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sse opt of mix32toS()

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3626 b3059339-0415-0410-9bf9-f77b7e298cf2
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michael 2001-12-19 19:35:08 +00:00
parent 45d1802072
commit 43e3a79618
1 changed files with 27 additions and 0 deletions
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27
liba52/downmix.c
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@ -19,6 +19,8 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* SSE optimizations from Michael Niedermayer (michaelni@gmx.at)
*/
#include "config.h"
@ -445,12 +447,37 @@ static void mix32toS (sample_t * samples, sample_t bias)
int i;
sample_t common, surround;
#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"
"movaps 3072(%0, %%esi), %%xmm2 \n\t"
"addps %%xmm7, %%xmm0 \n\t" // common
"addps 4096(%0, %%esi), %%xmm2 \n\t" // surround
"movaps (%0, %%esi), %%xmm1 \n\t"
"movaps 2048(%0, %%esi), %%xmm3 \n\t"
"subps %%xmm2, %%xmm1 \n\t"
"addps %%xmm2, %%xmm3 \n\t"
"addps %%xmm0, %%xmm1 \n\t"
"addps %%xmm0, %%xmm3 \n\t"
"movaps %%xmm1, (%0, %%esi) \n\t"
"movaps %%xmm3, 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;
surround = samples[i + 768] + samples[i + 1024];
samples[i] += common - surround;
samples[i + 256] = samples[i + 512] + common + surround;
}
#endif
}
static void move2to1 (sample_t * src, sample_t * dest, sample_t bias)