1 /* Definitions of target machine for GNU compiler, for ARM with a.out 2 Copyright (C) 1995-2013 Free Software Foundation, Inc. 3 Contributed by Richard Earnshaw (rearnsha@armltd.co.uk). 4 5 This file is part of GCC. 6 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. 11 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. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 #ifndef ASM_APP_ON 22 #define ASM_APP_ON "" 23 #endif 24 #ifndef ASM_APP_OFF 25 #define ASM_APP_OFF "" 26 #endif 27 28 /* Switch to the text or data segment. */ 29 #define TEXT_SECTION_ASM_OP "\t.text" 30 #define DATA_SECTION_ASM_OP "\t.data" 31 #define BSS_SECTION_ASM_OP "\t.bss" 32 33 /* Note: If USER_LABEL_PREFIX or LOCAL_LABEL_PREFIX are changed, 34 make sure that this change is reflected in the function 35 coff_arm_is_local_label_name() in bfd/coff-arm.c. */ 36 #ifndef REGISTER_PREFIX 37 #define REGISTER_PREFIX "" 38 #endif 39 40 #ifndef USER_LABEL_PREFIX 41 #define USER_LABEL_PREFIX "_" 42 #endif 43 44 #ifndef LOCAL_LABEL_PREFIX 45 #define LOCAL_LABEL_PREFIX "" 46 #endif 47 48 /* The assembler's names for the registers. Note that the ?xx registers are 49 there so that VFPv3/NEON registers D16-D31 have the same spacing as D0-D15 50 (each of which is overlaid on two S registers), although there are no 51 actual single-precision registers which correspond to D16-D31. */ 52 #ifndef REGISTER_NAMES 53 #define REGISTER_NAMES \ 54 { \ 55 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ 56 "r8", "r9", "r10", "fp", "ip", "sp", "lr", "pc", \ 57 "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", \ 58 "s8", "s9", "s10", "s11", "s12", "s13", "s14", "s15", \ 59 "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23", \ 60 "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31", \ 61 "d16", "?16", "d17", "?17", "d18", "?18", "d19", "?19", \ 62 "d20", "?20", "d21", "?21", "d22", "?22", "d23", "?23", \ 63 "d24", "?24", "d25", "?25", "d26", "?26", "d27", "?27", \ 64 "d28", "?28", "d29", "?29", "d30", "?30", "d31", "?31", \ 65 "wr0", "wr1", "wr2", "wr3", \ 66 "wr4", "wr5", "wr6", "wr7", \ 67 "wr8", "wr9", "wr10", "wr11", \ 68 "wr12", "wr13", "wr14", "wr15", \ 69 "wcgr0", "wcgr1", "wcgr2", "wcgr3", \ 70 "cc", "vfpcc", "sfp", "afp" \ 71 } 72 #endif 73 74 #ifndef ADDITIONAL_REGISTER_NAMES 75 #define ADDITIONAL_REGISTER_NAMES \ 76 { \ 77 {"a1", 0}, \ 78 {"a2", 1}, \ 79 {"a3", 2}, \ 80 {"a4", 3}, \ 81 {"v1", 4}, \ 82 {"v2", 5}, \ 83 {"v3", 6}, \ 84 {"v4", 7}, \ 85 {"v5", 8}, \ 86 {"v6", 9}, \ 87 {"rfp", 9}, /* Historical. */ \ 88 {"sb", 9}, /* Historical. */ \ 89 {"v7", 10}, \ 90 {"sl", 10}, /* Historical. */ \ 91 {"r11", 11}, /* fp */ \ 92 {"r12", 12}, /* ip */ \ 93 {"r13", 13}, /* sp */ \ 94 {"r14", 14}, /* lr */ \ 95 {"r15", 15} /* pc */ \ 96 } 97 #endif 98 99 #ifndef OVERLAPPING_REGISTER_NAMES 100 #define OVERLAPPING_REGISTER_NAMES \ 101 { \ 102 {"d0", FIRST_VFP_REGNUM + 0, 2}, \ 103 {"d1", FIRST_VFP_REGNUM + 2, 2}, \ 104 {"d2", FIRST_VFP_REGNUM + 4, 2}, \ 105 {"d3", FIRST_VFP_REGNUM + 6, 2}, \ 106 {"d4", FIRST_VFP_REGNUM + 8, 2}, \ 107 {"d5", FIRST_VFP_REGNUM + 10, 2}, \ 108 {"d6", FIRST_VFP_REGNUM + 12, 2}, \ 109 {"d7", FIRST_VFP_REGNUM + 14, 2}, \ 110 {"d8", FIRST_VFP_REGNUM + 16, 2}, \ 111 {"d9", FIRST_VFP_REGNUM + 18, 2}, \ 112 {"d10", FIRST_VFP_REGNUM + 20, 2}, \ 113 {"d11", FIRST_VFP_REGNUM + 22, 2}, \ 114 {"d12", FIRST_VFP_REGNUM + 24, 2}, \ 115 {"d13", FIRST_VFP_REGNUM + 26, 2}, \ 116 {"d14", FIRST_VFP_REGNUM + 28, 2}, \ 117 {"d15", FIRST_VFP_REGNUM + 30, 2}, \ 118 {"q0", FIRST_VFP_REGNUM + 0, 4}, \ 119 {"q1", FIRST_VFP_REGNUM + 4, 4}, \ 120 {"q2", FIRST_VFP_REGNUM + 8, 4}, \ 121 {"q3", FIRST_VFP_REGNUM + 12, 4}, \ 122 {"q4", FIRST_VFP_REGNUM + 16, 4}, \ 123 {"q5", FIRST_VFP_REGNUM + 20, 4}, \ 124 {"q6", FIRST_VFP_REGNUM + 24, 4}, \ 125 {"q7", FIRST_VFP_REGNUM + 28, 4}, \ 126 {"q8", FIRST_VFP_REGNUM + 32, 4}, \ 127 {"q9", FIRST_VFP_REGNUM + 36, 4}, \ 128 {"q10", FIRST_VFP_REGNUM + 40, 4}, \ 129 {"q11", FIRST_VFP_REGNUM + 44, 4}, \ 130 {"q12", FIRST_VFP_REGNUM + 48, 4}, \ 131 {"q13", FIRST_VFP_REGNUM + 52, 4}, \ 132 {"q14", FIRST_VFP_REGNUM + 56, 4}, \ 133 {"q15", FIRST_VFP_REGNUM + 60, 4} \ 134 } 135 #endif 136 137 #ifndef NO_DOLLAR_IN_LABEL 138 #define NO_DOLLAR_IN_LABEL 1 139 #endif 140 141 /* Generate DBX debugging information. riscix.h will undefine this because 142 the native assembler does not support stabs. */ 143 #define DBX_DEBUGGING_INFO 1 144 145 /* Acorn dbx moans about continuation chars, so don't use any. */ 146 #ifndef DBX_CONTIN_LENGTH 147 #define DBX_CONTIN_LENGTH 0 148 #endif 149 150 /* Output a function label definition. */ 151 #ifndef ASM_DECLARE_FUNCTION_NAME 152 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \ 153 do \ 154 { \ 155 ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL); \ 156 ASM_OUTPUT_LABEL (STREAM, NAME); \ 157 } \ 158 while (0) 159 #endif 160 161 /* Globalizing directive for a label. */ 162 #define GLOBAL_ASM_OP "\t.global\t" 163 164 /* Make an internal label into a string. */ 165 #ifndef ASM_GENERATE_INTERNAL_LABEL 166 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM) \ 167 sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM)) 168 #endif 169 170 /* Output an element of a dispatch table. */ 171 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \ 172 do \ 173 { \ 174 gcc_assert (!TARGET_THUMB2); \ 175 asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE); \ 176 } \ 177 while (0) 178 179 180 /* Thumb-2 always uses addr_diff_elf so that the Table Branch instructions 181 can be used. For non-pic code where the offsets do not suitable for 182 TBB/TBH the elements are output as absolute labels. */ 183 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \ 184 do \ 185 { \ 186 if (TARGET_ARM) \ 187 asm_fprintf (STREAM, "\tb\t%LL%d\n", VALUE); \ 188 else if (TARGET_THUMB1) \ 189 { \ 190 if (flag_pic || optimize_size) \ 191 { \ 192 switch (GET_MODE(body)) \ 193 { \ 194 case QImode: \ 195 asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n", \ 196 VALUE, REL); \ 197 break; \ 198 case HImode: /* TBH */ \ 199 asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n", \ 200 VALUE, REL); \ 201 break; \ 202 case SImode: \ 203 asm_fprintf (STREAM, "\t.word\t%LL%d-%LL%d\n", \ 204 VALUE, REL); \ 205 break; \ 206 default: \ 207 gcc_unreachable(); \ 208 } \ 209 } \ 210 else \ 211 asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE); \ 212 } \ 213 else /* Thumb-2 */ \ 214 { \ 215 switch (GET_MODE(body)) \ 216 { \ 217 case QImode: /* TBB */ \ 218 asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n", \ 219 VALUE, REL); \ 220 break; \ 221 case HImode: /* TBH */ \ 222 asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n", \ 223 VALUE, REL); \ 224 break; \ 225 case SImode: \ 226 if (flag_pic) \ 227 asm_fprintf (STREAM, "\t.word\t%LL%d+1-%LL%d\n", VALUE, REL); \ 228 else \ 229 asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE); \ 230 break; \ 231 default: \ 232 gcc_unreachable(); \ 233 } \ 234 } \ 235 } \ 236 while (0) 237 238 239 #undef ASM_OUTPUT_ASCII 240 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \ 241 output_ascii_pseudo_op (STREAM, (const unsigned char *) (PTR), LEN) 242 243 /* Output a gap. In fact we fill it with nulls. */ 244 #undef ASM_OUTPUT_SKIP 245 #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \ 246 fprintf (STREAM, "\t.space\t%d\n", (int) (NBYTES)) 247 248 /* Align output to a power of two. Horrible /bin/as. */ 249 #ifndef ASM_OUTPUT_ALIGN 250 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \ 251 do \ 252 { \ 253 register int amount = 1 << (POWER); \ 254 \ 255 if (amount == 2) \ 256 fprintf (STREAM, "\t.even\n"); \ 257 else if (amount != 1) \ 258 fprintf (STREAM, "\t.align\t%d\n", amount - 4); \ 259 } \ 260 while (0) 261 #endif 262 263 /* Output a common block. */ 264 #ifndef ASM_OUTPUT_COMMON 265 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \ 266 do \ 267 { \ 268 fprintf (STREAM, "\t.comm\t"); \ 269 assemble_name (STREAM, NAME); \ 270 asm_fprintf (STREAM, ", %d\t%@ %d\n", \ 271 (int)(ROUNDED), (int)(SIZE)); \ 272 } \ 273 while (0) 274 #endif 275 276 /* Output a local common block. /bin/as can't do this, so hack a 277 `.space' into the bss segment. Note that this is *bad* practice, 278 which is guaranteed NOT to work since it doesn't define STATIC 279 COMMON space but merely STATIC BSS space. */ 280 #ifndef ASM_OUTPUT_ALIGNED_LOCAL 281 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN) \ 282 do \ 283 { \ 284 switch_to_section (bss_section); \ 285 ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT)); \ 286 ASM_OUTPUT_LABEL (STREAM, NAME); \ 287 fprintf (STREAM, "\t.space\t%d\n", (int)(SIZE)); \ 288 } \ 289 while (0) 290 #endif 291 292 /* Output a zero-initialized block. */ 293 #ifndef ASM_OUTPUT_ALIGNED_BSS 294 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \ 295 asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN) 296 #endif 297 298 #ifndef ASM_COMMENT_START 299 #define ASM_COMMENT_START "@" 300 #endif 301 302 /* This works for GAS and some other assemblers. */ 303 #define SET_ASM_OP "\t.set\t" 304