Rewrite memset benches, then use results to add a small-N optimization.

src/core/SkUtils.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkUtils.h"
@@ skipping 116 matching lines @@
     return proc ? proc : sk_memset32_portable;
 }
 
 SkMemcpy32Proc choose_memcpy32() {
     SkMemcpy32Proc proc = SkMemcpy32GetPlatformProc();
     return proc ? proc : sk_memcpy32_portable;
 }
 
 }  // namespace
 
-void sk_memset16(uint16_t dst[], uint16_t value, int count) {
+void sk_memset16_large(uint16_t dst[], uint16_t value, int count) {
     SK_DECLARE_STATIC_LAZY_FN_PTR(SkMemset16Proc, proc, choose_memset16);
     proc.get()(dst, value, count);
 }
 
-void sk_memset32(uint32_t dst[], uint32_t value, int count) {
+void sk_memset32_large(uint32_t dst[], uint32_t value, int count) {
     SK_DECLARE_STATIC_LAZY_FN_PTR(SkMemset32Proc, proc, choose_memset32);
     proc.get()(dst, value, count);
 }
 
 void sk_memcpy32(uint32_t dst[], const uint32_t src[], int count) {
     SK_DECLARE_STATIC_LAZY_FN_PTR(SkMemcpy32Proc, proc, choose_memcpy32);
     proc.get()(dst, src, count);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 260 matching lines @@
         }
     } else {
         char* start = utf8;
         while (utf16 < stop) {
             utf8 += SkUTF8_FromUnichar(SkUTF16_NextUnichar(&utf16), utf8);
         }
         size = utf8 - start;
     }
     return size;
 }