mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/* Enable floating-point exceptions.
|
|
Copyright (C) 2000-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Geoffrey Keating <geoffk@geoffk.org>, 2000.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <fenv_libc.h>
|
|
|
|
int
|
|
feenableexcept (int excepts)
|
|
{
|
|
fenv_union_t fe, curr;
|
|
int result, new;
|
|
|
|
/* Get current exception mask to return. */
|
|
fe.fenv = curr.fenv = fegetenv_register ();
|
|
result = fenv_reg_to_exceptions (fe.l);
|
|
|
|
if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID)
|
|
excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID;
|
|
|
|
/* Sets the new exception mask. */
|
|
if (excepts & FE_INEXACT)
|
|
fe.l |= (1 << (31 - FPSCR_XE));
|
|
if (excepts & FE_DIVBYZERO)
|
|
fe.l |= (1 << (31 - FPSCR_ZE));
|
|
if (excepts & FE_UNDERFLOW)
|
|
fe.l |= (1 << (31 - FPSCR_UE));
|
|
if (excepts & FE_OVERFLOW)
|
|
fe.l |= (1 << (31 - FPSCR_OE));
|
|
if (excepts & FE_INVALID)
|
|
fe.l |= (1 << (31 - FPSCR_VE));
|
|
|
|
if (fe.l != curr.l)
|
|
fesetenv_register (fe.fenv);
|
|
|
|
new = __fegetexcept ();
|
|
if (new != 0 && result == 0)
|
|
(void) __fe_nomask_env_priv ();
|
|
|
|
if ((new & excepts) != excepts)
|
|
result = -1;
|
|
|
|
return result;
|
|
}
|