JezK
Edit File: math-pow.js
// Copyright 2010 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Flags: --allow-natives-syntax // Tests the special cases specified by ES 15.8.2.13 function test() { // Simple sanity check assertEquals(4, Math.pow(2, 2)); assertEquals(2147483648, Math.pow(2, 31)); assertEquals(0.25, Math.pow(2, -2)); assertEquals(0.0625, Math.pow(2, -4)); assertEquals(1, Math.pow(1, 100)); assertEquals(0, Math.pow(0, 1000)); // Spec tests assertEquals(NaN, Math.pow(2, NaN)); assertEquals(NaN, Math.pow(+0, NaN)); assertEquals(NaN, Math.pow(-0, NaN)); assertEquals(NaN, Math.pow(Infinity, NaN)); assertEquals(NaN, Math.pow(-Infinity, NaN)); assertEquals(1, Math.pow(NaN, +0)); assertEquals(1, Math.pow(NaN, -0)); assertEquals(NaN, Math.pow(NaN, NaN)); assertEquals(NaN, Math.pow(NaN, 2.2)); assertEquals(NaN, Math.pow(NaN, 1)); assertEquals(NaN, Math.pow(NaN, -1)); assertEquals(NaN, Math.pow(NaN, -2.2)); assertEquals(NaN, Math.pow(NaN, Infinity)); assertEquals(NaN, Math.pow(NaN, -Infinity)); assertEquals(Infinity, Math.pow(1.1, Infinity)); assertEquals(Infinity, Math.pow(-1.1, Infinity)); assertEquals(Infinity, Math.pow(2, Infinity)); assertEquals(Infinity, Math.pow(-2, Infinity)); // Because +0 == -0, we need to compare 1/{+,-}0 to {+,-}Infinity assertEquals(+Infinity, 1/Math.pow(1.1, -Infinity)); assertEquals(+Infinity, 1/Math.pow(-1.1, -Infinity)); assertEquals(+Infinity, 1/Math.pow(2, -Infinity)); assertEquals(+Infinity, 1/Math.pow(-2, -Infinity)); assertEquals(NaN, Math.pow(1, Infinity)); assertEquals(NaN, Math.pow(1, -Infinity)); assertEquals(NaN, Math.pow(-1, Infinity)); assertEquals(NaN, Math.pow(-1, -Infinity)); assertEquals(+0, Math.pow(0.1, Infinity)); assertEquals(+0, Math.pow(-0.1, Infinity)); assertEquals(+0, Math.pow(0.999, Infinity)); assertEquals(+0, Math.pow(-0.999, Infinity)); assertEquals(Infinity, Math.pow(0.1, -Infinity)); assertEquals(Infinity, Math.pow(-0.1, -Infinity)); assertEquals(Infinity, Math.pow(0.999, -Infinity)); assertEquals(Infinity, Math.pow(-0.999, -Infinity)); assertEquals(Infinity, Math.pow(Infinity, 0.1)); assertEquals(Infinity, Math.pow(Infinity, 2)); assertEquals(+Infinity, 1/Math.pow(Infinity, -0.1)); assertEquals(+Infinity, 1/Math.pow(Infinity, -2)); assertEquals(-Infinity, Math.pow(-Infinity, 3)); assertEquals(-Infinity, Math.pow(-Infinity, 13)); assertEquals(Infinity, Math.pow(-Infinity, 3.1)); assertEquals(Infinity, Math.pow(-Infinity, 2)); assertEquals(-Infinity, 1/Math.pow(-Infinity, -3)); assertEquals(-Infinity, 1/Math.pow(-Infinity, -13)); assertEquals(+Infinity, 1/Math.pow(-Infinity, -3.1)); assertEquals(+Infinity, 1/Math.pow(-Infinity, -2)); assertEquals(+Infinity, 1/Math.pow(+0, 1.1)); assertEquals(+Infinity, 1/Math.pow(+0, 2)); assertEquals(Infinity, Math.pow(+0, -1.1)); assertEquals(Infinity, Math.pow(+0, -2)); assertEquals(-Infinity, 1/Math.pow(-0, 3)); assertEquals(-Infinity, 1/Math.pow(-0, 13)); assertEquals(+Infinity, 1/Math.pow(-0, 3.1)); assertEquals(+Infinity, 1/Math.pow(-0, 2)); assertEquals(-Infinity, Math.pow(-0, -3)); assertEquals(-Infinity, Math.pow(-0, -13)); assertEquals(Infinity, Math.pow(-0, -3.1)); assertEquals(Infinity, Math.pow(-0, -2)); assertEquals(NaN, Math.pow(-0.00001, 1.1)); assertEquals(NaN, Math.pow(-0.00001, -1.1)); assertEquals(NaN, Math.pow(-1.1, 1.1)); assertEquals(NaN, Math.pow(-1.1, -1.1)); assertEquals(NaN, Math.pow(-2, 1.1)); assertEquals(NaN, Math.pow(-2, -1.1)); assertEquals(NaN, Math.pow(-1000, 1.1)); assertEquals(NaN, Math.pow(-1000, -1.1)); assertEquals(+Infinity, 1/Math.pow(-0, 0.5)); assertEquals(+Infinity, 1/Math.pow(-0, 0.6)); assertEquals(-Infinity, 1/Math.pow(-0, 1)); assertEquals(-Infinity, 1/Math.pow(-0, 10000000001)); assertEquals(+Infinity, Math.pow(-0, -0.5)); assertEquals(+Infinity, Math.pow(-0, -0.6)); assertEquals(-Infinity, Math.pow(-0, -1)); assertEquals(-Infinity, Math.pow(-0, -10000000001)); assertEquals(4, Math.pow(16, 0.5)); assertEquals(NaN, Math.pow(-16, 0.5)); assertEquals(0.25, Math.pow(16, -0.5)); assertEquals(NaN, Math.pow(-16, -0.5)); // Test detecting and converting integer value as double. assertEquals(8, Math.pow(2, Math.sqrt(9))); // Tests from Mozilla 15.8.2.13. assertEquals(2, Math.pow.length); assertEquals(NaN, Math.pow()); assertEquals(1, Math.pow(null, null)); assertEquals(NaN, Math.pow(void 0, void 0)); assertEquals(1, Math.pow(true, false)); assertEquals(0, Math.pow(false, true)); assertEquals(Infinity, Math.pow(-Infinity, Infinity)); assertEquals(0, Math.pow(-Infinity, -Infinity)); assertEquals(1, Math.pow(0, 0)); assertEquals(0, Math.pow(0, Infinity)); assertEquals(NaN, Math.pow(NaN, 0.5)); assertEquals(NaN, Math.pow(NaN, -0.5)); // Tests from Sputnik S8.5_A13_T1. assertTrue( (1*((Math.pow(2,53))-1)*(Math.pow(2,-1074))) === 4.4501477170144023e-308); assertTrue( (1*(Math.pow(2,52))*(Math.pow(2,-1074))) === 2.2250738585072014e-308); assertTrue( (-1*(Math.pow(2,52))*(Math.pow(2,-1074))) === -2.2250738585072014e-308); } test(); test(); %OptimizeFunctionOnNextCall(test); test();