SSSE3 scaling test detect SSSE3 before running

Bug: libyuv:755
Test: ~/intelsde/sde -p4p -- out/Release/libyuv_unittest --gtest_filter=LibYUVScaleTest*
Change-Id: Ibb0c908c38efc49dc56e86fa54ae7bd48ced02b5
Reviewed-on: https://chromium-review.googlesource.com/756363Reviewed-by: Cheng Wang <wangcheng@google.com>

unit_test/scale_test.cc

@@ -366,7 +366,7 @@ TEST_SCALETO(Scale, 1280, 720)
 #undef TEST_SCALETO
 
 #ifdef HAS_SCALEROWDOWN2_SSSE3
-TEST_F(LibYUVScaleTest, TestScaleOdd) {
+TEST_F(LibYUVScaleTest, TestScaleRowDown2Box_Odd_SSSE3) {
   SIMD_ALIGNED(uint8 orig_pixels[128 * 2]);
   SIMD_ALIGNED(uint8 dst_pixels_opt[64]);
   SIMD_ALIGNED(uint8 dst_pixels_c[64]);
@@ -374,78 +374,83 @@ TEST_F(LibYUVScaleTest, TestScaleOdd) {
   memset(dst_pixels_opt, 0, sizeof(dst_pixels_opt));
   memset(dst_pixels_c, 0, sizeof(dst_pixels_c));
 
-  // TL
-  orig_pixels[0] = 255u;
-  orig_pixels[1] = 0u;
-  orig_pixels[128 + 0] = 0u;
-  orig_pixels[128 + 1] = 0u;
-  // TR
-  orig_pixels[2] = 0u;
-  orig_pixels[3] = 100u;
-  orig_pixels[128 + 2] = 0u;
-  orig_pixels[128 + 3] = 0u;
-  // BL
-  orig_pixels[4] = 0u;
-  orig_pixels[5] = 0u;
-  orig_pixels[128 + 4] = 50u;
-  orig_pixels[128 + 5] = 0u;
-  // BR
-  orig_pixels[6] = 0u;
-  orig_pixels[7] = 0u;
-  orig_pixels[128 + 6] = 0u;
-  orig_pixels[128 + 7] = 20u;
-  // Odd
-  orig_pixels[126] = 4u;
-  orig_pixels[127] = 255u;
-  orig_pixels[128 + 126] = 16u;
-  orig_pixels[128 + 127] = 255u;
-
-  // Test regular half size.
-  ScaleRowDown2Box_C(orig_pixels, 128, dst_pixels_c, 64);
-
-  EXPECT_EQ(64u, dst_pixels_c[0]);
-  EXPECT_EQ(25u, dst_pixels_c[1]);
-  EXPECT_EQ(13u, dst_pixels_c[2]);
-  EXPECT_EQ(5u, dst_pixels_c[3]);
-  EXPECT_EQ(0u, dst_pixels_c[4]);
-  EXPECT_EQ(133u, dst_pixels_c[63]);
-
-  // Test Odd width version - Last pixel is just 1 horizontal pixel.
-  ScaleRowDown2Box_Odd_C(orig_pixels, 128, dst_pixels_c, 64);
-
-  EXPECT_EQ(64u, dst_pixels_c[0]);
-  EXPECT_EQ(25u, dst_pixels_c[1]);
-  EXPECT_EQ(13u, dst_pixels_c[2]);
-  EXPECT_EQ(5u, dst_pixels_c[3]);
-  EXPECT_EQ(0u, dst_pixels_c[4]);
-  EXPECT_EQ(10u, dst_pixels_c[63]);
-
-  // Test one pixel less, should skip the last pixel.
-  memset(dst_pixels_c, 0, sizeof(dst_pixels_c));
-  ScaleRowDown2Box_Odd_C(orig_pixels, 128, dst_pixels_c, 63);
-
-  EXPECT_EQ(64u, dst_pixels_c[0]);
-  EXPECT_EQ(25u, dst_pixels_c[1]);
-  EXPECT_EQ(13u, dst_pixels_c[2]);
-  EXPECT_EQ(5u, dst_pixels_c[3]);
-  EXPECT_EQ(0u, dst_pixels_c[4]);
-  EXPECT_EQ(0u, dst_pixels_c[63]);
-
-  // Test regular half size SSSE3.
-  ScaleRowDown2Box_SSSE3(orig_pixels, 128, dst_pixels_opt, 64);
-
-  EXPECT_EQ(64u, dst_pixels_opt[0]);
-  EXPECT_EQ(25u, dst_pixels_opt[1]);
-  EXPECT_EQ(13u, dst_pixels_opt[2]);
-  EXPECT_EQ(5u, dst_pixels_opt[3]);
-  EXPECT_EQ(0u, dst_pixels_opt[4]);
-  EXPECT_EQ(133u, dst_pixels_opt[63]);
-
-  // Compare C and SSSE3 match.
-  ScaleRowDown2Box_Odd_C(orig_pixels, 128, dst_pixels_c, 64);
-  ScaleRowDown2Box_Odd_SSSE3(orig_pixels, 128, dst_pixels_opt, 64);
-  for (int i = 0; i < 64; ++i) {
-    EXPECT_EQ(dst_pixels_c[i], dst_pixels_opt[i]);
+  int has_ssse3 = TestCpuFlag(kCpuHasSSSE3);
+  if (!has_ssse3) {
+    printf("Warning SSSE3 not detected; Skipping test.\n");
+  } else {
+    // TL
+    orig_pixels[0] = 255u;
+    orig_pixels[1] = 0u;
+    orig_pixels[128 + 0] = 0u;
+    orig_pixels[128 + 1] = 0u;
+    // TR
+    orig_pixels[2] = 0u;
+    orig_pixels[3] = 100u;
+    orig_pixels[128 + 2] = 0u;
+    orig_pixels[128 + 3] = 0u;
+    // BL
+    orig_pixels[4] = 0u;
+    orig_pixels[5] = 0u;
+    orig_pixels[128 + 4] = 50u;
+    orig_pixels[128 + 5] = 0u;
+    // BR
+    orig_pixels[6] = 0u;
+    orig_pixels[7] = 0u;
+    orig_pixels[128 + 6] = 0u;
+    orig_pixels[128 + 7] = 20u;
+    // Odd
+    orig_pixels[126] = 4u;
+    orig_pixels[127] = 255u;
+    orig_pixels[128 + 126] = 16u;
+    orig_pixels[128 + 127] = 255u;
+
+    // Test regular half size.
+    ScaleRowDown2Box_C(orig_pixels, 128, dst_pixels_c, 64);
+
+    EXPECT_EQ(64u, dst_pixels_c[0]);
+    EXPECT_EQ(25u, dst_pixels_c[1]);
+    EXPECT_EQ(13u, dst_pixels_c[2]);
+    EXPECT_EQ(5u, dst_pixels_c[3]);
+    EXPECT_EQ(0u, dst_pixels_c[4]);
+    EXPECT_EQ(133u, dst_pixels_c[63]);
+
+    // Test Odd width version - Last pixel is just 1 horizontal pixel.
+    ScaleRowDown2Box_Odd_C(orig_pixels, 128, dst_pixels_c, 64);
+
+    EXPECT_EQ(64u, dst_pixels_c[0]);
+    EXPECT_EQ(25u, dst_pixels_c[1]);
+    EXPECT_EQ(13u, dst_pixels_c[2]);
+    EXPECT_EQ(5u, dst_pixels_c[3]);
+    EXPECT_EQ(0u, dst_pixels_c[4]);
+    EXPECT_EQ(10u, dst_pixels_c[63]);
+
+    // Test one pixel less, should skip the last pixel.
+    memset(dst_pixels_c, 0, sizeof(dst_pixels_c));
+    ScaleRowDown2Box_Odd_C(orig_pixels, 128, dst_pixels_c, 63);
+
+    EXPECT_EQ(64u, dst_pixels_c[0]);
+    EXPECT_EQ(25u, dst_pixels_c[1]);
+    EXPECT_EQ(13u, dst_pixels_c[2]);
+    EXPECT_EQ(5u, dst_pixels_c[3]);
+    EXPECT_EQ(0u, dst_pixels_c[4]);
+    EXPECT_EQ(0u, dst_pixels_c[63]);
+
+    // Test regular half size SSSE3.
+    ScaleRowDown2Box_SSSE3(orig_pixels, 128, dst_pixels_opt, 64);
+
+    EXPECT_EQ(64u, dst_pixels_opt[0]);
+    EXPECT_EQ(25u, dst_pixels_opt[1]);
+    EXPECT_EQ(13u, dst_pixels_opt[2]);
+    EXPECT_EQ(5u, dst_pixels_opt[3]);
+    EXPECT_EQ(0u, dst_pixels_opt[4]);
+    EXPECT_EQ(133u, dst_pixels_opt[63]);
+
+    // Compare C and SSSE3 match.
+    ScaleRowDown2Box_Odd_C(orig_pixels, 128, dst_pixels_c, 64);
+    ScaleRowDown2Box_Odd_SSSE3(orig_pixels, 128, dst_pixels_opt, 64);
+    for (int i = 0; i < 64; ++i) {
+      EXPECT_EQ(dst_pixels_c[i], dst_pixels_opt[i]);
+    }
   }
 }
 #endif  // HAS_SCALEROWDOWN2_SSSE3