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46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* Clear given exceptions in current floating-point environment.
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Copyright (C) 2000-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <fenv_libc.h>
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#include <fpu_control.h>
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int
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feclearexcept (int excepts)
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{
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fexcept_t temp;
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/* Mask out unsupported bits/exceptions. */
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excepts &= FE_ALL_EXCEPT;
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_FPU_GETCW (temp);
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/* Clear the relevant bits. */
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temp &= ~(excepts << FPC_FLAGS_SHIFT);
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if ((temp & FPC_NOT_FPU_EXCEPTION) == 0)
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/* Bits 6, 7 of dxc-byte are zero,
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thus bits 0-5 of dxc-byte correspond to the flag-bits.
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Clear the relevant bits in flags and dxc-field. */
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temp &= ~(excepts << FPC_DXC_SHIFT);
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/* Put the new data in effect. */
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_FPU_SETCW (temp);
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/* Success. */
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return 0;
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}
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libm_hidden_def (feclearexcept)
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