| 1 | var $ = require('../internals/export');
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| 2 |
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| 3 | // `Math.imulh` method
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| 4 | // https://gist.github.com/BrendanEich/4294d5c212a6d2254703
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| 5 | $({ target: 'Math', stat: true }, {
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| 6 | imulh: function imulh(u, v) {
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| 7 | var UINT16 = 0xFFFF;
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| 8 | var $u = +u;
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| 9 | var $v = +v;
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| 10 | var u0 = $u & UINT16;
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| 11 | var v0 = $v & UINT16;
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| 12 | var u1 = $u >> 16;
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| 13 | var v1 = $v >> 16;
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| 14 | var t = (u1 * v0 >>> 0) + (u0 * v0 >>> 16);
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| 15 | return u1 * v1 + (t >> 16) + ((u0 * v1 >>> 0) + (t & UINT16) >> 16);
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| 16 | }
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| 17 | });
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