libvpx: Pull from upstream

source/libvpx/vp9/common/x86/vp9_subpixel_variance_sse2.c

-/*
- *  Copyright (c) 2010 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.
- */
-
-#define HALFNDX 8
-
-void vp9_half_horiz_variance16x_h_sse2(const unsigned char *ref_ptr,
-                                       int ref_pixels_per_line,
-                                       const unsigned char *src_ptr,
-                                       int src_pixels_per_line,
-                                       unsigned int Height,
-                                       int *sum,
-                                       unsigned int *sumsquared);
-
-void vp9_half_vert_variance16x_h_sse2(const unsigned char *ref_ptr,
-                                      int ref_pixels_per_line,
-                                      const unsigned char *src_ptr,
-                                      int src_pixels_per_line,
-                                      unsigned int Height,
-                                      int *sum,
-                                      unsigned int *sumsquared);
-
-void vp9_half_horiz_vert_variance16x_h_sse2(const unsigned char *ref_ptr,
-                                            int ref_pixels_per_line,
-                                            const unsigned char *src_ptr,
-                                            int src_pixels_per_line,
-                                            unsigned int Height,
-                                            int *sum,
-                                            unsigned int *sumsquared);
-
-void vp9_filter_block2d_bil_var_sse2(const unsigned char *ref_ptr,
-                                     int ref_pixels_per_line,
-                                     const unsigned char *src_ptr,
-                                     int src_pixels_per_line,
-                                     unsigned int Height,
-                                     int  xoffset,
-                                     int  yoffset,
-                                     int *sum,
-                                     unsigned int *sumsquared);