Revert of Properly enable S32_D16_filter_DX_SSE2 optimization. (https://codereview.chromium.org/239453010/)

Reason for revert:
Broke GMs in 565 mode. To repro:
out/Debug/gm --match filterbitmap_image_mandrill -w . --config 565
open filterbitmap_image_mandrill_512.png_565.png

Original issue's description:
> Properly enable S32_D16_filter_DX_SSE2 optimization.
>
> Currently, the S32_D16_filter_DX_SSE2 optimization is only used in
> configurations where the maximum SSE level is SSE2.
> This patch enables it for higher levels, as well.
> Also, refactored the function a bit, to make future modifications
> less error-prone.
>
> Author: henrik.smiding@intel.com
>
> Signed-off-by: Henrik Smiding <henrik.smiding@intel.com>
>
> Committed: http://code.google.com/p/skia/source/detail?r=14333

R=reed@google.com, mtklein@google.com, tomhudson@google.com, djsollen@google.com, joakim.landberg@intel.com, henrik.smiding@intel.com
TBR=djsollen@google.com, henrik.smiding@intel.com, joakim.landberg@intel.com, mtklein@google.com, reed@google.com, tomhudson@google.com
NOTREECHECKS=true
NOTRY=true

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/246393013

git-svn-id: http://skia.googlecode.com/svn/trunk@14336 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 30 insertions, 38 deletions

diff --git a/src/opts/opts_check_SSE2.cpp b/src/opts/opts_check_SSE2.cpp
index 64a087bd61..e7677220cb 100644
--- a/src/opts/opts_check_SSE2.cpp
+++ b/src/opts/opts_check_SSE2.cpp
@@ -123,54 +123,46 @@ void SkBitmapProcState::platformConvolutionProcs(SkConvolutionProcs* procs) {
 }
 
 void SkBitmapProcState::platformProcs() {
-    /* Every optimization in the function requires at least SSE2 */
-    if (!cachedHasSSE2()) {
-        return;
-    }
-
-    /* Check fSampleProc32 */
-    if (fSampleProc32 == S32_opaque_D32_filter_DX) {
-        if (cachedHasSSSE3()) {
+    if (cachedHasSSSE3()) {
+        if (fSampleProc32 == S32_opaque_D32_filter_DX) {
             fSampleProc32 = S32_opaque_D32_filter_DX_SSSE3;
-        } else {
-            fSampleProc32 = S32_opaque_D32_filter_DX_SSE2;
+        } else if (fSampleProc32 == S32_alpha_D32_filter_DX) {
+            fSampleProc32 = S32_alpha_D32_filter_DX_SSSE3;
         }
-    } else if (fSampleProc32 == S32_opaque_D32_filter_DXDY) {
-        if (cachedHasSSSE3()) {
+
+        if (fSampleProc32 == S32_opaque_D32_filter_DXDY) {
             fSampleProc32 = S32_opaque_D32_filter_DXDY_SSSE3;
+        } else if (fSampleProc32 == S32_alpha_D32_filter_DXDY) {
+            fSampleProc32 = S32_alpha_D32_filter_DXDY_SSSE3;
         }
-    } else if (fSampleProc32 == S32_alpha_D32_filter_DX) {
-        if (cachedHasSSSE3()) {
-            fSampleProc32 = S32_alpha_D32_filter_DX_SSSE3;
-        } else {
+    } else if (cachedHasSSE2()) {
+        if (fSampleProc32 == S32_opaque_D32_filter_DX) {
+            fSampleProc32 = S32_opaque_D32_filter_DX_SSE2;
+        } else if (fSampleProc32 == S32_alpha_D32_filter_DX) {
             fSampleProc32 = S32_alpha_D32_filter_DX_SSE2;
         }
-    } else if (fSampleProc32 == S32_alpha_D32_filter_DXDY) {
-        if (cachedHasSSSE3()) {
-            fSampleProc32 = S32_alpha_D32_filter_DXDY_SSSE3;
-        }
-    }
 
-    /* Check fSampleProc16 */
-    if (fSampleProc16 == S32_D16_filter_DX) {
-        fSampleProc16 = S32_D16_filter_DX_SSE2;
+        if (fSampleProc16 == S32_D16_filter_DX) {
+            fSampleProc16 = S32_D16_filter_DX_SSE2;
+        }
     }
 
-    /* Check fMatrixProc */
-    if (fMatrixProc == ClampX_ClampY_filter_scale) {
-        fMatrixProc = ClampX_ClampY_filter_scale_SSE2;
-    } else if (fMatrixProc == ClampX_ClampY_nofilter_scale) {
-        fMatrixProc = ClampX_ClampY_nofilter_scale_SSE2;
-    } else if (fMatrixProc == ClampX_ClampY_filter_affine) {
-        fMatrixProc = ClampX_ClampY_filter_affine_SSE2;
-    } else if (fMatrixProc == ClampX_ClampY_nofilter_affine) {
-        fMatrixProc = ClampX_ClampY_nofilter_affine_SSE2;
-    }
+    if (cachedHasSSSE3() || cachedHasSSE2()) {
+        if (fMatrixProc == ClampX_ClampY_filter_scale) {
+            fMatrixProc = ClampX_ClampY_filter_scale_SSE2;
+        } else if (fMatrixProc == ClampX_ClampY_nofilter_scale) {
+            fMatrixProc = ClampX_ClampY_nofilter_scale_SSE2;
+        }
 
-    /* Check fShaderProc32 */
-    if (c_hqfilter_sse) {
-        if (fShaderProc32 == highQualityFilter32) {
-            fShaderProc32 = highQualityFilter_SSE2;
+        if (fMatrixProc == ClampX_ClampY_filter_affine) {
+            fMatrixProc = ClampX_ClampY_filter_affine_SSE2;
+        } else if (fMatrixProc == ClampX_ClampY_nofilter_affine) {
+            fMatrixProc = ClampX_ClampY_nofilter_affine_SSE2;
+        }
+        if (c_hqfilter_sse) {
+            if (fShaderProc32 == highQualityFilter32) {
+                fShaderProc32 = highQualityFilter_SSE2;
+            }
         }
     }
 }