es.math.imul.js•716 B
'use strict';
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);
}
});