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| author | Ulrich Drepper <drepper@redhat.com> | 1999-11-12 17:23:30 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 1999-11-12 17:23:30 +0000 |
| commit | 05ef7ce90dbb9125cdcd6ea2525efad6d1c585b7 (patch) | |
| tree | 5102b915804cf59ef63ca6a05a2cba1127cfe649 /sysdeps/i386/fpu/feenablxcpt.c | |
| parent | b2f46c3c0e2119545e52a01e1d73a93d21ebbc0d (diff) | |
| download | glibc-05ef7ce90dbb9125cdcd6ea2525efad6d1c585b7.tar glibc-05ef7ce90dbb9125cdcd6ea2525efad6d1c585b7.tar.gz glibc-05ef7ce90dbb9125cdcd6ea2525efad6d1c585b7.tar.bz2 glibc-05ef7ce90dbb9125cdcd6ea2525efad6d1c585b7.zip | |
Update.
1999-11-02 Andreas Jaeger <aj@suse.de>
* Versions.def: Add version GLIBC_2.2 for libm.
* math/fenv.h: Add prototypes for fegetexcept, feenableexcept and
fedisableexcept.
* sysdeps/generic/feenablxcpt.c: Stub file.
* sysdeps/generic/fedisblxcpt.c: Stub file.
* sysdeps/generic/fegetexcept.c: Stub file.
* sysdeps/i386/fpu/fedisblxcpt.c: New file.
* sysdeps/i386/fpu/feenablxcpt.c: New file.
* sysdeps/i386/fpu/fegetexcept.c: New file.
* math/Makefile (libm-support): Add new files.
* math/Versions: Add new functions with version GLIBC_2.2.
* manual/arith.texi (Control Functions): Document fegetexcept,
feenableexcept and fedisableexcept.
Diffstat (limited to 'sysdeps/i386/fpu/feenablxcpt.c')
| -rw-r--r-- | sysdeps/i386/fpu/feenablxcpt.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/sysdeps/i386/fpu/feenablxcpt.c b/sysdeps/i386/fpu/feenablxcpt.c new file mode 100644 index 0000000000..b9877d4e14 --- /dev/null +++ b/sysdeps/i386/fpu/feenablxcpt.c @@ -0,0 +1,38 @@ +/* Enable floating-point exceptions. + Copyright (C) 1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Jaeger <aj@suse.de>, 1999. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> + +int +feenableexcept (int excepts) +{ + unsigned short int new_exc, old_exc; + + /* Get the current control word. */ + __asm__ ("fstcw %0" : "=m" (*&new_exc)); + + excepts &= FE_ALL_EXCEPT; + old_exc = new_exc & FE_ALL_EXCEPT; + + new_exc |= excepts; + __asm__ ("fldcw %0" : : "m" (*&new_exc)); + + return old_exc; +} |