| 1 | /* |
| 2 | * Copyright (c) 2008 Mans Rullgard <mans@mansr.com> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include "config.h" |
| 22 | |
| 23 | #ifdef __ELF__ |
| 24 | # define ELF |
| 25 | #else |
| 26 | # define ELF @ |
| 27 | #endif |
| 28 | |
| 29 | #if CONFIG_THUMB |
| 30 | # define A @ |
| 31 | # define T |
| 32 | #else |
| 33 | # define A |
| 34 | # define T @ |
| 35 | #endif |
| 36 | |
| 37 | #if HAVE_AS_FUNC |
| 38 | # define FUNC |
| 39 | #else |
| 40 | # define FUNC @ |
| 41 | #endif |
| 42 | |
| 43 | #if HAVE_NEON |
| 44 | .arch armv7-a |
| 45 | #elif HAVE_ARMV6T2 |
| 46 | .arch armv6t2 |
| 47 | #elif HAVE_ARMV6 |
| 48 | .arch armv6 |
| 49 | #elif HAVE_ARMV5TE |
| 50 | .arch armv5te |
| 51 | #endif |
| 52 | |
| 53 | #if HAVE_NEON |
| 54 | .fpu neon |
| 55 | #elif HAVE_VFP |
| 56 | .fpu vfp |
| 57 | #endif |
| 58 | |
| 59 | .syntax unified |
| 60 | T .thumb |
| 61 | ELF .eabi_attribute 25, 1 @ Tag_ABI_align_preserved |
| 62 | ELF .section .note.GNU-stack,"",%progbits @ Mark stack as non-executable |
| 63 | |
| 64 | .macro function name, export=0, align=2 |
| 65 | .set .Lpic_idx, 0 |
| 66 | .set .Lpic_gp, 0 |
| 67 | .macro endfunc |
| 68 | .if .Lpic_idx |
| 69 | .align 2 |
| 70 | .altmacro |
| 71 | put_pic %(.Lpic_idx - 1) |
| 72 | .noaltmacro |
| 73 | .endif |
| 74 | ELF .size \name, . - \name |
| 75 | FUNC .endfunc |
| 76 | .purgem endfunc |
| 77 | .endm |
| 78 | .text |
| 79 | .align \align |
| 80 | .if \export |
| 81 | .global EXTERN_ASM\name |
| 82 | ELF .type EXTERN_ASM\name, %function |
| 83 | FUNC .func EXTERN_ASM\name |
| 84 | EXTERN_ASM\name: |
| 85 | .else |
| 86 | ELF .type \name, %function |
| 87 | FUNC .func \name |
| 88 | \name: |
| 89 | .endif |
| 90 | .endm |
| 91 | |
| 92 | .macro const name, align=2 |
| 93 | .macro endconst |
| 94 | ELF .size \name, . - \name |
| 95 | .purgem endconst |
| 96 | .endm |
| 97 | .section .rodata |
| 98 | .align \align |
| 99 | \name: |
| 100 | .endm |
| 101 | |
| 102 | #if !HAVE_ARMV6T2_EXTERNAL |
| 103 | .macro movw rd, val |
| 104 | mov \rd, \val & 255 |
| 105 | orr \rd, \val & ~255 |
| 106 | .endm |
| 107 | #endif |
| 108 | |
| 109 | .macro mov32 rd, val |
| 110 | #if HAVE_ARMV6T2_EXTERNAL |
| 111 | movw \rd, #(\val) & 0xffff |
| 112 | .if (\val) >> 16 |
| 113 | movt \rd, #(\val) >> 16 |
| 114 | .endif |
| 115 | #else |
| 116 | ldr \rd, =\val |
| 117 | #endif |
| 118 | .endm |
| 119 | |
| 120 | .macro put_pic num |
| 121 | put_pic_\num |
| 122 | .endm |
| 123 | |
| 124 | .macro do_def_pic num, val, label |
| 125 | .macro put_pic_\num |
| 126 | .if \num |
| 127 | .altmacro |
| 128 | put_pic %(\num - 1) |
| 129 | .noaltmacro |
| 130 | .endif |
| 131 | \label: .word \val |
| 132 | .purgem put_pic_\num |
| 133 | .endm |
| 134 | .endm |
| 135 | |
| 136 | .macro def_pic val, label |
| 137 | .altmacro |
| 138 | do_def_pic %.Lpic_idx, \val, \label |
| 139 | .noaltmacro |
| 140 | .set .Lpic_idx, .Lpic_idx + 1 |
| 141 | .endm |
| 142 | |
| 143 | .macro ldpic rd, val, indir=0 |
| 144 | ldr \rd, .Lpicoff\@ |
| 145 | .Lpic\@: |
| 146 | .if \indir |
| 147 | A ldr \rd, [pc, \rd] |
| 148 | T add \rd, pc |
| 149 | T ldr \rd, [\rd] |
| 150 | .else |
| 151 | add \rd, pc |
| 152 | .endif |
| 153 | def_pic \val - (.Lpic\@ + (8 >> CONFIG_THUMB)), .Lpicoff\@ |
| 154 | .endm |
| 155 | |
| 156 | .macro movrel rd, val |
| 157 | #if CONFIG_PIC |
| 158 | ldpic \rd, \val |
| 159 | #elif HAVE_ARMV6T2_EXTERNAL && !defined(__APPLE__) |
| 160 | movw \rd, #:lower16:\val |
| 161 | movt \rd, #:upper16:\val |
| 162 | #else |
| 163 | ldr \rd, =\val |
| 164 | #endif |
| 165 | .endm |
| 166 | |
| 167 | .macro movrelx rd, val, gp |
| 168 | #if CONFIG_PIC && defined(__ELF__) |
| 169 | .ifnb \gp |
| 170 | .if .Lpic_gp |
| 171 | .unreq gp |
| 172 | .endif |
| 173 | gp .req \gp |
| 174 | ldpic gp, _GLOBAL_OFFSET_TABLE_ |
| 175 | .elseif !.Lpic_gp |
| 176 | gp .req r12 |
| 177 | ldpic gp, _GLOBAL_OFFSET_TABLE_ |
| 178 | .endif |
| 179 | .set .Lpic_gp, 1 |
| 180 | ldr \rd, .Lpicoff\@ |
| 181 | ldr \rd, [gp, \rd] |
| 182 | def_pic \val(GOT), .Lpicoff\@ |
| 183 | #elif CONFIG_PIC && defined(__APPLE__) |
| 184 | ldpic \rd, .Lpic\@, indir=1 |
| 185 | .non_lazy_symbol_pointer |
| 186 | .Lpic\@: |
| 187 | .indirect_symbol \val |
| 188 | .word 0 |
| 189 | .text |
| 190 | #else |
| 191 | movrel \rd, \val |
| 192 | #endif |
| 193 | .endm |
| 194 | |
| 195 | .macro add_sh rd, rn, rm, sh:vararg |
| 196 | A add \rd, \rn, \rm, \sh |
| 197 | T mov \rm, \rm, \sh |
| 198 | T add \rd, \rn, \rm |
| 199 | .endm |
| 200 | |
| 201 | .macro ldr_pre rt, rn, rm:vararg |
| 202 | A ldr \rt, [\rn, \rm]! |
| 203 | T add \rn, \rn, \rm |
| 204 | T ldr \rt, [\rn] |
| 205 | .endm |
| 206 | |
| 207 | .macro ldr_dpre rt, rn, rm:vararg |
| 208 | A ldr \rt, [\rn, -\rm]! |
| 209 | T sub \rn, \rn, \rm |
| 210 | T ldr \rt, [\rn] |
| 211 | .endm |
| 212 | |
| 213 | .macro ldr_nreg rt, rn, rm:vararg |
| 214 | A ldr \rt, [\rn, -\rm] |
| 215 | T sub \rt, \rn, \rm |
| 216 | T ldr \rt, [\rt] |
| 217 | .endm |
| 218 | |
| 219 | .macro ldr_post rt, rn, rm:vararg |
| 220 | A ldr \rt, [\rn], \rm |
| 221 | T ldr \rt, [\rn] |
| 222 | T add \rn, \rn, \rm |
| 223 | .endm |
| 224 | |
| 225 | .macro ldrc_pre cc, rt, rn, rm:vararg |
| 226 | A ldr\cc \rt, [\rn, \rm]! |
| 227 | T itt \cc |
| 228 | T add\cc \rn, \rn, \rm |
| 229 | T ldr\cc \rt, [\rn] |
| 230 | .endm |
| 231 | |
| 232 | .macro ldrd_reg rt, rt2, rn, rm |
| 233 | A ldrd \rt, \rt2, [\rn, \rm] |
| 234 | T add \rt, \rn, \rm |
| 235 | T ldrd \rt, \rt2, [\rt] |
| 236 | .endm |
| 237 | |
| 238 | .macro ldrd_post rt, rt2, rn, rm |
| 239 | A ldrd \rt, \rt2, [\rn], \rm |
| 240 | T ldrd \rt, \rt2, [\rn] |
| 241 | T add \rn, \rn, \rm |
| 242 | .endm |
| 243 | |
| 244 | .macro ldrh_pre rt, rn, rm |
| 245 | A ldrh \rt, [\rn, \rm]! |
| 246 | T add \rn, \rn, \rm |
| 247 | T ldrh \rt, [\rn] |
| 248 | .endm |
| 249 | |
| 250 | .macro ldrh_dpre rt, rn, rm |
| 251 | A ldrh \rt, [\rn, -\rm]! |
| 252 | T sub \rn, \rn, \rm |
| 253 | T ldrh \rt, [\rn] |
| 254 | .endm |
| 255 | |
| 256 | .macro ldrh_post rt, rn, rm |
| 257 | A ldrh \rt, [\rn], \rm |
| 258 | T ldrh \rt, [\rn] |
| 259 | T add \rn, \rn, \rm |
| 260 | .endm |
| 261 | |
| 262 | .macro ldrb_post rt, rn, rm |
| 263 | A ldrb \rt, [\rn], \rm |
| 264 | T ldrb \rt, [\rn] |
| 265 | T add \rn, \rn, \rm |
| 266 | .endm |
| 267 | |
| 268 | .macro str_post rt, rn, rm:vararg |
| 269 | A str \rt, [\rn], \rm |
| 270 | T str \rt, [\rn] |
| 271 | T add \rn, \rn, \rm |
| 272 | .endm |
| 273 | |
| 274 | .macro strb_post rt, rn, rm:vararg |
| 275 | A strb \rt, [\rn], \rm |
| 276 | T strb \rt, [\rn] |
| 277 | T add \rn, \rn, \rm |
| 278 | .endm |
| 279 | |
| 280 | .macro strd_post rt, rt2, rn, rm |
| 281 | A strd \rt, \rt2, [\rn], \rm |
| 282 | T strd \rt, \rt2, [\rn] |
| 283 | T add \rn, \rn, \rm |
| 284 | .endm |
| 285 | |
| 286 | .macro strh_pre rt, rn, rm |
| 287 | A strh \rt, [\rn, \rm]! |
| 288 | T add \rn, \rn, \rm |
| 289 | T strh \rt, [\rn] |
| 290 | .endm |
| 291 | |
| 292 | .macro strh_dpre rt, rn, rm |
| 293 | A strh \rt, [\rn, -\rm]! |
| 294 | T sub \rn, \rn, \rm |
| 295 | T strh \rt, [\rn] |
| 296 | .endm |
| 297 | |
| 298 | .macro strh_post rt, rn, rm |
| 299 | A strh \rt, [\rn], \rm |
| 300 | T strh \rt, [\rn] |
| 301 | T add \rn, \rn, \rm |
| 302 | .endm |
| 303 | |
| 304 | .macro strh_dpost rt, rn, rm |
| 305 | A strh \rt, [\rn], -\rm |
| 306 | T strh \rt, [\rn] |
| 307 | T sub \rn, \rn, \rm |
| 308 | .endm |
| 309 | |
| 310 | #if HAVE_VFP_ARGS |
| 311 | ELF .eabi_attribute 28, 1 |
| 312 | # define VFP |
| 313 | # define NOVFP @ |
| 314 | #else |
| 315 | # define VFP @ |
| 316 | # define NOVFP |
| 317 | #endif |
| 318 | |
| 319 | #define GLUE(a, b) a ## b |
| 320 | #define JOIN(a, b) GLUE(a, b) |
| 321 | #define X(s) JOIN(EXTERN_ASM, s) |