diff --git a/README.chromium b/README.chromium
index 1140b59c0..f0763709f 100644
--- a/README.chromium
+++ b/README.chromium
@@ -1,6 +1,6 @@
 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 311
+Version: 312
 License: BSD
 License File: LICENSE
 
diff --git a/include/libyuv/version.h b/include/libyuv/version.h
index 5080331db..499d6aa5c 100644
--- a/include/libyuv/version.h
+++ b/include/libyuv/version.h
@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 311
+#define LIBYUV_VERSION 312
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT
diff --git a/libyuv_test.gyp b/libyuv_test.gyp
index a9bfbbd9f..d368012d7 100644
--- a/libyuv_test.gyp
+++ b/libyuv_test.gyp
@@ -43,6 +43,26 @@
         }],
       ], # conditions
     },
+
+    {
+      'target_name': 'compare',
+      'type': 'executable',
+      'dependencies': [
+        'libyuv.gyp:libyuv',
+      ],
+      'sources': [
+        # sources
+        'util/compare.cc',
+      ],
+      'conditions': [
+        ['OS=="linux"', {
+          'cflags': [
+            '-fexceptions',
+          ],
+        }],
+      ], # conditions
+    },
+
   ], # targets
 }
 
diff --git a/unit_test/planar_test.cc b/unit_test/planar_test.cc
index 7c209cbda..84cfd48a0 100644
--- a/unit_test/planar_test.cc
+++ b/unit_test/planar_test.cc
@@ -825,10 +825,10 @@ TEST_F(libyuvTest, TestInterpolate) {
   SIMD_ALIGNED(uint8 orig_pixels_1[256][4]);
   SIMD_ALIGNED(uint8 interpolate_pixels[256][4]);
 
-  orig_pixels_0[0][0] = 10u;
-  orig_pixels_0[0][1] = 20u;
-  orig_pixels_0[0][2] = 40u;
-  orig_pixels_0[0][3] = 80u;
+  orig_pixels_0[0][0] = 16u;
+  orig_pixels_0[0][1] = 32u;
+  orig_pixels_0[0][2] = 64u;
+  orig_pixels_0[0][3] = 128u;
   orig_pixels_0[1][0] = 0u;
   orig_pixels_0[1][1] = 0u;
   orig_pixels_0[1][2] = 0u;
@@ -861,10 +861,10 @@ TEST_F(libyuvTest, TestInterpolate) {
 
   ARGBInterpolate(&orig_pixels_0[0][0], 0, &orig_pixels_1[0][0], 0,
                   &interpolate_pixels[0][0], 0, 4, 1, 128);
-  EXPECT_EQ(5u, interpolate_pixels[0][0]);
-  EXPECT_EQ(10u, interpolate_pixels[0][1]);
-  EXPECT_EQ(20u, interpolate_pixels[0][2]);
-  EXPECT_EQ(40u, interpolate_pixels[0][3]);
+  EXPECT_EQ(8u, interpolate_pixels[0][0]);
+  EXPECT_EQ(16u, interpolate_pixels[0][1]);
+  EXPECT_EQ(32u, interpolate_pixels[0][2]);
+  EXPECT_EQ(64u, interpolate_pixels[0][3]);
   EXPECT_EQ(0u, interpolate_pixels[1][0]);
   EXPECT_EQ(0u, interpolate_pixels[1][1]);
   EXPECT_EQ(0u, interpolate_pixels[1][2]);
@@ -880,11 +880,18 @@ TEST_F(libyuvTest, TestInterpolate) {
 
   ARGBInterpolate(&orig_pixels_0[0][0], 0, &orig_pixels_1[0][0], 0,
                   &interpolate_pixels[0][0], 0, 4, 1, 0);
+  EXPECT_EQ(16u, interpolate_pixels[0][0]);
+  EXPECT_EQ(32u, interpolate_pixels[0][1]);
+  EXPECT_EQ(64u, interpolate_pixels[0][2]);
+  EXPECT_EQ(128u, interpolate_pixels[0][3]);
 
-  EXPECT_EQ(10u, interpolate_pixels[0][0]);
-  EXPECT_EQ(20u, interpolate_pixels[0][1]);
-  EXPECT_EQ(40u, interpolate_pixels[0][2]);
-  EXPECT_EQ(80u, interpolate_pixels[0][3]);
+  ARGBInterpolate(&orig_pixels_0[0][0], 0, &orig_pixels_1[0][0], 0,
+                  &interpolate_pixels[0][0], 0, 4, 1, 192);
+
+  EXPECT_EQ(4u, interpolate_pixels[0][0]);
+  EXPECT_EQ(8u, interpolate_pixels[0][1]);
+  EXPECT_EQ(16u, interpolate_pixels[0][2]);
+  EXPECT_EQ(32u, interpolate_pixels[0][3]);
 
   for (int i = 0; i < 1000 * 1280 * 720 / 256; ++i) {
     ARGBInterpolate(&orig_pixels_0[0][0], 0, &orig_pixels_1[0][0], 0,
diff --git a/util/compare.cc b/util/compare.cc
new file mode 100644
index 000000000..968ec3c30
--- /dev/null
+++ b/util/compare.cc
@@ -0,0 +1,64 @@
+/*
+ *  Copyright (c) 2012 The LibYuv 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "libyuv/basic_types.h"
+#include "libyuv/compare.h"
+#include "libyuv/version.h"
+
+int main(int argc, char** argv) {
+  if (argc < 1) {
+    printf("libyuv compare v\n", LIBYUV_VERSION);
+    printf("compare file1.yuv file2.yuv\n");
+    return -1;
+  }
+  char* name1 = argv[1];
+  char* name2 = (argc > 2) ? argv[2] : NULL;
+  FILE* fin1 = fopen(name1, "rb");
+  FILE* fin2 = name2 ? fopen(name2, "rb") : NULL;
+
+  const int kBlockSize = 32768;
+  uint8 buf1[kBlockSize];
+  uint8 buf2[kBlockSize];
+  uint32 hash1 = 5381;
+  uint32 hash2 = 5381;
+  uint64 sum_square_err = 0;
+  uint64 size_min = 0;
+  int amt1 = 0;
+  int amt2 = 0;
+  do {
+    amt1 = fread(buf1, 1, kBlockSize, fin1);
+    if (amt1 > 0) hash1 = libyuv::HashDjb2(buf1, amt1, hash1);
+    if (fin2) {
+      amt2 = fread(buf2, 1, kBlockSize, fin2);
+      if (amt2 > 0) hash2 = libyuv::HashDjb2(buf2, amt2, hash2);
+      int amt_min = (amt1 < amt2) ? amt1 : amt2;
+      size_min += amt_min;
+      sum_square_err += libyuv::ComputeSumSquareError(buf1, buf2, amt_min);
+    }
+  } while (amt1 > 0 || amt2 > 0);
+
+  printf("hash1 %x", hash1);
+  if (fin2) {
+    printf(", hash2 %x", hash1, hash2);
+    double mse = static_cast<double>(sum_square_err) /
+                 static_cast<double>(size_min);
+    printf(", mse %.2f", mse);
+    double psnr = libyuv::SumSquareErrorToPsnr(sum_square_err, size_min);
+    printf(", psnr %.2f\n", psnr);
+    fclose(fin2);
+  }
+  fclose(fin1);
+}
+