ARM64: Use default-NaN mode to canonicalize NaNs.

src/arm64/lithium-codegen-arm64.cc

Index: src/arm64/lithium-codegen-arm64.cc
diff --git a/src/arm64/lithium-codegen-arm64.cc b/src/arm64/lithium-codegen-arm64.cc
index 1e4754affc2d6e986c4b2845061618ff7ec6d017..fb317bb12285153d14281d8f87023ae9ddd5a6dc 100644
--- a/src/arm64/lithium-codegen-arm64.cc
+++ b/src/arm64/lithium-codegen-arm64.cc
@@ -5166,11 +5166,8 @@ void LCodeGen::DoStoreKeyedFixedDouble(LStoreKeyedFixedDouble* instr) {
   }
 
   if (instr->NeedsCanonicalization()) {
-    DoubleRegister dbl_scratch = double_scratch();
-    __ Fmov(dbl_scratch,
-            FixedDoubleArray::canonical_not_the_hole_nan_as_double());
-    __ Fmaxnm(dbl_scratch, dbl_scratch, value);
-    __ Str(dbl_scratch, FieldMemOperand(store_base, offset));
+    __ CanonicalizeNaN(double_scratch(), value);
+    __ Str(double_scratch(), FieldMemOperand(store_base, offset));
   } else {
     __ Str(value, FieldMemOperand(store_base, offset));
   }