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From: "Tom Linden" <tom@kednos.com>
Newsgroups: comp.lang.ada,comp.lang.fortran,comp.lang.pl1
Subject: Re: ONES COMPLEMENT
Date: Wed, 19 Jul 2006 05:47:52 -0700
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On Tue, 18 Jul 2006 23:54:39 -0700, glen herrmannsfeldt  
<gah@ugcs.caltech.edu> wrote:

> One solution is to do subtraction as the basic operation,
> such that subtracting two of the same number will generate +0,
> and addition as subtraction of the complement.
> -0 can still result if -0 is used as an operand, though.

or mask the sign bit for a zero compare instruction