v8/test/mjsunit/negate-zero.js
lrn@chromium.org 0c6fbad874 Add more tests to mul-exhaustive for constant left/right operands.
Make MJSUnit able to distinguish 0 and -0.

Review URL: http://codereview.chromium.org/6688062

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7368 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2011-03-25 13:24:20 +00:00

43 lines
1.9 KiB
JavaScript

// Copyright 2008 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
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//
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function IsNegativeZero(x) {
assertTrue(x == 0); // Is 0 or -0.
var y = 1 / x;
assertFalse(isFinite(y));
return y < 0;
}
var pz = 0;
var nz = -0;
assertTrue(IsNegativeZero(nz), "-0");
assertFalse(IsNegativeZero(-nz), "-(-0)");
assertFalse(IsNegativeZero(pz), "0");
assertTrue(IsNegativeZero(-pz), "-(0)");