MIPS64: Optimize simulator.

src/mips64/disasm-mips64.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.
 
 // A Disassembler object is used to disassemble a block of code instruction by
 // instruction. The default implementation of the NameConverter object can be
 // overriden to modify register names or to do symbol lookup on addresses.
 //
 // The example below will disassemble a block of code and print it to stdout.
 //
@@ skipping 1810 matching lines @@
 // Disassemble the instruction at *instr_ptr into the output buffer.
 // All instructions are one word long, except for the simulator
 // psuedo-instruction stop(msg). For that one special case, we return
 // size larger than one kInstrSize.
 int Decoder::InstructionDecode(byte* instr_ptr) {
   Instruction* instr = Instruction::At(instr_ptr);
   // Print raw instruction bytes.
   out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_,
                               "%08x       ",
                               instr->InstructionBits());
-  switch (instr->InstructionType()) {
+  switch (instr->InstructionType(Instruction::TypeChecks::EXTRA)) {
     case Instruction::kRegisterType: {
       return DecodeTypeRegister(instr);
     }
     case Instruction::kImmediateType: {
       DecodeTypeImmediate(instr);
       break;
     }
     case Instruction::kJumpType: {
       DecodeTypeJump(instr);
       break;
@@ skipping 83 matching lines @@
         prev_pc, *reinterpret_cast<int32_t*>(prev_pc), buffer.start());
   }
 }
 
 
 #undef UNSUPPORTED
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_MIPS64