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diff --git a/toolkit/xre/test/test_fpuhandler.html b/toolkit/xre/test/test_fpuhandler.html
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+<head>
+ <title>Floating-point exception handler test</title>
+ <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+
+<body onload="runTest()">
+ <embed id="plugin1" type="application/x-test" width="400" height="400"></embed>
+
+ <script class="testbody" type="application/javascript">
+ SimpleTest.waitForExplicitFinish();
+
+ function doDiv(x, y) {
+ var z;
+ z = x / y;
+
+ for (i = 0 + x; i < 1000; ++i)
+ z = y / x;
+
+ z = x / y;
+ return z;
+ }
+
+ function runTest()
+ {
+ ok(isNaN(doDiv(0.0, 0.0)), "Undefined division-by-zero doesn't crash");
+
+ try {
+ document.getElementById('plugin1').enableFPExceptions();
+ }
+ catch (e) {
+ ok(true, "No special code to set the FPU bit in the testplugin.");
+ SimpleTest.finish();
+ return;
+ }
+
+ ok(isNaN(doDiv(0.0, 0.0)), "Undefined division-by-zero doesn't crash again.");
+ SimpleTest.finish();
+ }
+ </script>