1 /* Definitions of target machine for GNU compiler, for ARM.
2 Copyright (C) 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003 Free Software Foundation, Inc.
4 Contributed by Pieter `Tiggr' Schoenmakers (rcpieter@win.tue.nl)
5 and Martin Simmons (@harleqn.co.uk).
6 More major hacks by Richard Earnshaw (rearnsha@arm.com)
7 Minor hacks by Nick Clifton (nickc@cygnus.com)
9 This file is part of GCC.
11 GCC is free software; you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published
13 by the Free Software Foundation; either version 2, or (at your
14 option) any later version.
16 GCC is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 License for more details.
21 You should have received a copy of the GNU General Public License
22 along with GCC; see the file COPYING. If not, write to
23 the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
24 MA 02111-1307, USA. */
29 /* Target CPU builtins. */
30 #define TARGET_CPU_CPP_BUILTINS() \
34 builtin_define ("__arm__"); \
36 builtin_define ("__thumb__"); \
40 builtin_define ("__ARMEB__"); \
42 builtin_define ("__THUMBEB__"); \
43 if (TARGET_LITTLE_WORDS) \
44 builtin_define ("__ARMWEL__"); \
48 builtin_define ("__ARMEL__"); \
50 builtin_define ("__THUMBEL__"); \
54 builtin_define ("__APCS_32__"); \
56 builtin_define ("__APCS_26__"); \
58 if (TARGET_SOFT_FLOAT) \
59 builtin_define ("__SOFTFP__"); \
61 /* FIXME: TARGET_HARD_FLOAT currently implies \
63 if (TARGET_VFP && !TARGET_HARD_FLOAT) \
64 builtin_define ("__VFP_FP__"); \
66 /* Add a define for interworking. \
67 Needed when building libgcc.a. */ \
68 if (TARGET_INTERWORK) \
69 builtin_define ("__THUMB_INTERWORK__"); \
71 builtin_assert ("cpu=arm"); \
72 builtin_assert ("machine=arm"); \
75 #define TARGET_CPU_arm2 0x0000
76 #define TARGET_CPU_arm250 0x0000
77 #define TARGET_CPU_arm3 0x0000
78 #define TARGET_CPU_arm6 0x0001
79 #define TARGET_CPU_arm600 0x0001
80 #define TARGET_CPU_arm610 0x0002
81 #define TARGET_CPU_arm7 0x0001
82 #define TARGET_CPU_arm7m 0x0004
83 #define TARGET_CPU_arm7dm 0x0004
84 #define TARGET_CPU_arm7dmi 0x0004
85 #define TARGET_CPU_arm700 0x0001
86 #define TARGET_CPU_arm710 0x0002
87 #define TARGET_CPU_arm7100 0x0002
88 #define TARGET_CPU_arm7500 0x0002
89 #define TARGET_CPU_arm7500fe 0x1001
90 #define TARGET_CPU_arm7tdmi 0x0008
91 #define TARGET_CPU_arm8 0x0010
92 #define TARGET_CPU_arm810 0x0020
93 #define TARGET_CPU_strongarm 0x0040
94 #define TARGET_CPU_strongarm110 0x0040
95 #define TARGET_CPU_strongarm1100 0x0040
96 #define TARGET_CPU_arm9 0x0080
97 #define TARGET_CPU_arm9tdmi 0x0080
98 #define TARGET_CPU_xscale 0x0100
99 #define TARGET_CPU_ep9312 0x0200
100 #define TARGET_CPU_iwmmxt 0x0400
101 #define TARGET_CPU_arm926ej_s 0x0800
102 #define TARGET_CPU_arm1026ej_s 0x1000
103 #define TARGET_CPU_arm1136j_s 0x2000
104 #define TARGET_CPU_arm1136jf_s 0x4000
105 /* Configure didn't specify. */
106 #define TARGET_CPU_generic 0x8000
108 typedef enum arm_cond_code
110 ARM_EQ = 0, ARM_NE, ARM_CS, ARM_CC, ARM_MI, ARM_PL, ARM_VS, ARM_VC,
111 ARM_HI, ARM_LS, ARM_GE, ARM_LT, ARM_GT, ARM_LE, ARM_AL, ARM_NV
115 extern arm_cc arm_current_cc;
117 #define ARM_INVERSE_CONDITION_CODE(X) ((arm_cc) (((int)X) ^ 1))
119 extern int arm_target_label;
120 extern int arm_ccfsm_state;
121 extern GTY(()) rtx arm_target_insn;
122 /* Run-time compilation parameters selecting different hardware subsets. */
123 extern int target_flags;
124 /* The floating point instruction architecture, can be 2 or 3 */
125 extern const char * target_fp_name;
126 /* Define the information needed to generate branch insns. This is
127 stored from the compare operation. */
128 extern GTY(()) rtx arm_compare_op0;
129 extern GTY(()) rtx arm_compare_op1;
130 /* The label of the current constant pool. */
131 extern rtx pool_vector_label;
132 /* Set to 1 when a return insn is output, this means that the epilogue
134 extern int return_used_this_function;
135 /* Used to produce AOF syntax assembler. */
136 extern GTY(()) rtx aof_pic_label;
138 /* Just in case configure has failed to define anything. */
139 #ifndef TARGET_CPU_DEFAULT
140 #define TARGET_CPU_DEFAULT TARGET_CPU_generic
143 /* If the configuration file doesn't specify the cpu, the subtarget may
144 override it. If it doesn't, then default to an ARM6. */
145 #if TARGET_CPU_DEFAULT == TARGET_CPU_generic
146 #undef TARGET_CPU_DEFAULT
148 #ifdef SUBTARGET_CPU_DEFAULT
149 #define TARGET_CPU_DEFAULT SUBTARGET_CPU_DEFAULT
151 #define TARGET_CPU_DEFAULT TARGET_CPU_arm6
155 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm2
156 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_2__"
158 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm6 || TARGET_CPU_DEFAULT == TARGET_CPU_arm610 || TARGET_CPU_DEFAULT == TARGET_CPU_arm7500fe
159 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_3__"
161 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm7m
162 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_3M__"
164 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm7tdmi || TARGET_CPU_DEFAULT == TARGET_CPU_arm9 || TARGET_CPU_DEFAULT == TARGET_CPU_arm9tdmi
165 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4T__"
167 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm8 || TARGET_CPU_DEFAULT == TARGET_CPU_arm810 || TARGET_CPU_DEFAULT == TARGET_CPU_strongarm || TARGET_CPU_DEFAULT == TARGET_CPU_strongarm110 || TARGET_CPU_DEFAULT == TARGET_CPU_strongarm1100
168 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4__"
170 #if TARGET_CPU_DEFAULT == TARGET_CPU_xscale
171 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_5TE__ -D__XSCALE__"
173 #if TARGET_CPU_DEFAULT == TARGET_CPU_ep9312
174 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4T__ -D__MAVERICK__"
175 /* Set TARGET_DEFAULT to the default, but without soft-float. */
176 #ifdef TARGET_DEFAULT
177 #undef TARGET_DEFAULT
178 #define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME)
181 #if TARGET_CPU_DEFAULT == TARGET_CPU_iwmmxt
182 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_5TE__ -D__XSCALE__ -D__IWMMXT__"
184 #error Unrecognized value in TARGET_CPU_DEFAULT.
195 #define CPP_SPEC "%(cpp_cpu_arch) %(subtarget_cpp_spec) \
196 %{mapcs-32:%{mapcs-26: \
197 %e-mapcs-26 and -mapcs-32 may not be used together}} \
198 %{msoft-float:%{mhard-float: \
199 %e-msoft-float and -mhard_float may not be used together}} \
200 %{mbig-endian:%{mlittle-endian: \
201 %e-mbig-endian and -mlittle-endian may not be used together}}"
203 /* Set the architecture define -- if -march= is set, then it overrides
204 the -mcpu= setting. */
205 #define CPP_CPU_ARCH_SPEC "\
206 %{march=arm2:-D__ARM_ARCH_2__} \
207 %{march=arm250:-D__ARM_ARCH_2__} \
208 %{march=arm3:-D__ARM_ARCH_2__} \
209 %{march=arm6:-D__ARM_ARCH_3__} \
210 %{march=arm600:-D__ARM_ARCH_3__} \
211 %{march=arm610:-D__ARM_ARCH_3__} \
212 %{march=arm7:-D__ARM_ARCH_3__} \
213 %{march=arm700:-D__ARM_ARCH_3__} \
214 %{march=arm710:-D__ARM_ARCH_3__} \
215 %{march=arm720:-D__ARM_ARCH_3__} \
216 %{march=arm7100:-D__ARM_ARCH_3__} \
217 %{march=arm7500:-D__ARM_ARCH_3__} \
218 %{march=arm7500fe:-D__ARM_ARCH_3__} \
219 %{march=arm7m:-D__ARM_ARCH_3M__} \
220 %{march=arm7dm:-D__ARM_ARCH_3M__} \
221 %{march=arm7dmi:-D__ARM_ARCH_3M__} \
222 %{march=arm7tdmi:-D__ARM_ARCH_4T__} \
223 %{march=arm8:-D__ARM_ARCH_4__} \
224 %{march=arm810:-D__ARM_ARCH_4__} \
225 %{march=arm9:-D__ARM_ARCH_4T__} \
226 %{march=arm920:-D__ARM_ARCH_4__} \
227 %{march=arm920t:-D__ARM_ARCH_4T__} \
228 %{march=arm9tdmi:-D__ARM_ARCH_4T__} \
229 %{march=strongarm:-D__ARM_ARCH_4__} \
230 %{march=strongarm110:-D__ARM_ARCH_4__} \
231 %{march=strongarm1100:-D__ARM_ARCH_4__} \
232 %{march=xscale:-D__ARM_ARCH_5TE__} \
233 %{march=xscale:-D__XSCALE__} \
234 %{march=ep9312:-D__ARM_ARCH_4T__} \
235 %{march=ep9312:-D__MAVERICK__} \
236 %{march=armv2:-D__ARM_ARCH_2__} \
237 %{march=armv2a:-D__ARM_ARCH_2__} \
238 %{march=armv3:-D__ARM_ARCH_3__} \
239 %{march=armv3m:-D__ARM_ARCH_3M__} \
240 %{march=armv4:-D__ARM_ARCH_4__} \
241 %{march=armv4t:-D__ARM_ARCH_4T__} \
242 %{march=armv5:-D__ARM_ARCH_5__} \
243 %{march=armv5t:-D__ARM_ARCH_5T__} \
244 %{march=armv5e:-D__ARM_ARCH_5E__} \
245 %{march=armv5te:-D__ARM_ARCH_5TE__} \
247 %{mcpu=arm2:-D__ARM_ARCH_2__} \
248 %{mcpu=arm250:-D__ARM_ARCH_2__} \
249 %{mcpu=arm3:-D__ARM_ARCH_2__} \
250 %{mcpu=arm6:-D__ARM_ARCH_3__} \
251 %{mcpu=arm600:-D__ARM_ARCH_3__} \
252 %{mcpu=arm610:-D__ARM_ARCH_3__} \
253 %{mcpu=arm7:-D__ARM_ARCH_3__} \
254 %{mcpu=arm700:-D__ARM_ARCH_3__} \
255 %{mcpu=arm710:-D__ARM_ARCH_3__} \
256 %{mcpu=arm720:-D__ARM_ARCH_3__} \
257 %{mcpu=arm7100:-D__ARM_ARCH_3__} \
258 %{mcpu=arm7500:-D__ARM_ARCH_3__} \
259 %{mcpu=arm7500fe:-D__ARM_ARCH_3__} \
260 %{mcpu=arm7m:-D__ARM_ARCH_3M__} \
261 %{mcpu=arm7dm:-D__ARM_ARCH_3M__} \
262 %{mcpu=arm7dmi:-D__ARM_ARCH_3M__} \
263 %{mcpu=arm7tdmi:-D__ARM_ARCH_4T__} \
264 %{mcpu=arm8:-D__ARM_ARCH_4__} \
265 %{mcpu=arm810:-D__ARM_ARCH_4__} \
266 %{mcpu=arm9:-D__ARM_ARCH_4T__} \
267 %{mcpu=arm920:-D__ARM_ARCH_4__} \
268 %{mcpu=arm920t:-D__ARM_ARCH_4T__} \
269 %{mcpu=arm9tdmi:-D__ARM_ARCH_4T__} \
270 %{mcpu=strongarm:-D__ARM_ARCH_4__} \
271 %{mcpu=strongarm110:-D__ARM_ARCH_4__} \
272 %{mcpu=strongarm1100:-D__ARM_ARCH_4__} \
273 %{mcpu=xscale:-D__ARM_ARCH_5TE__} \
274 %{mcpu=xscale:-D__XSCALE__} \
275 %{mcpu=ep9312:-D__ARM_ARCH_4T__} \
276 %{mcpu=ep9312:-D__MAVERICK__} \
277 %{mcpu=iwmmxt:-D__ARM_ARCH_5TE__} \
278 %{mcpu=iwmmxt:-D__XSCALE__} \
279 %{mcpu=iwmmxt:-D__IWMMXT__} \
280 %{!mcpu*:%(cpp_cpu_arch_default)}} \
287 /* This macro defines names of additional specifications to put in the specs
288 that can be used in various specifications like CC1_SPEC. Its definition
289 is an initializer with a subgrouping for each command option.
291 Each subgrouping contains a string constant, that defines the
292 specification name, and a string constant that used by the GCC driver
295 Do not define this macro if it does not need to do anything. */
296 #define EXTRA_SPECS \
297 { "cpp_cpu_arch", CPP_CPU_ARCH_SPEC }, \
298 { "cpp_cpu_arch_default", CPP_ARCH_DEFAULT_SPEC }, \
299 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \
300 SUBTARGET_EXTRA_SPECS
302 #ifndef SUBTARGET_EXTRA_SPECS
303 #define SUBTARGET_EXTRA_SPECS
306 #ifndef SUBTARGET_CPP_SPEC
307 #define SUBTARGET_CPP_SPEC ""
310 /* Run-time Target Specification. */
311 #ifndef TARGET_VERSION
312 #define TARGET_VERSION fputs (" (ARM/generic)", stderr);
315 /* Nonzero if the function prologue (and epilogue) should obey
316 the ARM Procedure Call Standard. */
317 #define ARM_FLAG_APCS_FRAME (1 << 0)
319 /* Nonzero if the function prologue should output the function name to enable
320 the post mortem debugger to print a backtrace (very useful on RISCOS,
321 unused on RISCiX). Specifying this flag also enables
322 -fno-omit-frame-pointer.
323 XXX Must still be implemented in the prologue. */
324 #define ARM_FLAG_POKE (1 << 1)
326 /* Nonzero if floating point instructions are emulated by the FPE, in which
327 case instruction scheduling becomes very uninteresting. */
328 #define ARM_FLAG_FPE (1 << 2)
330 /* Nonzero if destined for a processor in 32-bit program mode. Takes out bit
331 that assume restoration of the condition flags when returning from a
332 branch and link (ie a function). */
333 #define ARM_FLAG_APCS_32 (1 << 3)
335 /* FLAGS 0x0008 and 0x0010 are now spare (used to be arm3/6 selection). */
337 /* Nonzero if stack checking should be performed on entry to each function
338 which allocates temporary variables on the stack. */
339 #define ARM_FLAG_APCS_STACK (1 << 4)
341 /* Nonzero if floating point parameters should be passed to functions in
342 floating point registers. */
343 #define ARM_FLAG_APCS_FLOAT (1 << 5)
345 /* Nonzero if re-entrant, position independent code should be generated.
346 This is equivalent to -fpic. */
347 #define ARM_FLAG_APCS_REENT (1 << 6)
349 /* Nonzero if the MMU will trap unaligned word accesses, so shorts must
350 be loaded using either LDRH or LDRB instructions. */
351 #define ARM_FLAG_MMU_TRAPS (1 << 7)
353 /* Nonzero if all floating point instructions are missing (and there is no
354 emulator either). Generate function calls for all ops in this case. */
355 #define ARM_FLAG_SOFT_FLOAT (1 << 8)
357 /* Nonzero if we should compile with BYTES_BIG_ENDIAN set to 1. */
358 #define ARM_FLAG_BIG_END (1 << 9)
360 /* Nonzero if we should compile for Thumb interworking. */
361 #define ARM_FLAG_INTERWORK (1 << 10)
363 /* Nonzero if we should have little-endian words even when compiling for
364 big-endian (for backwards compatibility with older versions of GCC). */
365 #define ARM_FLAG_LITTLE_WORDS (1 << 11)
367 /* Nonzero if we need to protect the prolog from scheduling */
368 #define ARM_FLAG_NO_SCHED_PRO (1 << 12)
370 /* Nonzero if a call to abort should be generated if a noreturn
371 function tries to return. */
372 #define ARM_FLAG_ABORT_NORETURN (1 << 13)
374 /* Nonzero if function prologues should not load the PIC register. */
375 #define ARM_FLAG_SINGLE_PIC_BASE (1 << 14)
377 /* Nonzero if all call instructions should be indirect. */
378 #define ARM_FLAG_LONG_CALLS (1 << 15)
380 /* Nonzero means that the target ISA is the THUMB, not the ARM. */
381 #define ARM_FLAG_THUMB (1 << 16)
383 /* Set if a TPCS style stack frame should be generated, for non-leaf
384 functions, even if they do not need one. */
385 #define THUMB_FLAG_BACKTRACE (1 << 17)
387 /* Set if a TPCS style stack frame should be generated, for leaf
388 functions, even if they do not need one. */
389 #define THUMB_FLAG_LEAF_BACKTRACE (1 << 18)
391 /* Set if externally visible functions should assume that they
392 might be called in ARM mode, from a non-thumb aware code. */
393 #define THUMB_FLAG_CALLEE_SUPER_INTERWORKING (1 << 19)
395 /* Set if calls via function pointers should assume that their
396 destination is non-Thumb aware. */
397 #define THUMB_FLAG_CALLER_SUPER_INTERWORKING (1 << 20)
399 /* Nonzero means target uses VFP FP. */
400 #define ARM_FLAG_VFP (1 << 21)
402 /* Nonzero means to use ARM/Thumb Procedure Call Standard conventions. */
403 #define ARM_FLAG_ATPCS (1 << 22)
405 /* Fix invalid Cirrus instruction combinations by inserting NOPs. */
406 #define CIRRUS_FIX_INVALID_INSNS (1 << 23)
408 #define TARGET_APCS_FRAME (target_flags & ARM_FLAG_APCS_FRAME)
409 #define TARGET_POKE_FUNCTION_NAME (target_flags & ARM_FLAG_POKE)
410 #define TARGET_FPE (target_flags & ARM_FLAG_FPE)
411 #define TARGET_APCS_32 (target_flags & ARM_FLAG_APCS_32)
412 #define TARGET_APCS_STACK (target_flags & ARM_FLAG_APCS_STACK)
413 #define TARGET_APCS_FLOAT (target_flags & ARM_FLAG_APCS_FLOAT)
414 #define TARGET_APCS_REENT (target_flags & ARM_FLAG_APCS_REENT)
415 #define TARGET_ATPCS (target_flags & ARM_FLAG_ATPCS)
416 #define TARGET_MMU_TRAPS (target_flags & ARM_FLAG_MMU_TRAPS)
417 #define TARGET_SOFT_FLOAT (target_flags & ARM_FLAG_SOFT_FLOAT)
418 #define TARGET_HARD_FLOAT (! TARGET_SOFT_FLOAT)
419 #define TARGET_CIRRUS (arm_is_cirrus)
420 #define TARGET_ANY_HARD_FLOAT (TARGET_HARD_FLOAT || TARGET_CIRRUS)
421 #define TARGET_IWMMXT (arm_arch_iwmmxt)
422 #define TARGET_REALLY_IWMMXT (TARGET_IWMMXT && TARGET_ARM)
423 #define TARGET_VFP (target_flags & ARM_FLAG_VFP)
424 #define TARGET_BIG_END (target_flags & ARM_FLAG_BIG_END)
425 #define TARGET_INTERWORK (target_flags & ARM_FLAG_INTERWORK)
426 #define TARGET_LITTLE_WORDS (target_flags & ARM_FLAG_LITTLE_WORDS)
427 #define TARGET_NO_SCHED_PRO (target_flags & ARM_FLAG_NO_SCHED_PRO)
428 #define TARGET_ABORT_NORETURN (target_flags & ARM_FLAG_ABORT_NORETURN)
429 #define TARGET_SINGLE_PIC_BASE (target_flags & ARM_FLAG_SINGLE_PIC_BASE)
430 #define TARGET_LONG_CALLS (target_flags & ARM_FLAG_LONG_CALLS)
431 #define TARGET_THUMB (target_flags & ARM_FLAG_THUMB)
432 #define TARGET_ARM (! TARGET_THUMB)
433 #define TARGET_EITHER 1 /* (TARGET_ARM | TARGET_THUMB) */
434 #define TARGET_CALLEE_INTERWORKING (target_flags & THUMB_FLAG_CALLEE_SUPER_INTERWORKING)
435 #define TARGET_CALLER_INTERWORKING (target_flags & THUMB_FLAG_CALLER_SUPER_INTERWORKING)
436 #define TARGET_BACKTRACE (leaf_function_p () \
437 ? (target_flags & THUMB_FLAG_LEAF_BACKTRACE) \
438 : (target_flags & THUMB_FLAG_BACKTRACE))
439 #define TARGET_CIRRUS_FIX_INVALID_INSNS (target_flags & CIRRUS_FIX_INVALID_INSNS)
441 /* SUBTARGET_SWITCHES is used to add flags on a per-config basis. */
442 #ifndef SUBTARGET_SWITCHES
443 #define SUBTARGET_SWITCHES
446 #define TARGET_SWITCHES \
448 {"apcs", ARM_FLAG_APCS_FRAME, "" }, \
449 {"apcs-frame", ARM_FLAG_APCS_FRAME, \
450 N_("Generate APCS conformant stack frames") }, \
451 {"no-apcs-frame", -ARM_FLAG_APCS_FRAME, "" }, \
452 {"poke-function-name", ARM_FLAG_POKE, \
453 N_("Store function names in object code") }, \
454 {"no-poke-function-name", -ARM_FLAG_POKE, "" }, \
455 {"fpe", ARM_FLAG_FPE, "" }, \
456 {"apcs-32", ARM_FLAG_APCS_32, \
457 N_("Use the 32-bit version of the APCS") }, \
458 {"apcs-26", -ARM_FLAG_APCS_32, \
459 N_("Use the 26-bit version of the APCS") }, \
460 {"apcs-stack-check", ARM_FLAG_APCS_STACK, "" }, \
461 {"no-apcs-stack-check", -ARM_FLAG_APCS_STACK, "" }, \
462 {"apcs-float", ARM_FLAG_APCS_FLOAT, \
463 N_("Pass FP arguments in FP registers") }, \
464 {"no-apcs-float", -ARM_FLAG_APCS_FLOAT, "" }, \
465 {"apcs-reentrant", ARM_FLAG_APCS_REENT, \
466 N_("Generate re-entrant, PIC code") }, \
467 {"no-apcs-reentrant", -ARM_FLAG_APCS_REENT, "" }, \
468 {"alignment-traps", ARM_FLAG_MMU_TRAPS, \
469 N_("The MMU will trap on unaligned accesses") }, \
470 {"no-alignment-traps", -ARM_FLAG_MMU_TRAPS, "" }, \
471 {"short-load-bytes", ARM_FLAG_MMU_TRAPS, "" }, \
472 {"no-short-load-bytes", -ARM_FLAG_MMU_TRAPS, "" }, \
473 {"short-load-words", -ARM_FLAG_MMU_TRAPS, "" }, \
474 {"no-short-load-words", ARM_FLAG_MMU_TRAPS, "" }, \
475 {"soft-float", ARM_FLAG_SOFT_FLOAT, \
476 N_("Use library calls to perform FP operations") }, \
477 {"hard-float", -ARM_FLAG_SOFT_FLOAT, \
478 N_("Use hardware floating point instructions") }, \
479 {"big-endian", ARM_FLAG_BIG_END, \
480 N_("Assume target CPU is configured as big endian") }, \
481 {"little-endian", -ARM_FLAG_BIG_END, \
482 N_("Assume target CPU is configured as little endian") }, \
483 {"words-little-endian", ARM_FLAG_LITTLE_WORDS, \
484 N_("Assume big endian bytes, little endian words") }, \
485 {"thumb-interwork", ARM_FLAG_INTERWORK, \
486 N_("Support calls between Thumb and ARM instruction sets") }, \
487 {"no-thumb-interwork", -ARM_FLAG_INTERWORK, "" }, \
488 {"abort-on-noreturn", ARM_FLAG_ABORT_NORETURN, \
489 N_("Generate a call to abort if a noreturn function returns")}, \
490 {"no-abort-on-noreturn", -ARM_FLAG_ABORT_NORETURN, "" }, \
491 {"no-sched-prolog", ARM_FLAG_NO_SCHED_PRO, \
492 N_("Do not move instructions into a function's prologue") }, \
493 {"sched-prolog", -ARM_FLAG_NO_SCHED_PRO, "" }, \
494 {"single-pic-base", ARM_FLAG_SINGLE_PIC_BASE, \
495 N_("Do not load the PIC register in function prologues") }, \
496 {"no-single-pic-base", -ARM_FLAG_SINGLE_PIC_BASE, "" }, \
497 {"long-calls", ARM_FLAG_LONG_CALLS, \
498 N_("Generate call insns as indirect calls, if necessary") }, \
499 {"no-long-calls", -ARM_FLAG_LONG_CALLS, "" }, \
500 {"thumb", ARM_FLAG_THUMB, \
501 N_("Compile for the Thumb not the ARM") }, \
502 {"no-thumb", -ARM_FLAG_THUMB, "" }, \
503 {"arm", -ARM_FLAG_THUMB, "" }, \
504 {"tpcs-frame", THUMB_FLAG_BACKTRACE, \
505 N_("Thumb: Generate (non-leaf) stack frames even if not needed") }, \
506 {"no-tpcs-frame", -THUMB_FLAG_BACKTRACE, "" }, \
507 {"tpcs-leaf-frame", THUMB_FLAG_LEAF_BACKTRACE, \
508 N_("Thumb: Generate (leaf) stack frames even if not needed") }, \
509 {"no-tpcs-leaf-frame", -THUMB_FLAG_LEAF_BACKTRACE, "" }, \
510 {"callee-super-interworking", THUMB_FLAG_CALLEE_SUPER_INTERWORKING, \
511 N_("Thumb: Assume non-static functions may be called from ARM code") }, \
512 {"no-callee-super-interworking", -THUMB_FLAG_CALLEE_SUPER_INTERWORKING, \
514 {"caller-super-interworking", THUMB_FLAG_CALLER_SUPER_INTERWORKING, \
515 N_("Thumb: Assume function pointers may go to non-Thumb aware code") }, \
516 {"no-caller-super-interworking", -THUMB_FLAG_CALLER_SUPER_INTERWORKING, \
518 {"cirrus-fix-invalid-insns", CIRRUS_FIX_INVALID_INSNS, \
519 N_("Cirrus: Place NOPs to avoid invalid instruction combinations") }, \
520 {"no-cirrus-fix-invalid-insns", -CIRRUS_FIX_INVALID_INSNS, \
521 N_("Cirrus: Do not break up invalid instruction combinations with NOPs") },\
523 {"", TARGET_DEFAULT, "" } \
526 #define TARGET_OPTIONS \
528 {"cpu=", & arm_select[0].string, \
529 N_("Specify the name of the target CPU"), 0}, \
530 {"arch=", & arm_select[1].string, \
531 N_("Specify the name of the target architecture"), 0}, \
532 {"tune=", & arm_select[2].string, "", 0}, \
533 {"fpe=", & target_fp_name, "" , 0}, \
534 {"fp=", & target_fp_name, \
535 N_("Specify the version of the floating point emulator"), 0},\
536 {"structure-size-boundary=", & structure_size_string, \
537 N_("Specify the minimum bit alignment of structures"), 0}, \
538 {"pic-register=", & arm_pic_register_string, \
539 N_("Specify the register to be used for PIC addressing"), 0} \
542 /* Support for a compile-time default CPU, et cetera. The rules are:
543 --with-arch is ignored if -march or -mcpu are specified.
544 --with-cpu is ignored if -march or -mcpu are specified, and is overridden
546 --with-tune is ignored if -mtune or -mcpu are specified (but not affected
548 --with-float is ignored if -mhard-float or -msoft-float are
550 #define OPTION_DEFAULT_SPECS \
551 {"arch", "%{!march=*:%{!mcpu=*:-march=%(VALUE)}}" }, \
552 {"cpu", "%{!march=*:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
553 {"tune", "%{!mcpu=*:%{!mtune=*:-mtune=%(VALUE)}}" }, \
554 {"float", "%{!msoft-float:%{!mhard-float:-m%(VALUE)-float}}" }
556 struct arm_cpu_select
560 const struct processors * processors;
563 /* This is a magic array. If the user specifies a command line switch
564 which matches one of the entries in TARGET_OPTIONS then the corresponding
565 string pointer will be set to the value specified by the user. */
566 extern struct arm_cpu_select arm_select[];
574 /* Recast the program mode class to be the prog_mode attribute */
575 #define arm_prog_mode ((enum attr_prog_mode) arm_prgmode)
577 extern enum prog_mode_type arm_prgmode;
579 /* What sort of floating point unit do we have? Hardware or software.
580 If software, is it issue 2 or issue 3? */
583 /* Software floating point, FPA style double fmt. */
585 /* Full FPA support. */
587 /* Emulated FPA hardware, Issue 2 emulator (no LFM/SFM). */
589 /* Emulated FPA hardware, Issue 3 emulator. */
591 /* Cirrus Maverick floating point co-processor. */
595 /* Recast the floating point class to be the floating point attribute. */
596 #define arm_fpu_attr ((enum attr_fpu) arm_fpu_tune)
598 /* What type of floating point to tune for */
599 extern enum fputype arm_fpu_tune;
601 /* What type of floating point instructions are available */
602 extern enum fputype arm_fpu_arch;
604 /* Default floating point architecture. Override in sub-target if
606 #ifndef FPUTYPE_DEFAULT
607 #define FPUTYPE_DEFAULT FPUTYPE_FPA_EMU2
610 #if TARGET_CPU_DEFAULT == TARGET_CPU_ep9312
611 #undef FPUTYPE_DEFAULT
612 #define FPUTYPE_DEFAULT FPUTYPE_MAVERICK
615 /* Nonzero if the processor has a fast multiply insn, and one that does
616 a 64-bit multiply of two 32-bit values. */
617 extern int arm_fast_multiply;
619 /* Nonzero if this chip supports the ARM Architecture 4 extensions */
620 extern int arm_arch4;
622 /* Nonzero if this chip supports the ARM Architecture 5 extensions */
623 extern int arm_arch5;
625 /* Nonzero if this chip supports the ARM Architecture 5E extensions */
626 extern int arm_arch5e;
628 /* Nonzero if this chip can benefit from load scheduling. */
629 extern int arm_ld_sched;
631 /* Nonzero if generating thumb code. */
632 extern int thumb_code;
634 /* Nonzero if this chip is a StrongARM. */
635 extern int arm_is_strong;
637 /* Nonzero if this chip is a Cirrus variant. */
638 extern int arm_is_cirrus;
640 /* Nonzero if this chip supports Intel XScale with Wireless MMX technology. */
641 extern int arm_arch_iwmmxt;
643 /* Nonzero if this chip is an XScale. */
644 extern int arm_arch_xscale;
646 /* Nonzero if tuning for XScale */
647 extern int arm_tune_xscale;
649 /* Nonzero if this chip is an ARM6 or an ARM7. */
650 extern int arm_is_6_or_7;
652 #ifndef TARGET_DEFAULT
653 #define TARGET_DEFAULT (ARM_FLAG_APCS_FRAME)
656 /* The frame pointer register used in gcc has nothing to do with debugging;
657 that is controlled by the APCS-FRAME option. */
658 #define CAN_DEBUG_WITHOUT_FP
660 #undef TARGET_MEM_FUNCTIONS
661 #define TARGET_MEM_FUNCTIONS 1
663 #define OVERRIDE_OPTIONS arm_override_options ()
665 /* Nonzero if PIC code requires explicit qualifiers to generate
666 PLT and GOT relocs rather than the assembler doing so implicitly.
667 Subtargets can override these if required. */
668 #ifndef NEED_GOT_RELOC
669 #define NEED_GOT_RELOC 0
671 #ifndef NEED_PLT_RELOC
672 #define NEED_PLT_RELOC 0
675 /* Nonzero if we need to refer to the GOT with a PC-relative
676 offset. In other words, generate
678 .word _GLOBAL_OFFSET_TABLE_ - [. - (.Lxx + 8)]
682 .word _GLOBAL_OFFSET_TABLE_ - (.Lxx + 8)
684 The default is true, which matches NetBSD. Subtargets can
685 override this if required. */
690 /* Target machine storage Layout. */
693 /* Define this macro if it is advisable to hold scalars in registers
694 in a wider mode than that declared by the program. In such cases,
695 the value is constrained to be within the bounds of the declared
696 type, but kept valid in the wider mode. The signedness of the
697 extension may differ from that of the type. */
699 /* It is far faster to zero extend chars than to sign extend them */
701 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
702 if (GET_MODE_CLASS (MODE) == MODE_INT \
703 && GET_MODE_SIZE (MODE) < 4) \
705 if (MODE == QImode) \
707 else if (MODE == HImode) \
708 UNSIGNEDP = TARGET_MMU_TRAPS != 0; \
712 /* Define this macro if the promotion described by `PROMOTE_MODE'
713 should also be done for outgoing function arguments. */
714 /* This is required to ensure that push insns always push a word. */
715 #define PROMOTE_FUNCTION_ARGS
717 /* Define this if most significant bit is lowest numbered
718 in instructions that operate on numbered bit-fields. */
719 #define BITS_BIG_ENDIAN 0
721 /* Define this if most significant byte of a word is the lowest numbered.
722 Most ARM processors are run in little endian mode, so that is the default.
723 If you want to have it run-time selectable, change the definition in a
724 cover file to be TARGET_BIG_ENDIAN. */
725 #define BYTES_BIG_ENDIAN (TARGET_BIG_END != 0)
727 /* Define this if most significant word of a multiword number is the lowest
729 This is always false, even when in big-endian mode. */
730 #define WORDS_BIG_ENDIAN (BYTES_BIG_ENDIAN && ! TARGET_LITTLE_WORDS)
732 /* LIBGCC2_WORDS_BIG_ENDIAN has to be a constant, so we define this based
733 on processor pre-defineds when compiling libgcc2.c. */
734 #if defined(__ARMEB__) && !defined(__ARMWEL__)
735 #define LIBGCC2_WORDS_BIG_ENDIAN 1
737 #define LIBGCC2_WORDS_BIG_ENDIAN 0
740 /* Define this if most significant word of doubles is the lowest numbered.
741 The rules are different based on whether or not we use FPA-format,
742 VFP-format or some other floating point co-processor's format doubles. */
743 #define FLOAT_WORDS_BIG_ENDIAN (arm_float_words_big_endian ())
745 #define UNITS_PER_WORD 4
747 #define PARM_BOUNDARY 32
749 #define IWMMXT_ALIGNMENT 64
751 #define STACK_BOUNDARY 32
753 #define PREFERRED_STACK_BOUNDARY (TARGET_ATPCS ? 64 : 32)
755 #define FUNCTION_BOUNDARY 32
757 /* The lowest bit is used to indicate Thumb-mode functions, so the
758 vbit must go into the delta field of pointers to member
760 #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_delta
762 #define EMPTY_FIELD_BOUNDARY 32
764 #define BIGGEST_ALIGNMENT (TARGET_REALLY_IWMMXT ? 64 : 32)
766 #define TYPE_NEEDS_IWMMXT_ALIGNMENT(TYPE) \
767 (TARGET_REALLY_IWMMXT \
768 && ((TREE_CODE (TYPE) == VECTOR_TYPE) || (TYPE_MODE (TYPE) == DImode) || (TYPE_MODE (TYPE) == DFmode)))
770 /* XXX Blah -- this macro is used directly by libobjc. Since it
771 supports no vector modes, cut out the complexity and fall back
772 on BIGGEST_FIELD_ALIGNMENT. */
773 #ifdef IN_TARGET_LIBS
774 #define BIGGEST_FIELD_ALIGNMENT 64
776 /* An expression for the alignment of a structure field FIELD if the
777 alignment computed in the usual way is COMPUTED. GCC uses this
778 value instead of the value in `BIGGEST_ALIGNMENT' or
779 `BIGGEST_FIELD_ALIGNMENT', if defined, for structure fields only. */
780 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
781 (TYPE_NEEDS_IWMMXT_ALIGNMENT (TREE_TYPE (FIELD)) \
786 /* If defined, a C expression to compute the alignment for a static variable.
787 TYPE is the data type, and ALIGN is the alignment that the object
788 would ordinarily have. The value of this macro is used instead of that
789 alignment to align the object.
791 If this macro is not defined, then ALIGN is used. */
792 #define DATA_ALIGNMENT(TYPE, ALIGN) \
793 (TYPE_NEEDS_IWMMXT_ALIGNMENT (TYPE) ? IWMMXT_ALIGNMENT : ALIGN)
795 /* If defined, a C expression to compute the alignment for a
796 variables in the local store. TYPE is the data type, and
797 BASIC-ALIGN is the alignment that the object would ordinarily
798 have. The value of this macro is used instead of that alignment
801 If this macro is not defined, then BASIC-ALIGN is used. */
802 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \
803 (TYPE_NEEDS_IWMMXT_ALIGNMENT (TYPE) ? IWMMXT_ALIGNMENT : ALIGN)
805 /* Make strings word-aligned so strcpy from constants will be faster. */
806 #define CONSTANT_ALIGNMENT_FACTOR (TARGET_THUMB || ! arm_tune_xscale ? 1 : 2)
808 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
809 ((TARGET_REALLY_IWMMXT && TREE_CODE (EXP) == VECTOR_TYPE) ? IWMMXT_ALIGNMENT : \
810 (TREE_CODE (EXP) == STRING_CST \
811 && (ALIGN) < BITS_PER_WORD * CONSTANT_ALIGNMENT_FACTOR) \
812 ? BITS_PER_WORD * CONSTANT_ALIGNMENT_FACTOR : (ALIGN))
814 /* Setting STRUCTURE_SIZE_BOUNDARY to 32 produces more efficient code, but the
815 value set in previous versions of this toolchain was 8, which produces more
816 compact structures. The command line option -mstructure_size_boundary=<n>
817 can be used to change this value. For compatibility with the ARM SDK
818 however the value should be left at 32. ARM SDT Reference Manual (ARM DUI
819 0020D) page 2-20 says "Structures are aligned on word boundaries". */
820 #define STRUCTURE_SIZE_BOUNDARY arm_structure_size_boundary
821 extern int arm_structure_size_boundary;
823 /* This is the value used to initialize arm_structure_size_boundary. If a
824 particular arm target wants to change the default value it should change
825 the definition of this macro, not STRUCTURE_SIZE_BOUNDARY. See netbsd.h
826 for an example of this. */
827 #ifndef DEFAULT_STRUCTURE_SIZE_BOUNDARY
828 #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 32
831 /* Used when parsing command line option -mstructure_size_boundary. */
832 extern const char * structure_size_string;
834 /* Nonzero if move instructions will actually fail to work
835 when given unaligned data. */
836 #define STRICT_ALIGNMENT 1
838 /* Standard register usage. */
840 /* Register allocation in ARM Procedure Call Standard (as used on RISCiX):
841 (S - saved over call).
843 r0 * argument word/integer result
846 r4-r8 S register variable
847 r9 S (rfp) register variable (real frame pointer)
849 r10 F S (sl) stack limit (used by -mapcs-stack-check)
850 r11 F S (fp) argument pointer
851 r12 (ip) temp workspace
852 r13 F S (sp) lower end of current stack frame
853 r14 (lr) link address/workspace
854 r15 F (pc) program counter
856 f0 floating point result
857 f1-f3 floating point scratch
859 f4-f7 S floating point variable
861 cc This is NOT a real register, but is used internally
862 to represent things that use or set the condition
864 sfp This isn't either. It is used during rtl generation
865 since the offset between the frame pointer and the
866 auto's isn't known until after register allocation.
867 afp Nor this, we only need this because of non-local
868 goto. Without it fp appears to be used and the
869 elimination code won't get rid of sfp. It tracks
870 fp exactly at all times.
872 *: See CONDITIONAL_REGISTER_USAGE */
875 mvf0 Cirrus floating point result
876 mvf1-mvf3 Cirrus floating point scratch
877 mvf4-mvf15 S Cirrus floating point variable. */
879 /* The stack backtrace structure is as follows:
880 fp points to here: | save code pointer | [fp]
881 | return link value | [fp, #-4]
882 | return sp value | [fp, #-8]
883 | return fp value | [fp, #-12]
884 [| saved r10 value |]
895 [| saved f7 value |] three words
896 [| saved f6 value |] three words
897 [| saved f5 value |] three words
898 [| saved f4 value |] three words
899 r0-r3 are not normally saved in a C function. */
901 /* 1 for registers that have pervasive standard uses
902 and are not available for the register allocator. */
903 #define FIXED_REGISTERS \
916 /* 1 for registers not available across function calls.
917 These must include the FIXED_REGISTERS and also any
918 registers that can be used without being saved.
919 The latter must include the registers where values are returned
920 and the register where structure-value addresses are passed.
921 Aside from that, you can include as many other registers as you like.
922 The CC is not preserved over function calls on the ARM 6, so it is
923 easier to assume this for all. SFP is preserved, since FP is. */
924 #define CALL_USED_REGISTERS \
937 #ifndef SUBTARGET_CONDITIONAL_REGISTER_USAGE
938 #define SUBTARGET_CONDITIONAL_REGISTER_USAGE
941 #define CONDITIONAL_REGISTER_USAGE \
945 if (TARGET_SOFT_FLOAT || TARGET_THUMB) \
947 for (regno = FIRST_ARM_FP_REGNUM; \
948 regno <= LAST_ARM_FP_REGNUM; ++regno) \
949 fixed_regs[regno] = call_used_regs[regno] = 1; \
952 if (TARGET_THUMB && optimize_size) \
954 /* When optimizing for size, it's better not to use \
955 the HI regs, because of the overhead of stacking \
957 for (regno = FIRST_HI_REGNUM; \
958 regno <= LAST_HI_REGNUM; ++regno) \
959 fixed_regs[regno] = call_used_regs[regno] = 1; \
962 /* The link register can be clobbered by any branch insn, \
963 but we have no way to track that at present, so mark \
964 it as unavailable. */ \
966 fixed_regs[LR_REGNUM] = call_used_regs[LR_REGNUM] = 1; \
970 for (regno = FIRST_ARM_FP_REGNUM; \
971 regno <= LAST_ARM_FP_REGNUM; ++ regno) \
972 fixed_regs[regno] = call_used_regs[regno] = 1; \
973 for (regno = FIRST_CIRRUS_FP_REGNUM; \
974 regno <= LAST_CIRRUS_FP_REGNUM; ++ regno) \
976 fixed_regs[regno] = 0; \
977 call_used_regs[regno] = regno < FIRST_CIRRUS_FP_REGNUM + 4; \
981 if (TARGET_REALLY_IWMMXT) \
983 regno = FIRST_IWMMXT_GR_REGNUM; \
984 /* The 2002/10/09 revision of the XScale ABI has wCG0 \
985 and wCG1 as call-preserved registers. The 2002/11/21 \
986 revision changed this so that all wCG registers are \
987 scratch registers. */ \
988 for (regno = FIRST_IWMMXT_GR_REGNUM; \
989 regno <= LAST_IWMMXT_GR_REGNUM; ++ regno) \
990 fixed_regs[regno] = call_used_regs[regno] = 0; \
991 /* The XScale ABI has wR0 - wR9 as scratch registers, \
992 the rest as call-preserved registers. */ \
993 for (regno = FIRST_IWMMXT_REGNUM; \
994 regno <= LAST_IWMMXT_REGNUM; ++ regno) \
996 fixed_regs[regno] = 0; \
997 call_used_regs[regno] = regno < FIRST_IWMMXT_REGNUM + 10; \
1001 if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM) \
1003 fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
1004 call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
1006 else if (TARGET_APCS_STACK) \
1008 fixed_regs[10] = 1; \
1009 call_used_regs[10] = 1; \
1011 if (TARGET_APCS_FRAME) \
1013 fixed_regs[ARM_HARD_FRAME_POINTER_REGNUM] = 1; \
1014 call_used_regs[ARM_HARD_FRAME_POINTER_REGNUM] = 1; \
1016 SUBTARGET_CONDITIONAL_REGISTER_USAGE \
1019 /* These are a couple of extensions to the formats accepted
1021 %@ prints out ASM_COMMENT_START
1022 %r prints out REGISTER_PREFIX reg_names[arg] */
1023 #define ASM_FPRINTF_EXTENSIONS(FILE, ARGS, P) \
1025 fputs (ASM_COMMENT_START, FILE); \
1029 fputs (REGISTER_PREFIX, FILE); \
1030 fputs (reg_names [va_arg (ARGS, int)], FILE); \
1033 /* Round X up to the nearest word. */
1034 #define ROUND_UP_WORD(X) (((X) + 3) & ~3)
1036 /* Convert fron bytes to ints. */
1037 #define ARM_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
1039 /* The number of (integer) registers required to hold a quantity of type MODE. */
1040 #define ARM_NUM_REGS(MODE) \
1041 ARM_NUM_INTS (GET_MODE_SIZE (MODE))
1043 /* The number of (integer) registers required to hold a quantity of TYPE MODE. */
1044 #define ARM_NUM_REGS2(MODE, TYPE) \
1045 ARM_NUM_INTS ((MODE) == BLKmode ? \
1046 int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE))
1048 /* The number of (integer) argument register available. */
1049 #define NUM_ARG_REGS 4
1051 /* Return the register number of the N'th (integer) argument. */
1052 #define ARG_REGISTER(N) (N - 1)
1054 #if 0 /* FIXME: The ARM backend has special code to handle structure
1055 returns, and will reserve its own hidden first argument. So
1056 if this macro is enabled a *second* hidden argument will be
1057 reserved, which will break binary compatibility with old
1058 toolchains and also thunk handling. One day this should be
1060 /* RTX for structure returns. NULL means use a hidden first argument. */
1061 #define STRUCT_VALUE 0
1063 /* Register in which address to store a structure value
1064 is passed to a function. */
1065 #define STRUCT_VALUE_REGNUM ARG_REGISTER (1)
1068 /* Specify the registers used for certain standard purposes.
1069 The values of these macros are register numbers. */
1071 /* The number of the last argument register. */
1072 #define LAST_ARG_REGNUM ARG_REGISTER (NUM_ARG_REGS)
1074 /* The numbers of the Thumb register ranges. */
1075 #define FIRST_LO_REGNUM 0
1076 #define LAST_LO_REGNUM 7
1077 #define FIRST_HI_REGNUM 8
1078 #define LAST_HI_REGNUM 11
1080 /* The register that holds the return address in exception handlers. */
1081 #define EXCEPTION_LR_REGNUM 2
1083 /* The native (Norcroft) Pascal compiler for the ARM passes the static chain
1084 as an invisible last argument (possible since varargs don't exist in
1085 Pascal), so the following is not true. */
1086 #define STATIC_CHAIN_REGNUM (TARGET_ARM ? 12 : 9)
1088 /* Define this to be where the real frame pointer is if it is not possible to
1089 work out the offset between the frame pointer and the automatic variables
1090 until after register allocation has taken place. FRAME_POINTER_REGNUM
1091 should point to a special register that we will make sure is eliminated.
1093 For the Thumb we have another problem. The TPCS defines the frame pointer
1094 as r11, and GCC believes that it is always possible to use the frame pointer
1095 as base register for addressing purposes. (See comments in
1096 find_reloads_address()). But - the Thumb does not allow high registers,
1097 including r11, to be used as base address registers. Hence our problem.
1099 The solution used here, and in the old thumb port is to use r7 instead of
1100 r11 as the hard frame pointer and to have special code to generate
1101 backtrace structures on the stack (if required to do so via a command line
1102 option) using r11. This is the only 'user visible' use of r11 as a frame
1104 #define ARM_HARD_FRAME_POINTER_REGNUM 11
1105 #define THUMB_HARD_FRAME_POINTER_REGNUM 7
1107 #define HARD_FRAME_POINTER_REGNUM \
1109 ? ARM_HARD_FRAME_POINTER_REGNUM \
1110 : THUMB_HARD_FRAME_POINTER_REGNUM)
1112 #define FP_REGNUM HARD_FRAME_POINTER_REGNUM
1114 /* Register to use for pushing function arguments. */
1115 #define STACK_POINTER_REGNUM SP_REGNUM
1117 /* ARM floating pointer registers. */
1118 #define FIRST_ARM_FP_REGNUM 16
1119 #define LAST_ARM_FP_REGNUM 23
1121 #define FIRST_IWMMXT_GR_REGNUM 43
1122 #define LAST_IWMMXT_GR_REGNUM 46
1123 #define FIRST_IWMMXT_REGNUM 47
1124 #define LAST_IWMMXT_REGNUM 62
1125 #define IS_IWMMXT_REGNUM(REGNUM) \
1126 (((REGNUM) >= FIRST_IWMMXT_REGNUM) && ((REGNUM) <= LAST_IWMMXT_REGNUM))
1127 #define IS_IWMMXT_GR_REGNUM(REGNUM) \
1128 (((REGNUM) >= FIRST_IWMMXT_GR_REGNUM) && ((REGNUM) <= LAST_IWMMXT_GR_REGNUM))
1130 /* Base register for access to local variables of the function. */
1131 #define FRAME_POINTER_REGNUM 25
1133 /* Base register for access to arguments of the function. */
1134 #define ARG_POINTER_REGNUM 26
1136 #define FIRST_CIRRUS_FP_REGNUM 27
1137 #define LAST_CIRRUS_FP_REGNUM 42
1138 #define IS_CIRRUS_REGNUM(REGNUM) \
1139 (((REGNUM) >= FIRST_CIRRUS_FP_REGNUM) && ((REGNUM) <= LAST_CIRRUS_FP_REGNUM))
1141 /* The number of hard registers is 16 ARM + 8 FPA + 1 CC + 1 SFP + 1 AFP. */
1142 /* + 16 Cirrus registers take us up to 43. */
1143 /* Intel Wireless MMX Technology registers add 16 + 4 more. */
1144 #define FIRST_PSEUDO_REGISTER 63
1146 /* Value should be nonzero if functions must have frame pointers.
1147 Zero means the frame pointer need not be set up (and parms may be accessed
1148 via the stack pointer) in functions that seem suitable.
1149 If we have to have a frame pointer we might as well make use of it.
1150 APCS says that the frame pointer does not need to be pushed in leaf
1151 functions, or simple tail call functions. */
1152 #define FRAME_POINTER_REQUIRED \
1153 (current_function_has_nonlocal_label \
1154 || (TARGET_ARM && TARGET_APCS_FRAME && ! leaf_function_p ()))
1156 /* Return number of consecutive hard regs needed starting at reg REGNO
1157 to hold something of mode MODE.
1158 This is ordinarily the length in words of a value of mode MODE
1159 but can be less for certain modes in special long registers.
1161 On the ARM regs are UNITS_PER_WORD bits wide; FPA regs can hold any FP
1163 #define HARD_REGNO_NREGS(REGNO, MODE) \
1165 && REGNO >= FIRST_ARM_FP_REGNUM \
1166 && REGNO != FRAME_POINTER_REGNUM \
1167 && REGNO != ARG_POINTER_REGNUM) \
1168 ? 1 : ARM_NUM_REGS (MODE))
1170 /* Return true if REGNO is suitable for holding a quantity of type MODE. */
1171 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
1172 arm_hard_regno_mode_ok ((REGNO), (MODE))
1174 /* Value is 1 if it is a good idea to tie two pseudo registers
1175 when one has mode MODE1 and one has mode MODE2.
1176 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
1177 for any hard reg, then this must be 0 for correct output. */
1178 #define MODES_TIEABLE_P(MODE1, MODE2) \
1179 (GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2))
1181 #define VECTOR_MODE_SUPPORTED_P(MODE) \
1182 ((MODE) == V2SImode || (MODE) == V4HImode || (MODE) == V8QImode)
1184 #define VALID_IWMMXT_REG_MODE(MODE) \
1185 (VECTOR_MODE_SUPPORTED_P (MODE) || (MODE) == DImode)
1187 /* The order in which register should be allocated. It is good to use ip
1188 since no saving is required (though calls clobber it) and it never contains
1189 function parameters. It is quite good to use lr since other calls may
1190 clobber it anyway. Allocate r0 through r3 in reverse order since r3 is
1191 least likely to contain a function parameter; in addition results are
1193 #define REG_ALLOC_ORDER \
1195 3, 2, 1, 0, 12, 14, 4, 5, \
1196 6, 7, 8, 10, 9, 11, 13, 15, \
1197 16, 17, 18, 19, 20, 21, 22, 23, \
1198 27, 28, 29, 30, 31, 32, 33, 34, \
1199 35, 36, 37, 38, 39, 40, 41, 42, \
1200 43, 44, 45, 46, 47, 48, 49, 50, \
1201 51, 52, 53, 54, 55, 56, 57, 58, \
1206 /* Interrupt functions can only use registers that have already been
1207 saved by the prologue, even if they would normally be
1209 #define HARD_REGNO_RENAME_OK(SRC, DST) \
1210 (! IS_INTERRUPT (cfun->machine->func_type) || \
1211 regs_ever_live[DST])
1213 /* Register and constant classes. */
1215 /* Register classes: used to be simple, just all ARM regs or all FPA regs
1216 Now that the Thumb is involved it has become more complicated. */
1234 #define N_REG_CLASSES (int) LIM_REG_CLASSES
1236 /* Give names of register classes as strings for dump file. */
1237 #define REG_CLASS_NAMES \
1253 /* Define which registers fit in which classes.
1254 This is an initializer for a vector of HARD_REG_SET
1255 of length N_REG_CLASSES. */
1256 #define REG_CLASS_CONTENTS \
1258 { 0x00000000, 0x0 }, /* NO_REGS */ \
1259 { 0x00FF0000, 0x0 }, /* FPA_REGS */ \
1260 { 0xF8000000, 0x000007FF }, /* CIRRUS_REGS */ \
1261 { 0x00000000, 0x00007800 }, /* IWMMXT_GR_REGS */\
1262 { 0x00000000, 0x7FFF8000 }, /* IWMMXT_REGS */ \
1263 { 0x000000FF, 0x0 }, /* LO_REGS */ \
1264 { 0x00002000, 0x0 }, /* STACK_REG */ \
1265 { 0x000020FF, 0x0 }, /* BASE_REGS */ \
1266 { 0x0000FF00, 0x0 }, /* HI_REGS */ \
1267 { 0x01000000, 0x0 }, /* CC_REG */ \
1268 { 0x0200FFFF, 0x0 }, /* GENERAL_REGS */\
1269 { 0xFAFFFFFF, 0x7FFFFFFF } /* ALL_REGS */ \
1272 /* The same information, inverted:
1273 Return the class number of the smallest class containing
1274 reg number REGNO. This could be a conditional expression
1275 or could index an array. */
1276 #define REGNO_REG_CLASS(REGNO) arm_regno_class (REGNO)
1278 /* FPA registers can't do dubreg as all values are reformatted to internal
1280 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
1281 (GET_MODE_SIZE (FROM) != GET_MODE_SIZE (TO) \
1282 ? reg_classes_intersect_p (FPA_REGS, (CLASS)) : 0)
1284 /* The class value for index registers, and the one for base regs. */
1285 #define INDEX_REG_CLASS (TARGET_THUMB ? LO_REGS : GENERAL_REGS)
1286 #define BASE_REG_CLASS (TARGET_THUMB ? LO_REGS : GENERAL_REGS)
1288 /* For the Thumb the high registers cannot be used as base registers
1289 when addressing quantities in QI or HI mode; if we don't know the
1290 mode, then we must be conservative. After reload we must also be
1291 conservative, since we can't support SP+reg addressing, and we
1292 can't fix up any bad substitutions. */
1293 #define MODE_BASE_REG_CLASS(MODE) \
1294 (TARGET_ARM ? GENERAL_REGS : \
1295 (((MODE) == SImode && !reload_completed) ? BASE_REGS : LO_REGS))
1297 /* When SMALL_REGISTER_CLASSES is nonzero, the compiler allows
1298 registers explicitly used in the rtl to be used as spill registers
1299 but prevents the compiler from extending the lifetime of these
1301 #define SMALL_REGISTER_CLASSES TARGET_THUMB
1303 /* Get reg_class from a letter such as appears in the machine description.
1304 We only need constraint `f' for FPA_REGS (`r' == GENERAL_REGS) for the
1305 ARM, but several more letters for the Thumb. */
1306 #define REG_CLASS_FROM_LETTER(C) \
1307 ( (C) == 'f' ? FPA_REGS \
1308 : (C) == 'v' ? CIRRUS_REGS \
1309 : (C) == 'y' ? IWMMXT_REGS \
1310 : (C) == 'z' ? IWMMXT_GR_REGS \
1311 : (C) == 'l' ? (TARGET_ARM ? GENERAL_REGS : LO_REGS) \
1312 : TARGET_ARM ? NO_REGS \
1313 : (C) == 'h' ? HI_REGS \
1314 : (C) == 'b' ? BASE_REGS \
1315 : (C) == 'k' ? STACK_REG \
1316 : (C) == 'c' ? CC_REG \
1319 /* The letters I, J, K, L and M in a register constraint string
1320 can be used to stand for particular ranges of immediate operands.
1321 This macro defines what the ranges are.
1322 C is the letter, and VALUE is a constant value.
1323 Return 1 if VALUE is in the range specified by C.
1324 I: immediate arithmetic operand (i.e. 8 bits shifted as required).
1325 J: valid indexing constants.
1326 K: ~value ok in rhs argument of data operand.
1327 L: -value ok in rhs argument of data operand.
1328 M: 0..32, or a power of 2 (for shifts, or mult done by shift). */
1329 #define CONST_OK_FOR_ARM_LETTER(VALUE, C) \
1330 ((C) == 'I' ? const_ok_for_arm (VALUE) : \
1331 (C) == 'J' ? ((VALUE) < 4096 && (VALUE) > -4096) : \
1332 (C) == 'K' ? (const_ok_for_arm (~(VALUE))) : \
1333 (C) == 'L' ? (const_ok_for_arm (-(VALUE))) : \
1334 (C) == 'M' ? (((VALUE >= 0 && VALUE <= 32)) \
1335 || (((VALUE) & ((VALUE) - 1)) == 0)) \
1338 #define CONST_OK_FOR_THUMB_LETTER(VAL, C) \
1339 ((C) == 'I' ? (unsigned HOST_WIDE_INT) (VAL) < 256 : \
1340 (C) == 'J' ? (VAL) > -256 && (VAL) < 0 : \
1341 (C) == 'K' ? thumb_shiftable_const (VAL) : \
1342 (C) == 'L' ? (VAL) > -8 && (VAL) < 8 : \
1343 (C) == 'M' ? ((unsigned HOST_WIDE_INT) (VAL) < 1024 \
1344 && ((VAL) & 3) == 0) : \
1345 (C) == 'N' ? ((unsigned HOST_WIDE_INT) (VAL) < 32) : \
1346 (C) == 'O' ? ((VAL) >= -508 && (VAL) <= 508) \
1349 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1351 CONST_OK_FOR_ARM_LETTER (VALUE, C) : CONST_OK_FOR_THUMB_LETTER (VALUE, C))
1353 /* Constant letter 'G' for the FPA immediate constants.
1354 'H' means the same constant negated. */
1355 #define CONST_DOUBLE_OK_FOR_ARM_LETTER(X, C) \
1356 ((C) == 'G' ? const_double_rtx_ok_for_fpa (X) : \
1357 (C) == 'H' ? neg_const_double_rtx_ok_for_fpa (X) : 0)
1359 #define CONST_DOUBLE_OK_FOR_LETTER_P(X, C) \
1361 CONST_DOUBLE_OK_FOR_ARM_LETTER (X, C) : 0)
1363 /* For the ARM, `Q' means that this is a memory operand that is just
1364 an offset from a register.
1365 `S' means any symbol that has the SYMBOL_REF_FLAG set or a CONSTANT_POOL
1366 address. This means that the symbol is in the text segment and can be
1367 accessed without using a load. */
1369 #define EXTRA_CONSTRAINT_ARM(OP, C) \
1370 ((C) == 'Q' ? GET_CODE (OP) == MEM && GET_CODE (XEXP (OP, 0)) == REG : \
1371 (C) == 'R' ? (GET_CODE (OP) == MEM \
1372 && GET_CODE (XEXP (OP, 0)) == SYMBOL_REF \
1373 && CONSTANT_POOL_ADDRESS_P (XEXP (OP, 0))) : \
1374 (C) == 'S' ? (optimize > 0 && CONSTANT_ADDRESS_P (OP)) : \
1375 (C) == 'T' ? cirrus_memory_offset (OP) : \
1378 #define EXTRA_CONSTRAINT_THUMB(X, C) \
1379 ((C) == 'Q' ? (GET_CODE (X) == MEM \
1380 && GET_CODE (XEXP (X, 0)) == LABEL_REF) : 0)
1382 #define EXTRA_CONSTRAINT(X, C) \
1384 EXTRA_CONSTRAINT_ARM (X, C) : EXTRA_CONSTRAINT_THUMB (X, C))
1386 /* Given an rtx X being reloaded into a reg required to be
1387 in class CLASS, return the class of reg to actually use.
1388 In general this is just CLASS, but for the Thumb we prefer
1389 a LO_REGS class or a subset. */
1390 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
1391 (TARGET_ARM ? (CLASS) : \
1392 ((CLASS) == BASE_REGS ? (CLASS) : LO_REGS))
1394 /* Must leave BASE_REGS reloads alone */
1395 #define THUMB_SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1396 ((CLASS) != LO_REGS && (CLASS) != BASE_REGS \
1397 ? ((true_regnum (X) == -1 ? LO_REGS \
1398 : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS \
1402 #define THUMB_SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1403 ((CLASS) != LO_REGS \
1404 ? ((true_regnum (X) == -1 ? LO_REGS \
1405 : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS \
1409 /* Return the register class of a scratch register needed to copy IN into
1410 or out of a register in CLASS in MODE. If it can be done directly,
1411 NO_REGS is returned. */
1412 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1414 (((MODE) == HImode && ! arm_arch4 && true_regnum (X) == -1) \
1415 ? GENERAL_REGS : NO_REGS) \
1416 : THUMB_SECONDARY_OUTPUT_RELOAD_CLASS (CLASS, MODE, X))
1418 /* If we need to load shorts byte-at-a-time, then we need a scratch. */
1419 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1420 /* Cannot load constants into Cirrus registers. */ \
1422 && (CLASS) == CIRRUS_REGS \
1423 && (CONSTANT_P (X) || GET_CODE (X) == SYMBOL_REF)) \
1426 (((CLASS) == IWMMXT_REGS || (CLASS) == IWMMXT_GR_REGS) \
1427 && CONSTANT_P (X)) \
1429 (((MODE) == HImode && ! arm_arch4 && TARGET_MMU_TRAPS \
1430 && (GET_CODE (X) == MEM \
1431 || ((GET_CODE (X) == REG || GET_CODE (X) == SUBREG) \
1432 && true_regnum (X) == -1))) \
1433 ? GENERAL_REGS : NO_REGS) \
1434 : THUMB_SECONDARY_INPUT_RELOAD_CLASS (CLASS, MODE, X)))
1436 /* Try a machine-dependent way of reloading an illegitimate address
1437 operand. If we find one, push the reload and jump to WIN. This
1438 macro is used in only one place: `find_reloads_address' in reload.c.
1440 For the ARM, we wish to handle large displacements off a base
1441 register by splitting the addend across a MOV and the mem insn.
1442 This can cut the number of reloads needed. */
1443 #define ARM_LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND, WIN) \
1446 if (GET_CODE (X) == PLUS \
1447 && GET_CODE (XEXP (X, 0)) == REG \
1448 && REGNO (XEXP (X, 0)) < FIRST_PSEUDO_REGISTER \
1449 && REG_MODE_OK_FOR_BASE_P (XEXP (X, 0), MODE) \
1450 && GET_CODE (XEXP (X, 1)) == CONST_INT) \
1452 HOST_WIDE_INT val = INTVAL (XEXP (X, 1)); \
1453 HOST_WIDE_INT low, high; \
1455 if (MODE == DImode || (TARGET_SOFT_FLOAT && MODE == DFmode)) \
1456 low = ((val & 0xf) ^ 0x8) - 0x8; \
1457 else if (TARGET_CIRRUS) \
1458 /* Need to be careful, -256 is not a valid offset. */ \
1459 low = val >= 0 ? (val & 0xff) : -((-val) & 0xff); \
1460 else if (MODE == SImode \
1461 || (MODE == SFmode && TARGET_SOFT_FLOAT) \
1462 || ((MODE == HImode || MODE == QImode) && ! arm_arch4)) \
1463 /* Need to be careful, -4096 is not a valid offset. */ \
1464 low = val >= 0 ? (val & 0xfff) : -((-val) & 0xfff); \
1465 else if ((MODE == HImode || MODE == QImode) && arm_arch4) \
1466 /* Need to be careful, -256 is not a valid offset. */ \
1467 low = val >= 0 ? (val & 0xff) : -((-val) & 0xff); \
1468 else if (GET_MODE_CLASS (MODE) == MODE_FLOAT \
1469 && TARGET_HARD_FLOAT) \
1470 /* Need to be careful, -1024 is not a valid offset. */ \
1471 low = val >= 0 ? (val & 0x3ff) : -((-val) & 0x3ff); \
1475 high = ((((val - low) & (unsigned HOST_WIDE_INT) 0xffffffff) \
1476 ^ (unsigned HOST_WIDE_INT) 0x80000000) \
1477 - (unsigned HOST_WIDE_INT) 0x80000000); \
1478 /* Check for overflow or zero */ \
1479 if (low == 0 || high == 0 || (high + low != val)) \
1482 /* Reload the high part into a base reg; leave the low part \
1484 X = gen_rtx_PLUS (GET_MODE (X), \
1485 gen_rtx_PLUS (GET_MODE (X), XEXP (X, 0), \
1488 push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \
1489 MODE_BASE_REG_CLASS (MODE), GET_MODE (X), \
1490 VOIDmode, 0, 0, OPNUM, TYPE); \
1496 /* XXX If an HImode FP+large_offset address is converted to an HImode
1497 SP+large_offset address, then reload won't know how to fix it. It sees
1498 only that SP isn't valid for HImode, and so reloads the SP into an index
1499 register, but the resulting address is still invalid because the offset
1500 is too big. We fix it here instead by reloading the entire address. */
1501 /* We could probably achieve better results by defining PROMOTE_MODE to help
1502 cope with the variances between the Thumb's signed and unsigned byte and
1503 halfword load instructions. */
1504 #define THUMB_LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1506 if (GET_CODE (X) == PLUS \
1507 && GET_MODE_SIZE (MODE) < 4 \
1508 && GET_CODE (XEXP (X, 0)) == REG \
1509 && XEXP (X, 0) == stack_pointer_rtx \
1510 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1511 && ! thumb_legitimate_offset_p (MODE, INTVAL (XEXP (X, 1)))) \
1515 push_reload (orig_X, NULL_RTX, &X, NULL, \
1516 MODE_BASE_REG_CLASS (MODE), \
1517 Pmode, VOIDmode, 0, 0, OPNUM, TYPE); \
1522 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1524 ARM_LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN); \
1526 THUMB_LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)
1528 /* Return the maximum number of consecutive registers
1529 needed to represent mode MODE in a register of class CLASS.
1530 ARM regs are UNITS_PER_WORD bits while FPA regs can hold any FP mode */
1531 #define CLASS_MAX_NREGS(CLASS, MODE) \
1532 (((CLASS) == FPA_REGS || (CLASS) == CIRRUS_REGS) ? 1 : ARM_NUM_REGS (MODE))
1534 /* If defined, gives a class of registers that cannot be used as the
1535 operand of a SUBREG that changes the mode of the object illegally. */
1537 /* Moves between FPA_REGS and GENERAL_REGS are two memory insns. */
1538 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
1540 ((FROM) == FPA_REGS && (TO) != FPA_REGS ? 20 : \
1541 (FROM) != FPA_REGS && (TO) == FPA_REGS ? 20 : \
1542 (FROM) == IWMMXT_REGS && (TO) != IWMMXT_REGS ? 4 : \
1543 (FROM) != IWMMXT_REGS && (TO) == IWMMXT_REGS ? 4 : \
1544 (FROM) == IWMMXT_GR_REGS || (TO) == IWMMXT_GR_REGS ? 20 : \
1545 (FROM) == CIRRUS_REGS && (TO) != CIRRUS_REGS ? 20 : \
1546 (FROM) != CIRRUS_REGS && (TO) == CIRRUS_REGS ? 20 : \
1549 ((FROM) == HI_REGS || (TO) == HI_REGS) ? 4 : 2)
1551 /* Stack layout; function entry, exit and calling. */
1553 /* Define this if pushing a word on the stack
1554 makes the stack pointer a smaller address. */
1555 #define STACK_GROWS_DOWNWARD 1
1557 /* Define this if the nominal address of the stack frame
1558 is at the high-address end of the local variables;
1559 that is, each additional local variable allocated
1560 goes at a more negative offset in the frame. */
1561 #define FRAME_GROWS_DOWNWARD 1
1563 /* Offset within stack frame to start allocating local variables at.
1564 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
1565 first local allocated. Otherwise, it is the offset to the BEGINNING
1566 of the first local allocated. */
1567 #define STARTING_FRAME_OFFSET 0
1569 /* If we generate an insn to push BYTES bytes,
1570 this says how many the stack pointer really advances by. */
1571 /* The push insns do not do this rounding implicitly.
1572 So don't define this. */
1573 /* #define PUSH_ROUNDING(NPUSHED) ROUND_UP_WORD (NPUSHED) */
1575 /* Define this if the maximum size of all the outgoing args is to be
1576 accumulated and pushed during the prologue. The amount can be
1577 found in the variable current_function_outgoing_args_size. */
1578 #define ACCUMULATE_OUTGOING_ARGS 1
1580 /* Offset of first parameter from the argument pointer register value. */
1581 #define FIRST_PARM_OFFSET(FNDECL) (TARGET_ARM ? 4 : 0)
1583 /* Value is the number of byte of arguments automatically
1584 popped when returning from a subroutine call.
1585 FUNDECL is the declaration node of the function (as a tree),
1586 FUNTYPE is the data type of the function (as a tree),
1587 or for a library call it is an identifier node for the subroutine name.
1588 SIZE is the number of bytes of arguments passed on the stack.
1590 On the ARM, the caller does not pop any of its arguments that were passed
1592 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, SIZE) 0
1594 /* Define how to find the value returned by a library function
1595 assuming the value has mode MODE. */
1596 #define LIBCALL_VALUE(MODE) \
1597 (TARGET_ARM && TARGET_HARD_FLOAT && GET_MODE_CLASS (MODE) == MODE_FLOAT \
1598 ? gen_rtx_REG (MODE, FIRST_ARM_FP_REGNUM) \
1599 : TARGET_ARM && TARGET_CIRRUS && GET_MODE_CLASS (MODE) == MODE_FLOAT \
1600 ? gen_rtx_REG (MODE, FIRST_CIRRUS_FP_REGNUM) \
1601 : TARGET_REALLY_IWMMXT && VECTOR_MODE_SUPPORTED_P (MODE) \
1602 ? gen_rtx_REG (MODE, FIRST_IWMMXT_REGNUM) \
1603 : gen_rtx_REG (MODE, ARG_REGISTER (1)))
1605 /* Define how to find the value returned by a function.
1606 VALTYPE is the data type of the value (as a tree).
1607 If the precise function being called is known, FUNC is its FUNCTION_DECL;
1608 otherwise, FUNC is 0. */
1609 #define FUNCTION_VALUE(VALTYPE, FUNC) \
1610 LIBCALL_VALUE (TYPE_MODE (VALTYPE))
1612 /* 1 if N is a possible register number for a function value.
1613 On the ARM, only r0 and f0 can return results. */
1614 /* On a Cirrus chip, mvf0 can return results. */
1615 #define FUNCTION_VALUE_REGNO_P(REGNO) \
1616 ((REGNO) == ARG_REGISTER (1) \
1617 || (TARGET_ARM && ((REGNO) == FIRST_CIRRUS_FP_REGNUM) && TARGET_CIRRUS) \
1618 || (TARGET_ARM && ((REGNO) == FIRST_IWMMXT_REGNUM) && TARGET_IWMMXT) \
1619 || (TARGET_ARM && ((REGNO) == FIRST_ARM_FP_REGNUM) && TARGET_HARD_FLOAT))
1621 /* How large values are returned */
1622 /* A C expression which can inhibit the returning of certain function values
1623 in registers, based on the type of value. */
1624 #define RETURN_IN_MEMORY(TYPE) arm_return_in_memory (TYPE)
1626 /* Define DEFAULT_PCC_STRUCT_RETURN to 1 if all structure and union return
1627 values must be in memory. On the ARM, they need only do so if larger
1628 than a word, or if they contain elements offset from zero in the struct. */
1629 #define DEFAULT_PCC_STRUCT_RETURN 0
1631 /* Flags for the call/call_value rtl operations set up by function_arg. */
1632 #define CALL_NORMAL 0x00000000 /* No special processing. */
1633 #define CALL_LONG 0x00000001 /* Always call indirect. */
1634 #define CALL_SHORT 0x00000002 /* Never call indirect. */
1636 /* These bits describe the different types of function supported
1637 by the ARM backend. They are exclusive. ie a function cannot be both a
1638 normal function and an interworked function, for example. Knowing the
1639 type of a function is important for determining its prologue and
1641 Note value 7 is currently unassigned. Also note that the interrupt
1642 function types all have bit 2 set, so that they can be tested for easily.
1643 Note that 0 is deliberately chosen for ARM_FT_UNKNOWN so that when the
1644 machine_function structure is initialized (to zero) func_type will
1645 default to unknown. This will force the first use of arm_current_func_type
1646 to call arm_compute_func_type. */
1647 #define ARM_FT_UNKNOWN 0 /* Type has not yet been determined. */
1648 #define ARM_FT_NORMAL 1 /* Your normal, straightforward function. */
1649 #define ARM_FT_INTERWORKED 2 /* A function that supports interworking. */
1650 #define ARM_FT_EXCEPTION_HANDLER 3 /* A C++ exception handler. */
1651 #define ARM_FT_ISR 4 /* An interrupt service routine. */
1652 #define ARM_FT_FIQ 5 /* A fast interrupt service routine. */
1653 #define ARM_FT_EXCEPTION 6 /* An ARM exception handler (subcase of ISR). */
1655 #define ARM_FT_TYPE_MASK ((1 << 3) - 1)
1657 /* In addition functions can have several type modifiers,
1658 outlined by these bit masks: */
1659 #define ARM_FT_INTERRUPT (1 << 2) /* Note overlap with FT_ISR and above. */
1660 #define ARM_FT_NAKED (1 << 3) /* No prologue or epilogue. */
1661 #define ARM_FT_VOLATILE (1 << 4) /* Does not return. */
1662 #define ARM_FT_NESTED (1 << 5) /* Embedded inside another func. */
1664 /* Some macros to test these flags. */
1665 #define ARM_FUNC_TYPE(t) (t & ARM_FT_TYPE_MASK)
1666 #define IS_INTERRUPT(t) (t & ARM_FT_INTERRUPT)
1667 #define IS_VOLATILE(t) (t & ARM_FT_VOLATILE)
1668 #define IS_NAKED(t) (t & ARM_FT_NAKED)
1669 #define IS_NESTED(t) (t & ARM_FT_NESTED)
1671 /* A C structure for machine-specific, per-function data.
1672 This is added to the cfun structure. */
1673 typedef struct machine_function GTY(())
1675 /* Additional stack adjustment in __builtin_eh_throw. */
1676 rtx eh_epilogue_sp_ofs;
1677 /* Records if LR has to be saved for far jumps. */
1679 /* Records if ARG_POINTER was ever live. */
1680 int arg_pointer_live;
1681 /* Records if the save of LR has been eliminated. */
1682 int lr_save_eliminated;
1683 /* The size of the stack frame. Only valid after reload. */
1685 /* Records the type of the current function. */
1686 unsigned long func_type;
1687 /* Record if the function has a variable argument list. */
1688 int uses_anonymous_args;
1689 /* Records if sibcalls are blocked because an argument
1690 register is needed to preserve stack alignment. */
1691 int sibcall_blocked;
1695 /* A C type for declaring a variable that is used as the first argument of
1696 `FUNCTION_ARG' and other related values. For some target machines, the
1697 type `int' suffices and can hold the number of bytes of argument so far. */
1700 /* This is the number of registers of arguments scanned so far. */
1702 /* This is the number of iWMMXt register arguments scanned so far. */
1706 /* One of CALL_NORMAL, CALL_LONG or CALL_SHORT . */
1710 /* Define where to put the arguments to a function.
1711 Value is zero to push the argument on the stack,
1712 or a hard register in which to store the argument.
1714 MODE is the argument's machine mode.
1715 TYPE is the data type of the argument (as a tree).
1716 This is null for libcalls where that information may
1718 CUM is a variable of type CUMULATIVE_ARGS which gives info about
1719 the preceding args and about the function being called.
1720 NAMED is nonzero if this argument is a named parameter
1721 (otherwise it is an extra parameter matching an ellipsis).
1723 On the ARM, normally the first 16 bytes are passed in registers r0-r3; all
1724 other arguments are passed on the stack. If (NAMED == 0) (which happens
1725 only in assign_parms, since SETUP_INCOMING_VARARGS is defined), say it is
1726 passed in the stack (function_prologue will indeed make it pass in the
1727 stack if necessary). */
1728 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1729 arm_function_arg (&(CUM), (MODE), (TYPE), (NAMED))
1731 /* For an arg passed partly in registers and partly in memory,
1732 this is the number of registers used.
1733 For args passed entirely in registers or entirely in memory, zero. */
1734 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
1735 (VECTOR_MODE_SUPPORTED_P (MODE) ? 0 : \
1736 NUM_ARG_REGS > (CUM).nregs \
1737 && (NUM_ARG_REGS < ((CUM).nregs + ARM_NUM_REGS2 (MODE, TYPE))) \
1738 ? NUM_ARG_REGS - (CUM).nregs : 0)
1740 /* A C expression that indicates when an argument must be passed by
1741 reference. If nonzero for an argument, a copy of that argument is
1742 made in memory and a pointer to the argument is passed instead of
1743 the argument itself. The pointer is passed in whatever way is
1744 appropriate for passing a pointer to that type. */
1745 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
1746 arm_function_arg_pass_by_reference (&CUM, MODE, TYPE, NAMED)
1748 /* Initialize a variable CUM of type CUMULATIVE_ARGS
1749 for a call to a function whose data type is FNTYPE.
1750 For a library call, FNTYPE is 0.
1751 On the ARM, the offset starts at 0. */
1752 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL) \
1753 arm_init_cumulative_args (&(CUM), (FNTYPE), (LIBNAME), (FNDECL))
1755 /* Update the data in CUM to advance over an argument
1756 of mode MODE and data type TYPE.
1757 (TYPE is null for libcalls where that information may not be available.) */
1758 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1760 if (VECTOR_MODE_SUPPORTED_P (MODE)) \
1761 if ((CUM).named_count <= (CUM).nargs) \
1764 (CUM).iwmmxt_nregs += 1; \
1766 (CUM).nregs += ARM_NUM_REGS2 (MODE, TYPE)
1768 /* If defined, a C expression that gives the alignment boundary, in bits, of an
1769 argument with the specified mode and type. If it is not defined,
1770 `PARM_BOUNDARY' is used for all arguments. */
1771 #define FUNCTION_ARG_BOUNDARY(MODE,TYPE) \
1772 (TARGET_REALLY_IWMMXT && (VALID_IWMMXT_REG_MODE (MODE) || ((MODE) == DFmode)) \
1773 ? IWMMXT_ALIGNMENT : PARM_BOUNDARY)
1775 /* 1 if N is a possible register number for function argument passing.
1776 On the ARM, r0-r3 are used to pass args. */
1777 #define FUNCTION_ARG_REGNO_P(REGNO) \
1778 (IN_RANGE ((REGNO), 0, 3) \
1779 || (TARGET_REALLY_IWMMXT && IN_RANGE ((REGNO), FIRST_IWMMXT_REGNUM, FIRST_IWMMXT_REGNUM + 9)))
1781 /* Implement `va_arg'. */
1782 #define EXPAND_BUILTIN_VA_ARG(valist, type) \
1783 arm_va_arg (valist, type)
1786 /* Perform any actions needed for a function that is receiving a variable
1787 number of arguments. CUM is as above. MODE and TYPE are the mode and type
1788 of the current parameter. PRETEND_SIZE is a variable that should be set to
1789 the amount of stack that must be pushed by the prolog to pretend that our
1792 Normally, this macro will push all remaining incoming registers on the
1793 stack and set PRETEND_SIZE to the length of the registers pushed.
1795 On the ARM, PRETEND_SIZE is set in order to have the prologue push the last
1796 named arg and all anonymous args onto the stack.
1797 XXX I know the prologue shouldn't be pushing registers, but it is faster
1799 #define SETUP_INCOMING_VARARGS(CUM, MODE, TYPE, PRETEND_SIZE, NO_RTL) \
1801 cfun->machine->uses_anonymous_args = 1; \
1802 if ((CUM).nregs < NUM_ARG_REGS) \
1803 (PRETEND_SIZE) = (NUM_ARG_REGS - (CUM).nregs) * UNITS_PER_WORD; \
1806 /* If your target environment doesn't prefix user functions with an
1807 underscore, you may wish to re-define this to prevent any conflicts.
1808 e.g. AOF may prefix mcount with an underscore. */
1809 #ifndef ARM_MCOUNT_NAME
1810 #define ARM_MCOUNT_NAME "*mcount"
1813 /* Call the function profiler with a given profile label. The Acorn
1814 compiler puts this BEFORE the prolog but gcc puts it afterwards.
1815 On the ARM the full profile code will look like:
1824 profile_function() in final.c outputs the .data section, FUNCTION_PROFILER
1825 will output the .text section.
1827 The ``mov ip,lr'' seems like a good idea to stick with cc convention.
1828 ``prof'' doesn't seem to mind about this!
1830 Note - this version of the code is designed to work in both ARM and
1832 #ifndef ARM_FUNCTION_PROFILER
1833 #define ARM_FUNCTION_PROFILER(STREAM, LABELNO) \
1838 asm_fprintf (STREAM, "\tmov\t%r, %r\n\tbl\t", \
1839 IP_REGNUM, LR_REGNUM); \
1840 assemble_name (STREAM, ARM_MCOUNT_NAME); \
1841 fputc ('\n', STREAM); \
1842 ASM_GENERATE_INTERNAL_LABEL (temp, "LP", LABELNO); \
1843 sym = gen_rtx (SYMBOL_REF, Pmode, temp); \
1844 assemble_aligned_integer (UNITS_PER_WORD, sym); \
1848 #ifdef THUMB_FUNCTION_PROFILER
1849 #define FUNCTION_PROFILER(STREAM, LABELNO) \
1851 ARM_FUNCTION_PROFILER (STREAM, LABELNO) \
1853 THUMB_FUNCTION_PROFILER (STREAM, LABELNO)
1855 #define FUNCTION_PROFILER(STREAM, LABELNO) \
1856 ARM_FUNCTION_PROFILER (STREAM, LABELNO)
1859 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1860 the stack pointer does not matter. The value is tested only in
1861 functions that have frame pointers.
1862 No definition is equivalent to always zero.
1864 On the ARM, the function epilogue recovers the stack pointer from the
1866 #define EXIT_IGNORE_STACK 1
1868 #define EPILOGUE_USES(REGNO) (reload_completed && (REGNO) == LR_REGNUM)
1870 /* Determine if the epilogue should be output as RTL.
1871 You should override this if you define FUNCTION_EXTRA_EPILOGUE. */
1872 #define USE_RETURN_INSN(ISCOND) \
1873 (TARGET_ARM ? use_return_insn (ISCOND, NULL) : 0)
1875 /* Definitions for register eliminations.
1877 This is an array of structures. Each structure initializes one pair
1878 of eliminable registers. The "from" register number is given first,
1879 followed by "to". Eliminations of the same "from" register are listed
1880 in order of preference.
1882 We have two registers that can be eliminated on the ARM. First, the
1883 arg pointer register can often be eliminated in favor of the stack
1884 pointer register. Secondly, the pseudo frame pointer register can always
1885 be eliminated; it is replaced with either the stack or the real frame
1886 pointer. Note we have to use {ARM|THUMB}_HARD_FRAME_POINTER_REGNUM
1887 because the definition of HARD_FRAME_POINTER_REGNUM is not a constant. */
1889 #define ELIMINABLE_REGS \
1890 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM },\
1891 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM },\
1892 { ARG_POINTER_REGNUM, ARM_HARD_FRAME_POINTER_REGNUM },\
1893 { ARG_POINTER_REGNUM, THUMB_HARD_FRAME_POINTER_REGNUM },\
1894 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM },\
1895 { FRAME_POINTER_REGNUM, ARM_HARD_FRAME_POINTER_REGNUM },\
1896 { FRAME_POINTER_REGNUM, THUMB_HARD_FRAME_POINTER_REGNUM }}
1898 /* Given FROM and TO register numbers, say whether this elimination is
1899 allowed. Frame pointer elimination is automatically handled.
1901 All eliminations are permissible. Note that ARG_POINTER_REGNUM and
1902 HARD_FRAME_POINTER_REGNUM are in fact the same thing. If we need a frame
1903 pointer, we must eliminate FRAME_POINTER_REGNUM into
1904 HARD_FRAME_POINTER_REGNUM and not into STACK_POINTER_REGNUM or
1905 ARG_POINTER_REGNUM. */
1906 #define CAN_ELIMINATE(FROM, TO) \
1907 (((TO) == FRAME_POINTER_REGNUM && (FROM) == ARG_POINTER_REGNUM) ? 0 : \
1908 ((TO) == STACK_POINTER_REGNUM && frame_pointer_needed) ? 0 : \
1909 ((TO) == ARM_HARD_FRAME_POINTER_REGNUM && TARGET_THUMB) ? 0 : \
1910 ((TO) == THUMB_HARD_FRAME_POINTER_REGNUM && TARGET_ARM) ? 0 : \
1913 #define THUMB_REG_PUSHED_P(reg) \
1914 (regs_ever_live [reg] \
1915 && (! call_used_regs [reg] \
1916 || (flag_pic && (reg) == PIC_OFFSET_TABLE_REGNUM)) \
1917 && !(TARGET_SINGLE_PIC_BASE && ((reg) == arm_pic_register)))
1919 /* Define the offset between two registers, one to be eliminated, and the
1920 other its replacement, at the start of a routine. */
1921 #define ARM_INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1924 (OFFSET) = arm_compute_initial_elimination_offset (FROM, TO); \
1928 /* Note: This macro must match the code in thumb_function_prologue(). */
1929 #define THUMB_INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1932 if ((FROM) == ARG_POINTER_REGNUM) \
1934 int count_regs = 0; \
1936 for (regno = 8; regno < 13; regno ++) \
1937 if (THUMB_REG_PUSHED_P (regno)) \
1940 (OFFSET) += 4 * count_regs; \
1942 for (regno = 0; regno <= LAST_LO_REGNUM; regno ++) \
1943 if (THUMB_REG_PUSHED_P (regno)) \
1945 if (count_regs || ! leaf_function_p () || thumb_far_jump_used_p (0))\
1946 (OFFSET) += 4 * (count_regs + 1); \
1947 if (TARGET_BACKTRACE) \
1949 if ((count_regs & 0xFF) == 0 && (regs_ever_live[3] != 0)) \
1955 if ((TO) == STACK_POINTER_REGNUM) \
1957 (OFFSET) += current_function_outgoing_args_size; \
1958 (OFFSET) += thumb_get_frame_size (); \
1962 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1964 ARM_INITIAL_ELIMINATION_OFFSET (FROM, TO, OFFSET); \
1966 THUMB_INITIAL_ELIMINATION_OFFSET (FROM, TO, OFFSET)
1968 /* Special case handling of the location of arguments passed on the stack. */
1969 #define DEBUGGER_ARG_OFFSET(value, addr) value ? value : arm_debugger_arg_offset (value, addr)
1971 /* Initialize data used by insn expanders. This is called from insn_emit,
1972 once for every function before code is generated. */
1973 #define INIT_EXPANDERS arm_init_expanders ()
1975 /* Output assembler code for a block containing the constant parts
1976 of a trampoline, leaving space for the variable parts.
1978 On the ARM, (if r8 is the static chain regnum, and remembering that
1979 referencing pc adds an offset of 8) the trampoline looks like:
1982 .word static chain value
1983 .word function's address
1984 XXX FIXME: When the trampoline returns, r8 will be clobbered. */
1985 #define ARM_TRAMPOLINE_TEMPLATE(FILE) \
1987 asm_fprintf (FILE, "\tldr\t%r, [%r, #0]\n", \
1988 STATIC_CHAIN_REGNUM, PC_REGNUM); \
1989 asm_fprintf (FILE, "\tldr\t%r, [%r, #0]\n", \
1990 PC_REGNUM, PC_REGNUM); \
1991 assemble_aligned_integer (UNITS_PER_WORD, const0_rtx); \
1992 assemble_aligned_integer (UNITS_PER_WORD, const0_rtx); \
1995 /* On the Thumb we always switch into ARM mode to execute the trampoline.
1996 Why - because it is easier. This code will always be branched to via
1997 a BX instruction and since the compiler magically generates the address
1998 of the function the linker has no opportunity to ensure that the
1999 bottom bit is set. Thus the processor will be in ARM mode when it
2000 reaches this code. So we duplicate the ARM trampoline code and add
2001 a switch into Thumb mode as well. */
2002 #define THUMB_TRAMPOLINE_TEMPLATE(FILE) \
2004 fprintf (FILE, "\t.code 32\n"); \
2005 fprintf (FILE, ".Ltrampoline_start:\n"); \
2006 asm_fprintf (FILE, "\tldr\t%r, [%r, #8]\n", \
2007 STATIC_CHAIN_REGNUM, PC_REGNUM); \
2008 asm_fprintf (FILE, "\tldr\t%r, [%r, #8]\n", \
2009 IP_REGNUM, PC_REGNUM); \
2010 asm_fprintf (FILE, "\torr\t%r, %r, #1\n", \
2011 IP_REGNUM, IP_REGNUM); \
2012 asm_fprintf (FILE, "\tbx\t%r\n", IP_REGNUM); \
2013 fprintf (FILE, "\t.word\t0\n"); \
2014 fprintf (FILE, "\t.word\t0\n"); \
2015 fprintf (FILE, "\t.code 16\n"); \
2018 #define TRAMPOLINE_TEMPLATE(FILE) \
2020 ARM_TRAMPOLINE_TEMPLATE (FILE) \
2022 THUMB_TRAMPOLINE_TEMPLATE (FILE)
2024 /* Length in units of the trampoline for entering a nested function. */
2025 #define TRAMPOLINE_SIZE (TARGET_ARM ? 16 : 24)
2027 /* Alignment required for a trampoline in bits. */
2028 #define TRAMPOLINE_ALIGNMENT 32
2030 /* Emit RTL insns to initialize the variable parts of a trampoline.
2031 FNADDR is an RTX for the address of the function's pure code.
2032 CXT is an RTX for the static chain value for the function. */
2033 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
2036 (gen_rtx_MEM (SImode, plus_constant (TRAMP, TARGET_ARM ? 8 : 16)), CXT); \
2038 (gen_rtx_MEM (SImode, plus_constant (TRAMP, TARGET_ARM ? 12 : 20)), FNADDR); \
2042 /* Addressing modes, and classification of registers for them. */
2043 #define HAVE_POST_INCREMENT 1
2044 #define HAVE_PRE_INCREMENT TARGET_ARM
2045 #define HAVE_POST_DECREMENT TARGET_ARM
2046 #define HAVE_PRE_DECREMENT TARGET_ARM
2047 #define HAVE_PRE_MODIFY_DISP TARGET_ARM
2048 #define HAVE_POST_MODIFY_DISP TARGET_ARM
2049 #define HAVE_PRE_MODIFY_REG TARGET_ARM
2050 #define HAVE_POST_MODIFY_REG TARGET_ARM
2052 /* Macros to check register numbers against specific register classes. */
2054 /* These assume that REGNO is a hard or pseudo reg number.
2055 They give nonzero only if REGNO is a hard reg of the suitable class
2056 or a pseudo reg currently allocated to a suitable hard reg.
2057 Since they use reg_renumber, they are safe only once reg_renumber
2058 has been allocated, which happens in local-alloc.c. */
2059 #define TEST_REGNO(R, TEST, VALUE) \
2060 ((R TEST VALUE) || ((unsigned) reg_renumber[R] TEST VALUE))
2062 /* On the ARM, don't allow the pc to be used. */
2063 #define ARM_REGNO_OK_FOR_BASE_P(REGNO) \
2064 (TEST_REGNO (REGNO, <, PC_REGNUM) \
2065 || TEST_REGNO (REGNO, ==, FRAME_POINTER_REGNUM) \
2066 || TEST_REGNO (REGNO, ==, ARG_POINTER_REGNUM))
2068 #define THUMB_REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
2069 (TEST_REGNO (REGNO, <=, LAST_LO_REGNUM) \
2070 || (GET_MODE_SIZE (MODE) >= 4 \
2071 && TEST_REGNO (REGNO, ==, STACK_POINTER_REGNUM)))
2073 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
2075 ? THUMB_REGNO_MODE_OK_FOR_BASE_P (REGNO, MODE) \
2076 : ARM_REGNO_OK_FOR_BASE_P (REGNO))
2078 /* For ARM code, we don't care about the mode, but for Thumb, the index
2079 must be suitable for use in a QImode load. */
2080 #define REGNO_OK_FOR_INDEX_P(REGNO) \
2081 REGNO_MODE_OK_FOR_BASE_P (REGNO, QImode)
2083 /* Maximum number of registers that can appear in a valid memory address.
2084 Shifts in addresses can't be by a register. */
2085 #define MAX_REGS_PER_ADDRESS 2
2087 /* Recognize any constant value that is a valid address. */
2088 /* XXX We can address any constant, eventually... */
2090 #ifdef AOF_ASSEMBLER
2092 #define CONSTANT_ADDRESS_P(X) \
2093 (GET_CODE (X) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (X))
2097 #define CONSTANT_ADDRESS_P(X) \
2098 (GET_CODE (X) == SYMBOL_REF \
2099 && (CONSTANT_POOL_ADDRESS_P (X) \
2100 || (TARGET_ARM && optimize > 0 && SYMBOL_REF_FLAG (X))))
2102 #endif /* AOF_ASSEMBLER */
2104 /* Nonzero if the constant value X is a legitimate general operand.
2105 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
2107 On the ARM, allow any integer (invalid ones are removed later by insn
2108 patterns), nice doubles and symbol_refs which refer to the function's
2111 When generating pic allow anything. */
2112 #define ARM_LEGITIMATE_CONSTANT_P(X) (flag_pic || ! label_mentioned_p (X))
2114 #define THUMB_LEGITIMATE_CONSTANT_P(X) \
2115 ( GET_CODE (X) == CONST_INT \
2116 || GET_CODE (X) == CONST_DOUBLE \
2117 || CONSTANT_ADDRESS_P (X) \
2120 #define LEGITIMATE_CONSTANT_P(X) \
2121 (TARGET_ARM ? ARM_LEGITIMATE_CONSTANT_P (X) : THUMB_LEGITIMATE_CONSTANT_P (X))
2123 /* Special characters prefixed to function names
2124 in order to encode attribute like information.
2125 Note, '@' and '*' have already been taken. */
2126 #define SHORT_CALL_FLAG_CHAR '^'
2127 #define LONG_CALL_FLAG_CHAR '#'
2129 #define ENCODED_SHORT_CALL_ATTR_P(SYMBOL_NAME) \
2130 (*(SYMBOL_NAME) == SHORT_CALL_FLAG_CHAR)
2132 #define ENCODED_LONG_CALL_ATTR_P(SYMBOL_NAME) \
2133 (*(SYMBOL_NAME) == LONG_CALL_FLAG_CHAR)
2135 #ifndef SUBTARGET_NAME_ENCODING_LENGTHS
2136 #define SUBTARGET_NAME_ENCODING_LENGTHS
2139 /* This is a C fragment for the inside of a switch statement.
2140 Each case label should return the number of characters to
2141 be stripped from the start of a function's name, if that
2142 name starts with the indicated character. */
2143 #define ARM_NAME_ENCODING_LENGTHS \
2144 case SHORT_CALL_FLAG_CHAR: return 1; \
2145 case LONG_CALL_FLAG_CHAR: return 1; \
2146 case '*': return 1; \
2147 SUBTARGET_NAME_ENCODING_LENGTHS
2149 /* This is how to output a reference to a user-level label named NAME.
2150 `assemble_name' uses this. */
2151 #undef ASM_OUTPUT_LABELREF
2152 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
2153 arm_asm_output_labelref (FILE, NAME)
2155 #define ARM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
2156 arm_encode_call_attribute (DECL, SHORT_CALL_FLAG_CHAR)
2158 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
2159 and check its validity for a certain class.
2160 We have two alternate definitions for each of them.
2161 The usual definition accepts all pseudo regs; the other rejects
2162 them unless they have been allocated suitable hard regs.
2163 The symbol REG_OK_STRICT causes the latter definition to be used. */
2164 #ifndef REG_OK_STRICT
2166 #define ARM_REG_OK_FOR_BASE_P(X) \
2167 (REGNO (X) <= LAST_ARM_REGNUM \
2168 || REGNO (X) >= FIRST_PSEUDO_REGISTER \
2169 || REGNO (X) == FRAME_POINTER_REGNUM \
2170 || REGNO (X) == ARG_POINTER_REGNUM)
2172 #define THUMB_REG_MODE_OK_FOR_BASE_P(X, MODE) \
2173 (REGNO (X) <= LAST_LO_REGNUM \
2174 || REGNO (X) >= FIRST_PSEUDO_REGISTER \
2175 || (GET_MODE_SIZE (MODE) >= 4 \
2176 && (REGNO (X) == STACK_POINTER_REGNUM \
2177 || (X) == hard_frame_pointer_rtx \
2178 || (X) == arg_pointer_rtx)))
2180 #define REG_STRICT_P 0
2182 #else /* REG_OK_STRICT */
2184 #define ARM_REG_OK_FOR_BASE_P(X) \
2185 ARM_REGNO_OK_FOR_BASE_P (REGNO (X))
2187 #define THUMB_REG_MODE_OK_FOR_BASE_P(X, MODE) \
2188 THUMB_REGNO_MODE_OK_FOR_BASE_P (REGNO (X), MODE)
2190 #define REG_STRICT_P 1
2192 #endif /* REG_OK_STRICT */
2194 /* Now define some helpers in terms of the above. */
2196 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
2198 ? THUMB_REG_MODE_OK_FOR_BASE_P (X, MODE) \
2199 : ARM_REG_OK_FOR_BASE_P (X))
2201 #define ARM_REG_OK_FOR_INDEX_P(X) ARM_REG_OK_FOR_BASE_P (X)
2203 /* For Thumb, a valid index register is anything that can be used in
2204 a byte load instruction. */
2205 #define THUMB_REG_OK_FOR_INDEX_P(X) THUMB_REG_MODE_OK_FOR_BASE_P (X, QImode)
2207 /* Nonzero if X is a hard reg that can be used as an index
2208 or if it is a pseudo reg. On the Thumb, the stack pointer
2210 #define REG_OK_FOR_INDEX_P(X) \
2212 ? THUMB_REG_OK_FOR_INDEX_P (X) \
2213 : ARM_REG_OK_FOR_INDEX_P (X))
2216 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
2217 that is a valid memory address for an instruction.
2218 The MODE argument is the machine mode for the MEM expression
2219 that wants to use this address. */
2221 #define ARM_BASE_REGISTER_RTX_P(X) \
2222 (GET_CODE (X) == REG && ARM_REG_OK_FOR_BASE_P (X))
2224 #define ARM_INDEX_REGISTER_RTX_P(X) \
2225 (GET_CODE (X) == REG && ARM_REG_OK_FOR_INDEX_P (X))
2227 #define ARM_GO_IF_LEGITIMATE_ADDRESS(MODE,X,WIN) \
2229 if (arm_legitimate_address_p (MODE, X, REG_STRICT_P)) \
2233 #define THUMB_GO_IF_LEGITIMATE_ADDRESS(MODE,X,WIN) \
2235 if (thumb_legitimate_address_p (MODE, X, REG_STRICT_P)) \
2239 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, WIN) \
2241 ARM_GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN) \
2242 else /* if (TARGET_THUMB) */ \
2243 THUMB_GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN)
2246 /* Try machine-dependent ways of modifying an illegitimate address
2247 to be legitimate. If we find one, return the new, valid address. */
2248 #define ARM_LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2250 X = arm_legitimize_address (X, OLDX, MODE); \
2252 if (memory_address_p (MODE, X)) \
2256 #define THUMB_LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2259 (X) = legitimize_pic_address (OLDX, MODE, NULL_RTX); \
2262 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2265 ARM_LEGITIMIZE_ADDRESS (X, OLDX, MODE, WIN); \
2267 THUMB_LEGITIMIZE_ADDRESS (X, OLDX, MODE, WIN); \
2270 /* Go to LABEL if ADDR (a legitimate address expression)
2271 has an effect that depends on the machine mode it is used for. */
2272 #define ARM_GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
2274 if ( GET_CODE (ADDR) == PRE_DEC || GET_CODE (ADDR) == POST_DEC \
2275 || GET_CODE (ADDR) == PRE_INC || GET_CODE (ADDR) == POST_INC) \
2279 /* Nothing helpful to do for the Thumb */
2280 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
2282 ARM_GO_IF_MODE_DEPENDENT_ADDRESS (ADDR, LABEL)
2285 /* Specify the machine mode that this machine uses
2286 for the index in the tablejump instruction. */
2287 #define CASE_VECTOR_MODE Pmode
2289 /* Define as C expression which evaluates to nonzero if the tablejump
2290 instruction expects the table to contain offsets from the address of the
2292 Do not define this if the table should contain absolute addresses. */
2293 /* #define CASE_VECTOR_PC_RELATIVE 1 */
2295 /* signed 'char' is most compatible, but RISC OS wants it unsigned.
2296 unsigned is probably best, but may break some code. */
2297 #ifndef DEFAULT_SIGNED_CHAR
2298 #define DEFAULT_SIGNED_CHAR 0
2301 /* Don't cse the address of the function being compiled. */
2302 #define NO_RECURSIVE_FUNCTION_CSE 1
2304 /* Max number of bytes we can move from memory to memory
2305 in one reasonably fast instruction. */
2309 #define MOVE_RATIO (arm_tune_xscale ? 4 : 2)
2311 /* Define if operations between registers always perform the operation
2312 on the full register even if a narrower mode is specified. */
2313 #define WORD_REGISTER_OPERATIONS
2315 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD
2316 will either zero-extend or sign-extend. The value of this macro should
2317 be the code that says which one of the two operations is implicitly
2318 done, NIL if none. */
2319 #define LOAD_EXTEND_OP(MODE) \
2320 (TARGET_THUMB ? ZERO_EXTEND : \
2321 ((arm_arch4 || (MODE) == QImode) ? ZERO_EXTEND \
2322 : ((BYTES_BIG_ENDIAN && (MODE) == HImode) ? SIGN_EXTEND : NIL)))
2324 /* Nonzero if access to memory by bytes is slow and undesirable. */
2325 #define SLOW_BYTE_ACCESS 0
2327 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 1
2329 /* Immediate shift counts are truncated by the output routines (or was it
2330 the assembler?). Shift counts in a register are truncated by ARM. Note
2331 that the native compiler puts too large (> 32) immediate shift counts
2332 into a register and shifts by the register, letting the ARM decide what
2333 to do instead of doing that itself. */
2334 /* This is all wrong. Defining SHIFT_COUNT_TRUNCATED tells combine that
2335 code like (X << (Y % 32)) for register X, Y is equivalent to (X << Y).
2336 On the arm, Y in a register is used modulo 256 for the shift. Only for
2337 rotates is modulo 32 used. */
2338 /* #define SHIFT_COUNT_TRUNCATED 1 */
2340 /* All integers have the same format so truncation is easy. */
2341 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
2343 /* Calling from registers is a massive pain. */
2344 #define NO_FUNCTION_CSE 1
2346 /* Chars and shorts should be passed as ints. */
2347 #define PROMOTE_PROTOTYPES 1
2349 /* The machine modes of pointers and functions */
2350 #define Pmode SImode
2351 #define FUNCTION_MODE Pmode
2353 #define ARM_FRAME_RTX(X) \
2354 ( (X) == frame_pointer_rtx || (X) == stack_pointer_rtx \
2355 || (X) == arg_pointer_rtx)
2357 /* Moves to and from memory are quite expensive */
2358 #define MEMORY_MOVE_COST(M, CLASS, IN) \
2359 (TARGET_ARM ? 10 : \
2360 ((GET_MODE_SIZE (M) < 4 ? 8 : 2 * GET_MODE_SIZE (M)) \
2361 * (CLASS == LO_REGS ? 1 : 2)))
2363 /* Try to generate sequences that don't involve branches, we can then use
2364 conditional instructions */
2365 #define BRANCH_COST \
2366 (TARGET_ARM ? 4 : (optimize > 1 ? 1 : 0))
2368 /* Position Independent Code. */
2369 /* We decide which register to use based on the compilation options and
2370 the assembler in use; this is more general than the APCS restriction of
2371 using sb (r9) all the time. */
2372 extern int arm_pic_register;
2374 /* Used when parsing command line option -mpic-register=. */
2375 extern const char * arm_pic_register_string;
2377 /* The register number of the register used to address a table of static
2378 data addresses in memory. */
2379 #define PIC_OFFSET_TABLE_REGNUM arm_pic_register
2381 #define FINALIZE_PIC arm_finalize_pic (1)
2383 /* We can't directly access anything that contains a symbol,
2384 nor can we indirect via the constant pool. */
2385 #define LEGITIMATE_PIC_OPERAND_P(X) \
2386 (!(symbol_mentioned_p (X) \
2387 || label_mentioned_p (X) \
2388 || (GET_CODE (X) == SYMBOL_REF \
2389 && CONSTANT_POOL_ADDRESS_P (X) \
2390 && (symbol_mentioned_p (get_pool_constant (X)) \
2391 || label_mentioned_p (get_pool_constant (X))))))
2393 /* We need to know when we are making a constant pool; this determines
2394 whether data needs to be in the GOT or can be referenced via a GOT
2396 extern int making_const_table;
2398 /* Handle pragmas for compatibility with Intel's compilers. */
2399 #define REGISTER_TARGET_PRAGMAS() do { \
2400 c_register_pragma (0, "long_calls", arm_pr_long_calls); \
2401 c_register_pragma (0, "no_long_calls", arm_pr_no_long_calls); \
2402 c_register_pragma (0, "long_calls_off", arm_pr_long_calls_off); \
2405 /* Condition code information. */
2406 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
2407 return the mode to be used for the comparison. */
2409 #define SELECT_CC_MODE(OP, X, Y) arm_select_cc_mode (OP, X, Y)
2411 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode)
2413 #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) \
2416 if (GET_CODE (OP1) == CONST_INT \
2417 && ! (const_ok_for_arm (INTVAL (OP1)) \
2418 || (const_ok_for_arm (- INTVAL (OP1))))) \
2420 rtx const_op = OP1; \
2421 CODE = arm_canonicalize_comparison ((CODE), &const_op); \
2427 /* The arm5 clz instruction returns 32. */
2428 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1)
2431 #define ASM_APP_OFF (TARGET_THUMB ? "\t.code\t16\n" : "")
2433 /* Output a push or a pop instruction (only used when profiling). */
2434 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
2438 asm_fprintf (STREAM,"\tstmfd\t%r!,{%r}\n", \
2439 STACK_POINTER_REGNUM, REGNO); \
2441 asm_fprintf (STREAM, "\tpush {%r}\n", REGNO); \
2445 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
2449 asm_fprintf (STREAM, "\tldmfd\t%r!,{%r}\n", \
2450 STACK_POINTER_REGNUM, REGNO); \
2452 asm_fprintf (STREAM, "\tpop {%r}\n", REGNO); \
2455 /* This is how to output a label which precedes a jumptable. Since
2456 Thumb instructions are 2 bytes, we may need explicit alignment here. */
2457 #undef ASM_OUTPUT_CASE_LABEL
2458 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
2462 ASM_OUTPUT_ALIGN (FILE, 2); \
2463 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); \
2467 #define ARM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
2472 if (is_called_in_ARM_mode (DECL)) \
2473 fprintf (STREAM, "\t.code 32\n") ; \
2475 fprintf (STREAM, "\t.thumb_func\n") ; \
2477 if (TARGET_POKE_FUNCTION_NAME) \
2478 arm_poke_function_name (STREAM, (char *) NAME); \
2482 /* For aliases of functions we use .thumb_set instead. */
2483 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL1, DECL2) \
2486 const char *const LABEL1 = XSTR (XEXP (DECL_RTL (decl), 0), 0); \
2487 const char *const LABEL2 = IDENTIFIER_POINTER (DECL2); \
2489 if (TARGET_THUMB && TREE_CODE (DECL1) == FUNCTION_DECL) \
2491 fprintf (FILE, "\t.thumb_set "); \
2492 assemble_name (FILE, LABEL1); \
2493 fprintf (FILE, ","); \
2494 assemble_name (FILE, LABEL2); \
2495 fprintf (FILE, "\n"); \
2498 ASM_OUTPUT_DEF (FILE, LABEL1, LABEL2); \
2502 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
2503 /* To support -falign-* switches we need to use .p2align so
2504 that alignment directives in code sections will be padded
2505 with no-op instructions, rather than zeroes. */
2506 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
2509 if ((MAX_SKIP) == 0) \
2510 fprintf ((FILE), "\t.p2align %d\n", (int) (LOG)); \
2512 fprintf ((FILE), "\t.p2align %d,,%d\n", \
2513 (int) (LOG), (int) (MAX_SKIP)); \
2517 /* Only perform branch elimination (by making instructions conditional) if
2518 we're optimizing. Otherwise it's of no use anyway. */
2519 #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \
2520 if (TARGET_ARM && optimize) \
2521 arm_final_prescan_insn (INSN); \
2522 else if (TARGET_THUMB) \
2523 thumb_final_prescan_insn (INSN)
2525 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
2526 (CODE == '@' || CODE == '|' \
2527 || (TARGET_ARM && (CODE == '?')) \
2528 || (TARGET_THUMB && (CODE == '_')))
2530 /* Output an operand of an instruction. */
2531 #define PRINT_OPERAND(STREAM, X, CODE) \
2532 arm_print_operand (STREAM, X, CODE)
2534 #define ARM_SIGN_EXTEND(x) ((HOST_WIDE_INT) \
2535 (HOST_BITS_PER_WIDE_INT <= 32 ? (unsigned HOST_WIDE_INT) (x) \
2536 : ((((unsigned HOST_WIDE_INT)(x)) & (unsigned HOST_WIDE_INT) 0xffffffff) |\
2537 ((((unsigned HOST_WIDE_INT)(x)) & (unsigned HOST_WIDE_INT) 0x80000000) \
2538 ? ((~ (unsigned HOST_WIDE_INT) 0) \
2539 & ~ (unsigned HOST_WIDE_INT) 0xffffffff) \
2542 /* Output the address of an operand. */
2543 #define ARM_PRINT_OPERAND_ADDRESS(STREAM, X) \
2545 int is_minus = GET_CODE (X) == MINUS; \
2547 if (GET_CODE (X) == REG) \
2548 asm_fprintf (STREAM, "[%r, #0]", REGNO (X)); \
2549 else if (GET_CODE (X) == PLUS || is_minus) \
2551 rtx base = XEXP (X, 0); \
2552 rtx index = XEXP (X, 1); \
2553 HOST_WIDE_INT offset = 0; \
2554 if (GET_CODE (base) != REG) \
2556 /* Ensure that BASE is a register */ \
2557 /* (one of them must be). */ \
2562 switch (GET_CODE (index)) \
2565 offset = INTVAL (index); \
2568 asm_fprintf (STREAM, "[%r, #%wd]", \
2569 REGNO (base), offset); \
2573 asm_fprintf (STREAM, "[%r, %s%r]", \
2574 REGNO (base), is_minus ? "-" : "", \
2584 asm_fprintf (STREAM, "[%r, %s%r", \
2585 REGNO (base), is_minus ? "-" : "", \
2586 REGNO (XEXP (index, 0))); \
2587 arm_print_operand (STREAM, index, 'S'); \
2588 fputs ("]", STREAM); \
2596 else if (GET_CODE (X) == PRE_INC || GET_CODE (X) == POST_INC \
2597 || GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_DEC) \
2599 extern enum machine_mode output_memory_reference_mode; \
2601 if (GET_CODE (XEXP (X, 0)) != REG) \
2604 if (GET_CODE (X) == PRE_DEC || GET_CODE (X) == PRE_INC) \
2605 asm_fprintf (STREAM, "[%r, #%s%d]!", \
2606 REGNO (XEXP (X, 0)), \
2607 GET_CODE (X) == PRE_DEC ? "-" : "", \
2608 GET_MODE_SIZE (output_memory_reference_mode)); \
2610 asm_fprintf (STREAM, "[%r], #%s%d", \
2611 REGNO (XEXP (X, 0)), \
2612 GET_CODE (X) == POST_DEC ? "-" : "", \
2613 GET_MODE_SIZE (output_memory_reference_mode)); \
2615 else if (GET_CODE (X) == PRE_MODIFY) \
2617 asm_fprintf (STREAM, "[%r, ", REGNO (XEXP (X, 0))); \
2618 if (GET_CODE (XEXP (XEXP (X, 1), 1)) == CONST_INT) \
2619 asm_fprintf (STREAM, "#%wd]!", \
2620 INTVAL (XEXP (XEXP (X, 1), 1))); \
2622 asm_fprintf (STREAM, "%r]!", \
2623 REGNO (XEXP (XEXP (X, 1), 1))); \
2625 else if (GET_CODE (X) == POST_MODIFY) \
2627 asm_fprintf (STREAM, "[%r], ", REGNO (XEXP (X, 0))); \
2628 if (GET_CODE (XEXP (XEXP (X, 1), 1)) == CONST_INT) \
2629 asm_fprintf (STREAM, "#%wd", \
2630 INTVAL (XEXP (XEXP (X, 1), 1))); \
2632 asm_fprintf (STREAM, "%r", \
2633 REGNO (XEXP (XEXP (X, 1), 1))); \
2635 else output_addr_const (STREAM, X); \
2638 #define THUMB_PRINT_OPERAND_ADDRESS(STREAM, X) \
2640 if (GET_CODE (X) == REG) \
2641 asm_fprintf (STREAM, "[%r]", REGNO (X)); \
2642 else if (GET_CODE (X) == POST_INC) \
2643 asm_fprintf (STREAM, "%r!", REGNO (XEXP (X, 0))); \
2644 else if (GET_CODE (X) == PLUS) \
2646 if (GET_CODE (XEXP (X, 0)) != REG) \
2648 if (GET_CODE (XEXP (X, 1)) == CONST_INT) \
2649 asm_fprintf (STREAM, "[%r, #%wd]", \
2650 REGNO (XEXP (X, 0)), \
2651 INTVAL (XEXP (X, 1))); \
2653 asm_fprintf (STREAM, "[%r, %r]", \
2654 REGNO (XEXP (X, 0)), \
2655 REGNO (XEXP (X, 1))); \
2658 output_addr_const (STREAM, X); \
2661 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
2663 ARM_PRINT_OPERAND_ADDRESS (STREAM, X) \
2665 THUMB_PRINT_OPERAND_ADDRESS (STREAM, X)
2667 #define OUTPUT_ADDR_CONST_EXTRA(FILE, X, FAIL) \
2668 if (GET_CODE (X) != CONST_VECTOR \
2669 || ! arm_emit_vector_const (FILE, X)) \
2672 /* A C expression whose value is RTL representing the value of the return
2673 address for the frame COUNT steps up from the current frame. */
2675 #define RETURN_ADDR_RTX(COUNT, FRAME) \
2676 arm_return_addr (COUNT, FRAME)
2678 /* Mask of the bits in the PC that contain the real return address
2679 when running in 26-bit mode. */
2680 #define RETURN_ADDR_MASK26 (0x03fffffc)
2682 /* Pick up the return address upon entry to a procedure. Used for
2683 dwarf2 unwind information. This also enables the table driven
2685 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, LR_REGNUM)
2686 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (LR_REGNUM)
2688 /* Used to mask out junk bits from the return address, such as
2689 processor state, interrupt status, condition codes and the like. */
2690 #define MASK_RETURN_ADDR \
2691 /* If we are generating code for an ARM2/ARM3 machine or for an ARM6 \
2692 in 26 bit mode, the condition codes must be masked out of the \
2693 return address. This does not apply to ARM6 and later processors \
2694 when running in 32 bit mode. */ \
2695 ((!TARGET_APCS_32) ? (gen_int_mode (RETURN_ADDR_MASK26, Pmode)) \
2696 : (arm_arch4 || TARGET_THUMB) ? \
2697 (gen_int_mode ((unsigned long)0xffffffff, Pmode)) \
2698 : arm_gen_return_addr_mask ())
2701 /* Define the codes that are matched by predicates in arm.c */
2702 #define PREDICATE_CODES \
2703 {"s_register_operand", {SUBREG, REG}}, \
2704 {"arm_hard_register_operand", {REG}}, \
2705 {"f_register_operand", {SUBREG, REG}}, \
2706 {"arm_add_operand", {SUBREG, REG, CONST_INT}}, \
2707 {"arm_addimm_operand", {CONST_INT}}, \
2708 {"fpa_add_operand", {SUBREG, REG, CONST_DOUBLE}}, \
2709 {"fpa_rhs_operand", {SUBREG, REG, CONST_DOUBLE}}, \
2710 {"arm_rhs_operand", {SUBREG, REG, CONST_INT}}, \
2711 {"arm_not_operand", {SUBREG, REG, CONST_INT}}, \
2712 {"reg_or_int_operand", {SUBREG, REG, CONST_INT}}, \
2713 {"index_operand", {SUBREG, REG, CONST_INT}}, \
2714 {"thumb_cmp_operand", {SUBREG, REG, CONST_INT}}, \
2715 {"thumb_cmpneg_operand", {CONST_INT}}, \
2716 {"thumb_cbrch_target_operand", {SUBREG, REG, MEM}}, \
2717 {"offsettable_memory_operand", {MEM}}, \
2718 {"bad_signed_byte_operand", {MEM}}, \
2719 {"alignable_memory_operand", {MEM}}, \
2720 {"shiftable_operator", {PLUS, MINUS, AND, IOR, XOR}}, \
2721 {"minmax_operator", {SMIN, SMAX, UMIN, UMAX}}, \
2722 {"shift_operator", {ASHIFT, ASHIFTRT, LSHIFTRT, ROTATERT, MULT}}, \
2723 {"di_operand", {SUBREG, REG, CONST_INT, CONST_DOUBLE, MEM}}, \
2724 {"nonimmediate_di_operand", {SUBREG, REG, MEM}}, \
2725 {"soft_df_operand", {SUBREG, REG, CONST_DOUBLE, MEM}}, \
2726 {"nonimmediate_soft_df_operand", {SUBREG, REG, MEM}}, \
2727 {"load_multiple_operation", {PARALLEL}}, \
2728 {"store_multiple_operation", {PARALLEL}}, \
2729 {"equality_operator", {EQ, NE}}, \
2730 {"arm_comparison_operator", {EQ, NE, LE, LT, GE, GT, GEU, GTU, LEU, \
2731 LTU, UNORDERED, ORDERED, UNLT, UNLE, \
2733 {"arm_rhsm_operand", {SUBREG, REG, CONST_INT, MEM}}, \
2734 {"const_shift_operand", {CONST_INT}}, \
2735 {"multi_register_push", {PARALLEL}}, \
2736 {"cc_register", {REG}}, \
2737 {"logical_binary_operator", {AND, IOR, XOR}}, \
2738 {"cirrus_register_operand", {REG}}, \
2739 {"cirrus_fp_register", {REG}}, \
2740 {"cirrus_shift_const", {CONST_INT}}, \
2741 {"dominant_cc_register", {REG}},
2743 /* Define this if you have special predicates that know special things
2744 about modes. Genrecog will warn about certain forms of
2745 match_operand without a mode; if the operand predicate is listed in
2746 SPECIAL_MODE_PREDICATES, the warning will be suppressed. */
2747 #define SPECIAL_MODE_PREDICATES \
2748 "cc_register", "dominant_cc_register",
2757 ARM_BUILTIN_WAVG2BR,
2758 ARM_BUILTIN_WAVG2HR,
2785 ARM_BUILTIN_TMOVMSKB,
2786 ARM_BUILTIN_TMOVMSKH,
2787 ARM_BUILTIN_TMOVMSKW,
2796 ARM_BUILTIN_WPACKHSS,
2797 ARM_BUILTIN_WPACKWSS,
2798 ARM_BUILTIN_WPACKDSS,
2799 ARM_BUILTIN_WPACKHUS,
2800 ARM_BUILTIN_WPACKWUS,
2801 ARM_BUILTIN_WPACKDUS,
2806 ARM_BUILTIN_WADDSSB,
2807 ARM_BUILTIN_WADDSSH,
2808 ARM_BUILTIN_WADDSSW,
2809 ARM_BUILTIN_WADDUSB,
2810 ARM_BUILTIN_WADDUSH,
2811 ARM_BUILTIN_WADDUSW,
2815 ARM_BUILTIN_WSUBSSB,
2816 ARM_BUILTIN_WSUBSSH,
2817 ARM_BUILTIN_WSUBSSW,
2818 ARM_BUILTIN_WSUBUSB,
2819 ARM_BUILTIN_WSUBUSH,
2820 ARM_BUILTIN_WSUBUSW,
2827 ARM_BUILTIN_WCMPEQB,
2828 ARM_BUILTIN_WCMPEQH,
2829 ARM_BUILTIN_WCMPEQW,
2830 ARM_BUILTIN_WCMPGTUB,
2831 ARM_BUILTIN_WCMPGTUH,
2832 ARM_BUILTIN_WCMPGTUW,
2833 ARM_BUILTIN_WCMPGTSB,
2834 ARM_BUILTIN_WCMPGTSH,
2835 ARM_BUILTIN_WCMPGTSW,
2837 ARM_BUILTIN_TEXTRMSB,
2838 ARM_BUILTIN_TEXTRMSH,
2839 ARM_BUILTIN_TEXTRMSW,
2840 ARM_BUILTIN_TEXTRMUB,
2841 ARM_BUILTIN_TEXTRMUH,
2842 ARM_BUILTIN_TEXTRMUW,
2892 ARM_BUILTIN_WUNPCKIHB,
2893 ARM_BUILTIN_WUNPCKIHH,
2894 ARM_BUILTIN_WUNPCKIHW,
2895 ARM_BUILTIN_WUNPCKILB,
2896 ARM_BUILTIN_WUNPCKILH,
2897 ARM_BUILTIN_WUNPCKILW,
2899 ARM_BUILTIN_WUNPCKEHSB,
2900 ARM_BUILTIN_WUNPCKEHSH,
2901 ARM_BUILTIN_WUNPCKEHSW,
2902 ARM_BUILTIN_WUNPCKEHUB,
2903 ARM_BUILTIN_WUNPCKEHUH,
2904 ARM_BUILTIN_WUNPCKEHUW,
2905 ARM_BUILTIN_WUNPCKELSB,
2906 ARM_BUILTIN_WUNPCKELSH,
2907 ARM_BUILTIN_WUNPCKELSW,
2908 ARM_BUILTIN_WUNPCKELUB,
2909 ARM_BUILTIN_WUNPCKELUH,
2910 ARM_BUILTIN_WUNPCKELUW,
2914 #endif /* ! GCC_ARM_H */
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