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53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
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/* Clear given exceptions in current floating-point environment.
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Copyright (C) 1998, 1999, 2000, 2002, 2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Alexandre Oliva <aoliva@redhat.com>
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based on corresponding file in the MIPS port.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <fenv.h>
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#include <fenv_libc.h>
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#include <fpu_control.h>
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#include <shlib-compat.h>
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int
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__feclearexcept (int excepts)
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{
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fpu_control_t cw;
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/* Mask out unsupported bits/exceptions. */
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excepts &= FE_ALL_EXCEPT;
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/* Read the complete control word. */
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_FPU_GETCW (cw);
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/* Clear exception flag bits and cause bits. EF bits are cleared by
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assigning 1 to them (and there's no way to set them); other bits
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are copied normally. */
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cw &= ~((excepts << CAUSE_SHIFT) | FE_ALL_EXCEPT);
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cw |= excepts;
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/* Put the new data in effect. */
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_FPU_SETFCW (cw);
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/* Success. */
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return 0;
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}
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versioned_symbol (libm, __feclearexcept, feclearexcept, GLIBC_2_2);
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