Add SSSE3 acceleration for S32_D16_filter_DX

src/opts/opts_check_x86.cpp

Index: src/opts/opts_check_x86.cpp
diff --git a/src/opts/opts_check_x86.cpp b/src/opts/opts_check_x86.cpp
index 34aae928eb18e07d17669bb3cd3cc4b37c52831d..84041d05b0c8ba32494431f5c3c7ac1d94b9f854 100644
--- a/src/opts/opts_check_x86.cpp
+++ b/src/opts/opts_check_x86.cpp
@@ -176,7 +176,11 @@ void SkBitmapProcState::platformProcs() {
 
     /* Check fSampleProc16 */
     if (fSampleProc16 == S32_D16_filter_DX) {
-        fSampleProc16 = S32_D16_filter_DX_SSE2;
+        if (ssse3) {
+            fSampleProc16 = S32_D16_filter_DX_SSSE3;
+        } else {
+            fSampleProc16 = S32_D16_filter_DX_SSE2;
+        }
     } else if (ssse3 && fSampleProc16 == S32_D16_filter_DXDY) {
         fSampleProc16 = S32_D16_filter_DXDY_SSSE3;
     }