avoid xmm7 in formatconversion

BUG=none
TEST=build/run on linux
Review URL: http://webrtc-codereview.appspot.com/255010

git-svn-id: http://libyuv.googlecode.com/svn/trunk@57 16f28f9a-4ce2-e073-06de-1de4eb20be90

source/format_conversion.cc

@@ -30,14 +30,14 @@ static void ARGBToBayerRow_SSSE3(const uint8* src_argb,
   __asm {
     mov        eax, [esp + 4]    // src_argb
     mov        edx, [esp + 8]    // dst_bayer
-    movd       xmm7, [esp + 12]  // selector
+    movd       xmm5, [esp + 12]  // selector
     mov        ecx, [esp + 16]   // pix
-    pshufd     xmm7, xmm7, 0
+    pshufd     xmm5, xmm5, 0
 
   wloop:
     movdqa     xmm0, [eax]
     lea        eax, [eax + 16]
-    pshufb     xmm0, xmm7
+    pshufb     xmm0, xmm5
     movd       [edx], xmm0
     lea        edx, [edx + 4]
     sub        ecx, 4
@@ -53,12 +53,12 @@ static void ARGBToBayerRow_SSSE3(const uint8* src_argb,
 static void ARGBToBayerRow_SSSE3(const uint8* src_argb, uint8* dst_bayer,
                                  uint32 selector, int pix) {
   asm volatile(
-    "movd   %3,%%xmm7\n"
-    "pshufd $0x0,%%xmm7,%%xmm7\n"
-"1:"
+    "movd   %3,%%xmm5\n"
+    "pshufd $0x0,%%xmm5,%%xmm5\n"
+"1:\n"
     "movdqa (%0),%%xmm0\n"
     "lea    0x10(%0),%0\n"
-    "pshufb %%xmm7,%%xmm0\n"
+    "pshufb %%xmm5,%%xmm0\n"
     "movd   %%xmm0,(%1)\n"
     "lea    0x4(%1),%1\n"
     "sub    $0x4,%2\n"
@@ -66,8 +66,12 @@ static void ARGBToBayerRow_SSSE3(const uint8* src_argb, uint8* dst_bayer,
   : "+r"(src_argb),  // %0
     "+r"(dst_bayer), // %1
     "+r"(pix)        // %2
-  : "r"(selector)    // %3
-  : "memory"
+  : "g"(selector)    // %3
+  : "memory", "cc"
+#if defined(__SSE2__)
+    , "xmm0", "xmm5"
+#endif
+
 );
 }
 #endif