Convert ElementsKind into a BitField

src/arm/macro-assembler-arm.cc

 // 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.
 
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #include "v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
@@ skipping 3928 matching lines @@
   Register current = scratch0;
   Label loop_again;
 
   // scratch contained elements pointer.
   mov(current, object);
 
   // Loop based on the map going up the prototype chain.
   bind(&loop_again);
   ldr(current, FieldMemOperand(current, HeapObject::kMapOffset));
   ldr(scratch1, FieldMemOperand(current, Map::kBitField2Offset));
-  Ubfx(scratch1, scratch1, Map::kElementsKindShift, Map::kElementsKindBitCount);
+  DecodeField<Map::ElementsKindBits>(scratch1);
   cmp(scratch1, Operand(DICTIONARY_ELEMENTS));
   b(eq, found);
   ldr(current, FieldMemOperand(current, Map::kPrototypeOffset));
   cmp(current, Operand(factory->null_value()));
   b(ne, &loop_again);
 }
 
 
 #ifdef DEBUG
 bool AreAliased(Register reg1,
@@ skipping 78 matching lines @@
     sub(result, result, Operand(dividend));
   }
   if (ms.shift() > 0) mov(result, Operand(result, ASR, ms.shift()));
   add(result, result, Operand(dividend, LSR, 31));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM