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Math.imul() |
Sorry about my previous revision; this one is correct. The >>>0 coerces the upper bits into an unsigned quantity which is added to the lower bits, and the |0 brings the total back into signed territory. | |
Math.imul() |
The given imul polyfill can produce values > 32 bits, since the high part can overflow. For example, try running it with 0xffffffff and 5. The high part needs to be truncated to 32-bits; hence the |0. |