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

src/mips/constants-mips.h

Index: src/mips/constants-mips.h
diff --git a/src/mips/constants-mips.h b/src/mips/constants-mips.h
index f50a84927af4eeab18aa718f4bfa0023faa1a9ee..211ddb6d9f0dc3c45265f80d5196c7f77fef743d 100644
--- a/src/mips/constants-mips.h
+++ b/src/mips/constants-mips.h
@@ -196,6 +196,22 @@ const int32_t kPrefHintStoreRetained = 7;
 const int32_t kPrefHintWritebackInvalidate = 25;
 const int32_t kPrefHintPrepareForStore = 30;
 
+class FloatConstants {
+ public:
+  static const uint32_t kExponentMask = 0x7f800000;
+  static const uint32_t kMantissaMask = 0x007fffff;
+  static const uint32_t kNanTypeMask = 0x00400000;
+  static const uint32_t kSignMask = 0x80000000;
+};
+
+class DoubleConstants {
+ public:
+  static const uint32_t kExponentMask = 0x7ff00000;
+  static const uint32_t kMantissaMask = 0x000fffff;
+  static const uint32_t kNanTypeMask = 0x00080000;
+  static const uint32_t kSignMask = 0x80000000;
+};
+
 // Helper functions for converting between register numbers and names.
 class Registers {
  public: