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 var stdlib = {}; 6 var foreign = {}; 7 var heap = new ArrayBuffer(64 * 1024); 8 9 function Word32And(rhs) { 10 var name = "and_0x" + Number(rhs).toString(16); 11 var m = eval("function Module(stdlib, foreign, heap) {\n" 12 + " \"use asm\";\n" 13 + " function " + name + "(lhs) {\n" 14 + " return (lhs | 0) & 0x" + Number(rhs).toString(16) + ";\n" 15 + " }\n" 16 + " return { f: " + name + "}\n" 17 + "}; Module"); 18 return m(stdlib, foreign, heap).f; 19 } 20 21 var masks = [0xffffffff, 0xf0f0f0f0, 0x80ffffff, 0x07f77f0f, 0xdeadbeef, 22 0x0fffff00, 0x0ff0, 0xff, 0x00]; 23 for (var i in masks) { 24 var rhs = masks[i]; 25 var and = Word32And(rhs); 26 for (var lhs = -2147483648; lhs < 2147483648; lhs += 3999773) { 27 assertEquals(lhs & rhs, and(lhs)); 28 } 29 } 30
