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1 /* Definitions of target machine for GNU compiler, for ARM with a.out
2 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2004, 2007
3 Free Software Foundation, Inc.
4 Contributed by Richard Earnshaw (rearnsha@armltd.co.uk).
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published
10 by the Free Software Foundation; either version 3, or (at your
11 option) any later version.
13 GCC is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
26 #define ASM_APP_OFF ""
29 /* Switch to the text or data segment. */
30 #define TEXT_SECTION_ASM_OP "\t.text"
31 #define DATA_SECTION_ASM_OP "\t.data"
32 #define BSS_SECTION_ASM_OP "\t.bss"
34 /* Note: If USER_LABEL_PREFIX or LOCAL_LABEL_PREFIX are changed,
35 make sure that this change is reflected in the function
36 coff_arm_is_local_label_name() in bfd/coff-arm.c. */
37 #ifndef REGISTER_PREFIX
38 #define REGISTER_PREFIX ""
41 #ifndef USER_LABEL_PREFIX
42 #define USER_LABEL_PREFIX "_"
45 #ifndef LOCAL_LABEL_PREFIX
46 #define LOCAL_LABEL_PREFIX ""
49 /* The assembler's names for the registers. Note that the ?xx registers are
50 there so that VFPv3/NEON registers D16-D31 have the same spacing as D0-D15
51 (each of which is overlaid on two S registers), although there are no
52 actual single-precision registers which correspond to D16-D31. */
53 #ifndef REGISTER_NAMES
54 #define REGISTER_NAMES \
56 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
57 "r8", "r9", "sl", "fp", "ip", "sp", "lr", "pc", \
58 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
60 "mv0", "mv1", "mv2", "mv3", \
61 "mv4", "mv5", "mv6", "mv7", \
62 "mv8", "mv9", "mv10", "mv11", \
63 "mv12", "mv13", "mv14", "mv15", \
64 "wcgr0", "wcgr1", "wcgr2", "wcgr3", \
65 "wr0", "wr1", "wr2", "wr3", \
66 "wr4", "wr5", "wr6", "wr7", \
67 "wr8", "wr9", "wr10", "wr11", \
68 "wr12", "wr13", "wr14", "wr15", \
69 "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", \
70 "s8", "s9", "s10", "s11", "s12", "s13", "s14", "s15", \
71 "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23", \
72 "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31", \
73 "d16", "?16", "d17", "?17", "d18", "?18", "d19", "?19", \
74 "d20", "?20", "d21", "?21", "d22", "?22", "d23", "?23", \
75 "d24", "?24", "d25", "?25", "d26", "?26", "d27", "?27", \
76 "d28", "?28", "d29", "?29", "d30", "?30", "d31", "?31", \
81 #ifndef ADDITIONAL_REGISTER_NAMES
82 #define ADDITIONAL_REGISTER_NAMES \
94 {"rfp", 9}, /* Gcc used to call it this */ \
97 {"r10", 10}, /* sl */ \
98 {"r11", 11}, /* fp */ \
99 {"r12", 12}, /* ip */ \
100 {"r13", 13}, /* sp */ \
101 {"r14", 14}, /* lr */ \
102 {"r15", 15}, /* pc */ \
167 {"d0", 63}, {"q0", 63}, \
169 {"d2", 67}, {"q1", 67}, \
171 {"d4", 71}, {"q2", 71}, \
173 {"d6", 75}, {"q3", 75}, \
175 {"d8", 79}, {"q4", 79}, \
177 {"d10", 83}, {"q5", 83}, \
179 {"d12", 87}, {"q6", 87}, \
181 {"d14", 91}, {"q7", 91}, \
194 /* Arm Assembler barfs on dollars. */
195 #define DOLLARS_IN_IDENTIFIERS 0
197 #ifndef NO_DOLLAR_IN_LABEL
198 #define NO_DOLLAR_IN_LABEL 1
201 /* Generate DBX debugging information. riscix.h will undefine this because
202 the native assembler does not support stabs. */
203 #define DBX_DEBUGGING_INFO 1
205 /* Acorn dbx moans about continuation chars, so don't use any. */
206 #ifndef DBX_CONTIN_LENGTH
207 #define DBX_CONTIN_LENGTH 0
210 /* Output a function label definition. */
211 #ifndef ASM_DECLARE_FUNCTION_NAME
212 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
215 ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL); \
216 ASM_OUTPUT_LABEL (STREAM, NAME); \
221 /* Globalizing directive for a label. */
222 #define GLOBAL_ASM_OP "\t.global\t"
224 /* Make an internal label into a string. */
225 #ifndef ASM_GENERATE_INTERNAL_LABEL
226 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM) \
227 sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
230 /* Output an element of a dispatch table. */
231 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
234 gcc_assert (!TARGET_THUMB2); \
235 asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE); \
240 /* Thumb-2 always uses addr_diff_elf so that the Table Branch instructions
241 can be used. For non-pic code where the offsets do not suitable for
242 TBB/TBH the elements are output as absolute labels. */
243 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
247 asm_fprintf (STREAM, "\tb\t%LL%d\n", VALUE); \
248 else if (TARGET_THUMB1) \
249 asm_fprintf (STREAM, "\t.word\t%LL%d-%LL%d\n", VALUE, REL); \
252 switch (GET_MODE(body)) \
254 case QImode: /* TBB */ \
255 asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n", \
258 case HImode: /* TBH */ \
259 asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n", \
264 asm_fprintf (STREAM, "\t.word\t%LL%d+1-%LL%d\n", VALUE, REL); \
266 asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE); \
276 #undef ASM_OUTPUT_ASCII
277 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \
278 output_ascii_pseudo_op (STREAM, (const unsigned char *) (PTR), LEN)
280 /* Output a gap. In fact we fill it with nulls. */
281 #undef ASM_OUTPUT_SKIP
282 #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
283 fprintf (STREAM, "\t.space\t%d\n", (int) (NBYTES))
285 /* Align output to a power of two. Horrible /bin/as. */
286 #ifndef ASM_OUTPUT_ALIGN
287 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
290 register int amount = 1 << (POWER); \
293 fprintf (STREAM, "\t.even\n"); \
294 else if (amount != 1) \
295 fprintf (STREAM, "\t.align\t%d\n", amount - 4); \
300 /* Output a common block. */
301 #ifndef ASM_OUTPUT_COMMON
302 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
305 fprintf (STREAM, "\t.comm\t"); \
306 assemble_name (STREAM, NAME); \
307 asm_fprintf (STREAM, ", %d\t%@ %d\n", \
308 (int)(ROUNDED), (int)(SIZE)); \
313 /* Output a local common block. /bin/as can't do this, so hack a
314 `.space' into the bss segment. Note that this is *bad* practice,
315 which is guaranteed NOT to work since it doesn't define STATIC
316 COMMON space but merely STATIC BSS space. */
317 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
318 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN) \
321 switch_to_section (bss_section); \
322 ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT)); \
323 ASM_OUTPUT_LABEL (STREAM, NAME); \
324 fprintf (STREAM, "\t.space\t%d\n", (int)(SIZE)); \
329 /* Output a zero-initialized block. */
330 #ifndef ASM_OUTPUT_ALIGNED_BSS
331 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \
332 asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN)
335 /* Output a #ident directive. */
336 #ifndef ASM_OUTPUT_IDENT
337 #define ASM_OUTPUT_IDENT(STREAM,STRING) \
338 asm_fprintf (STREAM, "%@ - - - ident %s\n", STRING)
341 #ifndef ASM_COMMENT_START
342 #define ASM_COMMENT_START "@"
345 /* This works for GAS and some other assemblers. */
346 #define SET_ASM_OP "\t.set\t"