Replace some calls to MemCopy with small constant sizes with memcpy

src/mips/assembler-mips.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 1657 matching lines @@
 }
 
 
 void Assembler::cfc1(Register rt, FPUControlRegister fs) {
   GenInstrRegister(COP1, CFC1, rt, fs);
 }
 
 
 void Assembler::DoubleAsTwoUInt32(double d, uint32_t* lo, uint32_t* hi) {
   uint64_t i;
-  MemCopy(&i, &d, 8);
+  memcpy(&i, &d, 8);
 
   *lo = i & 0xffffffff;
   *hi = i >> 32;
 }
 
 
 // Arithmetic.
 
 void Assembler::add_d(FPURegister fd, FPURegister fs, FPURegister ft) {
   GenInstrRegister(COP1, D, ft, fs, fd, ADD_D);
@@ skipping 623 matching lines @@
 void Assembler::PopulateConstantPool(ConstantPoolArray* constant_pool) {
   // No out-of-line constant pool support.
   ASSERT(!FLAG_enable_ool_constant_pool);
   return;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS