Use sse4.2 CRC32 instructions to hash when available.

src/gpu/effects/GrTextureStripAtlas.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTextureStripAtlas_DEFINED
 #define GrTextureStripAtlas_DEFINED
 
 #include "SkBitmap.h"
-#include "SkChecksum.h"
+#include "SkOpts.h"
 #include "SkGr.h"
 #include "SkTDArray.h"
 #include "SkTDynamicHash.h"
 #include "SkTypes.h"
 
 /**
  * Maintains a single large texture whose rows store many textures of a small fixed height,
  * stored in rows across the x-axis such that we can safely wrap/repeat them horizontally.
  */
 class GrTextureStripAtlas {
@@ skipping 112 matching lines @@
      * Clean up callback registered with GrContext. Allows this class to
      * free up any allocated AtlasEntry and GrTextureStripAtlas objects
      */
     static void CleanUp(const GrContext* context, void* info);
 
     // Hash table entry for atlases
     class AtlasEntry : public ::SkNoncopyable {
     public:
         // for SkTDynamicHash
         static const Desc& GetKey(const AtlasEntry& entry) { return entry.fDesc; }
-        static uint32_t Hash(const Desc& desc) { return SkChecksum::Murmur3(&desc, sizeof(Desc)); }
+        static uint32_t Hash(const Desc& desc) { return SkOpts::hash(&desc, sizeof(Desc)); }
 
         // AtlasEntry proper
         AtlasEntry() : fAtlas(nullptr) {}
         ~AtlasEntry() { delete fAtlas; }
         Desc fDesc;
         GrTextureStripAtlas* fAtlas;
     };
 
     class Hash;
     static Hash* gAtlasCache;
@@ skipping 24 matching lines @@
     // Head and tail for linked list of least-recently-used rows (front = least recently used).
     // Note that when a texture is locked, it gets removed from this list until it is unlocked.
     AtlasRow* fLRUFront;
     AtlasRow* fLRUBack;
 
     // A list of pointers to AtlasRows that currently contain cached images, sorted by key
     SkTDArray<AtlasRow*> fKeyTable;
 };
 
 #endif