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Date: Mon, 9 Apr 2018 17:33:01 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Floating point exception in strtod()
Message-ID: <20180409153301.GH29703@calimero.vinschen.de>
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On Apr  9 14:45, Soegtrop, Michael wrote:
> Dear Corinna,
>=20
> > L is of type Long =3D=3D int32_t, aadj is of type double.  The value of
> > aadj at this time is 2529648000.0 =3D=3D 0x96c75d80 which appears to be
> > perfectly valid for a 32 bit int.
>=20
> 2529648000 is a valid unsigned long, but not a valid signed long. The
> largest 32 bit long is 2^31-1 =3D 2147483647. 0x96c75d80 interpreted as
> a signed long is a negative number.
>=20
> I would say if floating point instructions are used to convert
> 2529648000 to a signed 32 bit integer, they should produce an
> FE_INVALID exception.

...which is what I described in the rest of my mail :)


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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