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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: bignum branch
Date: Tue, 17 Jul 2018 21:24:31 +0300
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> From: Robert Pluim <rpluim@gmail.com>
> Date: Tue, 17 Jul 2018 20:10:39 +0200
> Cc: emacs-devel@gnu.org
> 
> The interpreter is fine. ccl.el assumes that 'ash' will truncate its
> result, which is no longer true when using bignums. Truncating all ash
> operations to 28 bits in ccl.el fixes this particular error for me,
> but the resulting CCL programs are not identical:

Why is it important that the CCL programs be identical?

Or maybe we should have a variant of 'ash' that does truncate, since
other callers might expect the same?