Revert 23028 - "MIPS: Add support for arch. revision 6 to mips32 port."

src/mips/codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/codegen.h"
 #include "src/macro-assembler.h"
@@ skipping 55 matching lines @@
   return FUNCTION_CAST<UnaryMathFunction>(buffer);
 #else
   fast_exp_mips_machine_code = buffer;
   return &fast_exp_simulator;
 #endif
 }
 
 
 #if defined(V8_HOST_ARCH_MIPS)
 MemCopyUint8Function CreateMemCopyUint8Function(MemCopyUint8Function stub) {
-#if defined(USE_SIMULATOR) || defined(_MIPS_ARCH_MIPS32R6) || \
-    defined(_MIPS_ARCH_MIPS32RX)
+#if defined(USE_SIMULATOR)
   return stub;
 #else
   size_t actual_size;
   byte* buffer =
       static_cast<byte*>(base::OS::Allocate(3 * KB, &actual_size, true));
   if (buffer == NULL) return stub;
 
   // This code assumes that cache lines are 32 bytes and if the cache line is
   // larger it will not work correctly.
   MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
@@ skipping 1155 matching lines @@
     patcher.masm()->nop();  // Pad the empty space.
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS