diff options
| author | Jason Garrett-Glaser <jason@x264.com> | 2013-07-01 23:06:22 +0400 |
|---|---|---|
| committer | Luca Barbato <lu_zero@gentoo.org> | 2013-07-04 18:06:10 +0400 |
| commit | d222f6e39e263c3455b9e1108cccda035889622d (patch) | |
| tree | 8f60be0d4dfbd3c4895cdf2d5b7174ebc440034e /libavcodec/x86 | |
| parent | 410066986f443112ed88f501e987b6ca51ed7bd4 (diff) | |
cabac: x86 version of get_cabac_bypass
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Diffstat (limited to 'libavcodec/x86')
| -rw-r--r-- | libavcodec/x86/cabac.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/libavcodec/x86/cabac.h b/libavcodec/x86/cabac.h index a74cf0bf1f..fdb0a2975c 100644 --- a/libavcodec/x86/cabac.h +++ b/libavcodec/x86/cabac.h @@ -229,5 +229,45 @@ static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val) return val; } +#define get_cabac_bypass get_cabac_bypass_x86 +static av_always_inline int get_cabac_bypass_x86(CABACContext *c) +{ + x86_reg tmp; + int res; + __asm__ volatile( + "movl %c6(%2), %k1 \n\t" + "movl %c3(%2), %%eax \n\t" + "shl $17, %k1 \n\t" + "add %%eax, %%eax \n\t" + "sub %k1, %%eax \n\t" + "cltd \n\t" + "and %%edx, %k1 \n\t" + "add %k1, %%eax \n\t" + "inc %%edx \n\t" + "test %%ax, %%ax \n\t" + "jnz 1f \n\t" + "mov %c4(%2), %1 \n\t" + "subl $0xFFFF, %%eax \n\t" + "movzwl (%1), %%ecx \n\t" + "bswap %%ecx \n\t" + "shrl $15, %%ecx \n\t" + "addl %%ecx, %%eax \n\t" + "cmp %c5(%2), %1 \n\t" + "jge 1f \n\t" + "add"OPSIZE" $2, %c4(%2) \n\t" + "1: \n\t" + "movl %%eax, %c3(%2) \n\t" + + : "=&d"(res), "=&r"(tmp) + : "r"(c), + "i"(offsetof(CABACContext, low)), + "i"(offsetof(CABACContext, bytestream)), + "i"(offsetof(CABACContext, bytestream_end)), + "i"(offsetof(CABACContext, range)) + : "%eax", "%ecx", "memory" + ); + return res; +} + #endif /* HAVE_INLINE_ASM */ #endif /* AVCODEC_X86_CABAC_H */ |