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Dir : ~/usr/share/nodejs/core-js/modules/

View File Name : es.math.imul.js

var $ = require('../internals/export');
var fails = require('../internals/fails');

// eslint-disable-next-line es/no-math-imul -- required for testing
var $imul = Math.imul;

var FORCED = fails(function () {
  return $imul(0xFFFFFFFF, 5) != -5 || $imul.length != 2;
});

// `Math.imul` method
// https://tc39.es/ecma262/#sec-math.imul
// some WebKit versions fails with big numbers, some has wrong arity
$({ target: 'Math', stat: true, forced: FORCED }, {
  imul: function imul(x, y) {
    var UINT16 = 0xFFFF;
    var xn = +x;
    var yn = +y;
    var xl = UINT16 & xn;
    var yl = UINT16 & yn;
    return 0 | xl * yl + ((UINT16 & xn >>> 16) * yl + xl * (UINT16 & yn >>> 16) << 16 >>> 0);
  }
});