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https://github.com/mpv-player/mpv
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sse opt of mix32toS()
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3626 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -19,6 +19,8 @@
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* SSE optimizations from Michael Niedermayer (michaelni@gmx.at)
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*/
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#include "config.h"
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@ -445,12 +447,37 @@ static void mix32toS (sample_t * samples, sample_t bias)
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int i;
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sample_t common, surround;
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#ifdef HAVE_SSE
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asm volatile(
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"movlps %1, %%xmm7 \n\t"
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"shufps $0x00, %%xmm7, %%xmm7 \n\t"
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"movl $-1024, %%esi \n\t"
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"1: \n\t"
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"movaps 1024(%0, %%esi), %%xmm0 \n\t"
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"movaps 3072(%0, %%esi), %%xmm2 \n\t"
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"addps %%xmm7, %%xmm0 \n\t" // common
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"addps 4096(%0, %%esi), %%xmm2 \n\t" // surround
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"movaps (%0, %%esi), %%xmm1 \n\t"
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"movaps 2048(%0, %%esi), %%xmm3 \n\t"
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"subps %%xmm2, %%xmm1 \n\t"
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"addps %%xmm2, %%xmm3 \n\t"
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"addps %%xmm0, %%xmm1 \n\t"
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"addps %%xmm0, %%xmm3 \n\t"
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"movaps %%xmm1, (%0, %%esi) \n\t"
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"movaps %%xmm3, 1024(%0, %%esi) \n\t"
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"addl $16, %%esi \n\t"
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" jnz 1b \n\t"
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:: "r" (samples+256), "m" (bias)
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: "%esi"
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);
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#else
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for (i = 0; i < 256; i++) {
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common = samples[i + 256] + bias;
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surround = samples[i + 768] + samples[i + 1024];
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samples[i] += common - surround;
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samples[i + 256] = samples[i + 512] + common + surround;
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}
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#endif
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}
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static void move2to1 (sample_t * src, sample_t * dest, sample_t bias)
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