MIPS: Fix r19175 "Avoid embedding x86 NaN constant in MacroAssembler code when snapshot is created."

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index 69a2a3dc4b0bca87637e078cf7578a1e692e14bd..1667ee4ddc6b739f8e1cdfc7e8ad88fcb8e43985 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -3440,8 +3440,8 @@ void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
   bind(&is_nan);
   // Load canonical NaN for storing into the double array.
   LoadRoot(at, Heap::kNanValueRootIndex);
-  lw(mantissa_reg, FieldMemOperand(at, HeapNumber::kValueOffset));
-  lw(exponent_reg, FieldMemOperand(at, HeapNumber::kValueOffset + 4));
+  lw(mantissa_reg, FieldMemOperand(at, HeapNumber::kMantissaOffset));
+  lw(exponent_reg, FieldMemOperand(at, HeapNumber::kExponentOffset));
   jmp(&have_double_value);
 
   bind(&smi_value);