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_AS_FPU_DIRECTIVE 44# define FPU 45#else 46# define FPU @ 47#endif 48 49#if HAVE_NEON 50 .arch armv7-a 51#elif HAVE_ARMV6T2 52 .arch armv6t2 53#elif HAVE_ARMV6 54 .arch armv6 55#elif HAVE_ARMV5TE 56 .arch armv5te 57#endif 58#if HAVE_AS_OBJECT_ARCH 59ELF .object_arch armv4 60#endif 61 62#if HAVE_NEON 63FPU .fpu neon 64ELF .eabi_attribute 10, 0 @ suppress Tag_FP_arch 65ELF .eabi_attribute 12, 0 @ suppress Tag_Advanced_SIMD_arch 66#elif HAVE_VFP 67FPU .fpu vfp 68ELF .eabi_attribute 10, 0 @ suppress Tag_FP_arch 69#endif 70 71 .syntax unified 72T .thumb 73ELF .eabi_attribute 25, 1 @ Tag_ABI_align_preserved 74ELF .section .note.GNU-stack,"",%progbits @ Mark stack as non-executable 75 76.macro function name, export=0, align=2 77 .set .Lpic_idx, 0 78 .set .Lpic_gp, 0 79 .macro endfunc 80 .if .Lpic_idx 81 .align 2 82 .altmacro 83 put_pic %(.Lpic_idx - 1) 84 .noaltmacro 85 .endif 86 .if .Lpic_gp 87 .unreq gp 88 .endif 89ELF .size \name, . - \name 90FUNC .endfunc 91 .purgem endfunc 92 .endm 93 .text 94 .align \align 95 .if \export 96 .global EXTERN_ASM\name 97ELF .type EXTERN_ASM\name, %function 98FUNC .func EXTERN_ASM\name 99EXTERN_ASM\name: 100 .else 101ELF .type \name, %function 102FUNC .func \name 103\name: 104 .endif 105.endm 106 107.macro const name, align=2, relocate=0 108 .macro endconst 109ELF .size \name, . - \name 110 .purgem endconst 111 .endm 112.if HAVE_SECTION_DATA_REL_RO && \relocate 113 .section .data.rel.ro 114.else 115 .section .rodata 116.endif 117 .align \align 118\name: 119.endm 120 121#if !HAVE_ARMV6T2_EXTERNAL 122.macro movw rd, val 123 mov \rd, \val & 255 124 orr \rd, \val & ~255 125.endm 126#endif 127 128.macro mov32 rd, val 129#if HAVE_ARMV6T2_EXTERNAL 130 movw \rd, #(\val) & 0xffff 131 .if (\val) >> 16 132 movt \rd, #(\val) >> 16 133 .endif 134#else 135 ldr \rd, =\val 136#endif 137.endm 138 139.macro put_pic num 140 put_pic_\num 141.endm 142 143.macro do_def_pic num, val, label 144 .macro put_pic_\num 145 .if \num 146 .altmacro 147 put_pic %(\num - 1) 148 .noaltmacro 149 .endif 150\label: .word \val 151 .purgem put_pic_\num 152 .endm 153.endm 154 155.macro def_pic val, label 156 .altmacro 157 do_def_pic %.Lpic_idx, \val, \label 158 .noaltmacro 159 .set .Lpic_idx, .Lpic_idx + 1 160.endm 161 162.macro ldpic rd, val, indir=0 163 ldr \rd, .Lpicoff\@ 164.Lpic\@: 165 .if \indir 166A ldr \rd, [pc, \rd] 167T add \rd, pc 168T ldr \rd, [\rd] 169 .else 170 add \rd, pc 171 .endif 172 def_pic \val - (.Lpic\@ + (8 >> CONFIG_THUMB)), .Lpicoff\@ 173.endm 174 175.macro movrel rd, val 176#if CONFIG_PIC 177 ldpic \rd, \val 178#elif HAVE_ARMV6T2_EXTERNAL && !defined(__APPLE__) 179 movw \rd, #:lower16:\val 180 movt \rd, #:upper16:\val 181#else 182 ldr \rd, =\val 183#endif 184.endm 185 186.macro movrelx rd, val, gp 187 .ifc \rd,\gp 188 .error "movrelx needs two distinct registers" 189 .endif 190 .ifc \rd\()_\gp,r12_ 191 .warning "movrelx rd=\rd without explicit set gp" 192 .endif 193 .ifc \rd\()_\gp,ip_ 194 .warning "movrelx rd=\rd without explicit set gp" 195 .endif 196#if CONFIG_PIC && defined(__ELF__) 197 .ifnb \gp 198 .if .Lpic_gp 199 .unreq gp 200 .endif 201 gp .req \gp 202 ldpic gp, _GLOBAL_OFFSET_TABLE_ 203 .elseif !.Lpic_gp 204 gp .req r12 205 ldpic gp, _GLOBAL_OFFSET_TABLE_ 206 .endif 207 .set .Lpic_gp, 1 208 ldr \rd, .Lpicoff\@ 209 ldr \rd, [gp, \rd] 210 def_pic \val(GOT), .Lpicoff\@ 211#elif CONFIG_PIC && defined(__APPLE__) 212 ldpic \rd, .Lpic\@, indir=1 213 .non_lazy_symbol_pointer 214.Lpic\@: 215 .indirect_symbol \val 216 .word 0 217 .text 218#else 219 movrel \rd, \val 220#endif 221.endm 222 223.macro add_sh rd, rn, rm, sh:vararg 224A add \rd, \rn, \rm, \sh 225T mov \rm, \rm, \sh 226T add \rd, \rn, \rm 227.endm 228 229.macro ldr_pre rt, rn, rm:vararg 230A ldr \rt, [\rn, \rm]! 231T add \rn, \rn, \rm 232T ldr \rt, [\rn] 233.endm 234 235.macro ldr_dpre rt, rn, rm:vararg 236A ldr \rt, [\rn, -\rm]! 237T sub \rn, \rn, \rm 238T ldr \rt, [\rn] 239.endm 240 241.macro ldr_nreg rt, rn, rm:vararg 242A ldr \rt, [\rn, -\rm] 243T sub \rt, \rn, \rm 244T ldr \rt, [\rt] 245.endm 246 247.macro ldr_post rt, rn, rm:vararg 248A ldr \rt, [\rn], \rm 249T ldr \rt, [\rn] 250T add \rn, \rn, \rm 251.endm 252 253.macro ldrc_pre cc, rt, rn, rm:vararg 254A ldr\cc \rt, [\rn, \rm]! 255T itt \cc 256T add\cc \rn, \rn, \rm 257T ldr\cc \rt, [\rn] 258.endm 259 260.macro ldrd_reg rt, rt2, rn, rm 261A ldrd \rt, \rt2, [\rn, \rm] 262T add \rt, \rn, \rm 263T ldrd \rt, \rt2, [\rt] 264.endm 265 266.macro ldrd_post rt, rt2, rn, rm 267A ldrd \rt, \rt2, [\rn], \rm 268T ldrd \rt, \rt2, [\rn] 269T add \rn, \rn, \rm 270.endm 271 272.macro ldrh_pre rt, rn, rm 273A ldrh \rt, [\rn, \rm]! 274T add \rn, \rn, \rm 275T ldrh \rt, [\rn] 276.endm 277 278.macro ldrh_dpre rt, rn, rm 279A ldrh \rt, [\rn, -\rm]! 280T sub \rn, \rn, \rm 281T ldrh \rt, [\rn] 282.endm 283 284.macro ldrh_post rt, rn, rm 285A ldrh \rt, [\rn], \rm 286T ldrh \rt, [\rn] 287T add \rn, \rn, \rm 288.endm 289 290.macro ldrb_post rt, rn, rm 291A ldrb \rt, [\rn], \rm 292T ldrb \rt, [\rn] 293T add \rn, \rn, \rm 294.endm 295 296.macro str_post rt, rn, rm:vararg 297A str \rt, [\rn], \rm 298T str \rt, [\rn] 299T add \rn, \rn, \rm 300.endm 301 302.macro strb_post rt, rn, rm:vararg 303A strb \rt, [\rn], \rm 304T strb \rt, [\rn] 305T add \rn, \rn, \rm 306.endm 307 308.macro strd_post rt, rt2, rn, rm 309A strd \rt, \rt2, [\rn], \rm 310T strd \rt, \rt2, [\rn] 311T add \rn, \rn, \rm 312.endm 313 314.macro strh_pre rt, rn, rm 315A strh \rt, [\rn, \rm]! 316T add \rn, \rn, \rm 317T strh \rt, [\rn] 318.endm 319 320.macro strh_dpre rt, rn, rm 321A strh \rt, [\rn, -\rm]! 322T sub \rn, \rn, \rm 323T strh \rt, [\rn] 324.endm 325 326.macro strh_post rt, rn, rm 327A strh \rt, [\rn], \rm 328T strh \rt, [\rn] 329T add \rn, \rn, \rm 330.endm 331 332.macro strh_dpost rt, rn, rm 333A strh \rt, [\rn], -\rm 334T strh \rt, [\rn] 335T sub \rn, \rn, \rm 336.endm 337 338#if HAVE_VFP_ARGS 339ELF .eabi_attribute 28, 1 340# define VFP 341# define NOVFP @ 342#else 343# define VFP @ 344# define NOVFP 345#endif 346 347#define GLUE(a, b) a ## b 348#define JOIN(a, b) GLUE(a, b) 349#define X(s) JOIN(EXTERN_ASM, s) 350