A64: Synchronize with r18581.

src/a64/codegen-a64.cc

Index: src/a64/codegen-a64.cc
diff --git a/src/a64/codegen-a64.cc b/src/a64/codegen-a64.cc
index 368ce211305d040466d9912c71111cad34fa3b95..7ce1bfae09e960f9ff807bda3c46d2ca5f0adbdf 100644
--- a/src/a64/codegen-a64.cc
+++ b/src/a64/codegen-a64.cc
@@ -50,14 +50,14 @@ double fast_exp_simulator(double x) {
 
 
 UnaryMathFunction CreateExpFunction() {
-  if (!FLAG_fast_math) return &exp;
+  if (!FLAG_fast_math) return &std::exp;
 
   // Use the Math.exp implemetation in MathExpGenerator::EmitMathExp() to create
   // an AAPCS64-compliant exp() function. This will be faster than the C
   // library's exp() function, but probably less accurate.
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
-  if (buffer == NULL) return &exp;
+  if (buffer == NULL) return &std::exp;
 
   ExternalReference::InitializeMathExpData();
   MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
@@ -97,7 +97,7 @@ UnaryMathFunction CreateExpFunction() {
 
 
 UnaryMathFunction CreateSqrtFunction() {
-  return &sqrt;
+  return &std::sqrt;
 }