Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 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 | |
| 28 | function 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 | |
| 42 | testBitNot(0, 0); |
| 43 | testBitNot(1, 1); |
| 44 | testBitNot(-1, 1); |
| 45 | testBitNot(100, 100); |
| 46 | testBitNot(0x40000000, "0x40000000"); |
| 47 | testBitNot(0x7fffffff, "0x7fffffff"); |
| 48 | testBitNot(0x80000000, "0x80000000"); |
| 49 | |
| 50 | testBitNot(2.2, 2.2); |
| 51 | testBitNot(-2.3, -2.3); |
| 52 | testBitNot(Infinity, "Infinity"); |
| 53 | testBitNot(NaN, "NaN"); |
| 54 | testBitNot(-Infinity, "-Infinity"); |
| 55 | testBitNot(0x40000000 + 0.12345, "float1"); |
| 56 | testBitNot(0x40000000 - 0.12345, "float2"); |
| 57 | testBitNot(0x7fffffff + 0.12345, "float3"); |
| 58 | testBitNot(0x7fffffff - 0.12345, "float4"); |
| 59 | testBitNot(0x80000000 + 0.12345, "float5"); |
| 60 | testBitNot(0x80000000 - 0.12345, "float6"); |
| 61 | |
| 62 | testBitNot("0", "string0"); |
| 63 | testBitNot("2.3", "string2.3"); |
| 64 | testBitNot("-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. |
| 69 | function TryToGC() { |
| 70 | var x = 0x40000000; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 71 | // Put in an eval to foil Crankshaft. |
| 72 | eval(""); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 73 | for (var i = 0; i < 1000000; i++) { |
| 74 | assertEquals(~0x40000000, ~x); |
| 75 | } |
| 76 | } |
| 77 | TryToGC(); |