MIPS: Add rounding support in simulator and RINT instruction.

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 1e5748c27d5131b42ad6b98298ba331c31fbf132..374afc00dc28c2c40b7339e8948aacd7e259bd3d 100644
--- a/src/mips/assembler-mips.h
+++ b/src/mips/assembler-mips.h
@@ -912,6 +912,9 @@ class Assembler : public AssemblerBase {
   void floor_w_d(FPURegister fd, FPURegister fs);
   void ceil_w_s(FPURegister fd, FPURegister fs);
   void ceil_w_d(FPURegister fd, FPURegister fs);
+  void rint_s(FPURegister fd, FPURegister fs);
+  void rint_d(FPURegister fd, FPURegister fs);
+  void rint(SecondaryField fmt, FPURegister fd, FPURegister fs);
 
   void cvt_l_s(FPURegister fd, FPURegister fs);
   void cvt_l_d(FPURegister fd, FPURegister fs);