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Re: bit-extract seems broken.

From: Dirk Herrmann
Subject: Re: bit-extract seems broken.
Date: Fri, 22 Dec 2000 14:55:34 +0100 (MET)

On 19 Dec 2000, Jim Blandy wrote:

> Dirk Herrmann <address@hidden> writes:
> > On 19 Dec 2000, Jim Blandy wrote:
> > > Negative values for the @var{start} and @var{end} arguments to
> > > bit-extract aren't meaningful, as they index bits the value doesn't
> > > have.  A negative start or end should be an error.
> > 
> > Right, but what about extracting bits from a negative number?
> Oh.  It should behave as if it were infinitely 1-extended.

This brings me to another question:  It seems that in a lot of places it
is assumed that the machine uses the two's complement representation for
fixnums.  I assume that this is the standard case, or should we try to
cover other representations as well?

Best regards,
Dirk Herrmann

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