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| author | James Almer <jamrial@gmail.com> | 2014-04-16 02:09:36 -0300 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-04-16 18:36:52 +0200 |
| commit | 11b36b1ee051e53c815114f8c258e23166ea9ed1 (patch) | |
| tree | b83aee02b5cba539bce45a351c1fbd810e38706a /libavutil/x86/float_dsp.asm | |
| parent | 27f184ef40e8da09d9dfc8f71a8d1893729381f6 (diff) | |
| download | ffmpeg-11b36b1ee051e53c815114f8c258e23166ea9ed1.tar.gz | |
x86/float_dsp: unroll loop in vector_fmac_scalar
~6% faster SSE2 performance. AVX/FMA3 are unaffected.
Signed-off-by: James Almer <jamrial@gmail.com>
Reviewed-by: Christophe Gisquet <christophe.gisquet@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavutil/x86/float_dsp.asm')
| -rw-r--r-- | libavutil/x86/float_dsp.asm | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/libavutil/x86/float_dsp.asm b/libavutil/x86/float_dsp.asm index 01ac60eb0a..8d236ef7af 100644 --- a/libavutil/x86/float_dsp.asm +++ b/libavutil/x86/float_dsp.asm @@ -61,9 +61,9 @@ VECTOR_FMUL %macro VECTOR_FMAC_SCALAR 0 %if UNIX64 -cglobal vector_fmac_scalar, 3,3,3, dst, src, len +cglobal vector_fmac_scalar, 3,3,5, dst, src, len %else -cglobal vector_fmac_scalar, 4,4,3, dst, src, mul, len +cglobal vector_fmac_scalar, 4,4,5, dst, src, mul, len %endif %if ARCH_X86_32 VBROADCASTSS m0, mulm @@ -78,23 +78,31 @@ cglobal vector_fmac_scalar, 4,4,3, dst, src, mul, len %endif lea lenq, [lend*4-64] .loop: -%assign a 0 -%rep 32/mmsize %if cpuflag(fma3) - mova m1, [dstq+lenq+(a+0)*mmsize] - mova m2, [dstq+lenq+(a+1)*mmsize] - fmaddps m1, m0, [srcq+lenq+(a+0)*mmsize], m1 - fmaddps m2, m0, [srcq+lenq+(a+1)*mmsize], m2 -%else - mulps m1, m0, [srcq+lenq+(a+0)*mmsize] - mulps m2, m0, [srcq+lenq+(a+1)*mmsize] - addps m1, m1, [dstq+lenq+(a+0)*mmsize] - addps m2, m2, [dstq+lenq+(a+1)*mmsize] -%endif - mova [dstq+lenq+(a+0)*mmsize], m1 - mova [dstq+lenq+(a+1)*mmsize], m2 -%assign a a+2 -%endrep + mova m1, [dstq+lenq] + mova m2, [dstq+lenq+1*mmsize] + fmaddps m1, m0, [srcq+lenq], m1 + fmaddps m2, m0, [srcq+lenq+1*mmsize], m2 +%else ; cpuflag + mulps m1, m0, [srcq+lenq] + mulps m2, m0, [srcq+lenq+1*mmsize] +%if mmsize < 32 + mulps m3, m0, [srcq+lenq+2*mmsize] + mulps m4, m0, [srcq+lenq+3*mmsize] +%endif ; mmsize + addps m1, m1, [dstq+lenq] + addps m2, m2, [dstq+lenq+1*mmsize] +%if mmsize < 32 + addps m3, m3, [dstq+lenq+2*mmsize] + addps m4, m4, [dstq+lenq+3*mmsize] +%endif ; mmsize +%endif ; cpuflag + mova [dstq+lenq], m1 + mova [dstq+lenq+1*mmsize], m2 +%if mmsize < 32 + mova [dstq+lenq+2*mmsize], m3 + mova [dstq+lenq+3*mmsize], m4 +%endif ; mmsize sub lenq, 64 jge .loop REP_RET |