30 lines
935 B
JavaScript
30 lines
935 B
JavaScript
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// 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("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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+ " return (lhs | 0) & 0x" + Number(rhs).toString(16) + ";\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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