47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* Clear given exceptions in current floating-point environment.
|
|
Copyright (C) 2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
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.h>
|
|
#include <fenv_libc.h>
|
|
#include <fpu_control.h>
|
|
|
|
int
|
|
feclearexcept (int excepts)
|
|
{
|
|
int cw;
|
|
|
|
/* Mask out unsupported bits/exceptions. */
|
|
excepts &= FE_ALL_EXCEPT;
|
|
|
|
/* Read the complete control word. */
|
|
_FPU_GETCW (cw);
|
|
|
|
/* Clear exception flag bits and cause bits. If the cause bit is not
|
|
cleared, the next CTC instruction (just below) will re-generate the
|
|
exception. */
|
|
|
|
cw &= ~(excepts | (excepts << CAUSE_SHIFT));
|
|
|
|
/* Put the new data in effect. */
|
|
_FPU_SETCW (cw);
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|
|
libm_hidden_def (feclearexcept)
|