libwebp: update to v0.5.1

third_party/libwebp/dsp/yuv_mips32.c

Index: third_party/libwebp/dsp/yuv_mips32.c
diff --git a/third_party/libwebp/dsp/yuv_mips32.c b/third_party/libwebp/dsp/yuv_mips32.c
index b8fe512f1feae70bc654e85e77a1454e494ac13b..e61aac571fff10c025158b858ba01d96ee654357 100644
--- a/third_party/libwebp/dsp/yuv_mips32.c
+++ b/third_party/libwebp/dsp/yuv_mips32.c
@@ -14,8 +14,7 @@
 
 #include "./dsp.h"
 
-// Code is disabled for now, in favor of the plain-C version
-#if 0  // defined(WEBP_USE_MIPS32)
+#if defined(WEBP_USE_MIPS32)
 
 #include "./yuv.h"
 
@@ -29,19 +28,19 @@ static void FUNC_NAME(const uint8_t* y,                                        \
   int i, r, g, b;                                                              \
   int temp0, temp1, temp2, temp3, temp4;                                       \
   for (i = 0; i < (len >> 1); i++) {                                           \
-    temp1 = kVToR * v[0];                                                      \
-    temp3 = kVToG * v[0];                                                      \
-    temp2 = kUToG * u[0];                                                      \
-    temp4 = kUToB * u[0];                                                      \
-    temp0 = kYScale * y[0];                                                    \
-    temp1 += kRCst;                                                            \
-    temp3 -= kGCst;                                                            \
+    temp1 = MultHi(v[0], 26149);                                               \
+    temp3 = MultHi(v[0], 13320);                                               \
+    temp2 = MultHi(u[0], 6419);                                                \
+    temp4 = MultHi(u[0], 33050);                                               \
+    temp0 = MultHi(y[0], 19077);                                               \
+    temp1 -= 14234;                                                            \
+    temp3 -= 8708;                                                             \
     temp2 += temp3;                                                            \
-    temp4 += kBCst;                                                            \
+    temp4 -= 17685;                                                            \
     r = VP8Clip8(temp0 + temp1);                                               \
     g = VP8Clip8(temp0 - temp2);                                               \
     b = VP8Clip8(temp0 + temp4);                                               \
-    temp0 = kYScale * y[1];                                                    \
+    temp0 = MultHi(y[1], 19077);                                               \
     dst[R] = r;                                                                \
     dst[G] = g;                                                                \
     dst[B] = b;                                                                \
@@ -59,15 +58,15 @@ static void FUNC_NAME(const uint8_t* y,                                        \
     dst += 2 * XSTEP;                                                          \
   }                                                                            \
   if (len & 1) {                                                               \
-    temp1 = kVToR * v[0];                                                      \
-    temp3 = kVToG * v[0];                                                      \
-    temp2 = kUToG * u[0];                                                      \
-    temp4 = kUToB * u[0];                                                      \
-    temp0 = kYScale * y[0];                                                    \
-    temp1 += kRCst;                                                            \
-    temp3 -= kGCst;                                                            \
+    temp1 = MultHi(v[0], 26149);                                               \
+    temp3 = MultHi(v[0], 13320);                                               \
+    temp2 = MultHi(u[0], 6419);                                                \
+    temp4 = MultHi(u[0], 33050);                                               \
+    temp0 = MultHi(y[0], 19077);                                               \
+    temp1 -= 14234;                                                            \
+    temp3 -= 8708;                                                             \
     temp2 += temp3;                                                            \
-    temp4 += kBCst;                                                            \
+    temp4 -= 17685;                                                            \
     r = VP8Clip8(temp0 + temp1);                                               \
     g = VP8Clip8(temp0 - temp2);                                               \
     b = VP8Clip8(temp0 + temp4);                                               \