MIPS: Add float instructions and test coverage, part one

src/mips64/simulator-mips64.h

Index: src/mips64/simulator-mips64.h
diff --git a/src/mips64/simulator-mips64.h b/src/mips64/simulator-mips64.h
index fba2b220e1cf7f2531636f4921646428a2242c10..1a98133165d2b0dea4d9a1a65ed8d657e4907a4b 100644
--- a/src/mips64/simulator-mips64.h
+++ b/src/mips64/simulator-mips64.h
@@ -207,11 +207,14 @@ class Simulator {
   bool test_fcsr_bit(uint32_t cc);
   bool set_fcsr_round_error(double original, double rounded);
   bool set_fcsr_round64_error(double original, double rounded);
+  bool set_fcsr_round_error(float original, float rounded);
+  bool set_fcsr_round64_error(float original, float rounded);
   void round_according_to_fcsr(double toRound, double& rounded,
                                int32_t& rounded_int, double fs);
   void round64_according_to_fcsr(double toRound, double& rounded,
                                  int64_t& rounded_int, double fs);
-
+  void set_fcsr_rounding_mode(FPURoundingMode mode);
+  unsigned int get_fcsr_rounding_mode();
   // Special case of set_register and get_register to access the raw PC value.
   void set_pc(int64_t value);
   int64_t get_pc() const;