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/* Set floating-point environment exception handling.
Copyright (C) 1998-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Alexandre Oliva <aoliva@redhat.com>
based on corresponding file in the MIPS port.
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.h>
#include <fpu_control.h>
#include <shlib-compat.h>
int
__fesetexceptflag (const fexcept_t *flagp, int excepts)
{
fpu_control_t cw, temp;
/* Get the current exceptions. */
_FPU_GETCW (cw);
/* Make sure the flags we want restored are legal. */
excepts &= FE_ALL_EXCEPT;
temp = *flagp & excepts;
/* If EF bits are clear and the user requests them to be set,
we have to fail, because there's no way to do it. */
if (~(cw & excepts) & temp)
return -1;
/* We clear EF bits by storing a 1 in them, so flip the
FE_ALL_EXCEPT bits. */
temp = (~temp & FE_ALL_EXCEPT);
/* Now clear the bits called for, and copy them in from flagp. Note that
we ignore all non-flag bits from *flagp, so they don't matter. */
cw = (cw & ~FE_ALL_EXCEPT) | temp;
_FPU_SETFCW (cw);
/* Success. */
return 0;
}
versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);
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