[wasm] mips: Turn off signalling NaN tests on mips and mips64.

src/mips/simulator-mips.cc

Index: src/mips/simulator-mips.cc
diff --git a/src/mips/simulator-mips.cc b/src/mips/simulator-mips.cc
index 0c91cb5512c94bce4adf210768a676cac5cc275b..e37b6e12f9309a296556327074a303339d62a649 100644
--- a/src/mips/simulator-mips.cc
+++ b/src/mips/simulator-mips.cc
@@ -4483,7 +4483,7 @@ void Simulator::CallInternal(byte* entry) {
 
   // Set up the callee-saved registers with a known value. To be able to check
   // that they are preserved properly across JS execution.
-  int32_t callee_saved_value = icount_;
+  int32_t callee_saved_value = static_cast<int32_t>(icount_);
   set_register(s0, callee_saved_value);
   set_register(s1, callee_saved_value);
   set_register(s2, callee_saved_value);