Use the BitField class for Code::Flags.

src/mips/ic-mips.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 128 matching lines @@
 
   // If probing finds an entry check that the value is a normal
   // property.
   __ bind(&done);  // scratch2 == elements + 4 * index.
   const int kElementsStartOffset = StringDictionary::kHeaderSize +
       StringDictionary::kElementsStartIndex * kPointerSize;
   const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize;
   __ lw(scratch1, FieldMemOperand(scratch2, kDetailsOffset));
   __ And(at,
          scratch1,
-         Operand(PropertyDetails::TypeField::mask() << kSmiTagSize));
+         Operand(PropertyDetails::TypeField::kMask << kSmiTagSize));
   __ Branch(miss, ne, at, Operand(zero_reg));
 
   // Get the value at the masked, scaled index and return.
   __ lw(result,
         FieldMemOperand(scratch2, kElementsStartOffset + 1 * kPointerSize));
 }
 
 
 // Helper function used from StoreIC::GenerateNormal.
 //
@@ skipping 29 matching lines @@
                                                      name,
                                                      scratch1,
                                                      scratch2);
 
   // If probing finds an entry in the dictionary check that the value
   // is a normal property that is not read only.
   __ bind(&done);  // scratch2 == elements + 4 * index.
   const int kElementsStartOffset = StringDictionary::kHeaderSize +
       StringDictionary::kElementsStartIndex * kPointerSize;
   const int kDetailsOffset = kElementsStartOffset + 2 * kPointerSize;
-  const int kTypeAndReadOnlyMask
-      = (PropertyDetails::TypeField::mask() |
-         PropertyDetails::AttributesField::encode(READ_ONLY)) << kSmiTagSize;
+  const int kTypeAndReadOnlyMask =
+      (PropertyDetails::TypeField::kMask |
+       PropertyDetails::AttributesField::encode(READ_ONLY)) << kSmiTagSize;
   __ lw(scratch1, FieldMemOperand(scratch2, kDetailsOffset));
   __ And(at, scratch1, Operand(kTypeAndReadOnlyMask));
   __ Branch(miss, ne, at, Operand(zero_reg));
 
   // Store the value at the masked, scaled index and return.
   const int kValueOffset = kElementsStartOffset + kPointerSize;
   __ Addu(scratch2, scratch2, Operand(kValueOffset - kHeapObjectTag));
   __ sw(value, MemOperand(scratch2));
 
   // Update the write barrier. Make sure not to clobber the value.
@@ skipping 1419 matching lines @@
     Register reg = Register::from_code(Assembler::GetRs(instr_at_patch));
     patcher.masm()->andi(at, reg, kSmiTagMask);
     patcher.ChangeBranchCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS