1// Copyright 2013 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
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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,
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26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --allow-natives-syntax
29
30
31// Test that both kinds of NaNs (signaling or quiet) do not signal
32
33function TestAllModes(f) {
34  f(); // Runtime
35  f(); // IC
36  f(); // IC second time
37  %OptimizeFunctionOnNextCall(f);
38  f(); // hydrogen
39}
40
41function TestDoubleSignalingNan() {
42  // NaN with signal bit set
43  function f() {
44    var bytes = new Uint32Array([1, 0x7FF00000]);
45    var doubles = new Float64Array(bytes.buffer);
46    assertTrue(isNaN(doubles[0]));
47    assertTrue(isNaN(doubles[0]*2.0));
48    assertTrue(isNaN(doubles[0] + 0.5));
49  }
50
51  TestAllModes(f);
52}
53
54TestDoubleSignalingNan();
55
56function TestDoubleQuietNan() {
57  // NaN with signal bit cleared
58  function f() {
59    var bytes = new Uint32Array([0, 0x7FF80000]);
60    var doubles = new Float64Array(bytes.buffer);
61    assertTrue(isNaN(doubles[0]));
62    assertTrue(isNaN(doubles[0]*2.0));
63    assertTrue(isNaN(doubles[0] + 0.5));
64  }
65
66  TestAllModes(f);
67}
68
69TestDoubleQuietNan();
70
71function TestFloatSignalingNan() {
72  // NaN with signal bit set
73  function f() {
74    var bytes = new Uint32Array([0x7F800001]);
75    var floats = new Float32Array(bytes.buffer);
76    assertTrue(isNaN(floats[0]));
77    assertTrue(isNaN(floats[0]*2.0));
78    assertTrue(isNaN(floats[0] + 0.5));
79  }
80
81  TestAllModes(f);
82}
83
84TestFloatSignalingNan();
85
86function TestFloatQuietNan() {
87  // NaN with signal bit cleared
88  function f() {
89    var bytes = new Uint32Array([0x7FC00000]);
90    var floats = new Float32Array(bytes.buffer);
91    assertTrue(isNaN(floats[0]));
92    assertTrue(isNaN(floats[0]*2.0));
93    assertTrue(isNaN(floats[0] + 0.5));
94  }
95
96  TestAllModes(f);
97}
98
99TestFloatQuietNan();
100
101
102
103
104