0c6fbad874
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
43 lines
1.9 KiB
JavaScript
43 lines
1.9 KiB
JavaScript
// Copyright 2008 the V8 project authors. All rights reserved.
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following
|
|
// disclaimer in the documentation and/or other materials provided
|
|
// with the distribution.
|
|
// * Neither the name of Google Inc. nor the names of its
|
|
// contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
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)");
|