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| author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-03-08 13:18:57 -0500 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-03-08 19:49:05 +0100 |
| commit | cc4d3dd3e2171f63cd4297292349b58788fff260 (patch) | |
| tree | 3532609eccdc054125a4c1df9fa94afad9864e3f /libavcodec/x86/ac3dsp.asm | |
| parent | 7e0a284b9f1967d46603711e85e0be01e084eadf (diff) | |
| download | ffmpeg-cc4d3dd3e2171f63cd4297292349b58788fff260.tar.gz | |
ac3enc: add SIMD-optimized shifting functions for use with the fixed-point AC3 encoder
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/x86/ac3dsp.asm')
| -rw-r--r-- | libavcodec/x86/ac3dsp.asm | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/libavcodec/x86/ac3dsp.asm b/libavcodec/x86/ac3dsp.asm index b1eeca9cd2..a7ec6cb060 100644 --- a/libavcodec/x86/ac3dsp.asm +++ b/libavcodec/x86/ac3dsp.asm @@ -133,3 +133,77 @@ 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_shift_int32() +;----------------------------------------------------------------------------- + +%macro AC3_SHIFT_4MM 3 ; src/dst, shift instruction, shift amount + mova m1, [%1 ] + mova m2, [%1+mmsize ] + mova m3, [%1+mmsize*2] + mova m4, [%1+mmsize*3] + %2 m1, %3 + %2 m2, %3 + %2 m3, %3 + %2 m4, %3 + mova [%1 ], m1 + mova [%1+mmsize ], m2 + mova [%1+mmsize*2], m3 + mova [%1+mmsize*3], m4 + add %1, mmsize*4 +%endmacro + +;----------------------------------------------------------------------------- +; void ff_ac3_lshift_int16(int16_t *src, int len, unsigned int shift) +;----------------------------------------------------------------------------- + +%macro AC3_LSHIFT_INT16 1 +cglobal ac3_lshift_int16_%1, 3,3,5, src, len, shift + test shiftd, shiftd + jz .end + movd m0, shiftd + ALIGN 8 +.loop: + AC3_SHIFT_4MM srcq, psllw, m0 + sub lend, mmsize*2 + ja .loop +.end: + REP_RET +%endmacro + +INIT_MMX +AC3_LSHIFT_INT16 mmx +INIT_XMM +AC3_LSHIFT_INT16 sse2 + +;----------------------------------------------------------------------------- +; void ff_ac3_shift_int32(int32_t *src, int len, int shift) +;----------------------------------------------------------------------------- + +%macro AC3_SHIFT_INT32 1 +cglobal ac3_shift_int32_%1, 3,3,5, src, len, shift + test shiftd, shiftd + je .end + js .shift_right + movd m0, shiftd +.loop_left: + AC3_SHIFT_4MM srcq, pslld, m0 + sub lend, mmsize + ja .loop_left + jmp .end +.shift_right: + neg shiftd + movd m0, shiftd +.loop_right: + AC3_SHIFT_4MM srcq, psrad, m0 + sub lend, mmsize + ja .loop_right +.end: + REP_RET +%endmacro + +INIT_MMX +AC3_SHIFT_INT32 mmx +INIT_XMM +AC3_SHIFT_INT32 sse2 |