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memset(?, 0, 256*sizeof(float)) in MMX 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3739 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2001-12-25 17:19:18 +00:00
parent a54006e1cf
commit 26e195ff89
1 changed files with 18 additions and 2 deletions
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20
liba52/downmix.c
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@ -65,7 +65,7 @@ int downmix_init (int input, int flags, sample_t * level,
output = flags & A52_CHANNEL_MASK;
if (output > A52_DOLBY)
return -1;
output = table[output][input & 7];
if ((output == A52_STEREO) &&
@ -593,9 +593,25 @@ static void move2to1 (sample_t * src, sample_t * dest, sample_t bias)
static void zero (sample_t * samples)
{
int i;
#ifdef HAVE_MMX
asm volatile(
"movl $-1024, %%esi \n\t"
"pxor %%mm0, %%mm0 \n\t"
"1: \n\t"
"movq %%mm0, (%0, %%esi) \n\t"
"movq %%mm0, 8(%0, %%esi) \n\t"
"movq %%mm0, 16(%0, %%esi) \n\t"
"movq %%mm0, 24(%0, %%esi) \n\t"
"addl $32, %%esi \n\t"
" jnz 1b \n\t"
"emms"
:: "r" (samples+256)
: "%esi"
);
#else
for (i = 0; i < 256; i++)
samples[i] = 0;
#endif
}
void downmix (sample_t * samples, int acmod, int output, sample_t bias,