diff --git a/vp8/common/idctllm_test.cc b/vp8/common/idctllm_test.cc
new file mode 100755
index 0000000000000000000000000000000000000000..0f6ebe7fe83260c5c8b48d49b070056d6b276074
--- /dev/null
+++ b/vp8/common/idctllm_test.cc
@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+
+
+ extern "C" {
+ void vp8_short_idct4x4llm_c(short *input, unsigned char *pred_ptr,
+ int pred_stride, unsigned char *dst_ptr,
+ int dst_stride);
+}
+
+#include "vpx_config.h"
+#include "idctllm_test.h"
+namespace
+{
+
+INSTANTIATE_TEST_CASE_P(C, IDCTTest,
+ ::testing::Values(vp8_short_idct4x4llm_c));
+
+} // namespace
+
+int main(int argc, char **argv) {
+ ::testing::InitGoogleTest(&argc, argv);
+ return RUN_ALL_TESTS();
+}
diff --git a/vp8/common/idctllm_test.h b/vp8/common/idctllm_test.h
new file mode 100755
index 0000000000000000000000000000000000000000..a6a694b18a74021a9fa2f30c53ca3e9fbae54472
--- /dev/null
+++ b/vp8/common/idctllm_test.h
@@ -0,0 +1,113 @@
+/*
+ * 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.
+ */
+
+
+ #include "third_party/googletest/src/include/gtest/gtest.h"
+typedef void (*idct_fn_t)(short *input, unsigned char *pred_ptr,
+ int pred_stride, unsigned char *dst_ptr,
+ int dst_stride);
+namespace {
+class IDCTTest : public ::testing::TestWithParam<idct_fn_t>
+{
+ protected:
+ virtual void SetUp()
+ {
+ int i;
+
+ UUT = GetParam();
+ memset(input, 0, sizeof(input));
+ /* Set up guard blocks */
+ for(i=0; i<256; i++)
+ output[i] = ((i&0xF)<4&&(i<64))?0:-1;
+ }
+
+ idct_fn_t UUT;
+ short input[16];
+ unsigned char output[256];
+ unsigned char predict[256];
+};
+
+TEST_P(IDCTTest, TestGuardBlocks)
+{
+ int i;
+
+ for(i=0; i<256; i++)
+ if((i&0xF) < 4 && i<64)
+ EXPECT_EQ(0, output[i]) << i;
+ else
+ EXPECT_EQ(255, output[i]);
+}
+
+TEST_P(IDCTTest, TestAllZeros)
+{
+ int i;
+
+ UUT(input, output, 16, output, 16);
+
+ for(i=0; i<256; i++)
+ if((i&0xF) < 4 && i<64)
+ EXPECT_EQ(0, output[i]) << "i==" << i;
+ else
+ EXPECT_EQ(255, output[i]) << "i==" << i;
+}
+
+TEST_P(IDCTTest, TestAllOnes)
+{
+ int i;
+
+ input[0] = 4;
+ UUT(input, output, 16, output, 16);
+
+ for(i=0; i<256; i++)
+ if((i&0xF) < 4 && i<64)
+ EXPECT_EQ(1, output[i]) << "i==" << i;
+ else
+ EXPECT_EQ(255, output[i]) << "i==" << i;
+}
+
+TEST_P(IDCTTest, TestAddOne)
+{
+ int i;
+
+ for(i=0; i<256; i++)
+ predict[i] = i;
+
+ input[0] = 4;
+ UUT(input, predict, 16, output, 16);
+
+ for(i=0; i<256; i++)
+ if((i&0xF) < 4 && i<64)
+ EXPECT_EQ(i+1, output[i]) << "i==" << i;
+ else
+ EXPECT_EQ(255, output[i]) << "i==" << i;
+}
+
+TEST_P(IDCTTest, TestWithData)
+{
+ int i;
+
+ for(i=0; i<16; i++)
+ input[i] = i;
+
+ UUT(input, output, 16, output, 16);
+
+ for(i=0; i<256; i++)
+ if((i&0xF) > 3 || i>63)
+ EXPECT_EQ(255, output[i]) << "i==" << i;
+ else if(i == 0)
+ EXPECT_EQ(11, output[i]) << "i==" << i;
+ else if(i == 34)
+ EXPECT_EQ(1, output[i]) << "i==" << i;
+ else if(i == 2 || i == 17 || i == 32)
+ EXPECT_EQ(3, output[i]) << "i==" << i;
+ else
+ EXPECT_EQ(0, output[i]) << "i==" << i;
+}
+}
diff --git a/vp8/common/x86/idctllm_mmx_test.cc b/vp8/common/x86/idctllm_mmx_test.cc
new file mode 100755
index 0000000000000000000000000000000000000000..8c115335ebbeb4f71c440ea4da6a384a363e1aeb
--- /dev/null
+++ b/vp8/common/x86/idctllm_mmx_test.cc
@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+
+
+ extern "C" {
+ void vp8_short_idct4x4llm_mmx(short *input, unsigned char *pred_ptr,
+ int pred_stride, unsigned char *dst_ptr,
+ int dst_stride);
+}
+
+#include "vp8/common/idctllm_test.h"
+
+namespace
+{
+
+INSTANTIATE_TEST_CASE_P(MMX, IDCTTest,
+ ::testing::Values(vp8_short_idct4x4llm_mmx));
+
+} // namespace
+
+int main(int argc, char **argv) {
+ ::testing::InitGoogleTest(&argc, argv);
+ return RUN_ALL_TESTS();
+}
diff --git a/vp8/vp8_common.mk b/vp8/vp8_common.mk
index b2db4ce5b59b34ce850498c4b97220d2e8e29740..a200b22656d1e624ceee4fd67397024a3d651822 100644
--- a/vp8/vp8_common.mk
+++ b/vp8/vp8_common.mk
@@ -30,6 +30,7 @@ VP8_COMMON_SRCS-yes += common/findnearmv.c
VP8_COMMON_SRCS-yes += common/generic/systemdependent.c
VP8_COMMON_SRCS-yes += common/idct_blk.c
VP8_COMMON_SRCS-yes += common/idctllm.c
+VP8_COMMON_SRCS-yes += common/idctllm_test.cc
VP8_COMMON_SRCS-yes += common/alloccommon.h
VP8_COMMON_SRCS-yes += common/blockd.h
VP8_COMMON_SRCS-yes += common/common.h
@@ -80,6 +81,7 @@ VP8_COMMON_SRCS-$(CONFIG_POSTPROC) += common/postproc.c
VP8_COMMON_SRCS-$(HAVE_MMX) += common/x86/dequantize_mmx.asm
VP8_COMMON_SRCS-$(HAVE_MMX) += common/x86/idct_blk_mmx.c
VP8_COMMON_SRCS-$(HAVE_MMX) += common/x86/idctllm_mmx.asm
+VP8_COMMON_SRCS-$(HAVE_MMX) += common/x86/idctllm_mmx_test.cc
VP8_COMMON_SRCS-$(HAVE_MMX) += common/x86/iwalsh_mmx.asm
VP8_COMMON_SRCS-$(HAVE_MMX) += common/x86/recon_mmx.asm
VP8_COMMON_SRCS-$(HAVE_MMX) += common/x86/subpixel_mmx.asm