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

src/mips64/constants-mips64.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef  V8_MIPS_CONSTANTS_H_
 #define  V8_MIPS_CONSTANTS_H_
 
 #include "src/base/logging.h"
 #include "src/base/macros.h"
 #include "src/globals.h"
@@ skipping 141 matching lines @@
 // 'pref' instruction hints
 const int32_t kPrefHintLoad = 0;
 const int32_t kPrefHintStore = 1;
 const int32_t kPrefHintLoadStreamed = 4;
 const int32_t kPrefHintStoreStreamed = 5;
 const int32_t kPrefHintLoadRetained = 6;
 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:
   // Return the name of the register.
   static const char* Name(int reg);
 
   // Lookup the register number for the name provided.
   static int Number(const char* name);
 
   struct RegisterAlias {
@@ skipping 1128 matching lines @@
   }
   return kUnsupported;
 }
 
 #undef OpcodeToBitNumber
 #undef FunctionFieldToBitNumber
 }  // namespace internal
 }  // namespace v8
 
 #endif    // #ifndef V8_MIPS_CONSTANTS_H_