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NNTP-Posting-Date: Wed, 20 Jul 2011 03:22:15 -0500
Date: Wed, 20 Jul 2011 09:22:15 +0100
From: bugbear <bugbear@trim_papermule.co.uk_trim>
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Subject: Re: Arithmetic overflow checking
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:6300 comp.lang.c:8526

tm wrote:

>
> And popular CPUs, which do detect integer overflow, do not
> trigger an interupt. This makes zero overhead overflow
> detection impossible.
>
> So software suffers because hardware / CPU designers want
> to save a transistor...

Some software relies on overflows NOT triggering
anything - encryption software, for example.

I think an interrupt every time THAT overflows
would have performance implications ;-)

  BugBear