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/* Test exception in current environment.
Copyright (C) 2000-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com).
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>
#include <fpu_control.h>
int
fetestexcept (int excepts)
{
fexcept_t temp, res;
/* Get current exceptions. */
_FPU_GETCW (temp);
res = temp >> 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.
Evaluate flags and last dxc-exception-code. */
res |= temp >> FPC_DXC_SHIFT;
return res & excepts & FE_ALL_EXCEPT;
}
libm_hidden_def (fetestexcept)
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