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; 71 for (var i = 0; i < 1000000; i++) { 72 assertEquals(~0x40000000, ~x); 73 } 74 } 75 TryToGC(); 76
