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60d1aac8d2
PR-URL: https://github.com/nodejs/node/pull/12784 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
32 lines
969 B
JavaScript
32 lines
969 B
JavaScript
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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var stdlib = {};
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var foreign = {};
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var heap = new ArrayBuffer(64 * 1024);
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function Word32And(rhs) {
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var name = "and_0x" + Number(rhs).toString(16);
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var m = eval(
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'function Module(stdlib, foreign, heap) {\n' +
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' "use asm";\n' +
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' function ' + name + '(lhs) {\n' +
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' lhs = lhs | 0;\n' +
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' return (lhs & 0x' + Number(rhs).toString(16) + ') | 0;\n' +
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' }\n' +
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' return { f: ' + name + '}\n' +
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'}; Module');
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return m(stdlib, foreign, heap).f;
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}
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var masks = [0xffffffff, 0xf0f0f0f0, 0x80ffffff, 0x07f77f0f, 0xdeadbeef,
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0x0fffff00, 0x0ff0, 0xff, 0x00];
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for (var i in masks) {
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var rhs = masks[i];
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var and = Word32And(rhs);
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for (var lhs = -2147483648; lhs < 2147483648; lhs += 3999773) {
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assertEquals(lhs & rhs, and(lhs));
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}
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}
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