libvpx: Pull from upstream

source/libvpx/vp8/encoder/x86/denoising_sse2.c

 /*
  *  Copyright (c) 2012 The WebM 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 12 matching lines @@
   const __m128i acc_diff_lo = _mm_srai_epi16(
       _mm_unpacklo_epi8(acc_diff, acc_diff), 8);
   const __m128i acc_diff_hi = _mm_srai_epi16(
       _mm_unpackhi_epi8(acc_diff, acc_diff), 8);
   const __m128i acc_diff_16 = _mm_add_epi16(acc_diff_lo, acc_diff_hi);
   const __m128i hg_fe_dc_ba = _mm_madd_epi16(acc_diff_16, k_1);
   const __m128i hgfe_dcba = _mm_add_epi32(hg_fe_dc_ba,
                                           _mm_srli_si128(hg_fe_dc_ba, 8));
   const __m128i hgfedcba = _mm_add_epi32(hgfe_dcba,
                                          _mm_srli_si128(hgfe_dcba, 4));
-  unsigned int sum_diff = _mm_cvtsi128_si32(hgfedcba);
+  unsigned int sum_diff = abs(_mm_cvtsi128_si32(hgfedcba));
 
-  return abs(sum_diff);
+  return sum_diff;
 }
 
 int vp8_denoiser_filter_sse2(unsigned char *mc_running_avg_y,
                              int mc_avg_y_stride,
                              unsigned char *running_avg_y, int avg_y_stride,
                              unsigned char *sig, int sig_stride,
                              unsigned int motion_magnitude,
                              int increase_denoising)
 {
     unsigned char *running_avg_y_start = running_avg_y;
@@ skipping 324 matching lines @@
             }
           } else {
             return COPY_BLOCK;
           }
         }
     }
 
     vp8_copy_mem8x8(running_avg_start, avg_stride, sig_start, sig_stride);
     return FILTER_BLOCK;
 }