mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 19:00:07 +00:00
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/* Enable floating-point exceptions.
|
|
Copyright (C) 2000 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 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_libc.h>
|
|
|
|
int
|
|
feenableexcept (int excepts)
|
|
{
|
|
fenv_union_t fe;
|
|
int result, new;
|
|
|
|
result = fegetexcept ();
|
|
|
|
if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID)
|
|
excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID;
|
|
|
|
fe.fenv = fegetenv_register ();
|
|
if (excepts & FE_INEXACT)
|
|
fe.l[1] |= (1 << (31 - FPSCR_XE));
|
|
if (excepts & FE_DIVBYZERO)
|
|
fe.l[1] |= (1 << (31 - FPSCR_ZE));
|
|
if (excepts & FE_UNDERFLOW)
|
|
fe.l[1] |= (1 << (31 - FPSCR_UE));
|
|
if (excepts & FE_OVERFLOW)
|
|
fe.l[1] |= (1 << (31 - FPSCR_OE));
|
|
if (excepts & FE_INVALID)
|
|
fe.l[1] |= (1 << (31 - FPSCR_VE));
|
|
fesetenv_register (fe.fenv);
|
|
|
|
new = fegetexcept ();
|
|
if (new != 0 && result == 0)
|
|
(void)__fe_nomask_env ();
|
|
|
|
if ((new & excepts) != excepts)
|
|
result = -1;
|
|
|
|
return result;
|
|
}
|