666 Don't define this macro if it has nothing to do, but it is
2667 helpful in reading assembly output if the extent of the delay
2668 sequence is made explicit (e.g. with white space).
2670 Note that output routines for instructions with delay slots must
2671 be prepared to deal with not being output as part of a sequence
2672 (i.e. when the scheduling pass is not run, or when no slot
2673 fillers could be found.) The variable `final_sequence' is null
2674 when not processing a sequence, otherwise it contains the
2675 `sequence' rtx being output. */
2677 #define DBR_OUTPUT_SEQEND(STREAM) \
2680 if (set_nomacro > 0 && --set_nomacro == 0) \
2681 fputs ("\t.set\tmacro\n", STREAM); \
2683 if (set_noreorder > 0 && --set_noreorder == 0) \
2684 fputs ("\t.set\treorder\n", STREAM); \
2686 fputs ("\n", STREAM); \
2690 /* How to tell the debugger about changes of source files. */
2691 #define ASM_OUTPUT_SOURCE_FILENAME mips_output_filename
2693 /* mips-tfile does not understand .stabd directives. */
2694 #define DBX_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) do { \
2695 dbxout_begin_stabn_sline (LINE); \
2696 dbxout_stab_value_internal_label ("LM", &COUNTER); \
2699 /* Use .loc directives for SDB line numbers. */
2700 #define SDB_OUTPUT_SOURCE_LINE(STREAM, LINE) \
2701 fprintf (STREAM, "\t.loc\t%d %d\n", num_source_filenames, LINE)
2703 /* The MIPS implementation uses some labels for its own purpose. The
2704 following lists what labels are created, and are all formed by the
2705 pattern $L[a-z].*. The machine independent portion of GCC creates
2706 labels matching: $L[A-Z][0-9]+ and $L[0-9]+.
2708 LM[0-9]+ Silicon Graphics/ECOFF stabs label before each stmt.
2709 $Lb[0-9]+ Begin blocks for MIPS debug support
2710 $Lc[0-9]+ Label for use in s<xx> operation.
2711 $Le[0-9]+ End blocks for MIPS debug support */
2713 #undef ASM_DECLARE_OBJECT_NAME
2714 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
2715 mips_declare_object (STREAM, NAME, "", ":\n")
2717 /* Globalizing directive for a label. */
2718 #define GLOBAL_ASM_OP "\t.globl\t"
2720 /* This says how to define a global common symbol. */
2722 #define ASM_OUTPUT_ALIGNED_DECL_COMMON mips_output_aligned_decl_common
2724 /* This says how to define a local common symbol (i.e., not visible to
2727 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
2728 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN) \
2729 mips_declare_common_object (STREAM, NAME, "\n\t.lcomm\t", SIZE, ALIGN, false)
2732 /* This says how to output an external. It would be possible not to
2733 output anything and let undefined symbol become external. However
2734 the assembler uses length information on externals to allocate in
2735 data/sdata bss/sbss, thereby saving exec time. */
2737 #undef ASM_OUTPUT_EXTERNAL
2738 #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME) \
2739 mips_output_external(STREAM,DECL,NAME)
2741 /* This is how to declare a function name. The actual work of
2742 emitting the label is moved to function_prologue, so that we can
2743 get the line number correctly emitted before the .ent directive,
2744 and after any .file directives. Define as empty so that the function
2745 is not declared before the .ent directive elsewhere. */
2747 #undef ASM_DECLARE_FUNCTION_NAME
2748 #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL)
2750 /* This is how to store into the string LABEL
2751 the symbol_ref name of an internal numbered label where
2752 PREFIX is the class of label and NUM is the number within the class.
2753 This is suitable for output with `assemble_name'. */
2755 #undef ASM_GENERATE_INTERNAL_LABEL
2756 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
2757 sprintf ((LABEL), "*%s%s%ld", (LOCAL_LABEL_PREFIX), (PREFIX), (long)(NUM))
2759 /* This is how to output an element of a case-vector that is absolute. */
2761 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
2762 fprintf (STREAM, "\t%s\t%sL%d\n", \
2763 ptr_mode == DImode ? ".dword" : ".word", \
2764 LOCAL_LABEL_PREFIX, \
2767 /* This is how to output an element of a case-vector. We can make the
2768 entries PC-relative in MIPS16 code and GP-relative when .gp(d)word
2771 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
2773 if (TARGET_MIPS16_SHORT_JUMP_TABLES) \
2774 fprintf (STREAM, "\t.half\t%sL%d-%sL%d\n", \
2775 LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL); \
2776 else if (TARGET_GPWORD) \
2777 fprintf (STREAM, "\t%s\t%sL%d\n", \
2778 ptr_mode == DImode ? ".gpdword" : ".gpword", \
2779 LOCAL_LABEL_PREFIX, VALUE); \
2780 else if (TARGET_RTP_PIC) \
2782 /* Make the entry relative to the start of the function. */ \
2783 rtx fnsym = XEXP (DECL_RTL (current_function_decl), 0); \
2784 fprintf (STREAM, "\t%s\t%sL%d-", \
2785 Pmode == DImode ? ".dword" : ".word", \
2786 LOCAL_LABEL_PREFIX, VALUE); \
2787 assemble_name (STREAM, XSTR (fnsym, 0)); \
2788 fprintf (STREAM, "\n"); \
2791 fprintf (STREAM, "\t%s\t%sL%d\n", \
2792 ptr_mode == DImode ? ".dword" : ".word", \
2793 LOCAL_LABEL_PREFIX, VALUE); \
2796 /* This is how to output an assembler line
2797 that says to advance the location counter
2798 to a multiple of 2**LOG bytes. */
2800 #define ASM_OUTPUT_ALIGN(STREAM,LOG) \
2801 fprintf (STREAM, "\t.align\t%d\n", (LOG))
2803 /* This is how to output an assembler line to advance the location
2804 counter by SIZE bytes. */
2806 #undef ASM_OUTPUT_SKIP
2807 #define ASM_OUTPUT_SKIP(STREAM,SIZE) \
2808 fprintf (STREAM, "\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))
2810 /* This is how to output a string. */
2811 #undef ASM_OUTPUT_ASCII
2812 #define ASM_OUTPUT_ASCII mips_output_ascii
2814 /* Output #ident as a in the read-only data section. */
2815 #undef ASM_OUTPUT_IDENT
2816 #define ASM_OUTPUT_IDENT(FILE, STRING) \
2818 const char *p = STRING; \
2819 int size = strlen (p) + 1; \
2820 switch_to_section (readonly_data_section); \
2821 assemble_string (p, size); \
2824 /* Default to -G 8 */
2825 #ifndef MIPS_DEFAULT_GVALUE
2826 #define MIPS_DEFAULT_GVALUE 8
2829 /* Define the strings to put out for each section in the object file. */
2830 #define TEXT_SECTION_ASM_OP "\t.text" /* instructions */
2831 #define DATA_SECTION_ASM_OP "\t.data" /* large data */
2833 #undef READONLY_DATA_SECTION_ASM_OP
2834 #define READONLY_DATA_SECTION_ASM_OP "\t.rdata" /* read-only data */
2836 #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \
2839 fprintf (STREAM, "\t%s\t%s,%s,-8\n\t%s\t%s,0(%s)\n", \
2840 TARGET_64BIT ? "daddiu" : "addiu", \
2841 reg_names[STACK_POINTER_REGNUM], \
2842 reg_names[STACK_POINTER_REGNUM], \
2843 TARGET_64BIT ? "sd" : "sw", \
2845 reg_names[STACK_POINTER_REGNUM]); \
2849 #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \
2852 if (! set_noreorder) \
2853 fprintf (STREAM, "\t.set\tnoreorder\n"); \
2855 fprintf (STREAM, "\t%s\t%s,0(%s)\n\t%s\t%s,%s,8\n", \
2856 TARGET_64BIT ? "ld" : "lw", \
2858 reg_names[STACK_POINTER_REGNUM], \
2859 TARGET_64BIT ? "daddu" : "addu", \
2860 reg_names[STACK_POINTER_REGNUM], \
2861 reg_names[STACK_POINTER_REGNUM]); \
2863 if (! set_noreorder) \
2864 fprintf (STREAM, "\t.set\treorder\n"); \
2868 /* How to start an assembler comment.
2869 The leading space is important (the mips native assembler requires it). */
2870 #ifndef ASM_COMMENT_START
2871 #define ASM_COMMENT_START " #"
2874 /* Default definitions for size_t and ptrdiff_t. We must override the
2875 definitions from ../svr4.h on mips-*-linux-gnu. */
2878 #define SIZE_TYPE (POINTER_SIZE == 64 ? "long unsigned int" : "unsigned int")
2881 #define PTRDIFF_TYPE (POINTER_SIZE == 64 ? "long int" : "int")
2883 /* The maximum number of bytes that can be copied by one iteration of
2884 a movmemsi loop; see mips_block_move_loop. */
2885 #define MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER \
2886 (UNITS_PER_WORD * 4)
2888 /* The maximum number of bytes that can be copied by a straight-line
2889 implementation of movmemsi; see mips_block_move_straight. We want
2890 to make sure that any loop-based implementation will iterate at
2892 #define MIPS_MAX_MOVE_BYTES_STRAIGHT \
2893 (MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER * 2)
2895 /* The base cost of a memcpy call, for MOVE_RATIO and friends. These
2896 values were determined experimentally by benchmarking with CSiBE.
2897 In theory, the call overhead is higher for TARGET_ABICALLS (especially
2898 for o32 where we have to restore $gp afterwards as well as make an
2899 indirect call), but in practice, bumping this up higher for
2900 TARGET_ABICALLS doesn't make much difference to code size. */
2902 #define MIPS_CALL_RATIO 8
2904 /* Any loop-based implementation of movmemsi will have at least
2905 MIPS_MAX_MOVE_BYTES_STRAIGHT / UNITS_PER_WORD memory-to-memory
2906 moves, so allow individual copies of fewer elements.
2908 When movmemsi is not available, use a value approximating
2909 the length of a memcpy call sequence, so that move_by_pieces
2910 will generate inline code if it is shorter than a function call.
2911 Since move_by_pieces_ninsns counts memory-to-memory moves, but
2912 we'll have to generate a load/store pair for each, halve the
2913 value of MIPS_CALL_RATIO to take that into account. */
2915 #define MOVE_RATIO \
2917 ? MIPS_MAX_MOVE_BYTES_STRAIGHT / MOVE_MAX \
2918 : MIPS_CALL_RATIO / 2)
2920 /* movmemsi is meant to generate code that is at least as good as
2921 move_by_pieces. However, movmemsi effectively uses a by-pieces
2922 implementation both for moves smaller than a word and for word-aligned
2923 moves of no more than MIPS_MAX_MOVE_BYTES_STRAIGHT bytes. We should
2924 allow the tree-level optimisers to do such moves by pieces, as it
2925 often exposes other optimization opportunities. We might as well
2926 continue to use movmemsi at the rtl level though, as it produces
2927 better code when scheduling is disabled (such as at -O). */
2929 #define MOVE_BY_PIECES_P(SIZE, ALIGN) \
2931 ? (!currently_expanding_to_rtl \
2932 && ((ALIGN) < BITS_PER_WORD \
2933 ? (SIZE) < UNITS_PER_WORD \
2934 : (SIZE) <= MIPS_MAX_MOVE_BYTES_STRAIGHT)) \
2935 : (move_by_pieces_ninsns (SIZE, ALIGN, MOVE_MAX_PIECES + 1) \
2936 < (unsigned int) MOVE_RATIO))
2938 /* For CLEAR_RATIO, when optimizing for size, give a better estimate
2939 of the length of a memset call, but use the default otherwise. */
2941 #define CLEAR_RATIO \
2942 (optimize_size ? MIPS_CALL_RATIO : 15)
2944 /* This is similar to CLEAR_RATIO, but for a non-zero constant, so when
2945 optimizing for size adjust the ratio to account for the overhead of
2946 loading the constant and replicating it across the word. */
2949 (optimize_size ? MIPS_CALL_RATIO - 2 : 15)
2951 /* STORE_BY_PIECES_P can be used when copying a constant string, but
2952 in that case each word takes 3 insns (lui, ori, sw), or more in
2953 64-bit mode, instead of 2 (lw, sw). For now we always fail this
2954 and let the move_by_pieces code copy the string from read-only
2955 memory. In the future, this could be tuned further for multi-issue
2956 CPUs that can issue stores down one pipe and arithmetic instructions
2957 down another; in that case, the lui/ori/sw combination would be a
2958 win for long enough strings. */
2960 #define STORE_BY_PIECES_P(SIZE, ALIGN) 0
2963 /* Since the bits of the _init and _fini function is spread across
2964 many object files, each potentially with its own GP, we must assume
2965 we need to load our GP. We don't preserve $gp or $ra, since each
2966 init/fini chunk is supposed to initialize $gp, and crti/crtn
2967 already take care of preserving $ra and, when appropriate, $gp. */
2968 #if (defined _ABIO32 && _MIPS_SIM == _ABIO32)
2969 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
2970 asm (SECTION_OP "\n\
2976 jal " USER_LABEL_PREFIX #FUNC "\n\
2977 " TEXT_SECTION_ASM_OP);
2978 #endif /* Switch to #elif when we're no longer limited by K&R C. */
2979 #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
2980 || (defined _ABI64 && _MIPS_SIM == _ABI64)
2981 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
2982 asm (SECTION_OP "\n\
2987 .cpsetup $31, $2, 1b\n\
2988 jal " USER_LABEL_PREFIX #FUNC "\n\
2989 " TEXT_SECTION_ASM_OP);
2994 #define HAVE_AS_TLS 0
2997 /* Return an asm string that atomically:
2999 - Compares memory reference %1 to register %2 and, if they are
3000 equal, changes %1 to %3.
3002 - Sets register %0 to the old value of memory reference %1.
3004 SUFFIX is the suffix that should be added to "ll" and "sc" instructions
3005 and OP is the instruction that should be used to load %3 into a
3007 #define MIPS_COMPARE_AND_SWAP(SUFFIX, OP) \
3009 "1:\tll" SUFFIX "\t%0,%1\n" \
3010 "\tbne\t%0,%z2,2f\n" \
3011 "\t" OP "\t%@,%3\n" \
3012 "\tsc" SUFFIX "\t%@,%1\n" \
3013 "\tbeq\t%@,%.,1b\n" \
3015 "\tsync%-%]%>%)\n" \
3018 /* Return an asm string that atomically:
3020 - Given that %2 contains a bit mask and %3 the inverted mask and
3021 that %4 and %5 have already been ANDed with %2.
3023 - Compares the bits in memory reference %1 selected by mask %2 to
3024 register %4 and, if they are equal, changes the selected bits
3027 - Sets register %0 to the old value of memory reference %1.
3029 OPS are the instructions needed to OR %5 with %@. */
3030 #define MIPS_COMPARE_AND_SWAP_12(OPS) \
3033 "\tand\t%@,%0,%2\n" \
3034 "\tbne\t%@,%z4,2f\n" \
3035 "\tand\t%@,%0,%3\n" \
3038 "\tbeq\t%@,%.,1b\n" \
3040 "\tsync%-%]%>%)\n" \
3043 #define MIPS_COMPARE_AND_SWAP_12_ZERO_OP ""
3044 #define MIPS_COMPARE_AND_SWAP_12_NONZERO_OP "\tor\t%@,%@,%5\n"
3047 /* Return an asm string that atomically:
3049 - Sets memory reference %0 to %0 INSN %1.
3051 SUFFIX is the suffix that should be added to "ll" and "sc"
3053 #define MIPS_SYNC_OP(SUFFIX, INSN) \
3055 "1:\tll" SUFFIX "\t%@,%0\n" \
3056 "\t" INSN "\t%@,%@,%1\n" \
3057 "\tsc" SUFFIX "\t%@,%0\n" \
3058 "\tbeq\t%@,%.,1b\n" \
3062 /* Return an asm string that atomically:
3064 - Given that %1 contains a bit mask and %2 the inverted mask and
3065 that %3 has already been ANDed with %1.
3067 - Sets the selected bits of memory reference %0 to %0 INSN %3.
3069 - Uses scratch register %4.
3071 NOT_OP are the optional instructions to do a bit-wise not
3072 operation in conjunction with an AND INSN to generate a sync_nand
3074 #define MIPS_SYNC_OP_12(INSN, NOT_OP) \
3077 "\tand\t%@,%4,%2\n" \
3079 "\t" INSN "\t%4,%4,%z3\n" \
3080 "\tand\t%4,%4,%1\n" \
3081 "\tor\t%@,%@,%4\n" \
3083 "\tbeq\t%@,%.,1b\n" \
3087 #define MIPS_SYNC_OP_12_NOT_NOP ""
3088 #define MIPS_SYNC_OP_12_NOT_NOT "\tnor\t%4,%4,%.\n"
3090 /* Return an asm string that atomically:
3092 - Given that %2 contains a bit mask and %3 the inverted mask and
3093 that %4 has already been ANDed with %2.
3095 - Sets the selected bits of memory reference %1 to %1 INSN %4.
3097 - Sets %0 to the original value of %1.
3099 - Uses scratch register %5.
3101 NOT_OP are the optional instructions to do a bit-wise not
3102 operation in conjunction with an AND INSN to generate a sync_nand
3105 REG is used in conjunction with NOT_OP and is used to select the
3106 register operated on by the INSN. */
3107 #define MIPS_SYNC_OLD_OP_12(INSN, NOT_OP, REG) \
3110 "\tand\t%@,%0,%3\n" \
3112 "\t" INSN "\t%5," REG ",%z4\n" \
3113 "\tand\t%5,%5,%2\n" \
3114 "\tor\t%@,%@,%5\n" \
3116 "\tbeq\t%@,%.,1b\n" \
3120 #define MIPS_SYNC_OLD_OP_12_NOT_NOP ""
3121 #define MIPS_SYNC_OLD_OP_12_NOT_NOP_REG "%0"
3122 #define MIPS_SYNC_OLD_OP_12_NOT_NOT "\tnor\t%5,%0,%.\n"
3123 #define MIPS_SYNC_OLD_OP_12_NOT_NOT_REG "%5"
3125 /* Return an asm string that atomically:
3127 - Given that %2 contains a bit mask and %3 the inverted mask and
3128 that %4 has already been ANDed with %2.
3130 - Sets the selected bits of memory reference %1 to %1 INSN %4.
3132 - Sets %0 to the new value of %1.
3134 NOT_OP are the optional instructions to do a bit-wise not
3135 operation in conjunction with an AND INSN to generate a sync_nand
3137 #define MIPS_SYNC_NEW_OP_12(INSN, NOT_OP) \
3140 "\tand\t%@,%0,%3\n" \
3142 "\t" INSN "\t%0,%0,%z4\n" \
3143 "\tand\t%0,%0,%2\n" \
3144 "\tor\t%@,%@,%0\n" \
3146 "\tbeq\t%@,%.,1b\n" \
3150 #define MIPS_SYNC_NEW_OP_12_NOT_NOP ""
3151 #define MIPS_SYNC_NEW_OP_12_NOT_NOT "\tnor\t%0,%0,%.\n"
3153 /* Return an asm string that atomically:
3155 - Sets memory reference %1 to %1 INSN %2.
3157 - Sets register %0 to the old value of memory reference %1.
3159 SUFFIX is the suffix that should be added to "ll" and "sc"
3161 #define MIPS_SYNC_OLD_OP(SUFFIX, INSN) \
3163 "1:\tll" SUFFIX "\t%0,%1\n" \
3164 "\t" INSN "\t%@,%0,%2\n" \
3165 "\tsc" SUFFIX "\t%@,%1\n" \
3166 "\tbeq\t%@,%.,1b\n" \
3170 /* Return an asm string that atomically:
3172 - Sets memory reference %1 to %1 INSN %2.
3174 - Sets register %0 to the new value of memory reference %1.
3176 SUFFIX is the suffix that should be added to "ll" and "sc"
3178 #define MIPS_SYNC_NEW_OP(SUFFIX, INSN) \
3180 "1:\tll" SUFFIX "\t%0,%1\n" \
3181 "\t" INSN "\t%@,%0,%2\n" \
3182 "\tsc" SUFFIX "\t%@,%1\n" \
3183 "\tbeq\t%@,%.,1b\n" \
3184 "\t" INSN "\t%0,%0,%2\n" \
3187 /* Return an asm string that atomically:
3189 - Sets memory reference %0 to ~%0 AND %1.
3191 SUFFIX is the suffix that should be added to "ll" and "sc"
3192 instructions. INSN is the and instruction needed to and a register
3194 #define MIPS_SYNC_NAND(SUFFIX, INSN) \
3196 "1:\tll" SUFFIX "\t%@,%0\n" \
3197 "\tnor\t%@,%@,%.\n" \
3198 "\t" INSN "\t%@,%@,%1\n" \
3199 "\tsc" SUFFIX "\t%@,%0\n" \
3200 "\tbeq\t%@,%.,1b\n" \
3204 /* Return an asm string that atomically:
3206 - Sets memory reference %1 to ~%1 AND %2.
3208 - Sets register %0 to the old value of memory reference %1.
3210 SUFFIX is the suffix that should be added to "ll" and "sc"
3211 instructions. INSN is the and instruction needed to and a register
3213 #define MIPS_SYNC_OLD_NAND(SUFFIX, INSN) \
3215 "1:\tll" SUFFIX "\t%0,%1\n" \
3216 "\tnor\t%@,%0,%.\n" \
3217 "\t" INSN "\t%@,%@,%2\n" \
3218 "\tsc" SUFFIX "\t%@,%1\n" \
3219 "\tbeq\t%@,%.,1b\n" \
3223 /* Return an asm string that atomically:
3225 - Sets memory reference %1 to ~%1 AND %2.
3227 - Sets register %0 to the new value of memory reference %1.
3229 SUFFIX is the suffix that should be added to "ll" and "sc"
3230 instructions. INSN is the and instruction needed to and a register
3232 #define MIPS_SYNC_NEW_NAND(SUFFIX, INSN) \
3234 "1:\tll" SUFFIX "\t%0,%1\n" \
3235 "\tnor\t%0,%0,%.\n" \
3236 "\t" INSN "\t%@,%0,%2\n" \
3237 "\tsc" SUFFIX "\t%@,%1\n" \
3238 "\tbeq\t%@,%.,1b\n" \
3239 "\t" INSN "\t%0,%0,%2\n" \
3242 /* Return an asm string that atomically:
3244 - Sets memory reference %1 to %2.
3246 - Sets register %0 to the old value of memory reference %1.
3248 SUFFIX is the suffix that should be added to "ll" and "sc"
3249 instructions. OP is the and instruction that should be used to
3250 load %2 into a register. */
3251 #define MIPS_SYNC_EXCHANGE(SUFFIX, OP) \
3253 "1:\tll" SUFFIX "\t%0,%1\n" \
3254 "\t" OP "\t%@,%2\n" \
3255 "\tsc" SUFFIX "\t%@,%1\n" \
3256 "\tbeq\t%@,%.,1b\n" \
3260 /* Return an asm string that atomically:
3262 - Given that %2 contains an inclusive mask, %3 and exclusive mask
3263 and %4 has already been ANDed with the inclusive mask.
3265 - Sets bits selected by the inclusive mask of memory reference %1
3268 - Sets register %0 to the old value of memory reference %1.
3270 OPS are the instructions needed to OR %4 with %@.
3272 Operand %2 is unused, but needed as to give the test_and_set_12
3273 insn the five operands expected by the expander. */
3274 #define MIPS_SYNC_EXCHANGE_12(OPS) \
3277 "\tand\t%@,%0,%3\n" \
3280 "\tbeq\t%@,%.,1b\n" \
3284 #define MIPS_SYNC_EXCHANGE_12_ZERO_OP ""
3285 #define MIPS_SYNC_EXCHANGE_12_NONZERO_OP "\tor\t%@,%@,%4\n"
3287 #ifndef USED_FOR_TARGET
3288 extern const enum reg_class mips_regno_to_class[];
3289 extern bool mips_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
3290 extern bool mips_print_operand_punct[256];
3291 extern const char *current_function_file; /* filename current function is in */
3292 extern int num_source_filenames; /* current .file # */
3293 extern int set_noreorder; /* # of nested .set noreorder's */
3294 extern int set_nomacro; /* # of nested .set nomacro's */
3295 extern int mips_dbx_regno[];
3296 extern int mips_dwarf_regno[];
3297 extern bool mips_split_p[];
3298 extern bool mips_split_hi_p[];
3299 extern GTY(()) rtx cmp_operands[2];
3300 extern enum processor_type mips_arch; /* which cpu to codegen for */
3301 extern enum processor_type mips_tune; /* which cpu to schedule for */
3302 extern int mips_isa; /* architectural level */
3303 extern int mips_abi; /* which ABI to use */
3304 extern const struct mips_cpu_info *mips_arch_info;
3305 extern const struct mips_cpu_info *mips_tune_info;
3306 extern const struct mips_rtx_cost_data *mips_cost;
3307 extern bool mips_base_mips16;
3308 extern enum mips_code_readable_setting mips_code_readable;
3311 /* Enable querying of DFA units. */
3312 #define CPU_UNITS_QUERY 1
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