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 60T .thumb 61ELF .eabi_attribute 25, 1 @ Tag_ABI_align_preserved 62ELF .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 74ELF .size \name, . - \name 75FUNC .endfunc 76 .purgem endfunc 77 .endm 78 .text 79 .align \align 80 .if \export 81 .global EXTERN_ASM\name 82ELF .type EXTERN_ASM\name, %function 83FUNC .func EXTERN_ASM\name 84EXTERN_ASM\name: 85 .else 86ELF .type \name, %function 87FUNC .func \name 88\name: 89 .endif 90.endm 91 92.macro const name, align=2 93 .macro endconst 94ELF .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 147A ldr \rd, [pc, \rd] 148T add \rd, pc 149T 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 196A add \rd, \rn, \rm, \sh 197T mov \rm, \rm, \sh 198T add \rd, \rn, \rm 199.endm 200 201.macro ldr_pre rt, rn, rm:vararg 202A ldr \rt, [\rn, \rm]! 203T add \rn, \rn, \rm 204T ldr \rt, [\rn] 205.endm 206 207.macro ldr_dpre rt, rn, rm:vararg 208A ldr \rt, [\rn, -\rm]! 209T sub \rn, \rn, \rm 210T ldr \rt, [\rn] 211.endm 212 213.macro ldr_nreg rt, rn, rm:vararg 214A ldr \rt, [\rn, -\rm] 215T sub \rt, \rn, \rm 216T ldr \rt, [\rt] 217.endm 218 219.macro ldr_post rt, rn, rm:vararg 220A ldr \rt, [\rn], \rm 221T ldr \rt, [\rn] 222T add \rn, \rn, \rm 223.endm 224 225.macro ldrc_pre cc, rt, rn, rm:vararg 226A ldr\cc \rt, [\rn, \rm]! 227T itt \cc 228T add\cc \rn, \rn, \rm 229T ldr\cc \rt, [\rn] 230.endm 231 232.macro ldrd_reg rt, rt2, rn, rm 233A ldrd \rt, \rt2, [\rn, \rm] 234T add \rt, \rn, \rm 235T ldrd \rt, \rt2, [\rt] 236.endm 237 238.macro ldrd_post rt, rt2, rn, rm 239A ldrd \rt, \rt2, [\rn], \rm 240T ldrd \rt, \rt2, [\rn] 241T add \rn, \rn, \rm 242.endm 243 244.macro ldrh_pre rt, rn, rm 245A ldrh \rt, [\rn, \rm]! 246T add \rn, \rn, \rm 247T ldrh \rt, [\rn] 248.endm 249 250.macro ldrh_dpre rt, rn, rm 251A ldrh \rt, [\rn, -\rm]! 252T sub \rn, \rn, \rm 253T ldrh \rt, [\rn] 254.endm 255 256.macro ldrh_post rt, rn, rm 257A ldrh \rt, [\rn], \rm 258T ldrh \rt, [\rn] 259T add \rn, \rn, \rm 260.endm 261 262.macro ldrb_post rt, rn, rm 263A ldrb \rt, [\rn], \rm 264T ldrb \rt, [\rn] 265T add \rn, \rn, \rm 266.endm 267 268.macro str_post rt, rn, rm:vararg 269A str \rt, [\rn], \rm 270T str \rt, [\rn] 271T add \rn, \rn, \rm 272.endm 273 274.macro strb_post rt, rn, rm:vararg 275A strb \rt, [\rn], \rm 276T strb \rt, [\rn] 277T add \rn, \rn, \rm 278.endm 279 280.macro strd_post rt, rt2, rn, rm 281A strd \rt, \rt2, [\rn], \rm 282T strd \rt, \rt2, [\rn] 283T add \rn, \rn, \rm 284.endm 285 286.macro strh_pre rt, rn, rm 287A strh \rt, [\rn, \rm]! 288T add \rn, \rn, \rm 289T strh \rt, [\rn] 290.endm 291 292.macro strh_dpre rt, rn, rm 293A strh \rt, [\rn, -\rm]! 294T sub \rn, \rn, \rm 295T strh \rt, [\rn] 296.endm 297 298.macro strh_post rt, rn, rm 299A strh \rt, [\rn], \rm 300T strh \rt, [\rn] 301T add \rn, \rn, \rm 302.endm 303 304.macro strh_dpost rt, rn, rm 305A strh \rt, [\rn], -\rm 306T strh \rt, [\rn] 307T sub \rn, \rn, \rm 308.endm 309 310#if HAVE_VFP_ARGS 311ELF .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) 322