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16 lines
444 B
16 lines
444 B
// https://gist.github.com/BrendanEich/4294d5c212a6d2254703 |
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var $export = require('./_export'); |
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$export($export.S, 'Math', { |
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imulh: function imulh(u, v) { |
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var UINT16 = 0xffff; |
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var $u = +u; |
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var $v = +v; |
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var u0 = $u & UINT16; |
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var v0 = $v & UINT16; |
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var u1 = $u >> 16; |
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var v1 = $v >> 16; |
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var t = (u1 * v0 >>> 0) + (u0 * v0 >>> 16); |
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return u1 * v1 + (t >> 16) + ((u0 * v1 >>> 0) + (t & UINT16) >> 16); |
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} |
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});
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