Date: Sun, 09 Apr 2000 23:07:14 +0900 From: "Daniel C. Sobral" <dcs@newsguy.com> To: Randall Hopper <aa8vb@ipass.net> Cc: stable@FreeBSD.ORG Subject: Re: float-to-double core dump on 3.4R Message-ID: <38F08E92.8E1016C4@newsguy.com> References: <20000408193053.A3689@ipass.net>
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Randall Hopper wrote:
>
> #include <float.h>
>
> main()
> {
> float f = FLT_MAX;
> double d;
> f = f * 2;
> d = f;
> }
>
> Delete the "d=f" line and it doesn't core. Put it in and it does
> (floating-point exception).
>
> >From this it appears there may be a bug in the float-to-double promotion
> when f is Inf (or, at least I'd expect that f is Inf).
>
> Any comments? If not, I'll file the PR.
Sure. If you delete the last line, the compiler will optimize away f = f
* 2, I bet. Try with -O0 (that's oh-zero :).
--
Daniel C. Sobral (8-DCS)
dcs@newsguy.com
dcs@freebsd.org
capo@zurichgnomes.bsdconspiracy.net
The size of the pizza is inversely proportional to the intensity of the
hunger.
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