17 lines
532 B
JavaScript
17 lines
532 B
JavaScript
// 20.2.2.18 Math.imul(x, y)
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var $export = require('./_export')
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, $imul = Math.imul;
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// some WebKit versions fails with big numbers, some has wrong arity
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$export($export.S + $export.F * require('./_fails')(function(){
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return $imul(0xffffffff, 5) != -5 || $imul.length != 2;
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}), 'Math', {
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imul: function imul(x, y){
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var UINT16 = 0xffff
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, xn = +x
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, yn = +y
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, xl = UINT16 & xn
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, yl = UINT16 & yn;
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return 0 | xl * yl + ((UINT16 & xn >>> 16) * yl + xl * (UINT16 & yn >>> 16) << 16 >>> 0);
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}
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}); |