Mail Archives: cygwin/2005/02/23/12:32:03
----Original Message----
>From: cygwin-owner On Behalf Of Ralf B. Schulz
>Sent: 23 February 2005 16:42
> Long doubles are 12 byte = 96 bit = sizeof(long double). No matter whether
> stored in memory or in registers, they should have that length, no?
Oh, that does turn out to be a recent change to gcc. Hmm.
Then again, I can't reproduce the problem here. Maybe that's the AMD vs
Intel difference you were wondering about. I've got a P4; same OS version
as you though, XpSp1. It makes no difference if I have the call to
gethostname or not, and it makes no difference if I compile with or without
optimisation.
> In the original code, tolerance is set to 1e-19 instead of 5e-16 if long
> doubles are available. In this case, the code calling gethostname() goes
> into an infinite loop.
That code is seriously buggy, isn't it?
const long double tolerance = 5e-16;
long double p1, p2, p3;
do
{
[details omitted]
}
while (abs(p1/pp) > tolerance);
^^^^^^^^^^^^^^^^^^^^^^
<koff> I really think that ought to have been *f*abs, should it not?
Heh. Why do people always think they can just ignore compiler warnings?
cheers,
DaveK
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