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1 /* Definitions of target machine for GNU compiler, for ARM with a.out
2 Copyright (C) 1995-2024 Free Software Foundation, Inc.
3 Contributed by Richard Earnshaw (rearnsha@armltd.co.uk).
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published
9 by the Free Software Foundation; either version 3, or (at your
10 option) any later version.
12 GCC is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
30 #define ASM_APP_OFF ""
33 /* Switch to the text or data segment. */
34 #define TEXT_SECTION_ASM_OP "\t.text"
35 #define DATA_SECTION_ASM_OP "\t.data"
36 #define BSS_SECTION_ASM_OP "\t.bss"
38 /* Note: If USER_LABEL_PREFIX or LOCAL_LABEL_PREFIX are changed,
39 make sure that this change is reflected in the function
40 coff_arm_is_local_label_name() in bfd/coff-arm.c. */
41 #ifndef REGISTER_PREFIX
42 #define REGISTER_PREFIX ""
45 #ifndef USER_LABEL_PREFIX
46 #define USER_LABEL_PREFIX "_"
49 #ifndef LOCAL_LABEL_PREFIX
50 #define LOCAL_LABEL_PREFIX ""
53 /* The assembler's names for the registers. Note that the ?xx registers are
54 there so that VFPv3/NEON registers D16-D31 have the same spacing as D0-D15
55 (each of which is overlaid on two S registers), although there are no
56 actual single-precision registers which correspond to D16-D31. New register
57 p0 is added which is used for MVE predicated cases. */
59 #ifndef REGISTER_NAMES
60 #define REGISTER_NAMES \
62 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
63 "r8", "r9", "r10", "fp", "ip", "sp", "lr", "pc", \
64 "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", \
65 "s8", "s9", "s10", "s11", "s12", "s13", "s14", "s15", \
66 "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23", \
67 "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31", \
68 "d16", "?16", "d17", "?17", "d18", "?18", "d19", "?19", \
69 "d20", "?20", "d21", "?21", "d22", "?22", "d23", "?23", \
70 "d24", "?24", "d25", "?25", "d26", "?26", "d27", "?27", \
71 "d28", "?28", "d29", "?29", "d30", "?30", "d31", "?31", \
72 "wr0", "wr1", "wr2", "wr3", \
73 "wr4", "wr5", "wr6", "wr7", \
74 "wr8", "wr9", "wr10", "wr11", \
75 "wr12", "wr13", "wr14", "wr15", \
76 "wcgr0", "wcgr1", "wcgr2", "wcgr3", \
77 "cc", "vfpcc", "sfp", "afp", "apsrq", "apsrge", "p0", \
82 #ifndef ADDITIONAL_REGISTER_NAMES
83 #define ADDITIONAL_REGISTER_NAMES \
95 {"rfp", 9}, /* Historical. */ \
96 {"sb", 9}, /* Historical. */ \
98 {"sl", 10}, /* Historical. */ \
99 {"r11", 11}, /* fp */ \
100 {"r12", 12}, /* ip */ \
101 {"r13", 13}, /* sp */ \
102 {"r14", 14}, /* lr */ \
103 {"r15", 15} /* pc */ \
107 #ifndef OVERLAPPING_REGISTER_NAMES
108 #define OVERLAPPING_REGISTER_NAMES \
110 {"d0", FIRST_VFP_REGNUM + 0, 2}, \
111 {"d1", FIRST_VFP_REGNUM + 2, 2}, \
112 {"d2", FIRST_VFP_REGNUM + 4, 2}, \
113 {"d3", FIRST_VFP_REGNUM + 6, 2}, \
114 {"d4", FIRST_VFP_REGNUM + 8, 2}, \
115 {"d5", FIRST_VFP_REGNUM + 10, 2}, \
116 {"d6", FIRST_VFP_REGNUM + 12, 2}, \
117 {"d7", FIRST_VFP_REGNUM + 14, 2}, \
118 {"d8", FIRST_VFP_REGNUM + 16, 2}, \
119 {"d9", FIRST_VFP_REGNUM + 18, 2}, \
120 {"d10", FIRST_VFP_REGNUM + 20, 2}, \
121 {"d11", FIRST_VFP_REGNUM + 22, 2}, \
122 {"d12", FIRST_VFP_REGNUM + 24, 2}, \
123 {"d13", FIRST_VFP_REGNUM + 26, 2}, \
124 {"d14", FIRST_VFP_REGNUM + 28, 2}, \
125 {"d15", FIRST_VFP_REGNUM + 30, 2}, \
126 {"q0", FIRST_VFP_REGNUM + 0, 4}, \
127 {"q1", FIRST_VFP_REGNUM + 4, 4}, \
128 {"q2", FIRST_VFP_REGNUM + 8, 4}, \
129 {"q3", FIRST_VFP_REGNUM + 12, 4}, \
130 {"q4", FIRST_VFP_REGNUM + 16, 4}, \
131 {"q5", FIRST_VFP_REGNUM + 20, 4}, \
132 {"q6", FIRST_VFP_REGNUM + 24, 4}, \
133 {"q7", FIRST_VFP_REGNUM + 28, 4}, \
134 {"q8", FIRST_VFP_REGNUM + 32, 4}, \
135 {"q9", FIRST_VFP_REGNUM + 36, 4}, \
136 {"q10", FIRST_VFP_REGNUM + 40, 4}, \
137 {"q11", FIRST_VFP_REGNUM + 44, 4}, \
138 {"q12", FIRST_VFP_REGNUM + 48, 4}, \
139 {"q13", FIRST_VFP_REGNUM + 52, 4}, \
140 {"q14", FIRST_VFP_REGNUM + 56, 4}, \
141 {"q15", FIRST_VFP_REGNUM + 60, 4} \
145 #ifndef NO_DOLLAR_IN_LABEL
146 #define NO_DOLLAR_IN_LABEL 1
149 /* Output a function label definition. */
150 #ifndef ASM_DECLARE_FUNCTION_NAME
151 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
154 ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL); \
155 ASM_OUTPUT_LABEL (STREAM, NAME); \
160 /* Globalizing directive for a label. */
161 #define GLOBAL_ASM_OP "\t.global\t"
163 /* Make an internal label into a string. */
164 #ifndef ASM_GENERATE_INTERNAL_LABEL
165 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM) \
166 sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
169 /* Output an element of a dispatch table. */
170 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
173 gcc_assert (!TARGET_THUMB2); \
174 asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE); \
179 /* Thumb-2 always uses addr_diff_elf so that the Table Branch instructions
180 can be used. For non-pic code where the offsets do not suitable for
181 TBB/TBH the elements are output as absolute labels. */
182 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
187 switch (GET_MODE (body)) \
190 asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LLrtx%d-4)/4\n", \
194 asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LLrtx%d-4)/4\n", \
199 asm_fprintf (STREAM, "\t.word\t%LL%d-%LLrtx%d-4\n", \
202 asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE); \
205 gcc_unreachable (); \
208 else if (TARGET_THUMB1) \
210 if (flag_pic || optimize_size) \
212 switch (GET_MODE(body)) \
215 asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n", \
218 case E_HImode: /* TBH */ \
219 asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n", \
223 asm_fprintf (STREAM, "\t.word\t%LL%d-%LL%d\n", \
231 asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE); \
235 switch (GET_MODE(body)) \
237 case E_QImode: /* TBB */ \
238 asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n", \
241 case E_HImode: /* TBH */ \
242 asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n", \
247 asm_fprintf (STREAM, "\t.word\t%LL%d+1-%LL%d\n", VALUE, REL); \
249 asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE); \
259 #undef ASM_OUTPUT_ASCII
260 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \
261 output_ascii_pseudo_op (STREAM, (const unsigned char *) (PTR), LEN)
263 /* Output a gap. In fact we fill it with nulls. */
264 #undef ASM_OUTPUT_SKIP
265 #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
266 fprintf (STREAM, "\t.space\t%d\n", (int) (NBYTES))
268 /* Align output to a power of two. Horrible /bin/as. */
269 #ifndef ASM_OUTPUT_ALIGN
270 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
273 int amount = 1 << (POWER); \
276 fprintf (STREAM, "\t.even\n"); \
277 else if (amount != 1) \
278 fprintf (STREAM, "\t.align\t%d\n", amount - 4); \
283 /* Output a common block. */
284 #ifndef ASM_OUTPUT_COMMON
285 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
288 fprintf (STREAM, "\t.comm\t"); \
289 assemble_name (STREAM, NAME); \
290 asm_fprintf (STREAM, ", %d\t%@ %d\n", \
291 (int)(ROUNDED), (int)(SIZE)); \
296 /* Output a local common block. /bin/as can't do this, so hack a
297 `.space' into the bss segment. Note that this is *bad* practice,
298 which is guaranteed NOT to work since it doesn't define STATIC
299 COMMON space but merely STATIC BSS space. */
300 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
301 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN) \
304 switch_to_section (bss_section); \
305 ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT)); \
306 ASM_OUTPUT_LABEL (STREAM, NAME); \
307 fprintf (STREAM, "\t.space\t%d\n", (int)(SIZE)); \
312 /* Output a zero-initialized block. */
313 #ifndef ASM_OUTPUT_ALIGNED_BSS
314 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \
315 asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN)
318 #ifndef ASM_COMMENT_START
319 #define ASM_COMMENT_START "@"
322 /* This works for GAS and some other assemblers. */
323 #define SET_ASM_OP "\t.set\t"