diff options
Diffstat (limited to 'libavcodec/x86/cabac.h')
| -rw-r--r-- | libavcodec/x86/cabac.h | 48 |
1 files changed, 37 insertions, 11 deletions
diff --git a/libavcodec/x86/cabac.h b/libavcodec/x86/cabac.h index d1701bf071..3a82c1e4a4 100644 --- a/libavcodec/x86/cabac.h +++ b/libavcodec/x86/cabac.h @@ -1,20 +1,20 @@ /* * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -27,8 +27,27 @@ #include "libavutil/x86/asm.h" #include "config.h" +#if (defined(__i386) && defined(__clang__) && (__clang_major__<2 || (__clang_major__==2 && __clang_minor__<10)))\ + || ( !defined(__clang__) && defined(__llvm__) && __GNUC__==4 && __GNUC_MINOR__==2 && __GNUC_PATCHLEVEL__<=1) +# define BROKEN_COMPILER 1 +#else +# define BROKEN_COMPILER 0 +#endif + #if HAVE_INLINE_ASM +#ifndef UNCHECKED_BITSTREAM_READER +#define UNCHECKED_BITSTREAM_READER !CONFIG_SAFE_BITSTREAM_READER +#endif + +#if UNCHECKED_BITSTREAM_READER +#define END_CHECK(end) "" +#else +#define END_CHECK(end) \ + "cmp "end" , %%"REG_c" \n\t"\ + "jge 1f \n\t" +#endif + #ifdef BROKEN_RELOCATIONS #define TABLES_ARG , "r"(tables) @@ -73,8 +92,7 @@ "test "lowword" , "lowword" \n\t"\ "jnz 2f \n\t"\ "mov "byte" , %%"REG_c" \n\t"\ - "cmp "end" , %%"REG_c" \n\t"\ - "jge 1f \n\t"\ + END_CHECK(end)\ "add"OPSIZE" $2 , "byte" \n\t"\ "1: \n\t"\ "movzwl (%%"REG_c") , "tmp" \n\t"\ @@ -93,6 +111,7 @@ #else /* BROKEN_RELOCATIONS */ #define TABLES_ARG +#define RIP_ARG #if HAVE_FAST_CMOV #define BRANCHLESS_GET_CABAC_UPDATE(ret, low, range, tmp)\ @@ -134,8 +153,7 @@ "test "lowword" , "lowword" \n\t"\ " jnz 2f \n\t"\ "mov "byte" , %%"REG_c" \n\t"\ - "cmp "end" , %%"REG_c" \n\t"\ - "jge 1f \n\t"\ + END_CHECK(end)\ "add"OPSIZE" $2 , "byte" \n\t"\ "1: \n\t"\ "movzwl (%%"REG_c") , "tmp" \n\t"\ @@ -154,8 +172,7 @@ #endif /* BROKEN_RELOCATIONS */ - -#if HAVE_7REGS +#if HAVE_7REGS && !BROKEN_COMPILER #define get_cabac_inline get_cabac_inline_x86 static av_always_inline int get_cabac_inline_x86(CABACContext *c, uint8_t *const state) @@ -178,17 +195,19 @@ static av_always_inline int get_cabac_inline_x86(CABACContext *c, AV_STRINGIFY(H264_LPS_RANGE_OFFSET), AV_STRINGIFY(H264_MLPS_STATE_OFFSET), "%8") - : "=&r"(bit), "+&r"(c->low), "+&r"(c->range), "=&q"(tmp) + : "=&r"(bit), "=&r"(c->low), "=&r"(c->range), "=&q"(tmp) : "r"(state), "r"(c), "i"(offsetof(CABACContext, bytestream)), "i"(offsetof(CABACContext, bytestream_end)) TABLES_ARG + ,"1"(c->low), "2"(c->range) : "%"REG_c, "memory" ); return bit & 1; } #endif /* HAVE_7REGS */ +#if !BROKEN_COMPILER #define get_cabac_bypass_sign get_cabac_bypass_sign_x86 static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val) { @@ -211,10 +230,16 @@ static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val) "movzwl (%1), %%edx \n\t" "bswap %%edx \n\t" "shrl $15, %%edx \n\t" +#if UNCHECKED_BITSTREAM_READER + "add $2, %1 \n\t" + "addl %%edx, %%eax \n\t" + "mov %1, %c4(%2) \n\t" +#else "addl %%edx, %%eax \n\t" "cmp %c5(%2), %1 \n\t" "jge 1f \n\t" "add"OPSIZE" $2, %c4(%2) \n\t" +#endif "1: \n\t" "movl %%eax, %c3(%2) \n\t" @@ -268,6 +293,7 @@ static av_always_inline int get_cabac_bypass_x86(CABACContext *c) ); return res; } +#endif /* !BROKEN_COMPILER */ #endif /* HAVE_INLINE_ASM */ #endif /* AVCODEC_X86_CABAC_H */ |