[MIPS] Added MIPS DSPr2 optimization for BGRAConvolve2D routine

skia/ext/convolver_SSE2.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 
 #include "skia/ext/convolver.h"
 #include "skia/ext/convolver_SSE2.h"
 #include "third_party/skia/include/core/SkTypes.h"
 
 #include <emmintrin.h>  // ARCH_CPU_X86_FAMILY was defined in build/config.h
 
 namespace skia {
 
 // Convolves horizontally along a single row. The row data is given in
 // |src_data| and continues for the num_values() of the filter.
 void ConvolveHorizontally_SSE2(const unsigned char* src_data,
                                const ConvolutionFilter1D& filter,
-                               unsigned char* out_row) {
+                               unsigned char* out_row,
+                               bool /*has_alpha*/) {
   int num_values = filter.num_values();
 
   int filter_offset, filter_length;
   __m128i zero = _mm_setzero_si128();
   __m128i mask[4];
   // |mask| will be used to decimate all extra filter coefficients that are
   // loaded by SIMD when |filter_length| is not divisible by 4.
   // mask[0] is not used in following algorithm.
   mask[1] = _mm_set_epi16(0, 0, 0, 0, 0, 0, 0, -1);
   mask[2] = _mm_set_epi16(0, 0, 0, 0, 0, 0, -1, -1);
@@ skipping 417 matching lines @@
   } else {
     ConvolveVertically_SSE2<false>(filter_values,
                                    filter_length,
                                    source_data_rows,
                                    pixel_width,
                                    out_row);
   }
 }
 
 }  // namespace skia