Properly export uin32_bias double constant.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index c6228eb353eaad7da8a18f10f8c5a84c07215f3e..63294f9fd133ac14c119cb77ac1d7bc6b900b369 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -98,6 +98,7 @@ struct DoubleConstant BASE_EMBEDDED {
   double negative_infinity;
   double canonical_non_hole_nan;
   double the_hole_nan;
+  double uint32_bias;
 };
 
 static DoubleConstant double_constants;
@@ -908,6 +909,8 @@ void ExternalReference::SetUp() {
   double_constants.canonical_non_hole_nan = OS::nan_value();
   double_constants.the_hole_nan = BitCast<double>(kHoleNanInt64);
   double_constants.negative_infinity = -V8_INFINITY;
+  double_constants.uint32_bias =
+    static_cast<double>(static_cast<uint32_t>(0xFFFFFFFF)) + 1;
 
   math_exp_data_mutex = new Mutex();
 }
@@ -1333,6 +1336,12 @@ ExternalReference ExternalReference::address_of_the_hole_nan() {
 }
 
 
+ExternalReference ExternalReference::address_of_uint32_bias() {
+  return ExternalReference(
+      reinterpret_cast<void*>(&double_constants.uint32_bias));
+}
+
+
 #ifndef V8_INTERPRETED_REGEXP
 
 ExternalReference ExternalReference::re_check_stack_guard_state(