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sourceRevisionAtLastExport: 33f2fb0e53d135f0ee17cfccd9d993eb2a6f47de targetRevisionAtLastExport: 31340cbd9add103f586d501b0c3354b7b182abc0
60 lines
2.4 KiB
JavaScript
60 lines
2.4 KiB
JavaScript
// Copyright 2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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const SMI_MAX = (1 << 30) - 1;
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const SMI_MIN = -(1 << 30);
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function testmulneg(a, b) {
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var base = a * b;
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assertEquals(-base, a * -b, "a * -b where a = " + a + ", b = " + b);
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assertEquals(-base, -a * b, "-a * b where a = " + a + ", b = " + b);
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assertEquals(base, -a * -b, "*-a * -b where a = " + a + ", b = " + b);
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}
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testmulneg(2, 3);
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testmulneg(SMI_MAX, 3);
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testmulneg(SMI_MIN, 3);
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testmulneg(3.2, 2.3);
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var x = { valueOf: function() { return 2; } };
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var y = { valueOf: function() { return 3; } };
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testmulneg(x, y);
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// The test below depends on the correct evaluation order, which is not
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// implemented by any of the known JS engines.
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var z;
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var v = { valueOf: function() { z+=2; return z; } };
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var w = { valueOf: function() { z+=3; return z; } };
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z = 0;
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var base = v * w;
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z = 0;
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assertEquals(-base, -v * w);
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z = 0;
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assertEquals(base, -v * -w);
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