eaa92feb9a
This allows us to remove the troublesome %_MathClz32 intrinsic and also allows us to utilize the functionality that is already available in TurboFan. Also introduce a proper NumberClz32 operator so we don't need to introduce a machine operator at the JS level. R=epertoso@chromium.org Review URL: https://codereview.chromium.org/1852553003 Cr-Commit-Position: refs/heads/master@{#35208}
29 lines
615 B
JavaScript
29 lines
615 B
JavaScript
// Copyright 2015 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 = { Math: Math };
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var f = (function Module(stdlib) {
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"use asm";
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var clz32 = stdlib.Math.clz32;
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function f(a) {
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a = a >>> 0;
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return clz32(a)|0;
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}
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return f;
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})(stdlib);
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assertEquals(32, f(0));
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assertEquals(32, f(NaN));
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assertEquals(32, f(undefined));
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for (var i = 0; i < 32; ++i) {
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assertEquals(i, f((-1) >>> i));
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}
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for (var i = -2147483648; i < 2147483648; i += 3999773) {
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assertEquals(Math.clz32(i), f(i));
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}
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