Add MSA optimized I422AlphaToARGBRow_MSA and I422ToRGB24Row_MSA functions

source/convert_argb.cc

 /*
  *  Copyright 2011 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS. All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 546 matching lines @@
 #endif
 #if defined(HAS_I422ALPHATOARGBROW_DSPR2)
   if (TestCpuFlag(kCpuHasDSPR2) && IS_ALIGNED(width, 4) &&
       IS_ALIGNED(src_y, 4) && IS_ALIGNED(src_stride_y, 4) &&
       IS_ALIGNED(src_u, 2) && IS_ALIGNED(src_stride_u, 2) &&
       IS_ALIGNED(src_v, 2) && IS_ALIGNED(src_stride_v, 2) &&
       IS_ALIGNED(dst_argb, 4) && IS_ALIGNED(dst_stride_argb, 4)) {
     I422AlphaToARGBRow = I422AlphaToARGBRow_DSPR2;
   }
 #endif
+#if defined(HAS_I422ALPHATOARGBROW_MSA)
+  if (TestCpuFlag(kCpuHasMSA)) {
+    I422AlphaToARGBRow = I422AlphaToARGBRow_Any_MSA;
+    if (IS_ALIGNED(width, 8)) {
+      I422AlphaToARGBRow = I422AlphaToARGBRow_MSA;
+    }
+  }
+#endif
 #if defined(HAS_ARGBATTENUATEROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3)) {
     ARGBAttenuateRow = ARGBAttenuateRow_Any_SSSE3;
     if (IS_ALIGNED(width, 4)) {
       ARGBAttenuateRow = ARGBAttenuateRow_SSSE3;
     }
   }
 #endif
 #if defined(HAS_ARGBATTENUATEROW_AVX2)
   if (TestCpuFlag(kCpuHasAVX2)) {
@@ skipping 825 matching lines @@
     src_uyvy += src_stride_uyvy;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif