[issue1205239] Let shift operators take any integer value

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

Interesting.  I agree that that looks like a case where it would be desirable for a >> -n to do a << n.

By the way, I don't think your formula is quite correct:  your crc is going to grow unboundedly as extra data bytes come in.  I suspect that you want to mask the result with (1 << crc_width) - 1 after each update.
(And what's the '& 0xFF' for?  Isn't it redundant?)

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