MIPS: Fix '[turbofan] Introduce new operators Float32SubPreserveNan and Float64SubPreserveNan'.

src/mips64/constants-mips64.h

Index: src/mips64/constants-mips64.h
diff --git a/src/mips64/constants-mips64.h b/src/mips64/constants-mips64.h
index 82724201d9fea0f4370dcb8cce8d58abe7b5a221..60754210b84c8deb8caad9625eff7df38572a95d 100644
--- a/src/mips64/constants-mips64.h
+++ b/src/mips64/constants-mips64.h
@@ -159,6 +159,22 @@ const int32_t kPrefHintStoreRetained = 7;
 const int32_t kPrefHintWritebackInvalidate = 25;
 const int32_t kPrefHintPrepareForStore = 30;
 
+class FloatConstants {
+ public:
+  static const uint64_t kExponentMask = 0x7f800000;
+  static const uint64_t kMantissaMask = 0x007fffff;
+  static const uint64_t kNanTypeMask = 0x00400000;
+  static const uint64_t kSignMask = 0x80000000;
+};
+
+class DoubleConstants {
+ public:
+  static const uint64_t kExponentMask = 0x7ff0000000000000;
+  static const uint64_t kMantissaMask = 0x000fffffffffffff;
+  static const uint64_t kNanTypeMask = 0x0008000000000000;
+  static const uint64_t kSignMask = 0x8000000000000000;
+};
+
 // Helper functions for converting between register numbers and names.
 class Registers {
  public: