Adds support for UseDartApi vm test on MIPS.

runtime/vm/simulator_mips.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <math.h>  // for isnan.
 #include <setjmp.h>
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_MIPS)
@@ skipping 1664 matching lines @@
       int32_t imm_val = instr->SImmField();
       uword addr = base_val + imm_val;
       if (Simulator::IsIllegalAddress(addr)) {
         HandleIllegalAccess(addr, instr);
       } else {
         int32_t value = get_fregister(instr->FtField());
         WriteW(addr, value, instr);
       }
       break;
     }
+    case XORI: {
+      // Format(instr, "xori 'rt, 'rs, 'immu");
+      int32_t rs_val = get_register(instr->RsField());
+      set_register(instr->RtField(), rs_val ^ instr->UImmField());
+      break;
+      break;
+    }
     default: {
       OS::PrintErr("Undecoded instruction: 0x%x at %p\n",
                     instr->InstructionBits(), instr);
       UnimplementedInstruction(instr);
       break;
     }
   }
   pc_ += Instr::kInstrSize;
 }
 
@@ skipping 125 matching lines @@
   // Restore the SP register and return R1:R0.
   set_register(SP, sp_before_call);
   return Utils::LowHighTo64Bits(get_register(V0), get_register(V1));
 }
 
 }  // namespace dart
 
 #endif  // !defined(HOST_ARCH_MIPS)
 
 #endif  // defined TARGET_ARCH_MIPS