mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-01 17:30:07 +00:00
81ecb0ee49
fegetenv_status is used variously to retrieve the FPSCR exception enable bits, rounding mode bits, or both. These are referred to as the control bits in the POWER ISA. FPSCR status bits are also returned by the 'mffs' and 'mffsl' instructions, but they are uniformly ignored by all uses of fegetenv_status. Change the name to be reflective of its current and expected use. Reviewed-By: Paul E Murphy <murphyp@linux.ibm.com>
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* Enable floating-point exceptions.
|
|
Copyright (C) 2000-2019 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
|
|
<https://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_control ();
|
|
result = fenv_reg_to_exceptions (fe.l);
|
|
|
|
if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID)
|
|
excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID;
|
|
|
|
new = fenv_exceptions_to_reg (excepts);
|
|
|
|
if (fenv_reg_to_exceptions (new) != excepts)
|
|
return -1;
|
|
|
|
/* Sets the new exception mask. */
|
|
fe.l |= new;
|
|
|
|
if (fe.l != curr.l)
|
|
fesetenv_mode (fe.fenv);
|
|
|
|
__TEST_AND_EXIT_NON_STOP (0ULL, fe.l);
|
|
|
|
return result;
|
|
}
|