diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug663338.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug663338.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,26 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+
+assertEq(parseInt(1.0e-7, 10), 1);
+assertEq(parseInt(-1.0e-7, 10), -1);
+
+assertEq(parseInt(9e-8, 10), 9);
+assertEq(parseInt(-9e-8, 10), -9);
+
+assertEq(parseInt(1.5e-8, 10), 1);
+assertEq(parseInt(-1.5e-8, 10), -1);
+
+assertEq(parseInt(1.0e-6, 10), 0);
+
+assertEq(parseInt(0, 10), 0);
+assertEq(parseInt(-0, 10), 0);
+
+assertEq(parseInt('0', 10), 0);
+assertEq(parseInt('-0', 10), -0);
+
+/* this is not very hacky, but we try to get a double value of 0, instead of int */
+assertEq(parseInt(Math.asin(0), 10), 0); 
+assertEq(parseInt(Math.asin(-0), 10), 0);