Add MSA optimized ARGB4444ToI420 and ARGB4444ToARGB 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 1057 matching lines @@
   }
 #endif
 #if defined(HAS_ARGB4444TOARGBROW_NEON)
   if (TestCpuFlag(kCpuHasNEON)) {
     ARGB4444ToARGBRow = ARGB4444ToARGBRow_Any_NEON;
     if (IS_ALIGNED(width, 8)) {
       ARGB4444ToARGBRow = ARGB4444ToARGBRow_NEON;
     }
   }
 #endif
+#if defined(HAS_ARGB4444TOARGBROW_MSA)
+  if (TestCpuFlag(kCpuHasMSA)) {
+    ARGB4444ToARGBRow = ARGB4444ToARGBRow_Any_MSA;
+    if (IS_ALIGNED(width, 16)) {
+      ARGB4444ToARGBRow = ARGB4444ToARGBRow_MSA;
+    }
+  }
+#endif
 
   for (y = 0; y < height; ++y) {
     ARGB4444ToARGBRow(src_argb4444, dst_argb, width);
     src_argb4444 += src_stride_argb4444;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 
 // Convert NV12 to ARGB.
@@ skipping 290 matching lines @@
     src_uyvy += src_stride_uyvy;
     dst_argb += dst_stride_argb;
   }
   return 0;
 }
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif