diff --git a/vp9/common/vp9_rtcd_defs.sh b/vp9/common/vp9_rtcd_defs.sh
index dab88a3b62b8ea6aa651cc699b4b18e3198b8a76..87628659b7706a7865a96d7ebde5001e1e08399c 100644
--- a/vp9/common/vp9_rtcd_defs.sh
+++ b/vp9/common/vp9_rtcd_defs.sh
@@ -139,6 +139,20 @@ specialize vp9_intra8x8_predict;
 prototype void vp9_intra_uv4x4_predict "struct macroblockd *xd, struct blockd *x, int b_mode, uint8_t *predictor"
 specialize vp9_intra_uv4x4_predict;
 
+if [ "$CONFIG_VP9_DECODER" = "yes" ]; then
+prototype void vp9_add_residual_4x4 "const int16_t *diff, const uint8_t *pred, int pitch, uint8_t *dest, int stride"
+specialize vp9_add_residual_4x4 sse2
+
+prototype void vp9_add_residual_8x8 "const int16_t *diff, const uint8_t *pred, int pitch, uint8_t *dest, int stride"
+specialize vp9_add_residual_8x8 sse2
+
+prototype void vp9_add_residual_16x16 "const int16_t *diff, const uint8_t *pred, int pitch, uint8_t *dest, int stride"
+specialize vp9_add_residual_16x16 sse2
+
+prototype void vp9_add_residual_32x32 "const int16_t *diff, const uint8_t *pred, int pitch, uint8_t *dest, int stride"
+specialize vp9_add_residual_32x32 sse2
+fi
+
 #
 # Loopfilter
 #
diff --git a/vp9/decoder/vp9_dequantize.c b/vp9/decoder/vp9_dequantize.c
index eaf98600929b10642b82ade175103445635aabd7..dade2aff56b5f7694ff78af7a0b1e46dc48c76b2 100644
--- a/vp9/decoder/vp9_dequantize.c
+++ b/vp9/decoder/vp9_dequantize.c
@@ -15,6 +15,7 @@
 #include "vp9/decoder/vp9_onyxd_int.h"
 #include "vp9/common/vp9_common.h"
 
+
 static void add_residual(const int16_t *diff, const uint8_t *pred, int pitch,
                          uint8_t *dest, int stride, int width, int height) {
   int r, c;
@@ -29,6 +30,26 @@ static void add_residual(const int16_t *diff, const uint8_t *pred, int pitch,
   }
 }
 
+void vp9_add_residual_4x4_c(const int16_t *diff, const uint8_t *pred, int pitch,
+                         uint8_t *dest, int stride) {
+  add_residual(diff, pred, pitch, dest, stride, 4, 4);
+}
+
+void vp9_add_residual_8x8_c(const int16_t *diff, const uint8_t *pred, int pitch,
+                         uint8_t *dest, int stride) {
+  add_residual(diff, pred, pitch, dest, stride, 8, 8);
+}
+
+void vp9_add_residual_16x16_c(const int16_t *diff, const uint8_t *pred,
+                              int pitch, uint8_t *dest, int stride) {
+  add_residual(diff, pred, pitch, dest, stride, 16, 16);
+}
+
+void vp9_add_residual_32x32_c(const int16_t *diff, const uint8_t *pred,
+                              int pitch, uint8_t *dest, int stride) {
+  add_residual(diff, pred, pitch, dest, stride, 32, 32);
+}
+
 static void add_constant_residual(const int16_t diff, const uint8_t *pred,
                                   int pitch, uint8_t *dest, int stride,
                                   int width, int height) {
@@ -55,7 +76,7 @@ void vp9_ht_dequant_idct_add_c(TX_TYPE tx_type, int16_t *input,
 
   vp9_short_iht4x4(input, output, 4, tx_type);
   vpx_memset(input, 0, 32);
-  add_residual(output, pred, pitch, dest, stride, 4, 4);
+  vp9_add_residual_4x4(output, pred, pitch, dest, stride);
 }
 
 void vp9_ht_dequant_idct_add_8x8_c(TX_TYPE tx_type, int16_t *input,
@@ -76,7 +97,7 @@ void vp9_ht_dequant_idct_add_8x8_c(TX_TYPE tx_type, int16_t *input,
 
     vp9_short_iht8x8(input, output, 8, tx_type);
     vpx_memset(input, 0, 128);
-    add_residual(output, pred, pitch, dest, stride, 8, 8);
+    vp9_add_residual_8x8(output, pred, pitch, dest, stride);
   }
 }
 
@@ -94,7 +115,7 @@ void vp9_dequant_idct_add_c(int16_t *input, const int16_t *dq, uint8_t *pred,
 
     vpx_memset(input, 0, 32);
 
-    add_residual(output, pred, pitch, dest, stride, 4, 4);
+    vp9_add_residual_4x4(output, pred, pitch, dest, stride);
   } else {
     vp9_dc_only_idct_add(input[0]*dq[0], pred, dest, pitch, stride);
     ((int *)input)[0] = 0;
@@ -114,7 +135,7 @@ void vp9_dequant_dc_idct_add_c(int16_t *input, const int16_t *dq, uint8_t *pred,
   // the idct halves ( >> 1) the pitch
   vp9_short_idct4x4llm(input, output, 4 << 1);
   vpx_memset(input, 0, 32);
-  add_residual(output, pred, pitch, dest, stride, 4, 4);
+  vp9_add_residual_4x4(output, pred, pitch, dest, stride);
 }
 
 void vp9_dequant_idct_add_lossless_c(int16_t *input, const int16_t *dq,
@@ -131,7 +152,7 @@ void vp9_dequant_idct_add_lossless_c(int16_t *input, const int16_t *dq,
 
     vpx_memset(input, 0, 32);
 
-    add_residual(output, pred, pitch, dest, stride, 4, 4);
+    vp9_add_residual_4x4(output, pred, pitch, dest, stride);
   } else {
     vp9_dc_only_inv_walsh_add(input[0]*dq[0], pred, dest, pitch, stride);
     ((int *)input)[0] = 0;
@@ -152,7 +173,7 @@ void vp9_dequant_dc_idct_add_lossless_c(int16_t *input, const int16_t *dq,
 
   vp9_short_inv_walsh4x4_x8_c(input, output, 4 << 1);
   vpx_memset(input, 0, 32);
-  add_residual(output, pred, pitch, dest, stride, 4, 4);
+  vp9_add_residual_4x4(output, pred, pitch, dest, stride);
 }
 
 void vp9_dequant_idct_add_8x8_c(int16_t *input, const int16_t *dq,
@@ -201,7 +222,7 @@ void vp9_dequant_idct_add_8x8_c(int16_t *input, const int16_t *dq,
     input[16] = input[17] = 0;
     input[24] = 0;
 
-    add_residual(output, pred, pitch, dest, stride, 8, 8);
+    vp9_add_residual_8x8(output, pred, pitch, dest, stride);
   } else {
     int i;
 
@@ -212,7 +233,7 @@ void vp9_dequant_idct_add_8x8_c(int16_t *input, const int16_t *dq,
     // the idct halves ( >> 1) the pitch
     vp9_short_idct8x8_c(input, output, 8 << 1);
     vpx_memset(input, 0, 128);
-    add_residual(output, pred, pitch, dest, stride, 8, 8);
+    vp9_add_residual_8x8(output, pred, pitch, dest, stride);
   }
 }
 
@@ -242,7 +263,7 @@ void vp9_ht_dequant_idct_add_16x16_c(TX_TYPE tx_type, int16_t *input,
 
     vpx_memset(input, 0, 512);
 
-    add_residual(output, pred, pitch, dest, stride, 16, 16);
+    vp9_add_residual_16x16(output, pred, pitch, dest, stride);
   }
 }
 
@@ -287,7 +308,7 @@ void vp9_dequant_idct_add_16x16_c(int16_t *input, const int16_t *dq,
     input[32] = input[33] = 0;
     input[48] = 0;
 
-    add_residual(output, pred, pitch, dest, stride, 16, 16);
+    vp9_add_residual_16x16(output, pred, pitch, dest, stride);
   } else {
     int i;
 
@@ -302,7 +323,7 @@ void vp9_dequant_idct_add_16x16_c(int16_t *input, const int16_t *dq,
 
     vpx_memset(input, 0, 512);
 
-    add_residual(output, pred, pitch, dest, stride, 16, 16);
+    vp9_add_residual_16x16(output, pred, pitch, dest, stride);
   }
 }
 
@@ -336,14 +357,14 @@ void vp9_dequant_idct_add_32x32_c(int16_t *input, const int16_t *dq,
       input[64] = input[65] = 0;
       input[96] = 0;
 
-      add_residual(output, pred, pitch, dest, stride, 32, 32);
+      vp9_add_residual_32x32(output, pred, pitch, dest, stride);
     } else {
       int i;
       for (i = 1; i < 1024; i++)
         input[i] = input[i] * dq[1] / 2;
       vp9_short_idct32x32(input, output, 64);
       vpx_memset(input, 0, 2048);
-      add_residual(output, pred, pitch, dest, stride, 32, 32);
+      vp9_add_residual_32x32(output, pred, pitch, dest, stride);
     }
   }
 }
diff --git a/vp9/decoder/x86/vp9_dequantize_x86.c b/vp9/decoder/x86/vp9_dequantize_x86.c
new file mode 100644
index 0000000000000000000000000000000000000000..0001de4eeeaa029eab15d697864b5ec039b96c47
--- /dev/null
+++ b/vp9/decoder/x86/vp9_dequantize_x86.c
@@ -0,0 +1,246 @@
+/*
+ *  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.
+ */
+
+#include <assert.h>
+#include <emmintrin.h>  // SSE2
+#include <mmintrin.h>   // SSE
+#include "./vpx_config.h"
+#include "vpx/vpx_integer.h"
+#include "vp9/common/vp9_common.h"
+#include "vp9/common/vp9_idct.h"
+
+#if HAVE_SSE2
+
+void vp9_add_residual_4x4_sse2(const int16_t *diff, const uint8_t *pred,
+                               int pitch, uint8_t *dest, int stride) {
+  const int width = 4;
+  const __m128i zero = _mm_setzero_si128();
+
+  // Diff data
+  const __m128i d0 = _mm_loadl_epi64((const __m128i *)(diff + 0 * width));
+  const __m128i d1 = _mm_loadl_epi64((const __m128i *)(diff + 1 * width));
+  const __m128i d2 = _mm_loadl_epi64((const __m128i *)(diff + 2 * width));
+  const __m128i d3 = _mm_loadl_epi64((const __m128i *)(diff + 3 * width));
+
+  // Prediction data.
+  __m128i p0 = _mm_cvtsi32_si128(*(const int *)(pred + 0 * pitch));
+  __m128i p1 = _mm_cvtsi32_si128(*(const int *)(pred + 1 * pitch));
+  __m128i p2 = _mm_cvtsi32_si128(*(const int *)(pred + 2 * pitch));
+  __m128i p3 = _mm_cvtsi32_si128(*(const int *)(pred + 3 * pitch));
+
+  p0 = _mm_unpacklo_epi8(p0, zero);
+  p1 = _mm_unpacklo_epi8(p1, zero);
+  p2 = _mm_unpacklo_epi8(p2, zero);
+  p3 = _mm_unpacklo_epi8(p3, zero);
+
+  p0 = _mm_add_epi16(p0, d0);
+  p1 = _mm_add_epi16(p1, d1);
+  p2 = _mm_add_epi16(p2, d2);
+  p3 = _mm_add_epi16(p3, d3);
+
+  p0 = _mm_packus_epi16(p0, p1);
+  p2 = _mm_packus_epi16(p2, p3);
+
+  *(int *)dest = _mm_cvtsi128_si32(p0);
+  dest += stride;
+
+  p0 = _mm_srli_si128(p0, 8);
+  *(int *)dest = _mm_cvtsi128_si32(p0);
+  dest += stride;
+
+  *(int *)dest = _mm_cvtsi128_si32(p2);
+  dest += stride;
+
+  p2 = _mm_srli_si128(p2, 8);
+  *(int *)dest = _mm_cvtsi128_si32(p2);
+}
+
+void vp9_add_residual_8x8_sse2(const int16_t *diff, const uint8_t *pred,
+                               int pitch, uint8_t *dest, int stride) {
+  const int width = 8;
+  const __m128i zero = _mm_setzero_si128();
+
+  // Diff data
+  const __m128i d0 = _mm_load_si128((const __m128i *)(diff + 0 * width));
+  const __m128i d1 = _mm_load_si128((const __m128i *)(diff + 1 * width));
+  const __m128i d2 = _mm_load_si128((const __m128i *)(diff + 2 * width));
+  const __m128i d3 = _mm_load_si128((const __m128i *)(diff + 3 * width));
+  const __m128i d4 = _mm_load_si128((const __m128i *)(diff + 4 * width));
+  const __m128i d5 = _mm_load_si128((const __m128i *)(diff + 5 * width));
+  const __m128i d6 = _mm_load_si128((const __m128i *)(diff + 6 * width));
+  const __m128i d7 = _mm_load_si128((const __m128i *)(diff + 7 * width));
+
+  // Prediction data.
+  __m128i p0 = _mm_loadl_epi64((const __m128i *)(pred + 0 * pitch));
+  __m128i p1 = _mm_loadl_epi64((const __m128i *)(pred + 1 * pitch));
+  __m128i p2 = _mm_loadl_epi64((const __m128i *)(pred + 2 * pitch));
+  __m128i p3 = _mm_loadl_epi64((const __m128i *)(pred + 3 * pitch));
+  __m128i p4 = _mm_loadl_epi64((const __m128i *)(pred + 4 * pitch));
+  __m128i p5 = _mm_loadl_epi64((const __m128i *)(pred + 5 * pitch));
+  __m128i p6 = _mm_loadl_epi64((const __m128i *)(pred + 6 * pitch));
+  __m128i p7 = _mm_loadl_epi64((const __m128i *)(pred + 7 * pitch));
+
+  p0 = _mm_unpacklo_epi8(p0, zero);
+  p1 = _mm_unpacklo_epi8(p1, zero);
+  p2 = _mm_unpacklo_epi8(p2, zero);
+  p3 = _mm_unpacklo_epi8(p3, zero);
+  p4 = _mm_unpacklo_epi8(p4, zero);
+  p5 = _mm_unpacklo_epi8(p5, zero);
+  p6 = _mm_unpacklo_epi8(p6, zero);
+  p7 = _mm_unpacklo_epi8(p7, zero);
+
+  p0 = _mm_add_epi16(p0, d0);
+  p1 = _mm_add_epi16(p1, d1);
+  p2 = _mm_add_epi16(p2, d2);
+  p3 = _mm_add_epi16(p3, d3);
+  p4 = _mm_add_epi16(p4, d4);
+  p5 = _mm_add_epi16(p5, d5);
+  p6 = _mm_add_epi16(p6, d6);
+  p7 = _mm_add_epi16(p7, d7);
+
+  p0 = _mm_packus_epi16(p0, p1);
+  p2 = _mm_packus_epi16(p2, p3);
+  p4 = _mm_packus_epi16(p4, p5);
+  p6 = _mm_packus_epi16(p6, p7);
+
+  // SSE
+  _mm_storel_pi((__m64 *)(dest + 0 * stride), (__m128)p0);
+  _mm_storeh_pi((__m64 *)(dest + 1 * stride), (__m128)p0);
+
+  _mm_storel_pi((__m64 *)(dest + 2 * stride), (__m128)p2);
+  _mm_storeh_pi((__m64 *)(dest + 3 * stride), (__m128)p2);
+
+  _mm_storel_pi((__m64 *)(dest + 4 * stride), (__m128)p4);
+  _mm_storeh_pi((__m64 *)(dest + 5 * stride), (__m128)p4);
+
+  _mm_storel_pi((__m64 *)(dest + 6 * stride), (__m128)p6);
+  _mm_storeh_pi((__m64 *)(dest + 7 * stride), (__m128)p6);
+}
+
+void vp9_add_residual_16x16_sse2(const int16_t *diff, const uint8_t *pred,
+                             int pitch, uint8_t *dest, int stride) {
+  const int width = 16;
+  int i = 4;
+  const __m128i zero = _mm_setzero_si128();
+
+  // Diff data
+  __m128i d0, d1, d2, d3, d4, d5, d6, d7;
+  __m128i p0, p1, p2, p3, p4, p5, p6, p7;
+
+  do {
+    d0 = _mm_load_si128((const __m128i *)(diff + 0 * width));
+    d1 = _mm_load_si128((const __m128i *)(diff + 0 * width + 8));
+    d2 = _mm_load_si128((const __m128i *)(diff + 1 * width));
+    d3 = _mm_load_si128((const __m128i *)(diff + 1 * width + 8));
+    d4 = _mm_load_si128((const __m128i *)(diff + 2 * width));
+    d5 = _mm_load_si128((const __m128i *)(diff + 2 * width + 8));
+    d6 = _mm_load_si128((const __m128i *)(diff + 3 * width));
+    d7 = _mm_load_si128((const __m128i *)(diff + 3 * width + 8));
+
+    // Prediction data.
+    p1 = _mm_load_si128((const __m128i *)(pred + 0 * pitch));
+    p3 = _mm_load_si128((const __m128i *)(pred + 1 * pitch));
+    p5 = _mm_load_si128((const __m128i *)(pred + 2 * pitch));
+    p7 = _mm_load_si128((const __m128i *)(pred + 3 * pitch));
+
+    p0 = _mm_unpacklo_epi8(p1, zero);
+    p1 = _mm_unpackhi_epi8(p1, zero);
+    p2 = _mm_unpacklo_epi8(p3, zero);
+    p3 = _mm_unpackhi_epi8(p3, zero);
+    p4 = _mm_unpacklo_epi8(p5, zero);
+    p5 = _mm_unpackhi_epi8(p5, zero);
+    p6 = _mm_unpacklo_epi8(p7, zero);
+    p7 = _mm_unpackhi_epi8(p7, zero);
+
+    p0 = _mm_add_epi16(p0, d0);
+    p1 = _mm_add_epi16(p1, d1);
+    p2 = _mm_add_epi16(p2, d2);
+    p3 = _mm_add_epi16(p3, d3);
+    p4 = _mm_add_epi16(p4, d4);
+    p5 = _mm_add_epi16(p5, d5);
+    p6 = _mm_add_epi16(p6, d6);
+    p7 = _mm_add_epi16(p7, d7);
+
+    p0 = _mm_packus_epi16(p0, p1);
+    p1 = _mm_packus_epi16(p2, p3);
+    p2 = _mm_packus_epi16(p4, p5);
+    p3 = _mm_packus_epi16(p6, p7);
+
+    _mm_store_si128((__m128i *)(dest + 0 * stride), p0);
+    _mm_store_si128((__m128i *)(dest + 1 * stride), p1);
+    _mm_store_si128((__m128i *)(dest + 2 * stride), p2);
+    _mm_store_si128((__m128i *)(dest + 3 * stride), p3);
+
+    diff += 4 * width;
+    pred += 4 * pitch;
+    dest += 4 * stride;
+  } while (--i);
+}
+
+void vp9_add_residual_32x32_sse2(const int16_t *diff, const uint8_t *pred,
+                             int pitch, uint8_t *dest, int stride) {
+  const int width = 32;
+  int i = 16;
+  const __m128i zero = _mm_setzero_si128();
+
+  // Diff data
+  __m128i d0, d1, d2, d3, d4, d5, d6, d7;
+  __m128i p0, p1, p2, p3, p4, p5, p6, p7;
+
+  do {
+    d0 = _mm_load_si128((const __m128i *)(diff + 0 * width));
+    d1 = _mm_load_si128((const __m128i *)(diff + 0 * width + 8));
+    d2 = _mm_load_si128((const __m128i *)(diff + 0 * width + 16));
+    d3 = _mm_load_si128((const __m128i *)(diff + 0 * width + 24));
+    d4 = _mm_load_si128((const __m128i *)(diff + 1 * width));
+    d5 = _mm_load_si128((const __m128i *)(diff + 1 * width + 8));
+    d6 = _mm_load_si128((const __m128i *)(diff + 1 * width + 16));
+    d7 = _mm_load_si128((const __m128i *)(diff + 1 * width + 24));
+
+    // Prediction data.
+    p1 = _mm_load_si128((const __m128i *)(pred + 0 * pitch));
+    p3 = _mm_load_si128((const __m128i *)(pred + 0 * pitch + 16));
+    p5 = _mm_load_si128((const __m128i *)(pred + 1 * pitch));
+    p7 = _mm_load_si128((const __m128i *)(pred + 1 * pitch + 16));
+
+    p0 = _mm_unpacklo_epi8(p1, zero);
+    p1 = _mm_unpackhi_epi8(p1, zero);
+    p2 = _mm_unpacklo_epi8(p3, zero);
+    p3 = _mm_unpackhi_epi8(p3, zero);
+    p4 = _mm_unpacklo_epi8(p5, zero);
+    p5 = _mm_unpackhi_epi8(p5, zero);
+    p6 = _mm_unpacklo_epi8(p7, zero);
+    p7 = _mm_unpackhi_epi8(p7, zero);
+
+    p0 = _mm_add_epi16(p0, d0);
+    p1 = _mm_add_epi16(p1, d1);
+    p2 = _mm_add_epi16(p2, d2);
+    p3 = _mm_add_epi16(p3, d3);
+    p4 = _mm_add_epi16(p4, d4);
+    p5 = _mm_add_epi16(p5, d5);
+    p6 = _mm_add_epi16(p6, d6);
+    p7 = _mm_add_epi16(p7, d7);
+
+    p0 = _mm_packus_epi16(p0, p1);
+    p1 = _mm_packus_epi16(p2, p3);
+    p2 = _mm_packus_epi16(p4, p5);
+    p3 = _mm_packus_epi16(p6, p7);
+
+    _mm_store_si128((__m128i *)(dest + 0 * stride), p0);
+    _mm_store_si128((__m128i *)(dest + 0 * stride + 16), p1);
+    _mm_store_si128((__m128i *)(dest + 1 * stride), p2);
+    _mm_store_si128((__m128i *)(dest + 1 * stride + 16), p3);
+
+    diff += 2 * width;
+    pred += 2 * pitch;
+    dest += 2 * stride;
+  } while (--i);
+}
+#endif
diff --git a/vp9/vp9dx.mk b/vp9/vp9dx.mk
index 7622fc0b23ca49a386233d67142b32a7d08be0bd..239ae30b693f179d1f8d50a6ccce7dd53087fe49 100644
--- a/vp9/vp9dx.mk
+++ b/vp9/vp9dx.mk
@@ -38,5 +38,11 @@ VP9_DX_SRCS-yes := $(filter-out $(VP9_DX_SRCS_REMOVE-yes),$(VP9_DX_SRCS-yes))
 
 VP9_DX_SRCS-$(HAVE_SSE2) += decoder/x86/vp9_idct_blk_sse2.c
 
+VP9_DX_SRCS-$(ARCH_X86)$(ARCH_X86_64) += decoder/x86/vp9_dequantize_x86.c
+ifeq ($(HAVE_SSE2),yes)
+vp9/decoder/x86/vp9_dequantize_x86.c.o: CFLAGS += -msse2
+vp9/decoder/x86/vp9_dequantize_x86.c.d: CFLAGS += -msse2
+endif
+
 $(eval $(call asm_offsets_template,\
          vp9_asm_dec_offsets.asm, $(VP9_PREFIX)decoder/vp9_asm_dec_offsets.c))