1// Copyright 2008 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28const SMI_MAX = (1 << 30) - 1;
29const SMI_MIN = -(1 << 30);
30
31function testmulneg(a, b) {
32  var base = a * b;
33  assertEquals(-base, a * -b, "a * -b where a = " + a + ", b = " + b);
34  assertEquals(-base, -a * b, "-a * b where a = " + a + ", b = " + b);
35  assertEquals(base, -a * -b, "*-a * -b where a = " + a + ", b = " + b);
36}
37
38testmulneg(2, 3);
39testmulneg(SMI_MAX, 3);
40testmulneg(SMI_MIN, 3);
41testmulneg(3.2, 2.3);
42
43var x = { valueOf: function() { return 2; } };
44var y = { valueOf: function() { return 3; } };
45
46testmulneg(x, y);
47
48// The test below depends on the correct evaluation order, which is not
49// implemented by any of the known JS engines.
50var z;
51var v = { valueOf: function() { z+=2; return z; } };
52var w = { valueOf: function() { z+=3; return z; } };
53
54z = 0;
55var base = v * w;
56z = 0;
57assertEquals(-base, -v * w);
58z = 0;
59assertEquals(base, -v * -w);
60