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sse opt of mix32to2()

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3625 b3059339-0415-0410-9bf9-f77b7e298cf2
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michael 2001-12-19 18:58:05 +00:00
parent 2df1079043
commit 45d1802072
1 changed files with 22 additions and 0 deletions
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22
liba52/downmix.c
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@ -411,11 +411,33 @@ static void mix32to2 (sample_t * samples, sample_t bias)
int i;
sample_t common;
#ifdef HAVE_SSE
asm volatile(
"movlps %1, %%xmm7 \n\t"
"shufps $0x00, %%xmm7, %%xmm7 \n\t"
"movl $-1024, %%esi \n\t"
"1: \n\t"
"movaps 1024(%0, %%esi), %%xmm0 \n\t"
"addps %%xmm7, %%xmm0 \n\t" // common
"movaps %%xmm0, %%xmm1 \n\t" // common
"addps (%0, %%esi), %%xmm0 \n\t"
"addps 2048(%0, %%esi), %%xmm1 \n\t"
"addps 3072(%0, %%esi), %%xmm0 \n\t"
"addps 4096(%0, %%esi), %%xmm1 \n\t"
"movaps %%xmm0, (%0, %%esi) \n\t"
"movaps %%xmm1, 1024(%0, %%esi) \n\t"
"addl $16, %%esi \n\t"
" jnz 1b \n\t"
:: "r" (samples+256), "m" (bias)
: "%esi"
);
#else
for (i = 0; i < 256; i++) {
common = samples[i + 256] + bias;
samples[i] += common + samples[i + 768];
samples[i + 256] = common + samples[i + 512] + samples[i + 1024];
}
#endif
}
static void mix32toS (sample_t * samples, sample_t bias)