Cherry pick vp8 halfpix variance fix

source/config/linux/ia32/vpx_dsp_rtcd.h

Index: source/config/linux/ia32/vpx_dsp_rtcd.h
diff --git a/source/config/linux/ia32/vpx_dsp_rtcd.h b/source/config/linux/ia32/vpx_dsp_rtcd.h
index 92d4c26055ff5279e4e1c32289607e5e5832ffab..30709eec7e107ea40e6722a747408650c48466b0 100644
--- a/source/config/linux/ia32/vpx_dsp_rtcd.h
+++ b/source/config/linux/ia32/vpx_dsp_rtcd.h
@@ -879,14 +879,17 @@ RTCD_EXTERN unsigned int (*vpx_variance8x8)(const uint8_t *src_ptr, int source_s
 
 uint32_t vpx_variance_halfpixvar16x16_h_c(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
 uint32_t vpx_variance_halfpixvar16x16_h_mmx(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
+uint32_t vpx_variance_halfpixvar16x16_h_sse2(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
 RTCD_EXTERN uint32_t (*vpx_variance_halfpixvar16x16_h)(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
 
 uint32_t vpx_variance_halfpixvar16x16_hv_c(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
 uint32_t vpx_variance_halfpixvar16x16_hv_mmx(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
+uint32_t vpx_variance_halfpixvar16x16_hv_sse2(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
 RTCD_EXTERN uint32_t (*vpx_variance_halfpixvar16x16_hv)(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
 
 uint32_t vpx_variance_halfpixvar16x16_v_c(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
 uint32_t vpx_variance_halfpixvar16x16_v_mmx(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
+uint32_t vpx_variance_halfpixvar16x16_v_sse2(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
 RTCD_EXTERN uint32_t (*vpx_variance_halfpixvar16x16_v)(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
 
 void vpx_dsp_rtcd(void);
@@ -1342,10 +1345,13 @@ static void setup_rtcd_internal(void)
     if (flags & HAS_SSE2) vpx_variance8x8 = vpx_variance8x8_sse2;
     vpx_variance_halfpixvar16x16_h = vpx_variance_halfpixvar16x16_h_c;
     if (flags & HAS_MMX) vpx_variance_halfpixvar16x16_h = vpx_variance_halfpixvar16x16_h_mmx;
+    if (flags & HAS_SSE2) vpx_variance_halfpixvar16x16_h = vpx_variance_halfpixvar16x16_h_sse2;
     vpx_variance_halfpixvar16x16_hv = vpx_variance_halfpixvar16x16_hv_c;
     if (flags & HAS_MMX) vpx_variance_halfpixvar16x16_hv = vpx_variance_halfpixvar16x16_hv_mmx;
+    if (flags & HAS_SSE2) vpx_variance_halfpixvar16x16_hv = vpx_variance_halfpixvar16x16_hv_sse2;
     vpx_variance_halfpixvar16x16_v = vpx_variance_halfpixvar16x16_v_c;
     if (flags & HAS_MMX) vpx_variance_halfpixvar16x16_v = vpx_variance_halfpixvar16x16_v_mmx;
+    if (flags & HAS_SSE2) vpx_variance_halfpixvar16x16_v = vpx_variance_halfpixvar16x16_v_sse2;
 }
 #endif