Reland "MIPS: Add float instructions and test coverage, part one"

src/mips/simulator-mips.h

Index: src/mips/simulator-mips.h
diff --git a/src/mips/simulator-mips.h b/src/mips/simulator-mips.h
index a135f8d71dd2b49c3b4a9a9cb76f4436b90eb3ac..a66ef6b354c47305a5a04de764dda2724db2f368 100644
--- a/src/mips/simulator-mips.h
+++ b/src/mips/simulator-mips.h
@@ -178,6 +178,9 @@ class Simulator {
   void set_fcsr_rounding_mode(FPURoundingMode mode);
   unsigned int get_fcsr_rounding_mode();
   bool set_fcsr_round_error(double original, double rounded);
+  bool set_fcsr_round_error(float original, float rounded);
+  bool set_fcsr_round64_error(double original, double 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);
   // Special case of set_register and get_register to access the raw PC value.