diff --git a/README.chromium b/README.chromium
index 7447b9fc0..d11d2fcc2 100644
--- a/README.chromium
+++ b/README.chromium
@@ -1,6 +1,6 @@
 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 542
+Version: 543
 License: BSD
 License File: LICENSE
 
diff --git a/include/libyuv/planar_functions.h b/include/libyuv/planar_functions.h
index 7247f880e..f2b4aacc0 100644
--- a/include/libyuv/planar_functions.h
+++ b/include/libyuv/planar_functions.h
@@ -216,6 +216,13 @@ int ARGBMultiply(const uint8* src_argb0, int src_stride_argb0,
                  uint8* dst_argb, int dst_stride_argb,
                  int width, int height);
 
+// Add ARGB image with ARGB image.
+LIBYUV_API
+int ARGBAdd(const uint8* src_argb0, int src_stride_argb0,
+            const uint8* src_argb1, int src_stride_argb1,
+            uint8* dst_argb, int dst_stride_argb,
+            int width, int height);
+
 // Convert I422 to YUY2.
 LIBYUV_API
 int I422ToYUY2(const uint8* src_y, int src_stride_y,
diff --git a/include/libyuv/row.h b/include/libyuv/row.h
index ca594af74..79c7cd135 100644
--- a/include/libyuv/row.h
+++ b/include/libyuv/row.h
@@ -99,6 +99,7 @@ extern "C" {
 #define HAS_YUY2TOYROW_SSE2
 
 // Effects
+#define HAS_ARGBADDROW_SSE2
 #define HAS_ARGBAFFINEROW_SSE2
 #define HAS_ARGBATTENUATEROW_SSSE3
 #define HAS_ARGBBLENDROW_SSSE3
@@ -967,7 +968,7 @@ void ARGBBlendRow_NEON(const uint8* src_argb, const uint8* src_argb1,
 void ARGBBlendRow_C(const uint8* src_argb, const uint8* src_argb1,
                     uint8* dst_argb, int width);
 
-// ARGB preattenuated alpha blend.  Same API as Blend, but these require
+// ARGB multiply images.  Same API as Blend, but these require
 // pointer and width alignment for SSE2.
 void ARGBMultiplyRow_C(const uint8* src_argb, const uint8* src_argb1,
                        uint8* dst_argb, int width);
@@ -976,6 +977,14 @@ void ARGBMultiplyRow_SSE2(const uint8* src_argb, const uint8* src_argb1,
 void ARGBMultiplyRow_Any_SSE2(const uint8* src_argb, const uint8* src_argb1,
                               uint8* dst_argb, int width);
 
+// ARGB add images.
+void ARGBAddRow_C(const uint8* src_argb, const uint8* src_argb1,
+                  uint8* dst_argb, int width);
+void ARGBAddRow_SSE2(const uint8* src_argb, const uint8* src_argb1,
+                     uint8* dst_argb, int width);
+void ARGBAddRow_Any_SSE2(const uint8* src_argb, const uint8* src_argb1,
+                         uint8* dst_argb, int width);
+
 void ARGBToRGB24Row_Any_SSSE3(const uint8* src_argb, uint8* dst_rgb, int pix);
 void ARGBToRAWRow_Any_SSSE3(const uint8* src_argb, uint8* dst_rgb, int pix);
 void ARGBToRGB565Row_Any_SSE2(const uint8* src_argb, uint8* dst_rgb, int pix);
diff --git a/include/libyuv/version.h b/include/libyuv/version.h
index 69e5ff069..c24413b39 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 542
+#define LIBYUV_VERSION 543
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT
diff --git a/source/planar_functions.cc b/source/planar_functions.cc
index 9aca6555d..5a613761b 100644
--- a/source/planar_functions.cc
+++ b/source/planar_functions.cc
@@ -448,6 +448,50 @@ int ARGBMultiply(const uint8* src_argb0, int src_stride_argb0,
   return 0;
 }
 
+// Add 2 ARGB images together and store to destination.
+LIBYUV_API
+int ARGBAdd(const uint8* src_argb0, int src_stride_argb0,
+            const uint8* src_argb1, int src_stride_argb1,
+            uint8* dst_argb, int dst_stride_argb,
+            int width, int height) {
+  if (!src_argb0 || !src_argb1 || !dst_argb || width <= 0 || height == 0) {
+    return -1;
+  }
+  // Negative height means invert the image.
+  if (height < 0) {
+    height = -height;
+    dst_argb = dst_argb + (height - 1) * dst_stride_argb;
+    dst_stride_argb = -dst_stride_argb;
+  }
+
+  void (*ARGBAddRow)(const uint8* src0, const uint8* src1, uint8* dst,
+                     int width) = ARGBAddRow_C;
+#if defined(HAS_ARGBADDROW_SSE2)
+  if (TestCpuFlag(kCpuHasSSE2) && width >= 4 &&
+      IS_ALIGNED(src_argb0, 16) && IS_ALIGNED(src_stride_argb0, 16) &&
+      IS_ALIGNED(src_argb1, 16) && IS_ALIGNED(src_stride_argb1, 16) &&
+      IS_ALIGNED(dst_argb, 16) && IS_ALIGNED(dst_stride_argb, 16)) {
+    ARGBAddRow = ARGBAddRow_Any_SSE2;
+    if (IS_ALIGNED(width, 4)) {
+      ARGBAddRow = ARGBAddRow_SSE2;
+    }
+  }
+#elif defined(HAS_ARGBADDROW_NEON)
+  if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 4)) {
+    ARGBAddRow = ARGBAddRow_NEON;
+  }
+#endif
+
+  // Add plane
+  for (int y = 0; y < height; ++y) {
+    ARGBAddRow(src_argb0, src_argb1, dst_argb, width);
+    src_argb0 += src_stride_argb0;
+    src_argb1 += src_stride_argb1;
+    dst_argb += dst_stride_argb;
+  }
+  return 0;
+}
+
 // Convert I422 to BGRA.
 LIBYUV_API
 int I422ToBGRA(const uint8* src_y, int src_stride_y,
diff --git a/source/row_any.cc b/source/row_any.cc
index 8c6a8122a..5d6dc5403 100644
--- a/source/row_any.cc
+++ b/source/row_any.cc
@@ -324,7 +324,7 @@ UV422ANY(UYVYToUV422Row_Any_NEON, UYVYToUV422Row_NEON,
 #endif
 #undef UV422ANY
 
-#define SplitUVRowANY(NAMEANY, ANYTOUV_SIMD, ANYTOUV_C, MASK)                  \
+#define SPLITUVROWANY(NAMEANY, ANYTOUV_SIMD, ANYTOUV_C, MASK)                  \
     void NAMEANY(const uint8* src_uv,                                          \
                  uint8* dst_u, uint8* dst_v, int width) {                      \
       int n = width & ~MASK;                                                   \
@@ -336,21 +336,21 @@ UV422ANY(UYVYToUV422Row_Any_NEON, UYVYToUV422Row_NEON,
     }
 
 #ifdef HAS_SPLITUVROW_SSE2
-SplitUVRowANY(SplitUVRow_Any_SSE2, SplitUVRow_Unaligned_SSE2, SplitUVRow_C, 15)
+SPLITUVROWANY(SplitUVRow_Any_SSE2, SplitUVRow_Unaligned_SSE2, SplitUVRow_C, 15)
 #endif
 #ifdef HAS_SPLITUVROW_AVX2
-SplitUVRowANY(SplitUVRow_Any_AVX2, SplitUVRow_Unaligned_AVX2, SplitUVRow_C, 31)
+SPLITUVROWANY(SplitUVRow_Any_AVX2, SplitUVRow_Unaligned_AVX2, SplitUVRow_C, 31)
 #endif
 #ifdef HAS_SPLITUVROW_NEON
-SplitUVRowANY(SplitUVRow_Any_NEON, SplitUVRow_NEON, SplitUVRow_C, 15)
+SPLITUVROWANY(SplitUVRow_Any_NEON, SplitUVRow_NEON, SplitUVRow_C, 15)
 #endif
 #ifdef HAS_SPLITUVROW_MIPS_DSPR2
-SplitUVRowANY(SplitUVRow_Any_MIPS_DSPR2, SplitUVRow_Unaligned_MIPS_DSPR2,
+SPLITUVROWANY(SplitUVRow_Any_MIPS_DSPR2, SplitUVRow_Unaligned_MIPS_DSPR2,
               SplitUVRow_C, 15)
 #endif
-#undef SplitUVRowANY
+#undef SPLITUVROWANY
 
-#define MergeUVRow_ANY(NAMEANY, ANYTOUV_SIMD, ANYTOUV_C, MASK)                 \
+#define MERGEUVROW_ANY(NAMEANY, ANYTOUV_SIMD, ANYTOUV_C, MASK)                 \
     void NAMEANY(const uint8* src_u, const uint8* src_v,                       \
                  uint8* dst_uv, int width) {                                   \
       int n = width & ~MASK;                                                   \
@@ -362,17 +362,17 @@ SplitUVRowANY(SplitUVRow_Any_MIPS_DSPR2, SplitUVRow_Unaligned_MIPS_DSPR2,
     }
 
 #ifdef HAS_MERGEUVROW_SSE2
-MergeUVRow_ANY(MergeUVRow_Any_SSE2, MergeUVRow_Unaligned_SSE2, MergeUVRow_C, 15)
+MERGEUVROW_ANY(MergeUVRow_Any_SSE2, MergeUVRow_Unaligned_SSE2, MergeUVRow_C, 15)
 #endif
 #ifdef HAS_MERGEUVROW_AVX2
-MergeUVRow_ANY(MergeUVRow_Any_AVX2, MergeUVRow_Unaligned_AVX2, MergeUVRow_C, 31)
+MERGEUVROW_ANY(MergeUVRow_Any_AVX2, MergeUVRow_Unaligned_AVX2, MergeUVRow_C, 31)
 #endif
 #ifdef HAS_MERGEUVROW_NEON
-MergeUVRow_ANY(MergeUVRow_Any_NEON, MergeUVRow_NEON, MergeUVRow_C, 15)
+MERGEUVROW_ANY(MergeUVRow_Any_NEON, MergeUVRow_NEON, MergeUVRow_C, 15)
 #endif
-#undef MergeUVRow_ANY
+#undef MERGEUVROW_ANY
 
-#define MultiplyRow_ANY(NAMEANY, ARGBMULT_SIMD, ARGBMULT_C, MASK)              \
+#define MATHROW_ANY(NAMEANY, ARGBMULT_SIMD, ARGBMULT_C, MASK)                  \
     void NAMEANY(const uint8* src_argb0, const uint8* src_argb1,               \
                  uint8* dst_argb, int width) {                                 \
       int n = width & ~MASK;                                                   \
@@ -384,9 +384,13 @@ MergeUVRow_ANY(MergeUVRow_Any_NEON, MergeUVRow_NEON, MergeUVRow_C, 15)
     }
 
 #ifdef HAS_ARGBMULTIPLYROW_SSE2
-MultiplyRow_ANY(ARGBMultiplyRow_Any_SSE2, ARGBMultiplyRow_SSE2,
-                ARGBMultiplyRow_C, 3)
+MATHROW_ANY(ARGBMultiplyRow_Any_SSE2, ARGBMultiplyRow_SSE2, ARGBMultiplyRow_C, 3)
 #endif
+#ifdef HAS_ARGBADDROW_SSE2
+MATHROW_ANY(ARGBAddRow_Any_SSE2, ARGBAddRow_SSE2, ARGBAddRow_C, 3)
+#endif
+#undef MATHROW_ANY
+
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
diff --git a/source/row_common.cc b/source/row_common.cc
index b9f02d0e3..50a399fc8 100644
--- a/source/row_common.cc
+++ b/source/row_common.cc
@@ -727,6 +727,30 @@ void ARGBMultiplyRow_C(const uint8* src_argb0, const uint8* src_argb1,
 #undef REPEAT8
 #undef SHADE
 
+#define SHADE(f, v) ((v + f) > 255) ? 255 : (v + f)
+
+void ARGBAddRow_C(const uint8* src_argb0, const uint8* src_argb1,
+                  uint8* dst_argb, int width) {
+  for (int i = 0; i < width; ++i) {
+    const uint32 b = src_argb0[0];
+    const uint32 g = src_argb0[1];
+    const uint32 r = src_argb0[2];
+    const uint32 a = src_argb0[3];
+    const uint32 b_add = src_argb1[0];
+    const uint32 g_add = src_argb1[1];
+    const uint32 r_add = src_argb1[2];
+    const uint32 a_add = src_argb1[3];
+    dst_argb[0] = SHADE(b, b_add);
+    dst_argb[1] = SHADE(g, g_add);
+    dst_argb[2] = SHADE(r, r_add);
+    dst_argb[3] = SHADE(a, a_add);
+    src_argb0 += 4;
+    src_argb1 += 4;
+    dst_argb += 4;
+  }
+}
+#undef SHADE
+
 void I400ToARGBRow_C(const uint8* src_y, uint8* dst_argb, int width) {
   // Copy a Y to RGB.
   for (int x = 0; x < width; ++x) {
diff --git a/source/row_posix.cc b/source/row_posix.cc
index c710241ff..04be0beb9 100644
--- a/source/row_posix.cc
+++ b/source/row_posix.cc
@@ -3948,10 +3948,10 @@ void ARGBShadeRow_SSE2(const uint8* src_argb, uint8* dst_argb, int width,
     "movdqa    %%xmm0,(%0,%1,1)                \n"
     "lea       0x10(%0),%0                     \n"
     "jg        1b                              \n"
-  : "+r"(src_argb),       // %0
-    "+r"(dst_argb),       // %1
-    "+r"(width)           // %2
-  : "r"(value)            // %3
+  : "+r"(src_argb),  // %0
+    "+r"(dst_argb),  // %1
+    "+r"(width)      // %2
+  : "r"(value)       // %3
   : "memory", "cc"
 #if defined(__SSE2__)
     , "xmm0", "xmm1", "xmm2"
@@ -3961,7 +3961,7 @@ void ARGBShadeRow_SSE2(const uint8* src_argb, uint8* dst_argb, int width,
 #endif  // HAS_ARGBSHADEROW_SSE2
 
 #ifdef HAS_ARGBMULTIPLYROW_SSE2
-// Multiple 2 rows of ARGB pixels together, 4 pixels at a time.
+// Multiply 2 rows of ARGB pixels together, 4 pixels at a time.
 // Aligned to 16 bytes.
 void ARGBMultiplyRow_SSE2(const uint8* src_argb0, const uint8* src_argb1,
                           uint8* dst_argb, int width) {
@@ -3988,8 +3988,8 @@ void ARGBMultiplyRow_SSE2(const uint8* src_argb0, const uint8* src_argb1,
     "movdqa    %%xmm0,(%0,%2,1)                \n"
     "lea       0x10(%0),%0                     \n"
     "jg        1b                              \n"
-  : "+r"(src_argb0),   // %0
-    "+r"(src_argb1),   // %1
+  : "+r"(src_argb0),  // %0
+    "+r"(src_argb1),  // %1
     "+r"(dst_argb),   // %2
     "+r"(width)       // %3
   :
@@ -4001,6 +4001,39 @@ void ARGBMultiplyRow_SSE2(const uint8* src_argb0, const uint8* src_argb1,
 }
 #endif  // HAS_ARGBMULTIPLYROW_SSE2
 
+#ifdef HAS_ARGBADDROW_SSE2
+// Add 2 rows of ARGB pixels together, 4 pixels at a time.
+// Aligned to 16 bytes.
+void ARGBAddRow_SSE2(const uint8* src_argb0, const uint8* src_argb1,
+                     uint8* dst_argb, int width) {
+  asm volatile (
+    "pxor      %%xmm5,%%xmm5                   \n"
+    "sub       %0,%1                           \n"
+    "sub       %0,%2                           \n"
+
+    // 4 pixel loop.
+    ".p2align  4                               \n"
+  "1:                                          \n"
+    "movdqa    (%0),%%xmm0                     \n"
+    "movdqa    (%0,%1),%%xmm1                  \n"
+    "paddusb   %%xmm1,%%xmm0                   \n"
+    "sub       $0x4,%3                         \n"
+    "movdqa    %%xmm0,(%0,%2,1)                \n"
+    "lea       0x10(%0),%0                     \n"
+    "jg        1b                              \n"
+  : "+r"(src_argb0),  // %0
+    "+r"(src_argb1),  // %1
+    "+r"(dst_argb),   // %2
+    "+r"(width)       // %3
+  :
+  : "memory", "cc"
+#if defined(__SSE2__)
+    , "xmm0", "xmm1", "xmm5"
+#endif
+  );
+}
+#endif  // HAS_ARGBADDROW_SSE2
+
 #ifdef HAS_COMPUTECUMULATIVESUMROW_SSE2
 // Creates a table of cumulative sums where each value is a sum of all values
 // above and to the left of the value, inclusive of the value.
diff --git a/source/row_win.cc b/source/row_win.cc
index 5b6b5448b..c66c1ce92 100644
--- a/source/row_win.cc
+++ b/source/row_win.cc
@@ -4277,7 +4277,7 @@ void ARGBShadeRow_SSE2(const uint8* src_argb, uint8* dst_argb, int width,
 #endif  // HAS_ARGBSHADEROW_SSE2
 
 #ifdef HAS_ARGBMULTIPLYROW_SSE2
-// Multiple 2 rows of ARGB pixels together, 4 pixels at a time.
+// Multiply 2 rows of ARGB pixels together, 4 pixels at a time.
 // Aligned to 16 bytes.
 __declspec(naked) __declspec(align(16))
 void ARGBMultiplyRow_SSE2(const uint8* src_argb0, const uint8* src_argb1,
@@ -4294,7 +4294,7 @@ void ARGBMultiplyRow_SSE2(const uint8* src_argb0, const uint8* src_argb1,
 
     align      16
  convertloop:
-    movdqa     xmm0, [eax]      // read 4 pixels from src_argb0
+    movdqa     xmm0, [eax]        // read 4 pixels from src_argb0
     movdqa     xmm2, [eax + esi]  // read 4 pixels from src_argb1
     movdqa     xmm1, xmm0
     movdqa     xmm3, xmm2
@@ -4302,8 +4302,8 @@ void ARGBMultiplyRow_SSE2(const uint8* src_argb0, const uint8* src_argb1,
     punpckhbw  xmm1, xmm1       // next 2
     punpcklbw  xmm2, xmm5       // first 2
     punpckhbw  xmm3, xmm5       // next 2
-    pmulhuw    xmm0, xmm2       // argb * value
-    pmulhuw    xmm1, xmm3       // argb * value
+    pmulhuw    xmm0, xmm2       // src_argb0 * src_argb1 first 2
+    pmulhuw    xmm1, xmm3       // src_argb0 * src_argb1 next 2
     packuswb   xmm0, xmm1
     sub        ecx, 4
     movdqa     [eax + edx], xmm0
@@ -4316,6 +4316,38 @@ void ARGBMultiplyRow_SSE2(const uint8* src_argb0, const uint8* src_argb1,
 }
 #endif  // HAS_ARGBMULTIPLYROW_SSE2
 
+#ifdef HAS_ARGBADDROW_SSE2
+// Add 2 rows of ARGB pixels together, 4 pixels at a time.
+// Aligned to 16 bytes.
+__declspec(naked) __declspec(align(16))
+void ARGBAddRow_SSE2(const uint8* src_argb0, const uint8* src_argb1,
+                     uint8* dst_argb, int width) {
+  __asm {
+    push       esi
+    mov        eax, [esp + 4 + 4]   // src_argb0
+    mov        esi, [esp + 4 + 8]   // src_argb1
+    mov        edx, [esp + 4 + 12]  // dst_argb
+    mov        ecx, [esp + 4 + 16]  // width
+    pxor       xmm5, xmm5  // constant 0
+    sub        esi, eax
+    sub        edx, eax
+
+    align      16
+ convertloop:
+    movdqa     xmm0, [eax]        // read 4 pixels from src_argb0
+    movdqa     xmm1, [eax + esi]  // read 4 pixels from src_argb1
+    paddusb    xmm0, xmm1         // src_argb0 + src_argb1
+    sub        ecx, 4
+    movdqa     [eax + edx], xmm0
+    lea        eax, [eax + 16]
+    jg         convertloop
+
+    pop        esi
+    ret
+  }
+}
+#endif  // HAS_ARGBADDROW_SSE2
+
 #ifdef HAS_CUMULATIVESUMTOAVERAGEROW_SSE2
 // Consider float CumulativeSum.
 // Consider calling CumulativeSum one row at time as needed.
diff --git a/unit_test/planar_test.cc b/unit_test/planar_test.cc
index bfbf1bead..4f90b53c9 100644
--- a/unit_test/planar_test.cc
+++ b/unit_test/planar_test.cc
@@ -968,4 +968,72 @@ TEST_F(libyuvTest, ARGBMultiply_Opt) {
   EXPECT_LE(max_diff, 1);
 }
 
+static int TestAdd(int width, int height, int benchmark_iterations,
+                   int invert, int off) {
+  const int kBpp = 4;
+  const int kStride = (width * kBpp + 15) & ~15;
+  align_buffer_64(src_argb_a, kStride * height + off);
+  align_buffer_64(src_argb_b, kStride * height + off);
+  align_buffer_64(dst_argb_c, kStride * height);
+  align_buffer_64(dst_argb_opt, kStride * height);
+  srandom(time(NULL));
+  for (int i = 0; i < kStride * height; ++i) {
+    src_argb_a[i + off] = (random() & 0xff);
+    src_argb_b[i + off] = (random() & 0xff);
+  }
+  memset(dst_argb_c, 0, kStride * height);
+  memset(dst_argb_opt, 0, kStride * height);
+
+  MaskCpuFlags(0);
+  ARGBAdd(src_argb_a + off, kStride,
+          src_argb_b + off, kStride,
+          dst_argb_c, kStride,
+          width, invert * height);
+  MaskCpuFlags(-1);
+  for (int i = 0; i < benchmark_iterations; ++i) {
+    ARGBAdd(src_argb_a + off, kStride,
+            src_argb_b + off, kStride,
+            dst_argb_opt, kStride,
+            width, invert * height);
+  }
+  int max_diff = 0;
+  for (int i = 0; i < kStride * height; ++i) {
+    int abs_diff =
+        abs(static_cast<int>(dst_argb_c[i]) -
+            static_cast<int>(dst_argb_opt[i]));
+    if (abs_diff > max_diff) {
+      max_diff = abs_diff;
+    }
+  }
+  free_aligned_buffer_64(src_argb_a)
+  free_aligned_buffer_64(src_argb_b)
+  free_aligned_buffer_64(dst_argb_c)
+  free_aligned_buffer_64(dst_argb_opt)
+  return max_diff;
+}
+
+TEST_F(libyuvTest, ARGBAdd_Any) {
+  int max_diff = TestAdd(benchmark_width_ - 1, benchmark_height_,
+                         benchmark_iterations_, +1, 0);
+  EXPECT_LE(max_diff, 1);
+}
+
+TEST_F(libyuvTest, ARGBAdd_Unaligned) {
+  int max_diff = TestAdd(benchmark_width_, benchmark_height_,
+                         benchmark_iterations_, +1, 1);
+  EXPECT_LE(max_diff, 1);
+}
+
+TEST_F(libyuvTest, ARGBAdd_Invert) {
+  int max_diff = TestAdd(benchmark_width_, benchmark_height_,
+                         benchmark_iterations_, -1, 0);
+  EXPECT_LE(max_diff, 1);
+}
+
+TEST_F(libyuvTest, ARGBAdd_Opt) {
+  int max_diff = TestAdd(benchmark_width_, benchmark_height_,
+                         benchmark_iterations_, +1, 0);
+  EXPECT_LE(max_diff, 1);
+}
+
 }  // namespace libyuv