1 /* Definitions of target machine for GNU compiler, for ARM.
2 Copyright (C) 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
3 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 GNU CC.
11 GNU CC is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2, or (at your option)
16 GNU CC is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with GNU CC; see the file COPYING. If not, write to
23 the Free Software Foundation, 59 Temple Place - Suite 330,
24 Boston, MA 02111-1307, USA. */
29 #define TARGET_CPU_arm2 0x0000
30 #define TARGET_CPU_arm250 0x0000
31 #define TARGET_CPU_arm3 0x0000
32 #define TARGET_CPU_arm6 0x0001
33 #define TARGET_CPU_arm600 0x0001
34 #define TARGET_CPU_arm610 0x0002
35 #define TARGET_CPU_arm7 0x0001
36 #define TARGET_CPU_arm7m 0x0004
37 #define TARGET_CPU_arm7dm 0x0004
38 #define TARGET_CPU_arm7dmi 0x0004
39 #define TARGET_CPU_arm700 0x0001
40 #define TARGET_CPU_arm710 0x0002
41 #define TARGET_CPU_arm7100 0x0002
42 #define TARGET_CPU_arm7500 0x0002
43 #define TARGET_CPU_arm7500fe 0x1001
44 #define TARGET_CPU_arm7tdmi 0x0008
45 #define TARGET_CPU_arm8 0x0010
46 #define TARGET_CPU_arm810 0x0020
47 #define TARGET_CPU_strongarm 0x0040
48 #define TARGET_CPU_strongarm110 0x0040
49 #define TARGET_CPU_strongarm1100 0x0040
50 #define TARGET_CPU_arm9 0x0080
51 #define TARGET_CPU_arm9tdmi 0x0080
52 #define TARGET_CPU_xscale 0x0100
53 /* Configure didn't specify. */
54 #define TARGET_CPU_generic 0x8000
56 typedef enum arm_cond_code
58 ARM_EQ = 0, ARM_NE, ARM_CS, ARM_CC, ARM_MI, ARM_PL, ARM_VS, ARM_VC,
59 ARM_HI, ARM_LS, ARM_GE, ARM_LT, ARM_GT, ARM_LE, ARM_AL, ARM_NV
63 extern arm_cc arm_current_cc;
64 extern const char * arm_condition_codes[];
66 #define ARM_INVERSE_CONDITION_CODE(X) ((arm_cc) (((int)X) ^ 1))
68 extern int arm_target_label;
69 extern int arm_ccfsm_state;
70 extern struct rtx_def * arm_target_insn;
71 /* Run-time compilation parameters selecting different hardware subsets. */
72 extern int target_flags;
73 /* The floating point instruction architecture, can be 2 or 3 */
74 extern const char * target_fp_name;
75 /* Define the information needed to generate branch insns. This is
76 stored from the compare operation. Note that we can't use "rtx" here
77 since it hasn't been defined! */
78 extern struct rtx_def * arm_compare_op0;
79 extern struct rtx_def * arm_compare_op1;
80 /* The label of the current constant pool. */
81 extern struct rtx_def * pool_vector_label;
82 /* Set to 1 when a return insn is output, this means that the epilogue
84 extern int return_used_this_function;
85 /* Nonzero if the prologue must setup `fp'. */
86 extern int current_function_anonymous_args;
88 /* Just in case configure has failed to define anything. */
89 #ifndef TARGET_CPU_DEFAULT
90 #define TARGET_CPU_DEFAULT TARGET_CPU_generic
93 /* If the configuration file doesn't specify the cpu, the subtarget may
94 override it. If it doesn't, then default to an ARM6. */
95 #if TARGET_CPU_DEFAULT == TARGET_CPU_generic
96 #undef TARGET_CPU_DEFAULT
98 #ifdef SUBTARGET_CPU_DEFAULT
99 #define TARGET_CPU_DEFAULT SUBTARGET_CPU_DEFAULT
101 #define TARGET_CPU_DEFAULT TARGET_CPU_arm6
105 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm2
106 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_2__"
108 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm6 || TARGET_CPU_DEFAULT == TARGET_CPU_arm610 || TARGET_CPU_DEFAULT == TARGET_CPU_arm7500fe
109 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_3__"
111 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm7m
112 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_3M__"
114 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm7tdmi || TARGET_CPU_DEFAULT == TARGET_CPU_arm9 || TARGET_CPU_DEFAULT == TARGET_CPU_arm9tdmi
115 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4T__"
117 #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
118 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4__"
120 #if TARGET_CPU_DEFAULT == TARGET_CPU_xscale
121 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_5TE__ -D__XSCALE__"
123 Unrecognized value in TARGET_CPU_DEFAULT.
131 #ifndef CPP_PREDEFINES
132 #define CPP_PREDEFINES "-Acpu=arm -Amachine=arm"
136 %(cpp_cpu_arch) %(cpp_apcs_pc) %(cpp_float) \
137 %(cpp_endian) %(subtarget_cpp_spec) %(cpp_isa) %(cpp_interwork)"
139 #define CPP_ISA_SPEC "%{mthumb:-D__thumb__} %{!mthumb:-D__arm__}"
141 /* Set the architecture define -- if -march= is set, then it overrides
142 the -mcpu= setting. */
143 #define CPP_CPU_ARCH_SPEC "\
144 %{march=arm2:-D__ARM_ARCH_2__} \
145 %{march=arm250:-D__ARM_ARCH_2__} \
146 %{march=arm3:-D__ARM_ARCH_2__} \
147 %{march=arm6:-D__ARM_ARCH_3__} \
148 %{march=arm600:-D__ARM_ARCH_3__} \
149 %{march=arm610:-D__ARM_ARCH_3__} \
150 %{march=arm7:-D__ARM_ARCH_3__} \
151 %{march=arm700:-D__ARM_ARCH_3__} \
152 %{march=arm710:-D__ARM_ARCH_3__} \
153 %{march=arm720:-D__ARM_ARCH_3__} \
154 %{march=arm7100:-D__ARM_ARCH_3__} \
155 %{march=arm7500:-D__ARM_ARCH_3__} \
156 %{march=arm7500fe:-D__ARM_ARCH_3__} \
157 %{march=arm7m:-D__ARM_ARCH_3M__} \
158 %{march=arm7dm:-D__ARM_ARCH_3M__} \
159 %{march=arm7dmi:-D__ARM_ARCH_3M__} \
160 %{march=arm7tdmi:-D__ARM_ARCH_4T__} \
161 %{march=arm8:-D__ARM_ARCH_4__} \
162 %{march=arm810:-D__ARM_ARCH_4__} \
163 %{march=arm9:-D__ARM_ARCH_4T__} \
164 %{march=arm920:-D__ARM_ARCH_4__} \
165 %{march=arm920t:-D__ARM_ARCH_4T__} \
166 %{march=arm9tdmi:-D__ARM_ARCH_4T__} \
167 %{march=strongarm:-D__ARM_ARCH_4__} \
168 %{march=strongarm110:-D__ARM_ARCH_4__} \
169 %{march=strongarm1100:-D__ARM_ARCH_4__} \
170 %{march=xscale:-D__ARM_ARCH_5TE__} \
171 %{march=xscale:-D__XSCALE__} \
172 %{march=armv2:-D__ARM_ARCH_2__} \
173 %{march=armv2a:-D__ARM_ARCH_2__} \
174 %{march=armv3:-D__ARM_ARCH_3__} \
175 %{march=armv3m:-D__ARM_ARCH_3M__} \
176 %{march=armv4:-D__ARM_ARCH_4__} \
177 %{march=armv4t:-D__ARM_ARCH_4T__} \
178 %{march=armv5:-D__ARM_ARCH_5__} \
179 %{march=armv5t:-D__ARM_ARCH_5T__} \
180 %{march=armv5e:-D__ARM_ARCH_5E__} \
181 %{march=armv5te:-D__ARM_ARCH_5TE__} \
183 %{mcpu=arm2:-D__ARM_ARCH_2__} \
184 %{mcpu=arm250:-D__ARM_ARCH_2__} \
185 %{mcpu=arm3:-D__ARM_ARCH_2__} \
186 %{mcpu=arm6:-D__ARM_ARCH_3__} \
187 %{mcpu=arm600:-D__ARM_ARCH_3__} \
188 %{mcpu=arm610:-D__ARM_ARCH_3__} \
189 %{mcpu=arm7:-D__ARM_ARCH_3__} \
190 %{mcpu=arm700:-D__ARM_ARCH_3__} \
191 %{mcpu=arm710:-D__ARM_ARCH_3__} \
192 %{mcpu=arm720:-D__ARM_ARCH_3__} \
193 %{mcpu=arm7100:-D__ARM_ARCH_3__} \
194 %{mcpu=arm7500:-D__ARM_ARCH_3__} \
195 %{mcpu=arm7500fe:-D__ARM_ARCH_3__} \
196 %{mcpu=arm7m:-D__ARM_ARCH_3M__} \
197 %{mcpu=arm7dm:-D__ARM_ARCH_3M__} \
198 %{mcpu=arm7dmi:-D__ARM_ARCH_3M__} \
199 %{mcpu=arm7tdmi:-D__ARM_ARCH_4T__} \
200 %{mcpu=arm8:-D__ARM_ARCH_4__} \
201 %{mcpu=arm810:-D__ARM_ARCH_4__} \
202 %{mcpu=arm9:-D__ARM_ARCH_4T__} \
203 %{mcpu=arm920:-D__ARM_ARCH_4__} \
204 %{mcpu=arm920t:-D__ARM_ARCH_4T__} \
205 %{mcpu=arm9tdmi:-D__ARM_ARCH_4T__} \
206 %{mcpu=strongarm:-D__ARM_ARCH_4__} \
207 %{mcpu=strongarm110:-D__ARM_ARCH_4__} \
208 %{mcpu=strongarm1100:-D__ARM_ARCH_4__} \
209 %{mcpu=xscale:-D__ARM_ARCH_5TE__} \
210 %{mcpu=xscale:-D__XSCALE__} \
211 %{!mcpu*:%(cpp_cpu_arch_default)}} \
214 /* Define __APCS_26__ if the PC also contains the PSR */
215 #define CPP_APCS_PC_SPEC "\
216 %{mapcs-32:%{mapcs-26:%e-mapcs-26 and -mapcs-32 may not be used together} \
218 %{mapcs-26:-D__APCS_26__} \
219 %{!mapcs-32: %{!mapcs-26:%(cpp_apcs_pc_default)}} \
222 #ifndef CPP_APCS_PC_DEFAULT_SPEC
223 #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_26__"
226 #define CPP_FLOAT_SPEC "\
228 %{mhard-float:%e-msoft-float and -mhard_float may not be used together} \
230 %{!mhard-float:%{!msoft-float:%(cpp_float_default)}} \
233 /* Default is hard float, which doesn't define anything */
234 #define CPP_FLOAT_DEFAULT_SPEC ""
236 #define CPP_ENDIAN_SPEC "\
239 %e-mbig-endian and -mlittle-endian may not be used together} \
240 -D__ARMEB__ %{mwords-little-endian:-D__ARMWEL__} %{mthumb:-D__THUMBEB__}}\
241 %{mlittle-endian:-D__ARMEL__ %{mthumb:-D__THUMBEL__}} \
242 %{!mlittle-endian:%{!mbig-endian:%(cpp_endian_default)}} \
245 /* Default is little endian. */
246 #define CPP_ENDIAN_DEFAULT_SPEC "-D__ARMEL__ %{mthumb:-D__THUMBEL__}"
248 /* Add a define for interworking. Needed when building libgcc.a.
249 This must define __THUMB_INTERWORK__ to the pre-processor if
250 interworking is enabled by default. */
251 #ifndef CPP_INTERWORK_DEFAULT_SPEC
252 #define CPP_INTERWORK_DEFAULT_SPEC ""
255 #define CPP_INTERWORK_SPEC " \
256 %{mthumb-interwork: \
257 %{mno-thumb-interwork: %eIncompatible interworking options} \
258 -D__THUMB_INTERWORK__} \
259 %{!mthumb-interwork:%{!mno-thumb-interwork:%(cpp_interwork_default)}} \
264 /* This macro defines names of additional specifications to put in the specs
265 that can be used in various specifications like CC1_SPEC. Its definition
266 is an initializer with a subgrouping for each command option.
268 Each subgrouping contains a string constant, that defines the
269 specification name, and a string constant that used by the GNU CC driver
272 Do not define this macro if it does not need to do anything. */
273 #define EXTRA_SPECS \
274 { "cpp_cpu_arch", CPP_CPU_ARCH_SPEC }, \
275 { "cpp_cpu_arch_default", CPP_ARCH_DEFAULT_SPEC }, \
276 { "cpp_apcs_pc", CPP_APCS_PC_SPEC }, \
277 { "cpp_apcs_pc_default", CPP_APCS_PC_DEFAULT_SPEC }, \
278 { "cpp_float", CPP_FLOAT_SPEC }, \
279 { "cpp_float_default", CPP_FLOAT_DEFAULT_SPEC }, \
280 { "cpp_endian", CPP_ENDIAN_SPEC }, \
281 { "cpp_endian_default", CPP_ENDIAN_DEFAULT_SPEC }, \
282 { "cpp_isa", CPP_ISA_SPEC }, \
283 { "cpp_interwork", CPP_INTERWORK_SPEC }, \
284 { "cpp_interwork_default", CPP_INTERWORK_DEFAULT_SPEC }, \
285 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \
286 SUBTARGET_EXTRA_SPECS
288 #ifndef SUBTARGET_EXTRA_SPECS
289 #define SUBTARGET_EXTRA_SPECS
292 #ifndef SUBTARGET_CPP_SPEC
293 #define SUBTARGET_CPP_SPEC ""
296 /* Run-time Target Specification. */
297 #ifndef TARGET_VERSION
298 #define TARGET_VERSION fputs (" (ARM/generic)", stderr);
301 /* Nonzero if the function prologue (and epilogue) should obey
302 the ARM Procedure Call Standard. */
303 #define ARM_FLAG_APCS_FRAME (1 << 0)
305 /* Nonzero if the function prologue should output the function name to enable
306 the post mortem debugger to print a backtrace (very useful on RISCOS,
307 unused on RISCiX). Specifying this flag also enables
308 -fno-omit-frame-pointer.
309 XXX Must still be implemented in the prologue. */
310 #define ARM_FLAG_POKE (1 << 1)
312 /* Nonzero if floating point instructions are emulated by the FPE, in which
313 case instruction scheduling becomes very uninteresting. */
314 #define ARM_FLAG_FPE (1 << 2)
316 /* Nonzero if destined for a processor in 32-bit program mode. Takes out bit
317 that assume restoration of the condition flags when returning from a
318 branch and link (ie a function). */
319 #define ARM_FLAG_APCS_32 (1 << 3)
321 /* FLAGS 0x0008 and 0x0010 are now spare (used to be arm3/6 selection). */
323 /* Nonzero if stack checking should be performed on entry to each function
324 which allocates temporary variables on the stack. */
325 #define ARM_FLAG_APCS_STACK (1 << 4)
327 /* Nonzero if floating point parameters should be passed to functions in
328 floating point registers. */
329 #define ARM_FLAG_APCS_FLOAT (1 << 5)
331 /* Nonzero if re-entrant, position independent code should be generated.
332 This is equivalent to -fpic. */
333 #define ARM_FLAG_APCS_REENT (1 << 6)
335 /* Nonzero if the MMU will trap unaligned word accesses, so shorts must
336 be loaded using either LDRH or LDRB instructions. */
337 #define ARM_FLAG_MMU_TRAPS (1 << 7)
339 /* Nonzero if all floating point instructions are missing (and there is no
340 emulator either). Generate function calls for all ops in this case. */
341 #define ARM_FLAG_SOFT_FLOAT (1 << 8)
343 /* Nonzero if we should compile with BYTES_BIG_ENDIAN set to 1. */
344 #define ARM_FLAG_BIG_END (1 << 9)
346 /* Nonzero if we should compile for Thumb interworking. */
347 #define ARM_FLAG_INTERWORK (1 << 10)
349 /* Nonzero if we should have little-endian words even when compiling for
350 big-endian (for backwards compatibility with older versions of GCC). */
351 #define ARM_FLAG_LITTLE_WORDS (1 << 11)
353 /* Nonzero if we need to protect the prolog from scheduling */
354 #define ARM_FLAG_NO_SCHED_PRO (1 << 12)
356 /* Nonzero if a call to abort should be generated if a noreturn
357 function tries to return. */
358 #define ARM_FLAG_ABORT_NORETURN (1 << 13)
360 /* Nonzero if function prologues should not load the PIC register. */
361 #define ARM_FLAG_SINGLE_PIC_BASE (1 << 14)
363 /* Nonzero if all call instructions should be indirect. */
364 #define ARM_FLAG_LONG_CALLS (1 << 15)
366 /* Nonzero means that the target ISA is the THUMB, not the ARM. */
367 #define ARM_FLAG_THUMB (1 << 16)
369 /* Set if a TPCS style stack frame should be generated, for non-leaf
370 functions, even if they do not need one. */
371 #define THUMB_FLAG_BACKTRACE (1 << 17)
373 /* Set if a TPCS style stack frame should be generated, for leaf
374 functions, even if they do not need one. */
375 #define THUMB_FLAG_LEAF_BACKTRACE (1 << 18)
377 /* Set if externally visible functions should assume that they
378 might be called in ARM mode, from a non-thumb aware code. */
379 #define THUMB_FLAG_CALLEE_SUPER_INTERWORKING (1 << 19)
381 /* Set if calls via function pointers should assume that their
382 destination is non-Thumb aware. */
383 #define THUMB_FLAG_CALLER_SUPER_INTERWORKING (1 << 20)
385 #define TARGET_APCS_FRAME (target_flags & ARM_FLAG_APCS_FRAME)
386 #define TARGET_POKE_FUNCTION_NAME (target_flags & ARM_FLAG_POKE)
387 #define TARGET_FPE (target_flags & ARM_FLAG_FPE)
388 #define TARGET_APCS_32 (target_flags & ARM_FLAG_APCS_32)
389 #define TARGET_APCS_STACK (target_flags & ARM_FLAG_APCS_STACK)
390 #define TARGET_APCS_FLOAT (target_flags & ARM_FLAG_APCS_FLOAT)
391 #define TARGET_APCS_REENT (target_flags & ARM_FLAG_APCS_REENT)
392 #define TARGET_MMU_TRAPS (target_flags & ARM_FLAG_MMU_TRAPS)
393 #define TARGET_SOFT_FLOAT (target_flags & ARM_FLAG_SOFT_FLOAT)
394 #define TARGET_HARD_FLOAT (! TARGET_SOFT_FLOAT)
395 #define TARGET_BIG_END (target_flags & ARM_FLAG_BIG_END)
396 #define TARGET_INTERWORK (target_flags & ARM_FLAG_INTERWORK)
397 #define TARGET_LITTLE_WORDS (target_flags & ARM_FLAG_LITTLE_WORDS)
398 #define TARGET_NO_SCHED_PRO (target_flags & ARM_FLAG_NO_SCHED_PRO)
399 #define TARGET_ABORT_NORETURN (target_flags & ARM_FLAG_ABORT_NORETURN)
400 #define TARGET_SINGLE_PIC_BASE (target_flags & ARM_FLAG_SINGLE_PIC_BASE)
401 #define TARGET_LONG_CALLS (target_flags & ARM_FLAG_LONG_CALLS)
402 #define TARGET_THUMB (target_flags & ARM_FLAG_THUMB)
403 #define TARGET_ARM (! TARGET_THUMB)
404 #define TARGET_EITHER 1 /* (TARGET_ARM | TARGET_THUMB) */
405 #define TARGET_CALLEE_INTERWORKING (target_flags & THUMB_FLAG_CALLEE_SUPER_INTERWORKING)
406 #define TARGET_CALLER_INTERWORKING (target_flags & THUMB_FLAG_CALLER_SUPER_INTERWORKING)
407 #define TARGET_BACKTRACE (leaf_function_p () \
408 ? (target_flags & THUMB_FLAG_LEAF_BACKTRACE) \
409 : (target_flags & THUMB_FLAG_BACKTRACE))
411 /* SUBTARGET_SWITCHES is used to add flags on a per-config basis.
412 Bit 31 is reserved. See riscix.h. */
413 #ifndef SUBTARGET_SWITCHES
414 #define SUBTARGET_SWITCHES
417 #define TARGET_SWITCHES \
419 {"apcs", ARM_FLAG_APCS_FRAME, "" }, \
420 {"apcs-frame", ARM_FLAG_APCS_FRAME, \
421 N_("Generate APCS conformant stack frames") }, \
422 {"no-apcs-frame", -ARM_FLAG_APCS_FRAME, "" }, \
423 {"poke-function-name", ARM_FLAG_POKE, \
424 N_("Store function names in object code") }, \
425 {"no-poke-function-name", -ARM_FLAG_POKE, "" }, \
426 {"fpe", ARM_FLAG_FPE, "" }, \
427 {"apcs-32", ARM_FLAG_APCS_32, \
428 N_("Use the 32bit version of the APCS") }, \
429 {"apcs-26", -ARM_FLAG_APCS_32, \
430 N_("Use the 26bit version of the APCS") }, \
431 {"apcs-stack-check", ARM_FLAG_APCS_STACK, "" }, \
432 {"no-apcs-stack-check", -ARM_FLAG_APCS_STACK, "" }, \
433 {"apcs-float", ARM_FLAG_APCS_FLOAT, \
434 N_("Pass FP arguments in FP registers") }, \
435 {"no-apcs-float", -ARM_FLAG_APCS_FLOAT, "" }, \
436 {"apcs-reentrant", ARM_FLAG_APCS_REENT, \
437 N_("Generate re-entrant, PIC code") }, \
438 {"no-apcs-reentrant", -ARM_FLAG_APCS_REENT, "" }, \
439 {"alignment-traps", ARM_FLAG_MMU_TRAPS, \
440 N_("The MMU will trap on unaligned accesses") }, \
441 {"no-alignment-traps", -ARM_FLAG_MMU_TRAPS, "" }, \
442 {"short-load-bytes", ARM_FLAG_MMU_TRAPS, "" }, \
443 {"no-short-load-bytes", -ARM_FLAG_MMU_TRAPS, "" }, \
444 {"short-load-words", -ARM_FLAG_MMU_TRAPS, "" }, \
445 {"no-short-load-words", ARM_FLAG_MMU_TRAPS, "" }, \
446 {"soft-float", ARM_FLAG_SOFT_FLOAT, \
447 N_("Use library calls to perform FP operations") }, \
448 {"hard-float", -ARM_FLAG_SOFT_FLOAT, \
449 N_("Use hardware floating point instructions") }, \
450 {"big-endian", ARM_FLAG_BIG_END, \
451 N_("Assume target CPU is configured as big endian") }, \
452 {"little-endian", -ARM_FLAG_BIG_END, \
453 N_("Assume target CPU is configured as little endian") }, \
454 {"words-little-endian", ARM_FLAG_LITTLE_WORDS, \
455 N_("Assume big endian bytes, little endian words") }, \
456 {"thumb-interwork", ARM_FLAG_INTERWORK, \
457 N_("Support calls between THUMB and ARM instructions sets") }, \
458 {"no-thumb-interwork", -ARM_FLAG_INTERWORK, "" }, \
459 {"abort-on-noreturn", ARM_FLAG_ABORT_NORETURN, \
460 N_("Generate a call to abort if a noreturn function returns")}, \
461 {"no-abort-on-noreturn", -ARM_FLAG_ABORT_NORETURN, "" }, \
462 {"sched-prolog", -ARM_FLAG_NO_SCHED_PRO, \
463 N_("Do not move instructions into a function's prologue") }, \
464 {"no-sched-prolog", ARM_FLAG_NO_SCHED_PRO, "" }, \
465 {"single-pic-base", ARM_FLAG_SINGLE_PIC_BASE, \
466 N_("Do not load the PIC register in function prologues") }, \
467 {"no-single-pic-base", -ARM_FLAG_SINGLE_PIC_BASE, "" }, \
468 {"long-calls", ARM_FLAG_LONG_CALLS, \
469 N_("Generate call insns as indirect calls, if necessary") }, \
470 {"no-long-calls", -ARM_FLAG_LONG_CALLS, "" }, \
471 {"thumb", ARM_FLAG_THUMB, \
472 N_("Compile for the Thumb not the ARM") }, \
473 {"no-thumb", -ARM_FLAG_THUMB, "" }, \
474 {"arm", -ARM_FLAG_THUMB, "" }, \
475 {"tpcs-frame", THUMB_FLAG_BACKTRACE, \
476 N_("Thumb: Generate (non-leaf) stack frames even if not needed") }, \
477 {"no-tpcs-frame", -THUMB_FLAG_BACKTRACE, "" }, \
478 {"tpcs-leaf-frame", THUMB_FLAG_LEAF_BACKTRACE, \
479 N_("Thumb: Generate (leaf) stack frames even if not needed") }, \
480 {"no-tpcs-leaf-frame", -THUMB_FLAG_LEAF_BACKTRACE, "" }, \
481 {"callee-super-interworking", THUMB_FLAG_CALLEE_SUPER_INTERWORKING, \
482 N_("Thumb: Assume non-static functions may be called from ARM code") }, \
483 {"no-callee-super-interworking", -THUMB_FLAG_CALLEE_SUPER_INTERWORKING, \
485 {"caller-super-interworking", THUMB_FLAG_CALLER_SUPER_INTERWORKING, \
486 N_("Thumb: Assume function pointers may go to non-Thumb aware code") }, \
487 {"no-caller-super-interworking", -THUMB_FLAG_CALLER_SUPER_INTERWORKING, \
490 {"", TARGET_DEFAULT, "" } \
493 #define TARGET_OPTIONS \
495 {"cpu=", & arm_select[0].string, \
496 N_("Specify the name of the target CPU") }, \
497 {"arch=", & arm_select[1].string, \
498 N_("Specify the name of the target architecture") }, \
499 {"tune=", & arm_select[2].string, "" }, \
500 {"fpe=", & target_fp_name, "" }, \
501 {"fp=", & target_fp_name, \
502 N_("Specify the version of the floating point emulator") }, \
503 {"structure-size-boundary=", & structure_size_string, \
504 N_("Specify the minimum bit alignment of structures") }, \
505 {"pic-register=", & arm_pic_register_string, \
506 N_("Specify the register to be used for PIC addressing") } \
509 struct arm_cpu_select
513 const struct processors * processors;
516 /* This is a magic array. If the user specifies a command line switch
517 which matches one of the entries in TARGET_OPTIONS then the corresponding
518 string pointer will be set to the value specified by the user. */
519 extern struct arm_cpu_select arm_select[];
527 /* Recast the program mode class to be the prog_mode attribute */
528 #define arm_prog_mode ((enum attr_prog_mode) arm_prgmode)
530 extern enum prog_mode_type arm_prgmode;
532 /* What sort of floating point unit do we have? Hardware or software.
533 If software, is it issue 2 or issue 3? */
534 enum floating_point_type
541 /* Recast the floating point class to be the floating point attribute. */
542 #define arm_fpu_attr ((enum attr_fpu) arm_fpu)
544 /* What type of floating point to tune for */
545 extern enum floating_point_type arm_fpu;
547 /* What type of floating point instructions are available */
548 extern enum floating_point_type arm_fpu_arch;
550 /* Default floating point architecture. Override in sub-target if
552 #define FP_DEFAULT FP_SOFT2
554 /* Nonzero if the processor has a fast multiply insn, and one that does
555 a 64-bit multiply of two 32-bit values. */
556 extern int arm_fast_multiply;
558 /* Nonzero if this chip supports the ARM Architecture 4 extensions */
559 extern int arm_arch4;
561 /* Nonzero if this chip supports the ARM Architecture 5 extensions */
562 extern int arm_arch5;
564 /* Nonzero if this chip can benefit from load scheduling. */
565 extern int arm_ld_sched;
567 /* Nonzero if generating thumb code. */
568 extern int thumb_code;
570 /* Nonzero if this chip is a StrongARM. */
571 extern int arm_is_strong;
573 /* Nonzero if this chip is an XScale. */
574 extern int arm_is_xscale;
576 /* Nonzero if this chip is a an ARM6 or an ARM7. */
577 extern int arm_is_6_or_7;
579 #ifndef TARGET_DEFAULT
580 #define TARGET_DEFAULT (ARM_FLAG_APCS_FRAME)
583 /* The frame pointer register used in gcc has nothing to do with debugging;
584 that is controlled by the APCS-FRAME option. */
585 #define CAN_DEBUG_WITHOUT_FP
587 #define TARGET_MEM_FUNCTIONS 1
589 #define OVERRIDE_OPTIONS arm_override_options ()
591 /* Nonzero if PIC code requires explicit qualifiers to generate
592 PLT and GOT relocs rather than the assembler doing so implicitly.
593 Subtargets can override these if required. */
594 #ifndef NEED_GOT_RELOC
595 #define NEED_GOT_RELOC 0
597 #ifndef NEED_PLT_RELOC
598 #define NEED_PLT_RELOC 0
601 /* Nonzero if we need to refer to the GOT with a PC-relative
602 offset. In other words, generate
604 .word _GLOBAL_OFFSET_TABLE_ - [. - (.Lxx + 8)]
608 .word _GLOBAL_OFFSET_TABLE_ - (.Lxx + 8)
610 The default is true, which matches NetBSD. Subtargets can
611 override this if required. */
616 /* Target machine storage Layout. */
619 /* Define this macro if it is advisable to hold scalars in registers
620 in a wider mode than that declared by the program. In such cases,
621 the value is constrained to be within the bounds of the declared
622 type, but kept valid in the wider mode. The signedness of the
623 extension may differ from that of the type. */
625 /* It is far faster to zero extend chars than to sign extend them */
627 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
628 if (GET_MODE_CLASS (MODE) == MODE_INT \
629 && GET_MODE_SIZE (MODE) < 4) \
631 if (MODE == QImode) \
633 else if (MODE == HImode) \
634 UNSIGNEDP = TARGET_MMU_TRAPS != 0; \
638 /* Define this macro if the promotion described by `PROMOTE_MODE'
639 should also be done for outgoing function arguments. */
640 /* This is required to ensure that push insns always push a word. */
641 #define PROMOTE_FUNCTION_ARGS
643 /* Define for XFmode extended real floating point support.
644 This will automatically cause REAL_ARITHMETIC to be defined. */
646 I think I have added all the code to make this work. Unfortunately,
647 early releases of the floating point emulation code on RISCiX used a
648 different format for extended precision numbers. On my RISCiX box there
649 is a bug somewhere which causes the machine to lock up when running enquire
650 with long doubles. There is the additional aspect that Norcroft C
651 treats long doubles as doubles and we ought to remain compatible.
652 Perhaps someone with an FPA coprocessor and not running RISCiX would like
653 to try this someday. */
654 /* #define LONG_DOUBLE_TYPE_SIZE 96 */
656 /* Disable XFmode patterns in md file */
657 #define ENABLE_XF_PATTERNS 0
659 /* Define if you don't want extended real, but do want to use the
660 software floating point emulator for REAL_ARITHMETIC and
661 decimal <-> binary conversion. */
662 /* See comment above */
663 #define REAL_ARITHMETIC
665 /* Define this if most significant bit is lowest numbered
666 in instructions that operate on numbered bit-fields. */
667 #define BITS_BIG_ENDIAN 0
669 /* Define this if most significant byte of a word is the lowest numbered.
670 Most ARM processors are run in little endian mode, so that is the default.
671 If you want to have it run-time selectable, change the definition in a
672 cover file to be TARGET_BIG_ENDIAN. */
673 #define BYTES_BIG_ENDIAN (TARGET_BIG_END != 0)
675 /* Define this if most significant word of a multiword number is the lowest
677 This is always false, even when in big-endian mode. */
678 #define WORDS_BIG_ENDIAN (BYTES_BIG_ENDIAN && ! TARGET_LITTLE_WORDS)
680 /* LIBGCC2_WORDS_BIG_ENDIAN has to be a constant, so we define this based
681 on processor pre-defineds when compiling libgcc2.c. */
682 #if defined(__ARMEB__) && !defined(__ARMWEL__)
683 #define LIBGCC2_WORDS_BIG_ENDIAN 1
685 #define LIBGCC2_WORDS_BIG_ENDIAN 0
688 /* Define this if most significant word of doubles is the lowest numbered.
689 This is always true, even when in little-endian mode. */
690 #define FLOAT_WORDS_BIG_ENDIAN 1
692 /* Number of bits in an addressable storage unit */
693 #define BITS_PER_UNIT 8
695 #define BITS_PER_WORD 32
697 #define UNITS_PER_WORD 4
699 #define POINTER_SIZE 32
701 #define PARM_BOUNDARY 32
703 #define STACK_BOUNDARY 32
705 #define FUNCTION_BOUNDARY 32
707 #define EMPTY_FIELD_BOUNDARY 32
709 #define BIGGEST_ALIGNMENT 32
711 /* Make strings word-aligned so strcpy from constants will be faster. */
712 #define CONSTANT_ALIGNMENT_FACTOR (TARGET_THUMB || ! arm_is_xscale ? 1 : 2)
714 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
715 ((TREE_CODE (EXP) == STRING_CST \
716 && (ALIGN) < BITS_PER_WORD * CONSTANT_ALIGNMENT_FACTOR) \
717 ? BITS_PER_WORD * CONSTANT_ALIGNMENT_FACTOR : (ALIGN))
719 /* Setting STRUCTURE_SIZE_BOUNDARY to 32 produces more efficient code, but the
720 value set in previous versions of this toolchain was 8, which produces more
721 compact structures. The command line option -mstructure_size_boundary=<n>
722 can be used to change this value. For compatability with the ARM SDK
723 however the value should be left at 32. ARM SDT Reference Manual (ARM DUI
724 0020D) page 2-20 says "Structures are aligned on word boundaries". */
725 #define STRUCTURE_SIZE_BOUNDARY arm_structure_size_boundary
726 extern int arm_structure_size_boundary;
728 /* This is the value used to initialise arm_structure_size_boundary. If a
729 particular arm target wants to change the default value it should change
730 the definition of this macro, not STRUCTRUE_SIZE_BOUNDARY. See netbsd.h
731 for an example of this. */
732 #ifndef DEFAULT_STRUCTURE_SIZE_BOUNDARY
733 #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 32
736 /* Used when parsing command line option -mstructure_size_boundary. */
737 extern const char * structure_size_string;
739 /* Non-zero if move instructions will actually fail to work
740 when given unaligned data. */
741 #define STRICT_ALIGNMENT 1
743 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
746 /* Standard register usage. */
748 /* Register allocation in ARM Procedure Call Standard (as used on RISCiX):
749 (S - saved over call).
751 r0 * argument word/integer result
754 r4-r8 S register variable
755 r9 S (rfp) register variable (real frame pointer)
757 r10 F S (sl) stack limit (used by -mapcs-stack-check)
758 r11 F S (fp) argument pointer
759 r12 (ip) temp workspace
760 r13 F S (sp) lower end of current stack frame
761 r14 (lr) link address/workspace
762 r15 F (pc) program counter
764 f0 floating point result
765 f1-f3 floating point scratch
767 f4-f7 S floating point variable
769 cc This is NOT a real register, but is used internally
770 to represent things that use or set the condition
772 sfp This isn't either. It is used during rtl generation
773 since the offset between the frame pointer and the
774 auto's isn't known until after register allocation.
775 afp Nor this, we only need this because of non-local
776 goto. Without it fp appears to be used and the
777 elimination code won't get rid of sfp. It tracks
778 fp exactly at all times.
780 *: See CONDITIONAL_REGISTER_USAGE */
782 /* The stack backtrace structure is as follows:
783 fp points to here: | save code pointer | [fp]
784 | return link value | [fp, #-4]
785 | return sp value | [fp, #-8]
786 | return fp value | [fp, #-12]
787 [| saved r10 value |]
798 [| saved f7 value |] three words
799 [| saved f6 value |] three words
800 [| saved f5 value |] three words
801 [| saved f4 value |] three words
802 r0-r3 are not normally saved in a C function. */
804 /* 1 for registers that have pervasive standard uses
805 and are not available for the register allocator. */
806 #define FIXED_REGISTERS \
814 /* 1 for registers not available across function calls.
815 These must include the FIXED_REGISTERS and also any
816 registers that can be used without being saved.
817 The latter must include the registers where values are returned
818 and the register where structure-value addresses are passed.
819 Aside from that, you can include as many other registers as you like.
820 The CC is not preserved over function calls on the ARM 6, so it is
821 easier to assume this for all. SFP is preserved, since FP is. */
822 #define CALL_USED_REGISTERS \
830 #ifndef SUBTARGET_CONDITIONAL_REGISTER_USAGE
831 #define SUBTARGET_CONDITIONAL_REGISTER_USAGE
834 #define CONDITIONAL_REGISTER_USAGE \
836 if (TARGET_SOFT_FLOAT || TARGET_THUMB) \
839 for (regno = FIRST_ARM_FP_REGNUM; \
840 regno <= LAST_ARM_FP_REGNUM; ++regno) \
841 fixed_regs[regno] = call_used_regs[regno] = 1; \
845 fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
846 call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
848 else if (TARGET_APCS_STACK) \
850 fixed_regs[10] = 1; \
851 call_used_regs[10] = 1; \
853 if (TARGET_APCS_FRAME) \
855 fixed_regs[ARM_HARD_FRAME_POINTER_REGNUM] = 1; \
856 call_used_regs[ARM_HARD_FRAME_POINTER_REGNUM] = 1; \
858 SUBTARGET_CONDITIONAL_REGISTER_USAGE \
861 /* These are a couple of extensions to the formats accecpted
863 %@ prints out ASM_COMMENT_START
864 %r prints out REGISTER_PREFIX reg_names[arg] */
865 #define ASM_FPRINTF_EXTENSIONS(FILE, ARGS, P) \
867 fputs (ASM_COMMENT_START, FILE); \
871 fputs (REGISTER_PREFIX, FILE); \
872 fputs (reg_names [va_arg (ARGS, int)], FILE); \
875 /* Round X up to the nearest word. */
876 #define ROUND_UP(X) (((X) + 3) & ~3)
878 /* Convert fron bytes to ints. */
879 #define NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
881 /* The number of (integer) registers required to hold a quantity of type MODE. */
882 #define NUM_REGS(MODE) \
883 NUM_INTS (GET_MODE_SIZE (MODE))
885 /* The number of (integer) registers required to hold a quantity of TYPE MODE. */
886 #define NUM_REGS2(MODE, TYPE) \
887 NUM_INTS ((MODE) == BLKmode ? \
888 int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE))
890 /* The number of (integer) argument register available. */
891 #define NUM_ARG_REGS 4
893 /* Return the regiser number of the N'th (integer) argument. */
894 #define ARG_REGISTER(N) (N - 1)
896 /* RTX for structure returns. NULL means use a hidden first argument. */
897 #define STRUCT_VALUE 0
899 /* Specify the registers used for certain standard purposes.
900 The values of these macros are register numbers. */
902 /* The number of the last argument register. */
903 #define LAST_ARG_REGNUM ARG_REGISTER (NUM_ARG_REGS)
905 /* The number of the last "lo" register (thumb). */
906 #define LAST_LO_REGNUM 7
908 /* The register that holds the return address in exception handlers. */
909 #define EXCEPTION_LR_REGNUM 2
911 /* The native (Norcroft) Pascal compiler for the ARM passes the static chain
912 as an invisible last argument (possible since varargs don't exist in
913 Pascal), so the following is not true. */
914 #define STATIC_CHAIN_REGNUM (TARGET_ARM ? 12 : 9)
916 /* Define this to be where the real frame pointer is if it is not possible to
917 work out the offset between the frame pointer and the automatic variables
918 until after register allocation has taken place. FRAME_POINTER_REGNUM
919 should point to a special register that we will make sure is eliminated.
921 For the Thumb we have another problem. The TPCS defines the frame pointer
922 as r11, and GCC belives that it is always possible to use the frame pointer
923 as base register for addressing purposes. (See comments in
924 find_reloads_address()). But - the Thumb does not allow high registers,
925 including r11, to be used as base address registers. Hence our problem.
927 The solution used here, and in the old thumb port is to use r7 instead of
928 r11 as the hard frame pointer and to have special code to generate
929 backtrace structures on the stack (if required to do so via a command line
930 option) using r11. This is the only 'user visable' use of r11 as a frame
932 #define ARM_HARD_FRAME_POINTER_REGNUM 11
933 #define THUMB_HARD_FRAME_POINTER_REGNUM 7
934 #define HARD_FRAME_POINTER_REGNUM (TARGET_ARM ? ARM_HARD_FRAME_POINTER_REGNUM : THUMB_HARD_FRAME_POINTER_REGNUM)
935 #define FP_REGNUM HARD_FRAME_POINTER_REGNUM
937 /* Scratch register - used in all kinds of places, eg trampolines. */
940 /* Register to use for pushing function arguments. */
941 #define STACK_POINTER_REGNUM 13
942 #define SP_REGNUM STACK_POINTER_REGNUM
944 /* Register which holds return address from a subroutine call. */
947 /* Define this if the program counter is overloaded on a register. */
950 /* The number of the last ARM (integer) register. */
951 #define LAST_ARM_REGNUM 15
953 /* ARM floating pointer registers. */
954 #define FIRST_ARM_FP_REGNUM 16
955 #define LAST_ARM_FP_REGNUM 23
957 /* Internal, so that we don't need to refer to a raw number */
960 /* Base register for access to local variables of the function. */
961 #define FRAME_POINTER_REGNUM 25
963 /* Base register for access to arguments of the function. */
964 #define ARG_POINTER_REGNUM 26
966 /* The number of hard registers is 16 ARM + 8 FPU + 1 CC + 1 SFP. */
967 #define FIRST_PSEUDO_REGISTER 27
969 /* Value should be nonzero if functions must have frame pointers.
970 Zero means the frame pointer need not be set up (and parms may be accessed
971 via the stack pointer) in functions that seem suitable.
972 If we have to have a frame pointer we might as well make use of it.
973 APCS says that the frame pointer does not need to be pushed in leaf
974 functions, or simple tail call functions. */
975 #define FRAME_POINTER_REQUIRED \
976 (current_function_has_nonlocal_label \
977 || (TARGET_ARM && TARGET_APCS_FRAME && ! leaf_function_p ()))
979 /* Return number of consecutive hard regs needed starting at reg REGNO
980 to hold something of mode MODE.
981 This is ordinarily the length in words of a value of mode MODE
982 but can be less for certain modes in special long registers.
984 On the ARM regs are UNITS_PER_WORD bits wide; FPU regs can hold any FP
986 #define HARD_REGNO_NREGS(REGNO, MODE) \
988 && REGNO >= FIRST_ARM_FP_REGNUM \
989 && REGNO != FRAME_POINTER_REGNUM \
990 && REGNO != ARG_POINTER_REGNUM) \
991 ? 1 : NUM_REGS (MODE))
993 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
994 This is TRUE for ARM regs since they can hold anything, and TRUE for FPU
996 For the Thumb we only allow values bigger than SImode in registers 0 - 6,
997 so that there is always a second lo register available to hold the upper
998 part of the value. Probably we ought to ensure that the register is the
999 start of an even numbered register pair. */
1000 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
1002 ((GET_MODE_CLASS (MODE) == MODE_CC) ? (REGNO == CC_REGNUM) : \
1003 ( REGNO <= LAST_ARM_REGNUM \
1004 || REGNO == FRAME_POINTER_REGNUM \
1005 || REGNO == ARG_POINTER_REGNUM \
1006 || GET_MODE_CLASS (MODE) == MODE_FLOAT)) \
1008 ((GET_MODE_CLASS (MODE) == MODE_CC) ? (REGNO == CC_REGNUM) : \
1009 (NUM_REGS (MODE) < 2 || REGNO < LAST_LO_REGNUM)))
1011 /* Value is 1 if it is a good idea to tie two pseudo registers
1012 when one has mode MODE1 and one has mode MODE2.
1013 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
1014 for any hard reg, then this must be 0 for correct output. */
1015 #define MODES_TIEABLE_P(MODE1, MODE2) \
1016 (GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2))
1018 /* The order in which register should be allocated. It is good to use ip
1019 since no saving is required (though calls clobber it) and it never contains
1020 function parameters. It is quite good to use lr since other calls may
1021 clobber it anyway. Allocate r0 through r3 in reverse order since r3 is
1022 least likely to contain a function parameter; in addition results are
1024 #define REG_ALLOC_ORDER \
1026 3, 2, 1, 0, 12, 14, 4, 5, \
1027 6, 7, 8, 10, 9, 11, 13, 15, \
1028 16, 17, 18, 19, 20, 21, 22, 23, \
1032 /* Register and constant classes. */
1034 /* Register classes: used to be simple, just all ARM regs or all FPU regs
1035 Now that the Thumb is involved it has become more compilcated. */
1050 #define N_REG_CLASSES (int) LIM_REG_CLASSES
1052 /* Give names of register classes as strings for dump file. */
1053 #define REG_CLASS_NAMES \
1066 /* Define which registers fit in which classes.
1067 This is an initializer for a vector of HARD_REG_SET
1068 of length N_REG_CLASSES. */
1069 #define REG_CLASS_CONTENTS \
1071 { 0x0000000 }, /* NO_REGS */ \
1072 { 0x0FF0000 }, /* FPU_REGS */ \
1073 { 0x00000FF }, /* LO_REGS */ \
1074 { 0x0002000 }, /* STACK_REG */ \
1075 { 0x00020FF }, /* BASE_REGS */ \
1076 { 0x000FF00 }, /* HI_REGS */ \
1077 { 0x1000000 }, /* CC_REG */ \
1078 { 0x200FFFF }, /* GENERAL_REGS */ \
1079 { 0x2FFFFFF } /* ALL_REGS */ \
1082 /* The same information, inverted:
1083 Return the class number of the smallest class containing
1084 reg number REGNO. This could be a conditional expression
1085 or could index an array. */
1086 #define REGNO_REG_CLASS(REGNO) arm_regno_class (REGNO)
1088 /* The class value for index registers, and the one for base regs. */
1089 #define INDEX_REG_CLASS (TARGET_THUMB ? LO_REGS : GENERAL_REGS)
1090 #define BASE_REG_CLASS (TARGET_THUMB ? BASE_REGS : GENERAL_REGS)
1092 /* When SMALL_REGISTER_CLASSES is nonzero, the compiler allows
1093 registers explicitly used in the rtl to be used as spill registers
1094 but prevents the compiler from extending the lifetime of these
1096 #define SMALL_REGISTER_CLASSES TARGET_THUMB
1098 /* Get reg_class from a letter such as appears in the machine description.
1099 We only need constraint `f' for FPU_REGS (`r' == GENERAL_REGS) for the
1100 ARM, but several more letters for the Thumb. */
1101 #define REG_CLASS_FROM_LETTER(C) \
1102 ( (C) == 'f' ? FPU_REGS \
1103 : (C) == 'l' ? (TARGET_ARM ? GENERAL_REGS : LO_REGS) \
1104 : TARGET_ARM ? NO_REGS \
1105 : (C) == 'h' ? HI_REGS \
1106 : (C) == 'b' ? BASE_REGS \
1107 : (C) == 'k' ? STACK_REG \
1108 : (C) == 'c' ? CC_REG \
1111 /* The letters I, J, K, L and M in a register constraint string
1112 can be used to stand for particular ranges of immediate operands.
1113 This macro defines what the ranges are.
1114 C is the letter, and VALUE is a constant value.
1115 Return 1 if VALUE is in the range specified by C.
1116 I: immediate arithmetic operand (i.e. 8 bits shifted as required).
1117 J: valid indexing constants.
1118 K: ~value ok in rhs argument of data operand.
1119 L: -value ok in rhs argument of data operand.
1120 M: 0..32, or a power of 2 (for shifts, or mult done by shift). */
1121 #define CONST_OK_FOR_ARM_LETTER(VALUE, C) \
1122 ((C) == 'I' ? const_ok_for_arm (VALUE) : \
1123 (C) == 'J' ? ((VALUE) < 4096 && (VALUE) > -4096) : \
1124 (C) == 'K' ? (const_ok_for_arm (~(VALUE))) : \
1125 (C) == 'L' ? (const_ok_for_arm (-(VALUE))) : \
1126 (C) == 'M' ? (((VALUE >= 0 && VALUE <= 32)) \
1127 || (((VALUE) & ((VALUE) - 1)) == 0)) \
1130 #define CONST_OK_FOR_THUMB_LETTER(VAL, C) \
1131 ((C) == 'I' ? (unsigned HOST_WIDE_INT) (VAL) < 256 : \
1132 (C) == 'J' ? (VAL) > -256 && (VAL) < 0 : \
1133 (C) == 'K' ? thumb_shiftable_const (VAL) : \
1134 (C) == 'L' ? (VAL) > -8 && (VAL) < 8 : \
1135 (C) == 'M' ? ((unsigned HOST_WIDE_INT) (VAL) < 1024 \
1136 && ((VAL) & 3) == 0) : \
1137 (C) == 'N' ? ((unsigned HOST_WIDE_INT) (VAL) < 32) : \
1138 (C) == 'O' ? ((VAL) >= -508 && (VAL) <= 508) \
1141 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1143 CONST_OK_FOR_ARM_LETTER (VALUE, C) : CONST_OK_FOR_THUMB_LETTER (VALUE, C))
1145 /* Constant letter 'G' for the FPU immediate constants.
1146 'H' means the same constant negated. */
1147 #define CONST_DOUBLE_OK_FOR_ARM_LETTER(X, C) \
1148 ((C) == 'G' ? const_double_rtx_ok_for_fpu (X) : \
1149 (C) == 'H' ? neg_const_double_rtx_ok_for_fpu (X) : 0)
1151 #define CONST_DOUBLE_OK_FOR_LETTER_P(X, C) \
1153 CONST_DOUBLE_OK_FOR_ARM_LETTER (X, C) : 0)
1155 /* For the ARM, `Q' means that this is a memory operand that is just
1156 an offset from a register.
1157 `S' means any symbol that has the SYMBOL_REF_FLAG set or a CONSTANT_POOL
1158 address. This means that the symbol is in the text segment and can be
1159 accessed without using a load. */
1161 #define EXTRA_CONSTRAINT_ARM(OP, C) \
1162 ((C) == 'Q' ? GET_CODE (OP) == MEM && GET_CODE (XEXP (OP, 0)) == REG : \
1163 (C) == 'R' ? (GET_CODE (OP) == MEM \
1164 && GET_CODE (XEXP (OP, 0)) == SYMBOL_REF \
1165 && CONSTANT_POOL_ADDRESS_P (XEXP (OP, 0))) : \
1166 (C) == 'S' ? (optimize > 0 && CONSTANT_ADDRESS_P (OP)) \
1169 #define EXTRA_CONSTRAINT_THUMB(X, C) \
1170 ((C) == 'Q' ? (GET_CODE (X) == MEM \
1171 && GET_CODE (XEXP (X, 0)) == LABEL_REF) : 0)
1173 #define EXTRA_CONSTRAINT(X, C) \
1175 EXTRA_CONSTRAINT_ARM (X, C) : EXTRA_CONSTRAINT_THUMB (X, C))
1177 /* Given an rtx X being reloaded into a reg required to be
1178 in class CLASS, return the class of reg to actually use.
1179 In general this is just CLASS, but for the Thumb we prefer
1180 a LO_REGS class or a subset. */
1181 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
1182 (TARGET_ARM ? (CLASS) : \
1183 ((CLASS) == BASE_REGS ? (CLASS) : LO_REGS))
1185 /* Must leave BASE_REGS reloads alone */
1186 #define THUMB_SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1187 ((CLASS) != LO_REGS && (CLASS) != BASE_REGS \
1188 ? ((true_regnum (X) == -1 ? LO_REGS \
1189 : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS \
1193 #define THUMB_SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1194 ((CLASS) != LO_REGS \
1195 ? ((true_regnum (X) == -1 ? LO_REGS \
1196 : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS \
1200 /* Return the register class of a scratch register needed to copy IN into
1201 or out of a register in CLASS in MODE. If it can be done directly,
1202 NO_REGS is returned. */
1203 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1205 (((MODE) == HImode && ! arm_arch4 && true_regnum (X) == -1) \
1206 ? GENERAL_REGS : NO_REGS) \
1207 : THUMB_SECONDARY_OUTPUT_RELOAD_CLASS (CLASS, MODE, X))
1209 /* If we need to load shorts byte-at-a-time, then we need a scratch. */
1210 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1212 (((MODE) == HImode && ! arm_arch4 && TARGET_MMU_TRAPS \
1213 && (GET_CODE (X) == MEM \
1214 || ((GET_CODE (X) == REG || GET_CODE (X) == SUBREG) \
1215 && true_regnum (X) == -1))) \
1216 ? GENERAL_REGS : NO_REGS) \
1217 : THUMB_SECONDARY_INPUT_RELOAD_CLASS (CLASS, MODE, X))
1219 /* Try a machine-dependent way of reloading an illegitimate address
1220 operand. If we find one, push the reload and jump to WIN. This
1221 macro is used in only one place: `find_reloads_address' in reload.c.
1223 For the ARM, we wish to handle large displacements off a base
1224 register by splitting the addend across a MOV and the mem insn.
1225 This can cut the number of reloads needed. */
1226 #define ARM_LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND, WIN) \
1229 if (GET_CODE (X) == PLUS \
1230 && GET_CODE (XEXP (X, 0)) == REG \
1231 && REGNO (XEXP (X, 0)) < FIRST_PSEUDO_REGISTER \
1232 && REG_MODE_OK_FOR_BASE_P (XEXP (X, 0), MODE) \
1233 && GET_CODE (XEXP (X, 1)) == CONST_INT) \
1235 HOST_WIDE_INT val = INTVAL (XEXP (X, 1)); \
1236 HOST_WIDE_INT low, high; \
1238 if (MODE == DImode || (TARGET_SOFT_FLOAT && MODE == DFmode)) \
1239 low = ((val & 0xf) ^ 0x8) - 0x8; \
1240 else if (MODE == SImode \
1241 || (MODE == SFmode && TARGET_SOFT_FLOAT) \
1242 || ((MODE == HImode || MODE == QImode) && ! arm_arch4)) \
1243 /* Need to be careful, -4096 is not a valid offset. */ \
1244 low = val >= 0 ? (val & 0xfff) : -((-val) & 0xfff); \
1245 else if ((MODE == HImode || MODE == QImode) && arm_arch4) \
1246 /* Need to be careful, -256 is not a valid offset. */ \
1247 low = val >= 0 ? (val & 0xff) : -((-val) & 0xff); \
1248 else if (GET_MODE_CLASS (MODE) == MODE_FLOAT \
1249 && TARGET_HARD_FLOAT) \
1250 /* Need to be careful, -1024 is not a valid offset. */ \
1251 low = val >= 0 ? (val & 0x3ff) : -((-val) & 0x3ff); \
1255 high = ((((val - low) & HOST_UINT (0xffffffff)) \
1256 ^ HOST_UINT (0x80000000)) \
1257 - HOST_UINT (0x80000000)); \
1258 /* Check for overflow or zero */ \
1259 if (low == 0 || high == 0 || (high + low != val)) \
1262 /* Reload the high part into a base reg; leave the low part \
1264 X = gen_rtx_PLUS (GET_MODE (X), \
1265 gen_rtx_PLUS (GET_MODE (X), XEXP (X, 0), \
1268 push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL_PTR, \
1269 BASE_REG_CLASS, GET_MODE (X), VOIDmode, 0, 0, \
1276 /* ??? If an HImode FP+large_offset address is converted to an HImode
1277 SP+large_offset address, then reload won't know how to fix it. It sees
1278 only that SP isn't valid for HImode, and so reloads the SP into an index
1279 register, but the resulting address is still invalid because the offset
1280 is too big. We fix it here instead by reloading the entire address. */
1281 /* We could probably achieve better results by defining PROMOTE_MODE to help
1282 cope with the variances between the Thumb's signed and unsigned byte and
1283 halfword load instructions. */
1284 #define THUMB_LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1286 if (GET_CODE (X) == PLUS \
1287 && GET_MODE_SIZE (MODE) < 4 \
1288 && GET_CODE (XEXP (X, 0)) == REG \
1289 && XEXP (X, 0) == stack_pointer_rtx \
1290 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1291 && ! THUMB_LEGITIMATE_OFFSET (MODE, INTVAL (XEXP (X, 1)))) \
1295 push_reload (orig_X, NULL_RTX, &X, NULL_PTR, \
1297 Pmode, VOIDmode, 0, 0, OPNUM, TYPE); \
1302 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1304 ARM_LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN); \
1306 THUMB_LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)
1308 /* Return the maximum number of consecutive registers
1309 needed to represent mode MODE in a register of class CLASS.
1310 ARM regs are UNITS_PER_WORD bits while FPU regs can hold any FP mode */
1311 #define CLASS_MAX_NREGS(CLASS, MODE) \
1312 ((CLASS) == FPU_REGS ? 1 : NUM_REGS (MODE))
1314 /* Moves between FPU_REGS and GENERAL_REGS are two memory insns. */
1315 #define REGISTER_MOVE_COST(FROM, TO) \
1317 ((FROM) == FPU_REGS && (TO) != FPU_REGS ? 20 : \
1318 (FROM) != FPU_REGS && (TO) == FPU_REGS ? 20 : 2) \
1320 ((FROM) == HI_REGS || (TO) == HI_REGS) ? 4 : 2)
1322 /* Stack layout; function entry, exit and calling. */
1324 /* Define this if pushing a word on the stack
1325 makes the stack pointer a smaller address. */
1326 #define STACK_GROWS_DOWNWARD 1
1328 /* Define this if the nominal address of the stack frame
1329 is at the high-address end of the local variables;
1330 that is, each additional local variable allocated
1331 goes at a more negative offset in the frame. */
1332 #define FRAME_GROWS_DOWNWARD 1
1334 /* Offset within stack frame to start allocating local variables at.
1335 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
1336 first local allocated. Otherwise, it is the offset to the BEGINNING
1337 of the first local allocated. */
1338 #define STARTING_FRAME_OFFSET 0
1340 /* If we generate an insn to push BYTES bytes,
1341 this says how many the stack pointer really advances by. */
1342 /* The push insns do not do this rounding implicitly.
1343 So don't define this. */
1344 /* #define PUSH_ROUNDING(NPUSHED) ROUND_UP (NPUSHED) */
1346 /* Define this if the maximum size of all the outgoing args is to be
1347 accumulated and pushed during the prologue. The amount can be
1348 found in the variable current_function_outgoing_args_size. */
1349 #define ACCUMULATE_OUTGOING_ARGS 1
1351 /* Offset of first parameter from the argument pointer register value. */
1352 #define FIRST_PARM_OFFSET(FNDECL) (TARGET_ARM ? 4 : 0)
1354 /* Value is the number of byte of arguments automatically
1355 popped when returning from a subroutine call.
1356 FUNDECL is the declaration node of the function (as a tree),
1357 FUNTYPE is the data type of the function (as a tree),
1358 or for a library call it is an identifier node for the subroutine name.
1359 SIZE is the number of bytes of arguments passed on the stack.
1361 On the ARM, the caller does not pop any of its arguments that were passed
1363 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, SIZE) 0
1365 /* Define how to find the value returned by a library function
1366 assuming the value has mode MODE. */
1367 #define LIBCALL_VALUE(MODE) \
1368 (TARGET_ARM && TARGET_HARD_FLOAT && GET_MODE_CLASS (MODE) == MODE_FLOAT \
1369 ? gen_rtx_REG (MODE, FIRST_ARM_FP_REGNUM) \
1370 : gen_rtx_REG (MODE, ARG_REGISTER (1)))
1372 /* Define how to find the value returned by a function.
1373 VALTYPE is the data type of the value (as a tree).
1374 If the precise function being called is known, FUNC is its FUNCTION_DECL;
1375 otherwise, FUNC is 0. */
1376 #define FUNCTION_VALUE(VALTYPE, FUNC) \
1377 LIBCALL_VALUE (TYPE_MODE (VALTYPE))
1379 /* 1 if N is a possible register number for a function value.
1380 On the ARM, only r0 and f0 can return results. */
1381 #define FUNCTION_VALUE_REGNO_P(REGNO) \
1382 ((REGNO) == ARG_REGISTER (1) \
1383 || (TARGET_ARM && ((REGNO) == FIRST_ARM_FP_REGNUM) && TARGET_HARD_FLOAT))
1385 /* How large values are returned */
1386 /* A C expression which can inhibit the returning of certain function values
1387 in registers, based on the type of value. */
1388 #define RETURN_IN_MEMORY(TYPE) arm_return_in_memory (TYPE)
1390 /* Define DEFAULT_PCC_STRUCT_RETURN to 1 if all structure and union return
1391 values must be in memory. On the ARM, they need only do so if larger
1392 than a word, or if they contain elements offset from zero in the struct. */
1393 #define DEFAULT_PCC_STRUCT_RETURN 0
1395 /* Flags for the call/call_value rtl operations set up by function_arg. */
1396 #define CALL_NORMAL 0x00000000 /* No special processing. */
1397 #define CALL_LONG 0x00000001 /* Always call indirect. */
1398 #define CALL_SHORT 0x00000002 /* Never call indirect. */
1400 /* These bits describe the different types of function supported
1401 by the ARM backend. They are exclusive. ie a function cannot be both a
1402 normal function and an interworked function, for example. Knowing the
1403 type of a function is important for determining its prologue and
1405 Note value 7 is currently unassigned. Also note that the interrupt
1406 function types all have bit 2 set, so that they can be tested for easily.
1407 Note that 0 is deliberately chosen for ARM_FT_UNKNOWN so that when the
1408 machine_function structure is initialised (to zero) func_type will
1409 default to unknown. This will force the first use of arm_current_func_type
1410 to call arm_compute_func_type. */
1411 #define ARM_FT_UNKNOWN 0 /* Type has not yet been determined. */
1412 #define ARM_FT_NORMAL 1 /* Your normal, straightforward function. */
1413 #define ARM_FT_INTERWORKED 2 /* A function that supports interworking. */
1414 #define ARM_FT_EXCEPTION_HANDLER 3 /* A C++ exception handler. */
1415 #define ARM_FT_ISR 4 /* An interrupt service routine. */
1416 #define ARM_FT_FIQ 5 /* A fast interrupt service routine. */
1417 #define ARM_FT_EXCEPTION 6 /* An ARM exception handler (subcase of ISR). */
1419 #define ARM_FT_TYPE_MASK ((1 << 3) - 1)
1421 /* In addition functions can have several type modifiers,
1422 outlined by these bit masks: */
1423 #define ARM_FT_INTERRUPT (1 << 2) /* Note overlap with FT_ISR and above. */
1424 #define ARM_FT_NAKED (1 << 3) /* No prologue or epilogue. */
1425 #define ARM_FT_VOLATILE (1 << 4) /* Does not return. */
1426 #define ARM_FT_NESTED (1 << 5) /* Embedded inside another func. */
1428 /* Some macros to test these flags. */
1429 #define ARM_FUNC_TYPE(t) (t & ARM_FT_TYPE_MASK)
1430 #define IS_INTERRUPT(t) (t & ARM_FT_INTERRUPT)
1431 #define IS_VOLATILE(t) (t & ARM_FT_VOLATILE)
1432 #define IS_NAKED(t) (t & ARM_FT_NAKED)
1433 #define IS_NESTED(t) (t & ARM_FT_NESTED)
1435 /* A C structure for machine-specific, per-function data.
1436 This is added to the cfun structure. */
1437 typedef struct machine_function
1439 /* Records __builtin_return address. */
1440 struct rtx_def *ra_rtx;
1441 /* Additionsl stack adjustment in __builtin_eh_throw. */
1442 struct rtx_def *eh_epilogue_sp_ofs;
1443 /* Records if LR has to be saved for far jumps. */
1445 /* Records if ARG_POINTER was ever live. */
1446 int arg_pointer_live;
1447 /* Records if the save of LR has been eliminated. */
1448 int lr_save_eliminated;
1449 /* Records the type of the current function. */
1450 unsigned long func_type;
1454 /* A C type for declaring a variable that is used as the first argument of
1455 `FUNCTION_ARG' and other related values. For some target machines, the
1456 type `int' suffices and can hold the number of bytes of argument so far. */
1459 /* This is the number of registers of arguments scanned so far. */
1461 /* One of CALL_NORMAL, CALL_LONG or CALL_SHORT . */
1465 /* Define where to put the arguments to a function.
1466 Value is zero to push the argument on the stack,
1467 or a hard register in which to store the argument.
1469 MODE is the argument's machine mode.
1470 TYPE is the data type of the argument (as a tree).
1471 This is null for libcalls where that information may
1473 CUM is a variable of type CUMULATIVE_ARGS which gives info about
1474 the preceding args and about the function being called.
1475 NAMED is nonzero if this argument is a named parameter
1476 (otherwise it is an extra parameter matching an ellipsis).
1478 On the ARM, normally the first 16 bytes are passed in registers r0-r3; all
1479 other arguments are passed on the stack. If (NAMED == 0) (which happens
1480 only in assign_parms, since SETUP_INCOMING_VARARGS is defined), say it is
1481 passed in the stack (function_prologue will indeed make it pass in the
1482 stack if necessary). */
1483 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1484 arm_function_arg (&(CUM), (MODE), (TYPE), (NAMED))
1486 /* For an arg passed partly in registers and partly in memory,
1487 this is the number of registers used.
1488 For args passed entirely in registers or entirely in memory, zero. */
1489 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
1490 ( NUM_ARG_REGS > (CUM).nregs \
1491 && (NUM_ARG_REGS < ((CUM).nregs + NUM_REGS2 (MODE, TYPE))) \
1492 ? NUM_ARG_REGS - (CUM).nregs : 0)
1494 /* Initialize a variable CUM of type CUMULATIVE_ARGS
1495 for a call to a function whose data type is FNTYPE.
1496 For a library call, FNTYPE is 0.
1497 On the ARM, the offset starts at 0. */
1498 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
1499 arm_init_cumulative_args (&(CUM), (FNTYPE), (LIBNAME), (INDIRECT))
1501 /* Update the data in CUM to advance over an argument
1502 of mode MODE and data type TYPE.
1503 (TYPE is null for libcalls where that information may not be available.) */
1504 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1505 (CUM).nregs += NUM_REGS2 (MODE, TYPE)
1507 /* 1 if N is a possible register number for function argument passing.
1508 On the ARM, r0-r3 are used to pass args. */
1509 #define FUNCTION_ARG_REGNO_P(REGNO) \
1510 ((REGNO) >= 0 && (REGNO) <= 3)
1515 /* A C expression that evaluates to true if it is ok to perform a sibling
1517 #define FUNCTION_OK_FOR_SIBCALL(DECL) arm_function_ok_for_sibcall ((DECL))
1519 /* Perform any actions needed for a function that is receiving a variable
1520 number of arguments. CUM is as above. MODE and TYPE are the mode and type
1521 of the current parameter. PRETEND_SIZE is a variable that should be set to
1522 the amount of stack that must be pushed by the prolog to pretend that our
1525 Normally, this macro will push all remaining incoming registers on the
1526 stack and set PRETEND_SIZE to the length of the registers pushed.
1528 On the ARM, PRETEND_SIZE is set in order to have the prologue push the last
1529 named arg and all anonymous args onto the stack.
1530 XXX I know the prologue shouldn't be pushing registers, but it is faster
1532 #define SETUP_INCOMING_VARARGS(CUM, MODE, TYPE, PRETEND_SIZE, NO_RTL) \
1534 extern int current_function_anonymous_args; \
1535 current_function_anonymous_args = 1; \
1536 if ((CUM).nregs < NUM_ARG_REGS) \
1537 (PRETEND_SIZE) = (NUM_ARG_REGS - (CUM).nregs) * UNITS_PER_WORD; \
1540 /* Generate assembly output for the start of a function. */
1541 #define FUNCTION_PROLOGUE(STREAM, SIZE) \
1545 output_arm_prologue (STREAM, SIZE); \
1547 output_thumb_prologue (STREAM); \
1551 /* If your target environment doesn't prefix user functions with an
1552 underscore, you may wish to re-define this to prevent any conflicts.
1553 e.g. AOF may prefix mcount with an underscore. */
1554 #ifndef ARM_MCOUNT_NAME
1555 #define ARM_MCOUNT_NAME "*mcount"
1558 /* Call the function profiler with a given profile label. The Acorn
1559 compiler puts this BEFORE the prolog but gcc puts it afterwards.
1560 On the ARM the full profile code will look like:
1569 profile_function() in final.c outputs the .data section, FUNCTION_PROFILER
1570 will output the .text section.
1572 The ``mov ip,lr'' seems like a good idea to stick with cc convention.
1573 ``prof'' doesn't seem to mind about this! */
1574 #define ARM_FUNCTION_PROFILER(STREAM, LABELNO) \
1579 asm_fprintf (STREAM, "\tmov\t%r, %r\n\tbl\t", \
1580 IP_REGNUM, LR_REGNUM); \
1581 assemble_name (STREAM, ARM_MCOUNT_NAME); \
1582 fputc ('\n', STREAM); \
1583 ASM_GENERATE_INTERNAL_LABEL (temp, "LP", LABELNO); \
1584 sym = gen_rtx (SYMBOL_REF, Pmode, temp); \
1585 ASM_OUTPUT_INT (STREAM, sym); \
1588 #define THUMB_FUNCTION_PROFILER(STREAM, LABELNO) \
1590 fprintf (STREAM, "\tmov\\tip, lr\n"); \
1591 fprintf (STREAM, "\tbl\tmcount\n"); \
1592 fprintf (STREAM, "\t.word\tLP%d\n", LABELNO); \
1595 #define FUNCTION_PROFILER(STREAM, LABELNO) \
1597 ARM_FUNCTION_PROFILER (STREAM, LABELNO) \
1599 THUMB_FUNCTION_PROFILER (STREAM, LABELNO)
1601 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1602 the stack pointer does not matter. The value is tested only in
1603 functions that have frame pointers.
1604 No definition is equivalent to always zero.
1606 On the ARM, the function epilogue recovers the stack pointer from the
1608 #define EXIT_IGNORE_STACK 1
1610 /* Generate the assembly code for function exit. */
1611 #define FUNCTION_EPILOGUE(STREAM, SIZE) \
1612 output_func_epilogue (SIZE)
1614 /* Determine if the epilogue should be output as RTL.
1615 You should override this if you define FUNCTION_EXTRA_EPILOGUE. */
1616 #define USE_RETURN_INSN(ISCOND) \
1617 (TARGET_ARM ? use_return_insn (ISCOND) : 0)
1619 /* Definitions for register eliminations.
1621 This is an array of structures. Each structure initializes one pair
1622 of eliminable registers. The "from" register number is given first,
1623 followed by "to". Eliminations of the same "from" register are listed
1624 in order of preference.
1626 We have two registers that can be eliminated on the ARM. First, the
1627 arg pointer register can often be eliminated in favor of the stack
1628 pointer register. Secondly, the pseudo frame pointer register can always
1629 be eliminated; it is replaced with either the stack or the real frame
1630 pointer. Note we have to use {ARM|THUMB}_HARD_FRAME_POINTER_REGNUM
1631 because the defintion of HARD_FRAME_POINTER_REGNUM is not a constant. */
1633 #define ELIMINABLE_REGS \
1634 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM },\
1635 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM },\
1636 { ARG_POINTER_REGNUM, ARM_HARD_FRAME_POINTER_REGNUM },\
1637 { ARG_POINTER_REGNUM, THUMB_HARD_FRAME_POINTER_REGNUM },\
1638 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM },\
1639 { FRAME_POINTER_REGNUM, ARM_HARD_FRAME_POINTER_REGNUM },\
1640 { FRAME_POINTER_REGNUM, THUMB_HARD_FRAME_POINTER_REGNUM }}
1642 /* Given FROM and TO register numbers, say whether this elimination is
1643 allowed. Frame pointer elimination is automatically handled.
1645 All eliminations are permissible. Note that ARG_POINTER_REGNUM and
1646 HARD_FRAME_POINTER_REGNUM are in fact the same thing. If we need a frame
1647 pointer, we must eliminate FRAME_POINTER_REGNUM into
1648 HARD_FRAME_POINTER_REGNUM and not into STACK_POINTER_REGNUM or
1649 ARG_POINTER_REGNUM. */
1650 #define CAN_ELIMINATE(FROM, TO) \
1651 (((TO) == FRAME_POINTER_REGNUM && (FROM) == ARG_POINTER_REGNUM) ? 0 : \
1652 ((TO) == STACK_POINTER_REGNUM && frame_pointer_needed) ? 0 : \
1653 ((TO) == ARM_HARD_FRAME_POINTER_REGNUM && TARGET_THUMB) ? 0 : \
1654 ((TO) == THUMB_HARD_FRAME_POINTER_REGNUM && TARGET_ARM) ? 0 : \
1657 /* Define the offset between two registers, one to be eliminated, and the
1658 other its replacement, at the start of a routine. */
1659 #define ARM_INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1661 int volatile_func = IS_VOLATILE (arm_current_func_type ()); \
1662 if ((FROM) == ARG_POINTER_REGNUM && (TO) == HARD_FRAME_POINTER_REGNUM)\
1664 if (! current_function_needs_context || ! frame_pointer_needed) \
1669 else if ((FROM) == FRAME_POINTER_REGNUM \
1670 && (TO) == STACK_POINTER_REGNUM) \
1671 (OFFSET) = current_function_outgoing_args_size \
1672 + ROUND_UP (get_frame_size ()); \
1677 int saved_hard_reg = 0; \
1679 if (! volatile_func) \
1681 for (regno = 0; regno <= 10; regno++) \
1682 if (regs_ever_live[regno] && ! call_used_regs[regno]) \
1683 saved_hard_reg = 1, offset += 4; \
1684 if (! TARGET_APCS_FRAME \
1685 && ! frame_pointer_needed \
1686 && regs_ever_live[HARD_FRAME_POINTER_REGNUM] \
1687 && ! call_used_regs[HARD_FRAME_POINTER_REGNUM]) \
1688 saved_hard_reg = 1, offset += 4; \
1689 /* PIC register is a fixed reg, so call_used_regs set. */ \
1690 if (flag_pic && regs_ever_live[PIC_OFFSET_TABLE_REGNUM]) \
1691 saved_hard_reg = 1, offset += 4; \
1692 for (regno = FIRST_ARM_FP_REGNUM; \
1693 regno <= LAST_ARM_FP_REGNUM; regno++) \
1694 if (regs_ever_live[regno] && ! call_used_regs[regno]) \
1697 if ((FROM) == FRAME_POINTER_REGNUM) \
1698 (OFFSET) = - offset; \
1701 if (! frame_pointer_needed) \
1703 if (! volatile_func \
1704 && (regs_ever_live[LR_REGNUM] || saved_hard_reg)) \
1706 offset += current_function_outgoing_args_size; \
1707 (OFFSET) = ROUND_UP (get_frame_size ()) + offset; \
1712 /* Note: This macro must match the code in thumb_function_prologue(). */
1713 #define THUMB_INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1716 if ((FROM) == ARG_POINTER_REGNUM) \
1718 int count_regs = 0; \
1720 for (regno = 8; regno < 13; regno ++) \
1721 if (regs_ever_live[regno] && ! call_used_regs[regno]) \
1724 (OFFSET) += 4 * count_regs; \
1726 for (regno = 0; regno <= LAST_LO_REGNUM; regno ++) \
1727 if (regs_ever_live[regno] && ! call_used_regs[regno]) \
1729 if (count_regs || ! leaf_function_p () || thumb_far_jump_used_p (0))\
1730 (OFFSET) += 4 * (count_regs + 1); \
1731 if (TARGET_BACKTRACE) \
1733 if ((count_regs & 0xFF) == 0 && (regs_ever_live[3] != 0)) \
1739 if ((TO) == STACK_POINTER_REGNUM) \
1741 (OFFSET) += current_function_outgoing_args_size; \
1742 (OFFSET) += ROUND_UP (get_frame_size ()); \
1746 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1748 ARM_INITIAL_ELIMINATION_OFFSET (FROM, TO, OFFSET) \
1750 THUMB_INITIAL_ELIMINATION_OFFSET (FROM, TO, OFFSET)
1752 /* Special case handling of the location of arguments passed on the stack. */
1753 #define DEBUGGER_ARG_OFFSET(value, addr) value ? value : arm_debugger_arg_offset (value, addr)
1755 /* Initialize data used by insn expanders. This is called from insn_emit,
1756 once for every function before code is generated. */
1757 #define INIT_EXPANDERS arm_init_expanders ()
1759 /* Output assembler code for a block containing the constant parts
1760 of a trampoline, leaving space for the variable parts.
1762 On the ARM, (if r8 is the static chain regnum, and remembering that
1763 referencing pc adds an offset of 8) the trampoline looks like:
1766 .word static chain value
1767 .word function's address
1768 ??? FIXME: When the trampoline returns, r8 will be clobbered. */
1769 #define ARM_TRAMPOLINE_TEMPLATE(FILE) \
1771 asm_fprintf (FILE, "\tldr\t%r, [%r, #0]\n", \
1772 STATIC_CHAIN_REGNUM, PC_REGNUM); \
1773 asm_fprintf (FILE, "\tldr\t%r, [%r, #0]\n", \
1774 PC_REGNUM, PC_REGNUM); \
1775 ASM_OUTPUT_INT (FILE, const0_rtx); \
1776 ASM_OUTPUT_INT (FILE, const0_rtx); \
1779 /* On the Thumb we always switch into ARM mode to execute the trampoline.
1780 Why - because it is easier. This code will always be branched to via
1781 a BX instruction and since the compiler magically generates the address
1782 of the function the linker has no opportunity to ensure that the
1783 bottom bit is set. Thus the processor will be in ARM mode when it
1784 reaches this code. So we duplicate the ARM trampoline code and add
1785 a switch into Thumb mode as well. */
1786 #define THUMB_TRAMPOLINE_TEMPLATE(FILE) \
1788 fprintf (FILE, "\t.code 32\n"); \
1789 fprintf (FILE, ".Ltrampoline_start:\n"); \
1790 asm_fprintf (FILE, "\tldr\t%r, [%r, #8]\n", \
1791 STATIC_CHAIN_REGNUM, PC_REGNUM); \
1792 asm_fprintf (FILE, "\tldr\t%r, [%r, #8]\n", \
1793 IP_REGNUM, PC_REGNUM); \
1794 asm_fprintf (FILE, "\torr\t%r, %r, #1\n", \
1795 IP_REGNUM, IP_REGNUM); \
1796 asm_fprintf (FILE, "\tbx\t%r\n", IP_REGNUM); \
1797 fprintf (FILE, "\t.word\t0\n"); \
1798 fprintf (FILE, "\t.word\t0\n"); \
1799 fprintf (FILE, "\t.code 16\n"); \
1802 #define TRAMPOLINE_TEMPLATE(FILE) \
1804 ARM_TRAMPOLINE_TEMPLATE (FILE) \
1806 THUMB_TRAMPOLINE_TEMPLATE (FILE)
1808 /* Length in units of the trampoline for entering a nested function. */
1809 #define TRAMPOLINE_SIZE (TARGET_ARM ? 16 : 24)
1811 /* Alignment required for a trampoline in units. */
1812 #define TRAMPOLINE_ALIGN 4
1814 /* Emit RTL insns to initialize the variable parts of a trampoline.
1815 FNADDR is an RTX for the address of the function's pure code.
1816 CXT is an RTX for the static chain value for the function. */
1817 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
1820 (gen_rtx_MEM (SImode, plus_constant (TRAMP, TARGET_ARM ? 8 : 16)), CXT); \
1822 (gen_rtx_MEM (SImode, plus_constant (TRAMP, TARGET_ARM ? 12 : 20)), FNADDR); \
1826 /* Addressing modes, and classification of registers for them. */
1827 #define HAVE_POST_INCREMENT 1
1828 #define HAVE_PRE_INCREMENT TARGET_ARM
1829 #define HAVE_POST_DECREMENT TARGET_ARM
1830 #define HAVE_PRE_DECREMENT TARGET_ARM
1832 /* Macros to check register numbers against specific register classes. */
1834 /* These assume that REGNO is a hard or pseudo reg number.
1835 They give nonzero only if REGNO is a hard reg of the suitable class
1836 or a pseudo reg currently allocated to a suitable hard reg.
1837 Since they use reg_renumber, they are safe only once reg_renumber
1838 has been allocated, which happens in local-alloc.c. */
1839 #define TEST_REGNO(R, TEST, VALUE) \
1840 ((R TEST VALUE) || ((unsigned) reg_renumber[R] TEST VALUE))
1842 /* On the ARM, don't allow the pc to be used. */
1843 #define ARM_REGNO_OK_FOR_BASE_P(REGNO) \
1844 (TEST_REGNO (REGNO, <, PC_REGNUM) \
1845 || TEST_REGNO (REGNO, ==, FRAME_POINTER_REGNUM) \
1846 || TEST_REGNO (REGNO, ==, ARG_POINTER_REGNUM))
1848 #define THUMB_REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
1849 (TEST_REGNO (REGNO, <=, LAST_LO_REGNUM) \
1850 || (GET_MODE_SIZE (MODE) >= 4 \
1851 && TEST_REGNO (REGNO, ==, STACK_POINTER_REGNUM)))
1853 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
1855 ? THUMB_REGNO_MODE_OK_FOR_BASE_P (REGNO, MODE) \
1856 : ARM_REGNO_OK_FOR_BASE_P (REGNO))
1858 /* For ARM code, we don't care about the mode, but for Thumb, the index
1859 must be suitable for use in a QImode load. */
1860 #define REGNO_OK_FOR_INDEX_P(REGNO) \
1861 REGNO_MODE_OK_FOR_BASE_P (REGNO, QImode)
1863 /* Maximum number of registers that can appear in a valid memory address.
1864 Shifts in addresses can't be by a register. */
1865 #define MAX_REGS_PER_ADDRESS 2
1867 /* Recognize any constant value that is a valid address. */
1868 /* XXX We can address any constant, eventually... */
1870 #ifdef AOF_ASSEMBLER
1872 #define CONSTANT_ADDRESS_P(X) \
1873 (GET_CODE (X) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (X))
1877 #define CONSTANT_ADDRESS_P(X) \
1878 (GET_CODE (X) == SYMBOL_REF \
1879 && (CONSTANT_POOL_ADDRESS_P (X) \
1880 || (TARGET_ARM && optimize > 0 && SYMBOL_REF_FLAG (X))))
1882 #endif /* AOF_ASSEMBLER */
1884 /* Nonzero if the constant value X is a legitimate general operand.
1885 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
1887 On the ARM, allow any integer (invalid ones are removed later by insn
1888 patterns), nice doubles and symbol_refs which refer to the function's
1891 When generating pic allow anything. */
1892 #define ARM_LEGITIMATE_CONSTANT_P(X) (flag_pic || ! label_mentioned_p (X))
1894 #define THUMB_LEGITIMATE_CONSTANT_P(X) \
1895 ( GET_CODE (X) == CONST_INT \
1896 || GET_CODE (X) == CONST_DOUBLE \
1897 || CONSTANT_ADDRESS_P (X))
1899 #define LEGITIMATE_CONSTANT_P(X) \
1900 (TARGET_ARM ? ARM_LEGITIMATE_CONSTANT_P (X) : THUMB_LEGITIMATE_CONSTANT_P (X))
1902 /* Special characters prefixed to function names
1903 in order to encode attribute like information.
1904 Note, '@' and '*' have already been taken. */
1905 #define SHORT_CALL_FLAG_CHAR '^'
1906 #define LONG_CALL_FLAG_CHAR '#'
1908 #define ENCODED_SHORT_CALL_ATTR_P(SYMBOL_NAME) \
1909 (*(SYMBOL_NAME) == SHORT_CALL_FLAG_CHAR)
1911 #define ENCODED_LONG_CALL_ATTR_P(SYMBOL_NAME) \
1912 (*(SYMBOL_NAME) == LONG_CALL_FLAG_CHAR)
1914 #ifndef SUBTARGET_NAME_ENCODING_LENGTHS
1915 #define SUBTARGET_NAME_ENCODING_LENGTHS
1918 /* This is a C fragement for the inside of a switch statement.
1919 Each case label should return the number of characters to
1920 be stripped from the start of a function's name, if that
1921 name starts with the indicated character. */
1922 #define ARM_NAME_ENCODING_LENGTHS \
1923 case SHORT_CALL_FLAG_CHAR: return 1; \
1924 case LONG_CALL_FLAG_CHAR: return 1; \
1925 case '*': return 1; \
1926 SUBTARGET_NAME_ENCODING_LENGTHS
1928 /* This has to be handled by a function because more than part of the
1929 ARM backend uses function name prefixes to encode attributes. */
1930 #undef STRIP_NAME_ENCODING
1931 #define STRIP_NAME_ENCODING(VAR, SYMBOL_NAME) \
1932 (VAR) = arm_strip_name_encoding (SYMBOL_NAME)
1934 /* This is how to output a reference to a user-level label named NAME.
1935 `assemble_name' uses this. */
1936 #undef ASM_OUTPUT_LABELREF
1937 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
1938 fprintf (FILE, "%s%s", USER_LABEL_PREFIX, arm_strip_name_encoding (NAME))
1940 /* If we are referencing a function that is weak then encode a long call
1941 flag in the function name, otherwise if the function is static or
1942 or known to be defined in this file then encode a short call flag.
1943 This macro is used inside the ENCODE_SECTION macro. */
1944 #define ARM_ENCODE_CALL_TYPE(decl) \
1945 if (TREE_CODE (decl) == FUNCTION_DECL) \
1947 if (DECL_WEAK (decl)) \
1948 arm_encode_call_attribute (decl, LONG_CALL_FLAG_CHAR); \
1949 else if (! TREE_PUBLIC (decl)) \
1950 arm_encode_call_attribute (decl, SHORT_CALL_FLAG_CHAR); \
1953 /* Symbols in the text segment can be accessed without indirecting via the
1954 constant pool; it may take an extra binary operation, but this is still
1955 faster than indirecting via memory. Don't do this when not optimizing,
1956 since we won't be calculating al of the offsets necessary to do this
1958 /* This doesn't work with AOF syntax, since the string table may be in
1959 a different AREA. */
1960 #ifndef AOF_ASSEMBLER
1961 #define ENCODE_SECTION_INFO(decl) \
1963 if (optimize > 0 && TREE_CONSTANT (decl) \
1964 && (!flag_writable_strings || TREE_CODE (decl) != STRING_CST)) \
1966 rtx rtl = (TREE_CODE_CLASS (TREE_CODE (decl)) != 'd' \
1967 ? TREE_CST_RTL (decl) : DECL_RTL (decl)); \
1968 SYMBOL_REF_FLAG (XEXP (rtl, 0)) = 1; \
1970 ARM_ENCODE_CALL_TYPE (decl) \
1973 #define ENCODE_SECTION_INFO(decl) \
1975 ARM_ENCODE_CALL_TYPE (decl) \
1979 #define ARM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
1980 arm_encode_call_attribute (DECL, SHORT_CALL_FLAG_CHAR)
1982 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
1983 and check its validity for a certain class.
1984 We have two alternate definitions for each of them.
1985 The usual definition accepts all pseudo regs; the other rejects
1986 them unless they have been allocated suitable hard regs.
1987 The symbol REG_OK_STRICT causes the latter definition to be used. */
1988 #ifndef REG_OK_STRICT
1990 #define ARM_REG_OK_FOR_BASE_P(X) \
1991 (REGNO (X) <= LAST_ARM_REGNUM \
1992 || REGNO (X) >= FIRST_PSEUDO_REGISTER \
1993 || REGNO (X) == FRAME_POINTER_REGNUM \
1994 || REGNO (X) == ARG_POINTER_REGNUM)
1996 #define THUMB_REG_MODE_OK_FOR_BASE_P(X, MODE) \
1997 (REGNO (X) <= LAST_LO_REGNUM \
1998 || REGNO (X) >= FIRST_PSEUDO_REGISTER \
1999 || (GET_MODE_SIZE (MODE) >= 4 \
2000 && (REGNO (X) == STACK_POINTER_REGNUM \
2001 || (X) == hard_frame_pointer_rtx \
2002 || (X) == arg_pointer_rtx)))
2004 #else /* REG_OK_STRICT */
2006 #define ARM_REG_OK_FOR_BASE_P(X) \
2007 ARM_REGNO_OK_FOR_BASE_P (REGNO (X))
2009 #define THUMB_REG_MODE_OK_FOR_BASE_P(X, MODE) \
2010 THUMB_REGNO_MODE_OK_FOR_BASE_P (REGNO (X), MODE)
2012 #endif /* REG_OK_STRICT */
2014 /* Now define some helpers in terms of the above. */
2016 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
2018 ? THUMB_REG_MODE_OK_FOR_BASE_P (X, MODE) \
2019 : ARM_REG_OK_FOR_BASE_P (X))
2021 #define ARM_REG_OK_FOR_INDEX_P(X) ARM_REG_OK_FOR_BASE_P (X)
2023 /* For Thumb, a valid index register is anything that can be used in
2024 a byte load instruction. */
2025 #define THUMB_REG_OK_FOR_INDEX_P(X) THUMB_REG_MODE_OK_FOR_BASE_P (X, QImode)
2027 /* Nonzero if X is a hard reg that can be used as an index
2028 or if it is a pseudo reg. On the Thumb, the stack pointer
2030 #define REG_OK_FOR_INDEX_P(X) \
2032 ? THUMB_REG_OK_FOR_INDEX_P (X) \
2033 : ARM_REG_OK_FOR_INDEX_P (X))
2036 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
2037 that is a valid memory address for an instruction.
2038 The MODE argument is the machine mode for the MEM expression
2039 that wants to use this address.
2041 The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS. */
2043 /* --------------------------------arm version----------------------------- */
2044 #define ARM_BASE_REGISTER_RTX_P(X) \
2045 (GET_CODE (X) == REG && ARM_REG_OK_FOR_BASE_P (X))
2047 #define ARM_INDEX_REGISTER_RTX_P(X) \
2048 (GET_CODE (X) == REG && ARM_REG_OK_FOR_INDEX_P (X))
2050 /* A C statement (sans semicolon) to jump to LABEL for legitimate index RTXs
2051 used by the macro GO_IF_LEGITIMATE_ADDRESS. Floating point indices can
2052 only be small constants. */
2053 #define ARM_GO_IF_LEGITIMATE_INDEX(MODE, BASE_REGNO, INDEX, LABEL) \
2056 HOST_WIDE_INT range; \
2057 enum rtx_code code = GET_CODE (INDEX); \
2059 if (TARGET_HARD_FLOAT && GET_MODE_CLASS (MODE) == MODE_FLOAT) \
2061 if (code == CONST_INT && INTVAL (INDEX) < 1024 \
2062 && INTVAL (INDEX) > -1024 \
2063 && (INTVAL (INDEX) & 3) == 0) \
2068 if (ARM_INDEX_REGISTER_RTX_P (INDEX) \
2069 && GET_MODE_SIZE (MODE) <= 4) \
2071 if (GET_MODE_SIZE (MODE) <= 4 && code == MULT \
2072 && (! arm_arch4 || (MODE) != HImode)) \
2074 rtx xiop0 = XEXP (INDEX, 0); \
2075 rtx xiop1 = XEXP (INDEX, 1); \
2076 if (ARM_INDEX_REGISTER_RTX_P (xiop0) \
2077 && power_of_two_operand (xiop1, SImode)) \
2079 if (ARM_INDEX_REGISTER_RTX_P (xiop1) \
2080 && power_of_two_operand (xiop0, SImode)) \
2083 if (GET_MODE_SIZE (MODE) <= 4 \
2084 && (code == LSHIFTRT || code == ASHIFTRT \
2085 || code == ASHIFT || code == ROTATERT) \
2086 && (! arm_arch4 || (MODE) != HImode)) \
2088 rtx op = XEXP (INDEX, 1); \
2089 if (ARM_INDEX_REGISTER_RTX_P (XEXP (INDEX, 0)) \
2090 && GET_CODE (op) == CONST_INT && INTVAL (op) > 0 \
2091 && INTVAL (op) <= 31) \
2094 /* NASTY: Since this limits the addressing of unsigned \
2096 range = ((MODE) == HImode || (MODE) == QImode) \
2097 ? (arm_arch4 ? 256 : 4095) : 4096; \
2098 if (code == CONST_INT && INTVAL (INDEX) < range \
2099 && INTVAL (INDEX) > -range) \
2105 /* Jump to LABEL if X is a valid address RTX. This must take
2106 REG_OK_STRICT into account when deciding about valid registers.
2108 Allow REG, REG+REG, REG+INDEX, INDEX+REG, REG-INDEX, and non
2109 floating SYMBOL_REF to the constant pool. Allow REG-only and
2110 AUTINC-REG if handling TImode or HImode. Other symbol refs must be
2111 forced though a static cell to ensure addressability. */
2112 #define ARM_GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
2114 if (ARM_BASE_REGISTER_RTX_P (X)) \
2116 else if ((GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC) \
2117 && GET_CODE (XEXP (X, 0)) == REG \
2118 && ARM_REG_OK_FOR_BASE_P (XEXP (X, 0))) \
2120 else if (GET_MODE_SIZE (MODE) >= 4 && reload_completed \
2121 && (GET_CODE (X) == LABEL_REF \
2122 || (GET_CODE (X) == CONST \
2123 && GET_CODE (XEXP ((X), 0)) == PLUS \
2124 && GET_CODE (XEXP (XEXP ((X), 0), 0)) == LABEL_REF \
2125 && GET_CODE (XEXP (XEXP ((X), 0), 1)) == CONST_INT)))\
2127 else if ((MODE) == TImode) \
2129 else if ((MODE) == DImode || (TARGET_SOFT_FLOAT && (MODE) == DFmode)) \
2131 if (GET_CODE (X) == PLUS && ARM_BASE_REGISTER_RTX_P (XEXP (X, 0)) \
2132 && GET_CODE (XEXP (X, 1)) == CONST_INT) \
2134 HOST_WIDE_INT val = INTVAL (XEXP (X, 1)); \
2135 if (val == 4 || val == -4 || val == -8) \
2139 else if (GET_CODE (X) == PLUS) \
2141 rtx xop0 = XEXP (X, 0); \
2142 rtx xop1 = XEXP (X, 1); \
2144 if (ARM_BASE_REGISTER_RTX_P (xop0)) \
2145 ARM_GO_IF_LEGITIMATE_INDEX (MODE, REGNO (xop0), xop1, LABEL); \
2146 else if (ARM_BASE_REGISTER_RTX_P (xop1)) \
2147 ARM_GO_IF_LEGITIMATE_INDEX (MODE, REGNO (xop1), xop0, LABEL); \
2149 /* Reload currently can't handle MINUS, so disable this for now */ \
2150 /* else if (GET_CODE (X) == MINUS) \
2152 rtx xop0 = XEXP (X,0); \
2153 rtx xop1 = XEXP (X,1); \
2155 if (ARM_BASE_REGISTER_RTX_P (xop0)) \
2156 ARM_GO_IF_LEGITIMATE_INDEX (MODE, -1, xop1, LABEL); \
2158 else if (GET_MODE_CLASS (MODE) != MODE_FLOAT \
2159 && GET_CODE (X) == SYMBOL_REF \
2160 && CONSTANT_POOL_ADDRESS_P (X) \
2162 && symbol_mentioned_p (get_pool_constant (X)))) \
2164 else if ((GET_CODE (X) == PRE_INC || GET_CODE (X) == POST_DEC) \
2165 && (GET_MODE_SIZE (MODE) <= 4) \
2166 && GET_CODE (XEXP (X, 0)) == REG \
2167 && ARM_REG_OK_FOR_BASE_P (XEXP (X, 0))) \
2171 /* ---------------------thumb version----------------------------------*/
2172 #define THUMB_LEGITIMATE_OFFSET(MODE, VAL) \
2173 (GET_MODE_SIZE (MODE) == 1 ? ((unsigned HOST_WIDE_INT) (VAL) < 32) \
2174 : GET_MODE_SIZE (MODE) == 2 ? ((unsigned HOST_WIDE_INT) (VAL) < 64 \
2175 && ((VAL) & 1) == 0) \
2176 : ((VAL) >= 0 && ((VAL) + GET_MODE_SIZE (MODE)) <= 128 \
2177 && ((VAL) & 3) == 0))
2179 /* The AP may be eliminated to either the SP or the FP, so we use the
2180 least common denominator, e.g. SImode, and offsets from 0 to 64. */
2182 /* ??? Verify whether the above is the right approach. */
2184 /* ??? Also, the FP may be eliminated to the SP, so perhaps that
2185 needs special handling also. */
2187 /* ??? Look at how the mips16 port solves this problem. It probably uses
2188 better ways to solve some of these problems. */
2190 /* Although it is not incorrect, we don't accept QImode and HImode
2191 addresses based on the frame pointer or arg pointer until the
2192 reload pass starts. This is so that eliminating such addresses
2193 into stack based ones won't produce impossible code. */
2194 #define THUMB_GO_IF_LEGITIMATE_ADDRESS(MODE, X, WIN) \
2196 /* ??? Not clear if this is right. Experiment. */ \
2197 if (GET_MODE_SIZE (MODE) < 4 \
2198 && ! (reload_in_progress || reload_completed) \
2199 && ( reg_mentioned_p (frame_pointer_rtx, X) \
2200 || reg_mentioned_p (arg_pointer_rtx, X) \
2201 || reg_mentioned_p (virtual_incoming_args_rtx, X) \
2202 || reg_mentioned_p (virtual_outgoing_args_rtx, X) \
2203 || reg_mentioned_p (virtual_stack_dynamic_rtx, X) \
2204 || reg_mentioned_p (virtual_stack_vars_rtx, X))) \
2206 /* Accept any base register. SP only in SImode or larger. */ \
2207 else if (GET_CODE (X) == REG \
2208 && THUMB_REG_MODE_OK_FOR_BASE_P (X, MODE)) \
2210 /* This is PC relative data before MACHINE_DEPENDENT_REORG runs. */ \
2211 else if (GET_MODE_SIZE (MODE) >= 4 && CONSTANT_P (X) \
2212 && CONSTANT_POOL_ADDRESS_P (X) && ! flag_pic) \
2214 /* This is PC relative data after MACHINE_DEPENDENT_REORG runs. */ \
2215 else if (GET_MODE_SIZE (MODE) >= 4 && reload_completed \
2216 && (GET_CODE (X) == LABEL_REF \
2217 || (GET_CODE (X) == CONST \
2218 && GET_CODE (XEXP (X, 0)) == PLUS \
2219 && GET_CODE (XEXP (XEXP (X, 0), 0)) == LABEL_REF \
2220 && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT))) \
2222 /* Post-inc indexing only supported for SImode and larger. */ \
2223 else if (GET_CODE (X) == POST_INC && GET_MODE_SIZE (MODE) >= 4 \
2224 && GET_CODE (XEXP (X, 0)) == REG \
2225 && THUMB_REG_OK_FOR_INDEX_P (XEXP (X, 0))) \
2227 else if (GET_CODE (X) == PLUS) \
2229 /* REG+REG address can be any two index registers. */ \
2230 /* We disallow FRAME+REG addressing since we know that FRAME \
2231 will be replaced with STACK, and SP relative addressing only \
2232 permits SP+OFFSET. */ \
2233 if (GET_MODE_SIZE (MODE) <= 4 \
2234 && GET_CODE (XEXP (X, 0)) == REG \
2235 && GET_CODE (XEXP (X, 1)) == REG \
2236 && XEXP (X, 0) != frame_pointer_rtx \
2237 && XEXP (X, 1) != frame_pointer_rtx \
2238 && XEXP (X, 0) != virtual_stack_vars_rtx \
2239 && XEXP (X, 1) != virtual_stack_vars_rtx \
2240 && THUMB_REG_OK_FOR_INDEX_P (XEXP (X, 0)) \
2241 && THUMB_REG_OK_FOR_INDEX_P (XEXP (X, 1))) \
2243 /* REG+const has 5-7 bit offset for non-SP registers. */ \
2244 else if (GET_CODE (XEXP (X, 0)) == REG \
2245 && (THUMB_REG_OK_FOR_INDEX_P (XEXP (X, 0)) \
2246 || XEXP (X, 0) == arg_pointer_rtx) \
2247 && GET_CODE (XEXP (X, 1)) == CONST_INT \
2248 && THUMB_LEGITIMATE_OFFSET (MODE, INTVAL (XEXP (X, 1)))) \
2250 /* REG+const has 10 bit offset for SP, but only SImode and \
2251 larger is supported. */ \
2252 /* ??? Should probably check for DI/DFmode overflow here \
2253 just like GO_IF_LEGITIMATE_OFFSET does. */ \
2254 else if (GET_CODE (XEXP (X, 0)) == REG \
2255 && REGNO (XEXP (X, 0)) == STACK_POINTER_REGNUM \
2256 && GET_MODE_SIZE (MODE) >= 4 \
2257 && GET_CODE (XEXP (X, 1)) == CONST_INT \
2258 && ((unsigned HOST_WIDE_INT) INTVAL (XEXP (X, 1)) \
2259 + GET_MODE_SIZE (MODE)) <= 1024 \
2260 && (INTVAL (XEXP (X, 1)) & 3) == 0) \
2262 else if (GET_CODE (XEXP (X, 0)) == REG \
2263 && REGNO (XEXP (X, 0)) == FRAME_POINTER_REGNUM \
2264 && GET_MODE_SIZE (MODE) >= 4 \
2265 && GET_CODE (XEXP (X, 1)) == CONST_INT \
2266 && (INTVAL (XEXP (X, 1)) & 3) == 0) \
2269 else if (GET_MODE_CLASS (MODE) != MODE_FLOAT \
2270 && GET_CODE (X) == SYMBOL_REF \
2271 && CONSTANT_POOL_ADDRESS_P (X) \
2273 && symbol_mentioned_p (get_pool_constant (X)))) \
2277 /* ------------------------------------------------------------------- */
2278 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, WIN) \
2280 ARM_GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN) \
2281 else /* if (TARGET_THUMB) */ \
2282 THUMB_GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN)
2283 /* ------------------------------------------------------------------- */
2285 /* Try machine-dependent ways of modifying an illegitimate address
2286 to be legitimate. If we find one, return the new, valid address.
2287 This macro is used in only one place: `memory_address' in explow.c.
2289 OLDX is the address as it was before break_out_memory_refs was called.
2290 In some cases it is useful to look at this to decide what needs to be done.
2292 MODE and WIN are passed so that this macro can use
2293 GO_IF_LEGITIMATE_ADDRESS.
2295 It is always safe for this macro to do nothing. It exists to recognize
2296 opportunities to optimize the output.
2298 On the ARM, try to convert [REG, #BIGCONST]
2299 into ADD BASE, REG, #UPPERCONST and [BASE, #VALIDCONST],
2300 where VALIDCONST == 0 in case of TImode. */
2301 #define ARM_LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2303 if (GET_CODE (X) == PLUS) \
2305 rtx xop0 = XEXP (X, 0); \
2306 rtx xop1 = XEXP (X, 1); \
2308 if (CONSTANT_P (xop0) && ! symbol_mentioned_p (xop0)) \
2309 xop0 = force_reg (SImode, xop0); \
2310 if (CONSTANT_P (xop1) && ! symbol_mentioned_p (xop1)) \
2311 xop1 = force_reg (SImode, xop1); \
2312 if (ARM_BASE_REGISTER_RTX_P (xop0) \
2313 && GET_CODE (xop1) == CONST_INT) \
2315 HOST_WIDE_INT n, low_n; \
2316 rtx base_reg, val; \
2317 n = INTVAL (xop1); \
2319 if (MODE == DImode || (TARGET_SOFT_FLOAT && MODE == DFmode)) \
2331 low_n = ((MODE) == TImode ? 0 \
2332 : n >= 0 ? (n & 0xfff) : -((-n) & 0xfff)); \
2335 base_reg = gen_reg_rtx (SImode); \
2336 val = force_operand (gen_rtx_PLUS (SImode, xop0, \
2337 GEN_INT (n)), NULL_RTX); \
2338 emit_move_insn (base_reg, val); \
2339 (X) = (low_n == 0 ? base_reg \
2340 : gen_rtx_PLUS (SImode, base_reg, GEN_INT (low_n))); \
2342 else if (xop0 != XEXP (X, 0) || xop1 != XEXP (x, 1)) \
2343 (X) = gen_rtx_PLUS (SImode, xop0, xop1); \
2345 else if (GET_CODE (X) == MINUS) \
2347 rtx xop0 = XEXP (X, 0); \
2348 rtx xop1 = XEXP (X, 1); \
2350 if (CONSTANT_P (xop0)) \
2351 xop0 = force_reg (SImode, xop0); \
2352 if (CONSTANT_P (xop1) && ! symbol_mentioned_p (xop1)) \
2353 xop1 = force_reg (SImode, xop1); \
2354 if (xop0 != XEXP (X, 0) || xop1 != XEXP (X, 1)) \
2355 (X) = gen_rtx_MINUS (SImode, xop0, xop1); \
2358 (X) = legitimize_pic_address (OLDX, MODE, NULL_RTX); \
2359 if (memory_address_p (MODE, X)) \
2363 #define THUMB_LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2365 (X) = legitimize_pic_address (OLDX, MODE, NULL_RTX);
2367 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2369 ARM_LEGITIMIZE_ADDRESS (X, OLDX, MODE, WIN) \
2371 THUMB_LEGITIMIZE_ADDRESS (X, OLDX, MODE, WIN)
2373 /* Go to LABEL if ADDR (a legitimate address expression)
2374 has an effect that depends on the machine mode it is used for. */
2375 #define ARM_GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
2377 if ( GET_CODE (ADDR) == PRE_DEC || GET_CODE (ADDR) == POST_DEC \
2378 || GET_CODE (ADDR) == PRE_INC || GET_CODE (ADDR) == POST_INC) \
2382 /* Nothing helpful to do for the Thumb */
2383 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
2385 ARM_GO_IF_MODE_DEPENDENT_ADDRESS (ADDR, LABEL)
2388 /* Specify the machine mode that this machine uses
2389 for the index in the tablejump instruction. */
2390 #define CASE_VECTOR_MODE Pmode
2392 /* Define as C expression which evaluates to nonzero if the tablejump
2393 instruction expects the table to contain offsets from the address of the
2395 Do not define this if the table should contain absolute addresses. */
2396 /* #define CASE_VECTOR_PC_RELATIVE 1 */
2398 /* Specify the tree operation to be used to convert reals to integers. */
2399 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
2401 /* This is the kind of divide that is easiest to do in the general case. */
2402 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
2404 /* signed 'char' is most compatible, but RISC OS wants it unsigned.
2405 unsigned is probably best, but may break some code. */
2406 #ifndef DEFAULT_SIGNED_CHAR
2407 #define DEFAULT_SIGNED_CHAR 0
2410 /* Don't cse the address of the function being compiled. */
2411 #define NO_RECURSIVE_FUNCTION_CSE 1
2413 /* Max number of bytes we can move from memory to memory
2414 in one reasonably fast instruction. */
2418 #define MOVE_RATIO (arm_is_xscale ? 4 : 2)
2420 /* Define if operations between registers always perform the operation
2421 on the full register even if a narrower mode is specified. */
2422 #define WORD_REGISTER_OPERATIONS
2424 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD
2425 will either zero-extend or sign-extend. The value of this macro should
2426 be the code that says which one of the two operations is implicitly
2427 done, NIL if none. */
2428 #define LOAD_EXTEND_OP(MODE) \
2429 (TARGET_THUMB ? ZERO_EXTEND : \
2430 ((arm_arch4 || (MODE) == QImode) ? ZERO_EXTEND \
2431 : ((BYTES_BIG_ENDIAN && (MODE) == HImode) ? SIGN_EXTEND : NIL)))
2433 /* Define this if zero-extension is slow (more than one real instruction).
2434 On the ARM, it is more than one instruction only if not fetching from
2436 /* #define SLOW_ZERO_EXTEND */
2438 /* Nonzero if access to memory by bytes is slow and undesirable. */
2439 #define SLOW_BYTE_ACCESS 0
2441 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 1
2443 /* Immediate shift counts are truncated by the output routines (or was it
2444 the assembler?). Shift counts in a register are truncated by ARM. Note
2445 that the native compiler puts too large (> 32) immediate shift counts
2446 into a register and shifts by the register, letting the ARM decide what
2447 to do instead of doing that itself. */
2448 /* This is all wrong. Defining SHIFT_COUNT_TRUNCATED tells combine that
2449 code like (X << (Y % 32)) for register X, Y is equivalent to (X << Y).
2450 On the arm, Y in a register is used modulo 256 for the shift. Only for
2451 rotates is modulo 32 used. */
2452 /* #define SHIFT_COUNT_TRUNCATED 1 */
2454 /* All integers have the same format so truncation is easy. */
2455 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
2457 /* Calling from registers is a massive pain. */
2458 #define NO_FUNCTION_CSE 1
2460 /* Chars and shorts should be passed as ints. */
2461 #define PROMOTE_PROTOTYPES 1
2463 /* The machine modes of pointers and functions */
2464 #define Pmode SImode
2465 #define FUNCTION_MODE Pmode
2467 #define ARM_FRAME_RTX(X) \
2468 ( (X) == frame_pointer_rtx || (X) == stack_pointer_rtx \
2469 || (X) == arg_pointer_rtx)
2471 #define DEFAULT_RTX_COSTS(X, CODE, OUTER_CODE) \
2472 return arm_rtx_costs (X, CODE, OUTER_CODE);
2474 /* Moves to and from memory are quite expensive */
2475 #define MEMORY_MOVE_COST(M, CLASS, IN) \
2476 (TARGET_ARM ? 10 : \
2477 ((GET_MODE_SIZE (M) < 4 ? 8 : 2 * GET_MODE_SIZE (M)) \
2478 * (CLASS == LO_REGS ? 1 : 2)))
2480 /* All address computations that can be done are free, but rtx cost returns
2481 the same for practically all of them. So we weight the different types
2482 of address here in the order (most pref first):
2483 PRE/POST_INC/DEC, SHIFT or NON-INT sum, INT sum, REG, MEM or LABEL. */
2484 #define ARM_ADDRESS_COST(X) \
2485 (10 - ((GET_CODE (X) == MEM || GET_CODE (X) == LABEL_REF \
2486 || GET_CODE (X) == SYMBOL_REF) \
2488 : ((GET_CODE (X) == PRE_INC || GET_CODE (X) == PRE_DEC \
2489 || GET_CODE (X) == POST_INC || GET_CODE (X) == POST_DEC) \
2491 : (((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS) \
2492 ? 6 + (GET_CODE (XEXP (X, 1)) == CONST_INT ? 2 \
2493 : ((GET_RTX_CLASS (GET_CODE (XEXP (X, 0))) == '2' \
2494 || GET_RTX_CLASS (GET_CODE (XEXP (X, 0))) == 'c' \
2495 || GET_RTX_CLASS (GET_CODE (XEXP (X, 1))) == '2' \
2496 || GET_RTX_CLASS (GET_CODE (XEXP (X, 1))) == 'c') \
2500 #define THUMB_ADDRESS_COST(X) \
2501 ((GET_CODE (X) == REG \
2502 || (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
2503 && GET_CODE (XEXP (X, 1)) == CONST_INT)) \
2506 #define ADDRESS_COST(X) \
2507 (TARGET_ARM ? ARM_ADDRESS_COST (X) : THUMB_ADDRESS_COST (X))
2509 /* Try to generate sequences that don't involve branches, we can then use
2510 conditional instructions */
2511 #define BRANCH_COST \
2512 (TARGET_ARM ? 4 : (optimize > 1 ? 1 : 0))
2514 /* A C statement to update the variable COST based on the relationship
2515 between INSN that is dependent on DEP through dependence LINK. */
2516 #define ADJUST_COST(INSN, LINK, DEP, COST) \
2517 (COST) = arm_adjust_cost (INSN, LINK, DEP, COST)
2519 /* Position Independent Code. */
2520 /* We decide which register to use based on the compilation options and
2521 the assembler in use; this is more general than the APCS restriction of
2522 using sb (r9) all the time. */
2523 extern int arm_pic_register;
2525 /* Used when parsing command line option -mpic-register=. */
2526 extern const char * arm_pic_register_string;
2528 /* The register number of the register used to address a table of static
2529 data addresses in memory. */
2530 #define PIC_OFFSET_TABLE_REGNUM arm_pic_register
2532 #define FINALIZE_PIC arm_finalize_pic ()
2534 /* We can't directly access anything that contains a symbol,
2535 nor can we indirect via the constant pool. */
2536 #define LEGITIMATE_PIC_OPERAND_P(X) \
2537 ( ! symbol_mentioned_p (X) \
2538 && ! label_mentioned_p (X) \
2539 && (! CONSTANT_POOL_ADDRESS_P (X) \
2540 || ( ! symbol_mentioned_p (get_pool_constant (X)) \
2541 && ! label_mentioned_p (get_pool_constant (X)))))
2543 /* We need to know when we are making a constant pool; this determines
2544 whether data needs to be in the GOT or can be referenced via a GOT
2546 extern int making_const_table;
2548 /* If defined, a C expression whose value is nonzero if IDENTIFIER
2549 with arguments ARGS is a valid machine specific attribute for TYPE.
2550 The attributes in ATTRIBUTES have previously been assigned to TYPE. */
2551 #define VALID_MACHINE_TYPE_ATTRIBUTE(TYPE, ATTRIBUTES, NAME, ARGS) \
2552 (arm_valid_type_attribute_p (TYPE, ATTRIBUTES, NAME, ARGS))
2554 /* If defined, a C expression whose value is zero if the attributes on
2555 TYPE1 and TYPE2 are incompatible, one if they are compatible, and
2556 two if they are nearly compatible (which causes a warning to be
2558 #define COMP_TYPE_ATTRIBUTES(TYPE1, TYPE2) \
2559 (arm_comp_type_attributes (TYPE1, TYPE2))
2561 /* If defined, a C statement that assigns default attributes to newly
2563 #define SET_DEFAULT_TYPE_ATTRIBUTES(TYPE) \
2564 arm_set_default_type_attributes (TYPE)
2566 /* Handle pragmas for compatibility with Intel's compilers. */
2567 #define REGISTER_TARGET_PRAGMAS(PFILE) do { \
2568 cpp_register_pragma (PFILE, 0, "long_calls", arm_pr_long_calls); \
2569 cpp_register_pragma (PFILE, 0, "no_long_calls", arm_pr_no_long_calls); \
2570 cpp_register_pragma (PFILE, 0, "long_calls_off", arm_pr_long_calls_off); \
2573 /* Condition code information. */
2574 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
2575 return the mode to be used for the comparison.
2576 CCFPEmode should be used with floating inequalities,
2577 CCFPmode should be used with floating equalities.
2578 CC_NOOVmode should be used with SImode integer equalities.
2579 CC_Zmode should be used if only the Z flag is set correctly
2580 CCmode should be used otherwise. */
2582 #define EXTRA_CC_MODES \
2583 CC(CC_NOOVmode, "CC_NOOV") \
2584 CC(CC_Zmode, "CC_Z") \
2585 CC(CC_SWPmode, "CC_SWP") \
2586 CC(CCFPmode, "CCFP") \
2587 CC(CCFPEmode, "CCFPE") \
2588 CC(CC_DNEmode, "CC_DNE") \
2589 CC(CC_DEQmode, "CC_DEQ") \
2590 CC(CC_DLEmode, "CC_DLE") \
2591 CC(CC_DLTmode, "CC_DLT") \
2592 CC(CC_DGEmode, "CC_DGE") \
2593 CC(CC_DGTmode, "CC_DGT") \
2594 CC(CC_DLEUmode, "CC_DLEU") \
2595 CC(CC_DLTUmode, "CC_DLTU") \
2596 CC(CC_DGEUmode, "CC_DGEU") \
2597 CC(CC_DGTUmode, "CC_DGTU") \
2598 CC(CC_Cmode, "CC_C")
2600 #define SELECT_CC_MODE(OP, X, Y) arm_select_cc_mode (OP, X, Y)
2602 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode)
2604 #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) \
2607 if (GET_CODE (OP1) == CONST_INT \
2608 && ! (const_ok_for_arm (INTVAL (OP1)) \
2609 || (const_ok_for_arm (- INTVAL (OP1))))) \
2611 rtx const_op = OP1; \
2612 CODE = arm_canonicalize_comparison ((CODE), &const_op); \
2618 #define STORE_FLAG_VALUE 1
2622 /* Gcc puts the pool in the wrong place for ARM, since we can only
2623 load addresses a limited distance around the pc. We do some
2624 special munging to move the constant pool values to the correct
2625 point in the code. */
2626 #define MACHINE_DEPENDENT_REORG(INSN) \
2630 #define ASM_APP_OFF (TARGET_THUMB ? "\t.code\t16\n" : "")
2632 /* Output an internal label definition. */
2633 #ifndef ASM_OUTPUT_INTERNAL_LABEL
2634 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
2637 char * s = (char *) alloca (40 + strlen (PREFIX)); \
2639 if (arm_ccfsm_state == 3 && arm_target_label == (NUM) \
2640 && !strcmp (PREFIX, "L")) \
2642 arm_ccfsm_state = 0; \
2643 arm_target_insn = NULL; \
2645 ASM_GENERATE_INTERNAL_LABEL (s, (PREFIX), (NUM)); \
2646 ASM_OUTPUT_LABEL (STREAM, s); \
2651 /* Output a push or a pop instruction (only used when profiling). */
2652 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
2654 asm_fprintf (STREAM,"\tstmfd\t%r!,{%r}\n", \
2655 STACK_POINTER_REGNUM, REGNO); \
2657 asm_fprintf (STREAM, "\tpush {%r}\n", REGNO)
2660 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
2662 asm_fprintf (STREAM, "\tldmfd\t%r!,{%r}\n", \
2663 STACK_POINTER_REGNUM, REGNO); \
2665 asm_fprintf (STREAM, "\tpop {%r}\n", REGNO)
2667 /* This is how to output a label which precedes a jumptable. Since
2668 Thumb instructions are 2 bytes, we may need explicit alignment here. */
2669 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
2673 ASM_OUTPUT_ALIGN (FILE, 2); \
2674 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
2678 #define ARM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
2683 if (is_called_in_ARM_mode (DECL)) \
2684 fprintf (STREAM, "\t.code 32\n") ; \
2686 fprintf (STREAM, "\t.thumb_func\n") ; \
2688 if (TARGET_POKE_FUNCTION_NAME) \
2689 arm_poke_function_name (STREAM, (char *) NAME); \
2693 /* For aliases of functions we use .thumb_set instead. */
2694 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL1, DECL2) \
2697 char * LABEL1 = XSTR (XEXP (DECL_RTL (decl), 0), 0); \
2698 char * LABEL2 = IDENTIFIER_POINTER (DECL2); \
2700 if (TARGET_THUMB && TREE_CODE (DECL1) == FUNCTION_DECL) \
2702 fprintf (FILE, "\t.thumb_set "); \
2703 assemble_name (FILE, LABEL1); \
2704 fprintf (FILE, ","); \
2705 assemble_name (FILE, LABEL2); \
2706 fprintf (FILE, "\n"); \
2709 ASM_OUTPUT_DEF (FILE, LABEL1, LABEL2); \
2713 /* Target characters. */
2714 #define TARGET_BELL 007
2715 #define TARGET_BS 010
2716 #define TARGET_TAB 011
2717 #define TARGET_NEWLINE 012
2718 #define TARGET_VT 013
2719 #define TARGET_FF 014
2720 #define TARGET_CR 015
2722 /* Only perform branch elimination (by making instructions conditional) if
2723 we're optimising. Otherwise it's of no use anyway. */
2724 #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \
2725 if (TARGET_ARM && optimize) \
2726 arm_final_prescan_insn (INSN); \
2727 else if (TARGET_THUMB) \
2728 thumb_final_prescan_insn (INSN)
2730 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
2731 (CODE == '@' || CODE == '|' \
2732 || (TARGET_ARM && (CODE == '?')) \
2733 || (TARGET_THUMB && (CODE == '_')))
2735 /* Output an operand of an instruction. */
2736 #define PRINT_OPERAND(STREAM, X, CODE) \
2737 arm_print_operand (STREAM, X, CODE)
2739 /* Create an [unsigned] host sized integer declaration that
2740 avoids compiler warnings. */
2742 #define HOST_INT(x) ((signed HOST_WIDE_INT) x##UL)
2743 #define HOST_UINT(x) ((unsigned HOST_WIDE_INT) x##UL)
2745 #define HOST_INT(x) ((HOST_WIDE_INT) x)
2746 #define HOST_UINT(x) ((unsigned HOST_WIDE_INT) x)
2749 #define ARM_SIGN_EXTEND(x) ((HOST_WIDE_INT) \
2750 (HOST_BITS_PER_WIDE_INT <= 32 ? (x) \
2751 : (((x) & HOST_UINT (0xffffffff)) | \
2752 (((x) & HOST_UINT (0x80000000)) \
2753 ? ((~ HOST_INT (0)) \
2754 & ~ HOST_UINT(0xffffffff)) \
2757 /* Output the address of an operand. */
2758 #define ARM_PRINT_OPERAND_ADDRESS(STREAM, X) \
2760 int is_minus = GET_CODE (X) == MINUS; \
2762 if (GET_CODE (X) == REG) \
2763 asm_fprintf (STREAM, "[%r, #0]", REGNO (X)); \
2764 else if (GET_CODE (X) == PLUS || is_minus) \
2766 rtx base = XEXP (X, 0); \
2767 rtx index = XEXP (X, 1); \
2768 HOST_WIDE_INT offset = 0; \
2769 if (GET_CODE (base) != REG) \
2771 /* Ensure that BASE is a register */ \
2772 /* (one of them must be). */ \
2777 switch (GET_CODE (index)) \
2780 offset = INTVAL (index); \
2783 asm_fprintf (STREAM, "[%r, #%d]", \
2784 REGNO (base), offset); \
2788 asm_fprintf (STREAM, "[%r, %s%r]", \
2789 REGNO (base), is_minus ? "-" : "", \
2799 asm_fprintf (STREAM, "[%r, %s%r", \
2800 REGNO (base), is_minus ? "-" : "", \
2801 REGNO (XEXP (index, 0))); \
2802 arm_print_operand (STREAM, index, 'S'); \
2803 fputs ("]", STREAM); \
2811 else if ( GET_CODE (X) == PRE_INC || GET_CODE (X) == POST_INC\
2812 || GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_DEC)\
2814 extern int output_memory_reference_mode; \
2816 if (GET_CODE (XEXP (X, 0)) != REG) \
2819 if (GET_CODE (X) == PRE_DEC || GET_CODE (X) == PRE_INC) \
2820 asm_fprintf (STREAM, "[%r, #%s%d]!", \
2821 REGNO (XEXP (X, 0)), \
2822 GET_CODE (X) == PRE_DEC ? "-" : "", \
2823 GET_MODE_SIZE (output_memory_reference_mode));\
2825 asm_fprintf (STREAM, "[%r], #%s%d", \
2826 REGNO (XEXP (X, 0)), \
2827 GET_CODE (X) == POST_DEC ? "-" : "", \
2828 GET_MODE_SIZE (output_memory_reference_mode));\
2830 else output_addr_const (STREAM, X); \
2833 #define THUMB_PRINT_OPERAND_ADDRESS(STREAM, X) \
2835 if (GET_CODE (X) == REG) \
2836 asm_fprintf (STREAM, "[%r]", REGNO (X)); \
2837 else if (GET_CODE (X) == POST_INC) \
2838 asm_fprintf (STREAM, "%r!", REGNO (XEXP (X, 0))); \
2839 else if (GET_CODE (X) == PLUS) \
2841 if (GET_CODE (XEXP (X, 1)) == CONST_INT) \
2842 asm_fprintf (STREAM, "[%r, #%d]", \
2843 REGNO (XEXP (X, 0)), \
2844 (int) INTVAL (XEXP (X, 1))); \
2846 asm_fprintf (STREAM, "[%r, %r]", \
2847 REGNO (XEXP (X, 0)), \
2848 REGNO (XEXP (X, 1))); \
2851 output_addr_const (STREAM, X); \
2854 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
2856 ARM_PRINT_OPERAND_ADDRESS (STREAM, X) \
2858 THUMB_PRINT_OPERAND_ADDRESS (STREAM, X)
2860 /* Handles PIC addr specially */
2861 #define OUTPUT_INT_ADDR_CONST(STREAM, X) \
2863 if (flag_pic && GET_CODE (X) == CONST && is_pic (X)) \
2865 output_addr_const (STREAM, XEXP (XEXP (XEXP (X, 0), 0), 0)); \
2866 fputs (" - (", STREAM); \
2867 output_addr_const (STREAM, XEXP (XEXP (XEXP (X, 0), 1), 0)); \
2868 fputs (")", STREAM); \
2871 output_addr_const (STREAM, X); \
2873 /* Mark symbols as position independent. We only do this in the \
2874 .text segment, not in the .data segment. */ \
2875 if (NEED_GOT_RELOC && flag_pic && making_const_table && \
2876 (GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == LABEL_REF)) \
2878 if (GET_CODE (X) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (X)) \
2879 fprintf (STREAM, "(GOTOFF)"); \
2880 else if (GET_CODE (X) == LABEL_REF) \
2881 fprintf (STREAM, "(GOTOFF)"); \
2883 fprintf (STREAM, "(GOT)"); \
2887 /* Output code to add DELTA to the first argument, and then jump to FUNCTION.
2888 Used for C++ multiple inheritance. */
2889 #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
2892 int mi_delta = (DELTA); \
2893 const char * mi_op = mi_delta < 0 ? "sub" : "add"; \
2895 int this_regno = (aggregate_value_p (TREE_TYPE (TREE_TYPE (FUNCTION))) \
2898 mi_delta = - mi_delta; \
2899 while (mi_delta != 0) \
2901 if ((mi_delta & (3 << shift)) == 0) \
2905 asm_fprintf (FILE, "\t%s\t%r, %r, #%d\n", \
2906 mi_op, this_regno, this_regno, \
2907 mi_delta & (0xff << shift)); \
2908 mi_delta &= ~(0xff << shift); \
2912 fputs ("\tb\t", FILE); \
2913 assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0)); \
2914 if (NEED_PLT_RELOC) \
2915 fputs ("(PLT)", FILE); \
2916 fputc ('\n', FILE); \
2920 /* A C expression whose value is RTL representing the value of the return
2921 address for the frame COUNT steps up from the current frame. */
2923 #define RETURN_ADDR_RTX(COUNT, FRAME) \
2924 arm_return_addr (COUNT, FRAME)
2926 /* Mask of the bits in the PC that contain the real return address
2927 when running in 26-bit mode. */
2928 #define RETURN_ADDR_MASK26 (0x03fffffc)
2930 /* Pick up the return address upon entry to a procedure. Used for
2931 dwarf2 unwind information. This also enables the table driven
2933 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, LR_REGNUM)
2934 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (LR_REGNUM)
2936 /* Used to mask out junk bits from the return address, such as
2937 processor state, interrupt status, condition codes and the like. */
2938 #define MASK_RETURN_ADDR \
2939 /* If we are generating code for an ARM2/ARM3 machine or for an ARM6 \
2940 in 26 bit mode, the condition codes must be masked out of the \
2941 return address. This does not apply to ARM6 and later processors \
2942 when running in 32 bit mode. */ \
2943 ((!TARGET_APCS_32) ? (GEN_INT (RETURN_ADDR_MASK26)) \
2944 : (GEN_INT ((unsigned long)0xffffffff)))
2947 /* Define the codes that are matched by predicates in arm.c */
2948 #define PREDICATE_CODES \
2949 {"s_register_operand", {SUBREG, REG}}, \
2950 {"f_register_operand", {SUBREG, REG}}, \
2951 {"arm_add_operand", {SUBREG, REG, CONST_INT}}, \
2952 {"fpu_add_operand", {SUBREG, REG, CONST_DOUBLE}}, \
2953 {"fpu_rhs_operand", {SUBREG, REG, CONST_DOUBLE}}, \
2954 {"arm_rhs_operand", {SUBREG, REG, CONST_INT}}, \
2955 {"arm_not_operand", {SUBREG, REG, CONST_INT}}, \
2956 {"reg_or_int_operand", {SUBREG, REG, CONST_INT}}, \
2957 {"index_operand", {SUBREG, REG, CONST_INT}}, \
2958 {"thumb_cmp_operand", {SUBREG, REG, CONST_INT}}, \
2959 {"offsettable_memory_operand", {MEM}}, \
2960 {"bad_signed_byte_operand", {MEM}}, \
2961 {"alignable_memory_operand", {MEM}}, \
2962 {"shiftable_operator", {PLUS, MINUS, AND, IOR, XOR}}, \
2963 {"minmax_operator", {SMIN, SMAX, UMIN, UMAX}}, \
2964 {"shift_operator", {ASHIFT, ASHIFTRT, LSHIFTRT, ROTATERT, MULT}}, \
2965 {"di_operand", {SUBREG, REG, CONST_INT, CONST_DOUBLE, MEM}}, \
2966 {"nonimmediate_di_operand", {SUBREG, REG, MEM}}, \
2967 {"soft_df_operand", {SUBREG, REG, CONST_DOUBLE, MEM}}, \
2968 {"nonimmediate_soft_df_operand", {SUBREG, REG, MEM}}, \
2969 {"load_multiple_operation", {PARALLEL}}, \
2970 {"store_multiple_operation", {PARALLEL}}, \
2971 {"equality_operator", {EQ, NE}}, \
2972 {"arm_comparison_operator", {EQ, NE, LE, LT, GE, GT, GEU, GTU, LEU, \
2973 LTU, UNORDERED, ORDERED, UNLT, UNLE, \
2975 {"arm_rhsm_operand", {SUBREG, REG, CONST_INT, MEM}}, \
2976 {"const_shift_operand", {CONST_INT}}, \
2977 {"multi_register_push", {PARALLEL}}, \
2978 {"cc_register", {REG}}, \
2979 {"logical_binary_operator", {AND, IOR, XOR}}, \
2980 {"dominant_cc_register", {REG}},
2982 /* Define this if you have special predicates that know special things
2983 about modes. Genrecog will warn about certain forms of
2984 match_operand without a mode; if the operand predicate is listed in
2985 SPECIAL_MODE_PREDICATES, the warning will be suppressed. */
2986 #define SPECIAL_MODE_PREDICATES \
2987 "cc_register", "dominant_cc_register",
2992 ARM_BUILTIN_PREFETCH,
2996 #define MD_INIT_BUILTINS \
2999 arm_init_builtins (); \
3003 #define MD_EXPAND_BUILTIN(EXP, TARGET, SUBTARGET, MODE, IGNORE) \
3004 arm_expand_builtin ((EXP), (TARGET), (SUBTARGET), (MODE), (IGNORE))
3005 #endif /* __ARM_H__ */
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