MIPS: Add rounding support in simulator and RINT instruction.

src/mips/disasm-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.
 
 // 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 469 matching lines @@
 
 // For currently unimplemented decodings the disassembler calls Unknown(instr)
 // which will just print "unknown" of the instruction bits.
 void Decoder::Unknown(Instruction* instr) {
   Format(instr, "unknown");
 }
 
 
 bool Decoder::DecodeTypeRegisterRsType(Instruction* instr) {
   switch (instr->FunctionFieldRaw()) {
+    case RINT:
+      Format(instr, "rint.'t    'fd, 'fs");
+      break;
     case MIN:
       Format(instr, "min.'t    'fd, 'fs, 'ft");
       break;
     case MAX:
       Format(instr, "max.'t    'fd, 'fs, 'ft");
       break;
     case MINA:
       Format(instr, "mina.'t   'fd, 'fs, 'ft");
       break;
     case MAXA:
@@ skipping 852 matching lines @@
         prev_pc, *reinterpret_cast<int32_t*>(prev_pc), buffer.start());
   }
 }
 
 
 #undef UNSUPPORTED
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_MIPS