MIPS: Added the stop() instruction with same behavior as on Arm simulator.

src/mips/assembler-mips.h

Index: src/mips/assembler-mips.h
diff --git a/src/mips/assembler-mips.h b/src/mips/assembler-mips.h
index a1673934384cdfcce63f8882dc00a74f5364a3d2..f40cfc2cd83297025a7d2bd16cc42652081ccadf 100644
--- a/src/mips/assembler-mips.h
+++ b/src/mips/assembler-mips.h
@@ -675,7 +675,8 @@ class Assembler : public AssemblerBase {
   //-------------Misc-instructions--------------
 
   // Break / Trap instructions.
-  void break_(uint32_t code);
+  void break_(uint32_t code, bool break_as_stop = false);
+  void stop(const char* msg, uint32_t code = kMaxStopCode);
   void tge(Register rs, Register rt, uint16_t code);
   void tgeu(Register rs, Register rt, uint16_t code);
   void tlt(Register rs, Register rt, uint16_t code);