DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:reply-to
	:references:mime-version:content-type:in-reply-to; q=dns; s=
	default; b=fIA77sVqNB7nqlxtDeBGqbdQqMJC6uLlVnvmOkXWXGj+mSlhLchY1
	y5X3T5KZQAtukRch9ZN7n0UtY6tRtsin/E6FmXOjk8bPNP9iRdvGe6fhD/IpcMcP
	qks9sO4JZoHWV3M+HUSArRo1ZaT2A7dJ/MkQ1UhahqxNjovg8DVJvs=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Date: Wed, 1 Aug 2018 13:00:09 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: x86_64: floating-point environment (i.e. fenv.h). BUG.
Message-ID: <20180801110009.GA30124@calimero.vinschen.de>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
References: <3a882a7d38c52dc5a14d176f30f8340e AT xs4all DOT nl>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha256;	protocol="application/pgp-signature"; boundary="45Z9DzgjV8m4Oswq"
Content-Disposition: inline
In-Reply-To: <3a882a7d38c52dc5a14d176f30f8340e@xs4all.nl>
User-Agent: Mutt/1.9.2 (2017-12-15)

--45Z9DzgjV8m4Oswq
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Aug  1 12:22, Houder wrote:
> Hi Corinna,
>=20
> Short version of my report (as there is more to say about the implementat=
ion
> of
> "fenv") in Cygwin; this time I restrict myself to a bug in fegetenv() ).
>=20
> (Note to myself: attach STC)
>=20
> I am reporting a bug in fegetenv() in winsup/cygwin/fenv.cc. There is no
> hurry
> in repairing this bug, as "fenv" is hardly ever (never?) used by anyone.
>=20
> fegetenv() should be modified as follows:
>=20
> from:
>   __asm__ volatile ("fnstenv %0" : "=3Dm" (envp->_fpu) : );
>   if (use_sse)
>     __asm__ volatile ("stmxcsr %0" : "=3Dm" (envp->_sse_mxcsr) : );
>   return 0
>=20
> to:
> // Henri: copying glibc ...
>   __asm__ volatile ("fnstenv %0\n"
>                     "fldenv %0" : "=3Dm" (envp->_fpu) : );
>   if (use_sse)
>     __asm__ volatile ("stmxcsr %0" : "=3Dm" (envp->_sse_mxcsr) : );
>   return 0;

Since you know how to fix things, please just send patches to
the cygwin-patches ML.


Thanks,
Corinna

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

--45Z9DzgjV8m4Oswq
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----
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=d7Jr
-----END PGP SIGNATURE-----

--45Z9DzgjV8m4Oswq--