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| author | Diego Biurrun <diego@biurrun.de> | 2013-04-26 16:48:39 +0200 |
|---|---|---|
| committer | Diego Biurrun <diego@biurrun.de> | 2013-04-26 21:06:52 +0200 |
| commit | 7c00e9d8aed8511c44281d7b05562578a3fcd4c8 (patch) | |
| tree | 13e5870e9c654801cb5b932154e72e71f2419ca4 /libavcodec/x86/ac3dsp.asm | |
| parent | 74685f6783e77f2545d48bd2124945ad5be39982 (diff) | |
| download | ffmpeg-7c00e9d8aed8511c44281d7b05562578a3fcd4c8.tar.gz | |
x86: ac3dsp: Remove 3dnow version of ff_ac3_extract_exponents
The function requires increasing the fuzz factor for the ac3/eac3 encode
tests and even so makes fate fail. It only provides a slight encoding
speedup for legacy CPUs that do not support SS2. Thus its benefit is not
worth the trouble it creates and fixing it would be a waste of time.
Diffstat (limited to 'libavcodec/x86/ac3dsp.asm')
| -rw-r--r-- | libavcodec/x86/ac3dsp.asm | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/libavcodec/x86/ac3dsp.asm b/libavcodec/x86/ac3dsp.asm index b4986ad50f..b43231855c 100644 --- a/libavcodec/x86/ac3dsp.asm +++ b/libavcodec/x86/ac3dsp.asm @@ -379,42 +379,6 @@ cglobal ac3_compute_mantissa_size, 1, 2, 4, mant_cnt, sum %endif %endmacro -%if HAVE_AMD3DNOW_EXTERNAL -INIT_MMX 3dnow -cglobal ac3_extract_exponents, 3, 3, 0, exp, coef, len - add expq, lenq - lea coefq, [coefq+4*lenq] - neg lenq - movq m3, [pd_1] - movq m4, [pd_151] -.loop: - movq m0, [coefq+4*lenq ] - movq m1, [coefq+4*lenq+8] - PABSD m0, m2 - PABSD m1, m2 - pslld m0, 1 - por m0, m3 - pi2fd m2, m0 - psrld m2, 23 - movq m0, m4 - psubd m0, m2 - pslld m1, 1 - por m1, m3 - pi2fd m2, m1 - psrld m2, 23 - movq m1, m4 - psubd m1, m2 - packssdw m0, m0 - packuswb m0, m0 - packssdw m1, m1 - packuswb m1, m1 - punpcklwd m0, m1 - movd [expq+lenq], m0 - add lenq, 4 - jl .loop - REP_RET -%endif - %macro AC3_EXTRACT_EXPONENTS 0 cglobal ac3_extract_exponents, 3, 3, 4, exp, coef, len add expq, lenq |