22 May
2016
22 May
'16
10:18 a.m.
On 05/22/2016 06:23 AM, Toby Thain wrote:
I didn't mean performance - I meant programmer
effort to ensure
robust/correct code. The Grishman book didn't reassure me, but thanks
for the additional info.
Well, if you consider it carefully, does zero really have a sign? So,
the convention of considering 0 to be a positive value is, in a sense,
illogical. But no, I don't recall that the issue of -0 ever raised much
of a problem in either CP or PP code.
I've long wondered if the abandonment of ones' complement arithmetic on
modern ISAs was more due to the requirement that ones; comp requires an
end-around carry, where two's comp does not.
--Chuck