Neon optimized ARGBToY

BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/916004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@427 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 426
+Version: 427
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 426
+#define LIBYUV_VERSION 427
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/convert_from_argb.cc

@@ -37,11 +37,26 @@ int ARGBToI400(const uint8* src_argb, int src_stride_argb,
   void (*ARGBToYRow)(const uint8* src_argb, uint8* dst_y, int pix) =
       ARGBToYRow_C;
 #if defined(HAS_ARGBTOYROW_SSSE3)
-  if (TestCpuFlag(kCpuHasSSSE3) &&
-      IS_ALIGNED(width, 4) &&
-      IS_ALIGNED(src_argb, 16) && IS_ALIGNED(src_stride_argb, 16) &&
-      IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
-    ARGBToYRow = ARGBToYRow_SSSE3;
+  if (TestCpuFlag(kCpuHasSSSE3)) {
+    if (width > 16) {
+      ARGBToYRow = ARGBToYRow_Any_SSSE3;
+    }
+    if (IS_ALIGNED(width, 16)) {
+      ARGBToYRow = ARGBToYRow_Unaligned_SSSE3;
+      if (IS_ALIGNED(src_argb, 16) && IS_ALIGNED(src_stride_argb, 16) &&
+          IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
+        ARGBToYRow = ARGBToYRow_SSSE3;
+      }
+    }
+  }
+#elif defined(HAS_ARGBTOYROW_NEON)
+  if (TestCpuFlag(kCpuHasNEON)) {
+    if (width > 8) {
+      ARGBToYRow = ARGBToYRow_Any_NEON;
+    }
+    if (IS_ALIGNED(width, 8)) {
+      ARGBToYRow = ARGBToYRow_NEON;
+    }
   }
 #endif
 
@@ -69,10 +84,10 @@ int ARGBToI422(const uint8* src_argb, int src_stride_argb,
     src_argb = src_argb + (height - 1) * src_stride_argb;
     src_stride_argb = -src_stride_argb;
   }
-  void (*ARGBToYRow)(const uint8* src_argb, uint8* dst_y, int pix) =
-      ARGBToYRow_C;
   void (*ARGBToUVRow)(const uint8* src_argb0, int src_stride_argb,
                       uint8* dst_u, uint8* dst_v, int width) = ARGBToUVRow_C;
+  void (*ARGBToYRow)(const uint8* src_argb, uint8* dst_y, int pix) =
+      ARGBToYRow_C;
 #if defined(HAS_ARGBTOYROW_SSSE3)
   if (TestCpuFlag(kCpuHasSSSE3)) {
     if (width > 16) {
@@ -90,6 +105,15 @@ int ARGBToI422(const uint8* src_argb, int src_stride_argb,
       }
     }
   }
+#elif defined(HAS_ARGBTOYROW_NEON)
+  if (TestCpuFlag(kCpuHasNEON)) {
+    if (width > 8) {
+      ARGBToYRow = ARGBToYRow_Any_NEON;
+    }
+    if (IS_ALIGNED(width, 8)) {
+      ARGBToYRow = ARGBToYRow_NEON;
+    }
+  }
 #endif
 
   for (int y = 0; y < height; ++y) {

source/format_conversion.cc

@@ -299,22 +299,33 @@ int BayerToI420(const uint8* src_bayer, int src_stride_bayer,
                     uint8* dst_argb, int pix);
   void (*BayerRow1)(const uint8* src_bayer, int src_stride_bayer,
                     uint8* dst_argb, int pix);
-  void (*ARGBToYRow)(const uint8* src_argb, uint8* dst_y, int pix) =
-      ARGBToYRow_C;
+
   void (*ARGBToUVRow)(const uint8* src_argb0, int src_stride_argb,
                       uint8* dst_u, uint8* dst_v, int width) = ARGBToUVRow_C;
-  SIMD_ALIGNED(uint8 row[kMaxStride * 2]);
-
+  void (*ARGBToYRow)(const uint8* src_argb, uint8* dst_y, int pix) =
+      ARGBToYRow_C;
 #if defined(HAS_ARGBTOYROW_SSSE3)
-  if (TestCpuFlag(kCpuHasSSSE3) &&
-      IS_ALIGNED(width, 16) &&
-      IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
-    ARGBToYRow = ARGBToYRow_SSSE3;
+  if (TestCpuFlag(kCpuHasSSSE3)) {
+    if (width > 16) {
+      ARGBToUVRow = ARGBToUVRow_Any_SSSE3;
+      ARGBToYRow = ARGBToYRow_Any_SSSE3;
+    }
+    if (IS_ALIGNED(width, 16)) {
+      ARGBToUVRow = ARGBToUVRow_SSSE3;
+      ARGBToYRow = ARGBToYRow_Unaligned_SSSE3;
+      if (IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
+        ARGBToYRow = ARGBToYRow_SSSE3;
+      }
+    }
   }
-#endif
-#if defined(HAS_ARGBTOUVROW_SSSE3)
-  if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(width, 16)) {
-    ARGBToUVRow = ARGBToUVRow_SSSE3;
+#elif defined(HAS_ARGBTOYROW_NEON)
+  if (TestCpuFlag(kCpuHasNEON)) {
+    if (width > 8) {
+      ARGBToYRow = ARGBToYRow_Any_NEON;
+    }
+    if (IS_ALIGNED(width, 8)) {
+      ARGBToYRow = ARGBToYRow_NEON;
+    }
   }
 #endif
 
@@ -339,6 +350,7 @@ int BayerToI420(const uint8* src_bayer, int src_stride_bayer,
       return -1;  // Bad FourCC
   }
 
+  SIMD_ALIGNED(uint8 row[kMaxStride * 2]);
   for (int y = 0; y < height - 1; y += 2) {
     BayerRow0(src_bayer, src_stride_bayer, row, width);
     BayerRow1(src_bayer + src_stride_bayer, -src_stride_bayer,