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mix2to1 in SSE

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3676 b3059339-0415-0410-9bf9-f77b7e298cf2
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michael 2001-12-23 17:08:33 +00:00
parent 0a9ad4c170
commit 34017c2089
1 changed files with 21 additions and 0 deletions
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21
liba52/downmix.c
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@ -305,8 +305,29 @@ static void mix2to1 (sample_t * dest, sample_t * src, sample_t bias)
{
int i;
#ifdef HAVE_SSE
asm volatile(
"movlps %2, %%xmm7 \n\t"
"shufps $0x00, %%xmm7, %%xmm7 \n\t"
"movl $-1024, %%esi \n\t"
"1: \n\t"
"movaps (%0, %%esi), %%xmm0 \n\t"
"movaps 16(%0, %%esi), %%xmm1 \n\t"
"addps (%1, %%esi), %%xmm0 \n\t"
"addps 16(%1, %%esi), %%xmm1 \n\t"
"addps %%xmm7, %%xmm0 \n\t"
"addps %%xmm7, %%xmm1 \n\t"
"movaps %%xmm0, (%1, %%esi) \n\t"
"movaps %%xmm1, 16(%1, %%esi) \n\t"
"addl $32, %%esi \n\t"
" jnz 1b \n\t"
:: "r" (src+256), "r" (dest+256), "m" (bias)
: "%esi"
);
#else
for (i = 0; i < 256; i++)
dest[i] += src[i] + bias;
#endif
}
static void mix3to1 (sample_t * samples, sample_t bias)