shim.js•499 B
/* eslint no-bitwise: "off" */
// Thanks: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference
// /Global_Objects/Math/imul
"use strict";
module.exports = function (val1, val2) {
var xh = (val1 >>> 16) & 0xffff
, xl = val1 & 0xffff
, yh = (val2 >>> 16) & 0xffff
, yl = val2 & 0xffff;
// The shift by 0 fixes the sign on the high part
// the final |0 converts the unsigned value into a signed value
return (xl * yl + (((xh * yl + xl * yh) << 16) >>> 0)) | 0;
};