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mix3to2 in SSE 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3679 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2001-12-23 17:32:34 +00:00
parent c2aab97909
commit e45a5b59f8
1 changed files with 22 additions and 1 deletions
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23
liba52/downmix.c
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@ -402,11 +402,32 @@ static void mix3to2 (sample_t * samples, sample_t bias)
int i; int i;
sample_t common; 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 (%0, %%esi), %%xmm1 \n\t"
"movaps 2048(%0, %%esi), %%xmm2 \n\t"
"addps %%xmm0, %%xmm1 \n\t"
"addps %%xmm0, %%xmm2 \n\t"
"movaps %%xmm1, (%0, %%esi) \n\t"
"movaps %%xmm2, 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++) { for (i = 0; i < 256; i++) {
common = samples[i + 256] + bias; common = samples[i + 256] + bias;
samples[i] += common; samples[i] += common;
samples[i + 256] = samples[i + 512] + common; samples[i + 256] = samples[i + 512] + common;
} }
#endif
} }
static void mix21to2 (sample_t * left, sample_t * right, sample_t bias) static void mix21to2 (sample_t * left, sample_t * right, sample_t bias)
@ -670,7 +691,7 @@ void downmix (sample_t * samples, int acmod, int output, sample_t bias,
break; break;
case CONVERT (A52_3F2R, A52_2F1R): case CONVERT (A52_3F2R, A52_2F1R):
mix3to2 (samples, bias); mix3to2 (samples, bias); //FIXME possible bug? (output doesnt seem to be used)
move2to1 (samples + 768, samples + 512, bias); move2to1 (samples + 768, samples + 512, bias);
break; break;