1 // Copyright 2014 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Flags: --allow-natives-syntax 6 7 function assertDoubleBits(hi, lo, x) { 8 hi = hi | 0; 9 lo = lo | 0; 10 assertEquals(x, %_ConstructDouble(hi, lo)); 11 assertEquals(hi, %_DoubleHi(x)); 12 assertEquals(lo, %_DoubleLo(x)); 13 assertEquals(x, %_ConstructDouble(%_DoubleHi(x), %_DoubleLo(x))); 14 } 15 16 17 var tests = [0x7ff00000, 0x00000000, Infinity, 18 0xfff00000, 0x00000000, -Infinity, 19 0x80000000, 0x00000000, -0, 20 0x400921fb, 0x54442d18, Math.PI, 21 0xc00921fb, 0x54442d18, -Math.PI, 22 0x4005bf0a, 0x8b145769, Math.E, 23 0xc005bf0a, 0x8b145769, -Math.E, 24 0xbfe80000, 0x00000000, -0.75]; 25 26 27 for (var i = 0; i < tests.length; i += 3) { 28 assertDoubleBits(tests[i], tests[i + 1], tests[i + 2]); 29 } 30 31 %OptimizeFunctionOnNextCall(assertDoubleBits); 32 33 for (var i = 0; i < tests.length; i += 3) { 34 assertDoubleBits(tests[i], tests[i + 1], tests[i + 2]); 35 assertOptimized(assertDoubleBits); 36 } 37
