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/* Clear given exceptions in current floating-point environment.
Copyright (C) 2000-2017 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
<http://www.gnu.org/licenses/>. */
#include <fenv_libc.h>
#include <fpu_control.h>
int
feclearexcept (int excepts)
{
fexcept_t temp;
/* Mask out unsupported bits/exceptions. */
excepts &= FE_ALL_EXCEPT;
_FPU_GETCW (temp);
/* Clear the relevant bits. */
temp &= ~(excepts << FPC_FLAGS_SHIFT);
if ((temp & FPC_NOT_FPU_EXCEPTION) == 0)
/* Bits 6, 7 of dxc-byte are zero,
thus bits 0-5 of dxc-byte correspond to the flag-bits.
Clear the relevant bits in flags and dxc-field. */
temp &= ~(excepts << FPC_DXC_SHIFT);
/* Put the new data in effect. */
_FPU_SETCW (temp);
/* Success. */
return 0;
}
libm_hidden_def (feclearexcept)
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