sk_memcpy32 should fall back on libc memcpy.

src/core/SkUtils.cpp

Index: src/core/SkUtils.cpp
diff --git a/src/core/SkUtils.cpp b/src/core/SkUtils.cpp
index c65947dfe933e2a544b0da227421bf5e39e822ad..ca18e0cb2d08138c64f16ff48d5e6d3e2fe32fb1 100644
--- a/src/core/SkUtils.cpp
+++ b/src/core/SkUtils.cpp
@@ -34,18 +34,6 @@
         *(dst)++ = value;   *(dst)++ = value;   \
         *(dst)++ = value;   *(dst)++ = value;   \
     } while (0)
-
-#define copy_16_longs(dst, src)                       \
-    do {                                              \
-        *(dst)++ = *(src)++;   *(dst)++ = *(src)++;   \
-        *(dst)++ = *(src)++;   *(dst)++ = *(src)++;   \
-        *(dst)++ = *(src)++;   *(dst)++ = *(src)++;   \
-        *(dst)++ = *(src)++;   *(dst)++ = *(src)++;   \
-        *(dst)++ = *(src)++;   *(dst)++ = *(src)++;   \
-        *(dst)++ = *(src)++;   *(dst)++ = *(src)++;   \
-        *(dst)++ = *(src)++;   *(dst)++ = *(src)++;   \
-        *(dst)++ = *(src)++;   *(dst)++ = *(src)++;   \
-    } while (0)
 #endif
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -122,21 +110,7 @@ static void sk_memset32_portable(uint32_t dst[], uint32_t value, int count) {
 }
 
 static void sk_memcpy32_portable(uint32_t dst[], const uint32_t src[], int count) {
-    SkASSERT(dst != NULL && count >= 0);
-
-    int sixteenlongs = count >> 4;
-    if (sixteenlongs) {
-        do {
-            copy_16_longs(dst, src);
-        } while (--sixteenlongs != 0);
-        count &= 15;
-    }
-
-    if (count) {
-        do {
-            *dst++ = *src++;
-        } while (--count != 0);
-    }
+    memcpy(dst, src, count * sizeof(uint32_t));
 }
 
 static void choose_memset16(SkMemset16Proc* proc) {