[Mplayer-cvslog] CVS: main/liba52 downmix.c,1.2,1.3

[Michael Niedermayer]

Update of /cvsroot/mplayer/main/liba52
In directory mplayer:/var/tmp.root/cvs-serv8553

Modified Files:
	downmix.c 
Log Message:
sse opt of mix32toS()

Index: downmix.c
===================================================================
RCS file: /cvsroot/mplayer/main/liba52/downmix.c,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- downmix.c	19 Dec 2001 18:58:05 -0000	1.2
+++ downmix.c	19 Dec 2001 19:35:08 -0000	1.3
@@ -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 at gmx.at)
  */
 
 #include "config.h"
@@ -445,12 +447,37 @@
     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)