1// Copyright 2009 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
28function testBitNot(x, name) {
29  // The VM constant folds so we use that to check the result.
30  var expected = eval("~(" + x + ")");
31  var actual = ~x;
32  assertEquals(expected, actual, "x: " + name);
33
34  // Test the path where we can overwrite the result. Use -
35  // to avoid concatenating strings.
36  expected = eval("~(" + x + " - 0.01)");
37  actual = ~(x - 0.01);
38  assertEquals(expected, actual, "x - 0.01: " + name);
39}
40
41
42testBitNot(0, 0);
43testBitNot(1, 1);
44testBitNot(-1, 1);
45testBitNot(100, 100);
46testBitNot(0x40000000, "0x40000000");
47testBitNot(0x7fffffff, "0x7fffffff");
48testBitNot(0x80000000, "0x80000000");
49
50testBitNot(2.2, 2.2);
51testBitNot(-2.3, -2.3);
52testBitNot(Infinity, "Infinity");
53testBitNot(NaN, "NaN");
54testBitNot(-Infinity, "-Infinity");
55testBitNot(0x40000000 + 0.12345, "float1");
56testBitNot(0x40000000 - 0.12345, "float2");
57testBitNot(0x7fffffff + 0.12345, "float3");
58testBitNot(0x7fffffff - 0.12345, "float4");
59testBitNot(0x80000000 + 0.12345, "float5");
60testBitNot(0x80000000 - 0.12345, "float6");
61
62testBitNot("0", "string0");
63testBitNot("2.3", "string2.3");
64testBitNot("-9.4", "string-9.4");
65
66
67// Try to test that we can deal with allocation failures in
68// the fast path and just use the slow path instead.
69function TryToGC() {
70  var x = 0x40000000;
71  // Put in an eval to foil Crankshaft.
72  eval("");
73  for (var i = 0; i < 1000000; i++) {
74    assertEquals(~0x40000000, ~x);
75  }
76}
77TryToGC();
78