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/* 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;
}
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