Remove DoubleRepresentation from globals.h

src/mips64/macro-assembler-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.
 
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
@@ skipping 2491 matching lines @@
 }
 
 
 void MacroAssembler::Move(FPURegister dst, float imm) {
   li(at, Operand(bit_cast<int32_t>(imm)));
   mtc1(at, dst);
 }
 
 
 void MacroAssembler::Move(FPURegister dst, double imm) {
-  static const DoubleRepresentation minus_zero(-0.0);
-  static const DoubleRepresentation zero(0.0);
-  DoubleRepresentation value_rep(imm);
+  int64_t imm_bits = bit_cast<int64_t>(imm);
   // Handle special values first.
-  if (value_rep == zero && has_double_zero_reg_set_) {
+  if (imm_bits == bit_cast<int64_t>(0.0) && has_double_zero_reg_set_) {
     mov_d(dst, kDoubleRegZero);
-  } else if (value_rep == minus_zero && has_double_zero_reg_set_) {
+  } else if (imm_bits == bit_cast<int64_t>(-0.0) && has_double_zero_reg_set_) {
     neg_d(dst, kDoubleRegZero);
   } else {
     uint32_t lo, hi;
     DoubleAsTwoUInt32(imm, &lo, &hi);
     // Move the low part of the double into the lower bits of the corresponding
     // FPU register.
     if (lo != 0) {
       if (!(lo & kImm16Mask)) {
         lui(at, (lo >> kLuiShift) & kImm16Mask);
         mtc1(at, dst);
@@ skipping 4718 matching lines @@
   if (mag.shift > 0) sra(result, result, mag.shift);
   srl(at, dividend, 31);
   Addu(result, result, Operand(at));
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64