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Diffstat (limited to 'ffmpeg1/libavutil/arm/asm.S')
| -rw-r--r-- | ffmpeg1/libavutil/arm/asm.S | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/ffmpeg1/libavutil/arm/asm.S b/ffmpeg1/libavutil/arm/asm.S new file mode 100644 index 0000000..6061e47 --- /dev/null +++ b/ffmpeg1/libavutil/arm/asm.S @@ -0,0 +1,304 @@ +/* + * Copyright (c) 2008 Mans Rullgard <mans@mansr.com> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "config.h" + +#ifdef __ELF__ +# define ELF +#else +# define ELF @ +#endif + +#if CONFIG_THUMB +# define A @ +# define T +#else +# define A +# define T @ +#endif + +#if HAVE_NEON + .arch armv7-a +#elif HAVE_ARMV6T2 + .arch armv6t2 +#elif HAVE_ARMV6 + .arch armv6 +#elif HAVE_ARMV5TE + .arch armv5te +#endif + +#if HAVE_NEON + .fpu neon +#elif HAVE_VFP + .fpu vfp +#endif + + .syntax unified +T .thumb +ELF .eabi_attribute 25, 1 @ Tag_ABI_align_preserved + +.macro function name, export=0 + .set .Lpic_idx, 0 + .set .Lpic_gp, 0 + .macro endfunc + .if .Lpic_idx + .align 2 + .altmacro + put_pic %(.Lpic_idx - 1) + .noaltmacro + .endif +ELF .size \name, . - \name + .endfunc + .purgem endfunc + .endm + .text + .align 2 + .if \export + .global EXTERN_ASM\name +EXTERN_ASM\name: + .endif +ELF .type \name, %function + .func \name +\name: +.endm + +.macro const name, align=2 + .macro endconst +ELF .size \name, . - \name + .purgem endconst + .endm + .section .rodata + .align \align +\name: +.endm + +#if !HAVE_ARMV6T2_EXTERNAL +.macro movw rd, val + mov \rd, \val & 255 + orr \rd, \val & ~255 +.endm +#endif + +.macro mov32 rd, val +#if HAVE_ARMV6T2_EXTERNAL + movw \rd, #(\val) & 0xffff + .if (\val) >> 16 + movt \rd, #(\val) >> 16 + .endif +#else + ldr \rd, =\val +#endif +.endm + +.macro put_pic num + put_pic_\num +.endm + +.macro do_def_pic num, val, label + .macro put_pic_\num + .if \num + .altmacro + put_pic %(\num - 1) + .noaltmacro + .endif +\label: .word \val + .purgem put_pic_\num + .endm +.endm + +.macro def_pic val, label + .altmacro + do_def_pic %.Lpic_idx, \val, \label + .noaltmacro + .set .Lpic_idx, .Lpic_idx + 1 +.endm + +.macro ldpic rd, val, indir=0 + ldr \rd, .Lpicoff\@ +.Lpic\@: + .if \indir +A ldr \rd, [pc, \rd] +T add \rd, pc +T ldr \rd, [\rd] + .else + add \rd, pc + .endif + def_pic \val - (.Lpic\@ + (8 >> CONFIG_THUMB)), .Lpicoff\@ +.endm + +.macro movrel rd, val +#if CONFIG_PIC + ldpic \rd, \val +#elif HAVE_ARMV6T2_EXTERNAL && !defined(__APPLE__) + movw \rd, #:lower16:\val + movt \rd, #:upper16:\val +#else + ldr \rd, =\val +#endif +.endm + +.macro movrelx rd, val, gp +#if CONFIG_PIC && defined(__ELF__) + .ifnb \gp + .if .Lpic_gp + .unreq gp + .endif + gp .req \gp + ldpic gp, _GLOBAL_OFFSET_TABLE_ + .elseif !.Lpic_gp + gp .req r12 + ldpic gp, _GLOBAL_OFFSET_TABLE_ + .endif + .set .Lpic_gp, 1 + ldr \rd, .Lpicoff\@ + ldr \rd, [gp, \rd] + def_pic \val(GOT), .Lpicoff\@ +#elif CONFIG_PIC && defined(__APPLE__) + ldpic \rd, .Lpic\@, indir=1 + .non_lazy_symbol_pointer +.Lpic\@: + .indirect_symbol \val + .word 0 + .text +#else + movrel \rd, \val +#endif +.endm + +.macro add_sh rd, rn, rm, sh:vararg +A add \rd, \rn, \rm, \sh +T mov \rm, \rm, \sh +T add \rd, \rn, \rm +.endm + +.macro ldr_pre rt, rn, rm:vararg +A ldr \rt, [\rn, \rm]! +T add \rn, \rn, \rm +T ldr \rt, [\rn] +.endm + +.macro ldr_dpre rt, rn, rm:vararg +A ldr \rt, [\rn, -\rm]! +T sub \rn, \rn, \rm +T ldr \rt, [\rn] +.endm + +.macro ldr_nreg rt, rn, rm:vararg +A ldr \rt, [\rn, -\rm] +T sub \rt, \rn, \rm +T ldr \rt, [\rt] +.endm + +.macro ldr_post rt, rn, rm:vararg +A ldr \rt, [\rn], \rm +T ldr \rt, [\rn] +T add \rn, \rn, \rm +.endm + +.macro ldrd_reg rt, rt2, rn, rm +A ldrd \rt, \rt2, [\rn, \rm] +T add \rt, \rn, \rm +T ldrd \rt, \rt2, [\rt] +.endm + +.macro ldrd_post rt, rt2, rn, rm +A ldrd \rt, \rt2, [\rn], \rm +T ldrd \rt, \rt2, [\rn] +T add \rn, \rn, \rm +.endm + +.macro ldrh_pre rt, rn, rm +A ldrh \rt, [\rn, \rm]! +T add \rn, \rn, \rm +T ldrh \rt, [\rn] +.endm + +.macro ldrh_dpre rt, rn, rm +A ldrh \rt, [\rn, -\rm]! +T sub \rn, \rn, \rm +T ldrh \rt, [\rn] +.endm + +.macro ldrh_post rt, rn, rm +A ldrh \rt, [\rn], \rm +T ldrh \rt, [\rn] +T add \rn, \rn, \rm +.endm + +.macro ldrb_post rt, rn, rm +A ldrb \rt, [\rn], \rm +T ldrb \rt, [\rn] +T add \rn, \rn, \rm +.endm + +.macro str_post rt, rn, rm:vararg +A str \rt, [\rn], \rm +T str \rt, [\rn] +T add \rn, \rn, \rm +.endm + +.macro strb_post rt, rn, rm:vararg +A strb \rt, [\rn], \rm +T strb \rt, [\rn] +T add \rn, \rn, \rm +.endm + +.macro strd_post rt, rt2, rn, rm +A strd \rt, \rt2, [\rn], \rm +T strd \rt, \rt2, [\rn] +T add \rn, \rn, \rm +.endm + +.macro strh_pre rt, rn, rm +A strh \rt, [\rn, \rm]! +T add \rn, \rn, \rm +T strh \rt, [\rn] +.endm + +.macro strh_dpre rt, rn, rm +A strh \rt, [\rn, -\rm]! +T sub \rn, \rn, \rm +T strh \rt, [\rn] +.endm + +.macro strh_post rt, rn, rm +A strh \rt, [\rn], \rm +T strh \rt, [\rn] +T add \rn, \rn, \rm +.endm + +.macro strh_dpost rt, rn, rm +A strh \rt, [\rn], -\rm +T strh \rt, [\rn] +T sub \rn, \rn, \rm +.endm + +#if HAVE_VFP_ARGS + .eabi_attribute 28, 1 +# define VFP +# define NOVFP @ +#else +# define VFP @ +# define NOVFP +#endif + +#define GLUE(a, b) a ## b +#define JOIN(a, b) GLUE(a, b) +#define X(s) JOIN(EXTERN_ASM, s) |