MIPS64: Add big-endian support for mips64.

src/ic/mips64/ic-mips64.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.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/codegen.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-compiler.h"
 #include "src/ic/stub-cache.h"
@@ skipping 533 matching lines @@
     // Check for fast double array case. If this fails, call through to the
     // runtime.
     __ LoadRoot(at, Heap::kFixedDoubleArrayMapRootIndex);
     __ Branch(slow, ne, elements_map, Operand(at));
   }
 
   // HOLECHECK: guards "A[i] double hole?"
   // We have to see if the double version of the hole is present. If so
   // go to the runtime.
   __ Daddu(address, elements,
-           Operand(FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32) -
+           Operand(FixedDoubleArray::kHeaderSize + Register::kExponentOffset -
                    kHeapObjectTag));
   __ SmiScale(at, key, kPointerSizeLog2);
   __ daddu(address, address, at);
   __ lw(scratch_value, MemOperand(address));
   __ Branch(&fast_double_without_map_check, ne, scratch_value,
             Operand(static_cast<int32_t>(kHoleNanUpper32)));
   __ JumpIfDictionaryInPrototypeChain(receiver, elements_map, scratch_value,
                                       slow);
 
   __ bind(&fast_double_without_map_check);
@@ skipping 338 matching lines @@
     patcher.ChangeBranchCondition(ne);
   } else {
     DCHECK(Assembler::IsBne(branch_instr));
     patcher.ChangeBranchCondition(eq);
   }
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64