Add SSSE3 (Core2 aka Conroe/Merom/Woodcrester new instructions) detection

Originally committed as revision 7332 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/dsputil.h

@@ -484,6 +484,7 @@ int mm_support(void);
 #define MM_SSE2   0x0010 /* PIV SSE2 functions */
 #define MM_3DNOWEXT  0x0020 /* AMD 3DNowExt */
 #define MM_SSE3   0x0040 /* Prescott SSE3 functions */
+#define MM_SSSE3  0x0080 /* Conroe SSSE3 functions */
 
 extern int mm_flags;
 

libavcodec/i386/cputest.c

@@ -87,6 +87,8 @@ int mm_support(void)
             rval |= MM_SSE2;
         if (ecx & 1)
             rval |= MM_SSE3;
+        if (ecx & 0x00000200 )
+            rval |= MM_SSSE3;
     }
 
     cpuid(0x80000000, max_ext_level, ebx, ecx, edx);
@@ -104,11 +106,13 @@ int mm_support(void)
     }
 
 #if 0
-    av_log(NULL, AV_LOG_DEBUG, "%s%s%s%s%s%s\n",
+    av_log(NULL, AV_LOG_DEBUG, "%s%s%s%s%s%s%s%s\n",
         (rval&MM_MMX) ? "MMX ":"",
         (rval&MM_MMXEXT) ? "MMX2 ":"",
         (rval&MM_SSE) ? "SSE ":"",
         (rval&MM_SSE2) ? "SSE2 ":"",
+        (rval&MM_SSE3) ? "SSE3 ":"",
+        (rval&MM_SSSE3) ? "SSSE3 ":"",
         (rval&MM_3DNOW) ? "3DNow ":"",
         (rval&MM_3DNOWEXT) ? "3DNowExt ":"");
 #endif