Add MSA optimized ARGB4444ToI420 and ARGB4444ToARGB functions

source/convert.cc

Index: source/convert.cc
diff --git a/source/convert.cc b/source/convert.cc
index ba07b3959c71d8e7b46abbd43d08f4aebf14db1b..077ae90b6ee161e71c128d9c58bdb4fff7e96369 100644
--- a/source/convert.cc
+++ b/source/convert.cc
@@ -532,6 +532,22 @@ int ARGBToI420(const uint8* src_argb, int src_stride_argb,
     }
   }
 #endif
+#if defined(HAS_ARGBTOYROW_MSA)
+  if (TestCpuFlag(kCpuHasMSA)) {
+    ARGBToYRow = ARGBToYRow_Any_MSA;
+    if (IS_ALIGNED(width, 16)) {
+      ARGBToYRow = ARGBToYRow_MSA;
+    }
+  }
+#endif
+#if defined(HAS_ARGBTOUVROW_MSA)
+  if (TestCpuFlag(kCpuHasMSA)) {
+    ARGBToUVRow = ARGBToUVRow_Any_MSA;
+    if (IS_ALIGNED(width, 32)) {
+      ARGBToUVRow = ARGBToUVRow_MSA;
+    }
+  }
+#endif
 
   for (y = 0; y < height - 1; y += 2) {
     ARGBToUVRow(src_argb, src_stride_argb, dst_u, dst_v, width);
@@ -1283,6 +1299,14 @@ int ARGB4444ToI420(const uint8* src_argb4444, int src_stride_argb4444,
     }
   }
 #endif
+#if defined(HAS_ARGB4444TOARGBROW_MSA)
+  if (TestCpuFlag(kCpuHasMSA)) {
+    ARGB4444ToARGBRow = ARGB4444ToARGBRow_Any_MSA;
+    if (IS_ALIGNED(width, 16)) {
+      ARGB4444ToARGBRow = ARGB4444ToARGBRow_MSA;
+    }
+  }
+#endif
 #if defined(HAS_ARGBTOYROW_SSSE3) && defined(HAS_ARGBTOUVROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3)) {
     ARGBToUVRow = ARGBToUVRow_Any_SSSE3;
@@ -1303,6 +1327,18 @@ int ARGB4444ToI420(const uint8* src_argb4444, int src_stride_argb4444,
     }
   }
 #endif
+#if defined(HAS_ARGBTOYROW_MSA)
+  if (TestCpuFlag(kCpuHasMSA)) {
+    ARGBToUVRow = ARGBToUVRow_Any_MSA;
+    ARGBToYRow = ARGBToYRow_Any_MSA;
+    if (IS_ALIGNED(width, 16)) {
+      ARGBToYRow = ARGBToYRow_MSA;
+      if (IS_ALIGNED(width, 32)) {
+        ARGBToUVRow = ARGBToUVRow_MSA;
+      }
+    }
+  }
+#endif
   {
     // Allocate 2 rows of ARGB.
     const int kRowSize = (width * 4 + 31) & ~31;