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| author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-03-11 16:45:01 -0500 |
|---|---|---|
| committer | Justin Ruggles <justin.ruggles@gmail.com> | 2011-03-14 08:45:31 -0400 |
| commit | f1efbca5e914b28cd37cb1ea82d371acf3b96f61 (patch) | |
| tree | a1464d5951e558f17e941c9f13d3548b733e6c03 /libavcodec/x86/ac3dsp.asm | |
| parent | 323e6fead07c75f418e4b60704a4f437bb3483b2 (diff) | |
| download | ffmpeg-f1efbca5e914b28cd37cb1ea82d371acf3b96f61.tar.gz | |
ac3enc: add SIMD-optimized shifting functions for use with the fixed-point AC3 encoder.
Diffstat (limited to 'libavcodec/x86/ac3dsp.asm')
| -rw-r--r-- | libavcodec/x86/ac3dsp.asm | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/libavcodec/x86/ac3dsp.asm b/libavcodec/x86/ac3dsp.asm index b1eeca9cd2..e281791b1e 100644 --- a/libavcodec/x86/ac3dsp.asm +++ b/libavcodec/x86/ac3dsp.asm @@ -133,3 +133,48 @@ INIT_XMM AC3_MAX_MSB_ABS_INT16 sse2, min_max %define ABS2 ABS2_SSSE3 AC3_MAX_MSB_ABS_INT16 ssse3, or_abs + +;----------------------------------------------------------------------------- +; macro used for ff_ac3_lshift_int16() and ff_ac3_rshift_int32() +;----------------------------------------------------------------------------- + +%macro AC3_SHIFT 4 ; l/r, 16/32, shift instruction, instruction set +cglobal ac3_%1shift_int%2_%4, 3,3,5, src, len, shift + movd m0, shiftd +.loop: + mova m1, [srcq ] + mova m2, [srcq+mmsize ] + mova m3, [srcq+mmsize*2] + mova m4, [srcq+mmsize*3] + %3 m1, m0 + %3 m2, m0 + %3 m3, m0 + %3 m4, m0 + mova [srcq ], m1 + mova [srcq+mmsize ], m2 + mova [srcq+mmsize*2], m3 + mova [srcq+mmsize*3], m4 + add srcq, mmsize*4 + sub lend, mmsize*32/%2 + ja .loop +.end: + REP_RET +%endmacro + +;----------------------------------------------------------------------------- +; void ff_ac3_lshift_int16(int16_t *src, unsigned int len, unsigned int shift) +;----------------------------------------------------------------------------- + +INIT_MMX +AC3_SHIFT l, 16, psllw, mmx +INIT_XMM +AC3_SHIFT l, 16, psllw, sse2 + +;----------------------------------------------------------------------------- +; void ff_ac3_rshift_int32(int32_t *src, unsigned int len, unsigned int shift) +;----------------------------------------------------------------------------- + +INIT_MMX +AC3_SHIFT r, 32, psrad, mmx +INIT_XMM +AC3_SHIFT r, 32, psrad, sse2 |