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Subject: [Bug 206230] dc(1) bugs
Date: Fri, 01 Dec 2017 21:04:50 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D206230

Alan Somers <asomers@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |asomers@FreeBSD.org

--- Comment #1 from Alan Somers <asomers@FreeBSD.org> ---
The problem is simpler than you suggest.  It looks like fractional input
doesn't work correctly when the input base is 16.  Try this:

$ dc -xe 16i0.1p
0.0
$ dc -xe 16i0.8p
.5
$ dc -xe 16i0.4p
.2

The first and third results are wrong, and the second result is correct.  I=
 get
the same results with both the FreeBSD and the GNU versions of both bc(1) a=
nd
dc(1).  I suspect the problem is that some number is being treated as an
integer in units of base^n for n < 0 _before_ conversion to a bignum.  That
would explain these three results, for n=3D-1.

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