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