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/* Set floating-point environment exception handling.
Copyright (C) 1997 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <fenv_libc.h>
void
fesetexceptflag (const fexcept_t *flagp, int excepts)
{
fenv_union_t u;
fexcept_t flag;
/* Get the current state. */
u.fenv = fegetenv_register ();
/* Ignore exceptions not listed in 'excepts'. */
flag = *flagp & excepts;
/* Replace the exception status */
u.l[1] = (u.l[1] & ~(FPSCR_STICKY_BITS & excepts)
| flag & FPSCR_STICKY_BITS
| (flag >> (31 - FPSCR_VX) - (31 - FPSCR_VXSOFT)
& FE_INVALID_SOFTWARE));
/* Store the new status word (along with the rest of the environment).
This may cause floating-point exceptions if the restored state
requests it. */
fesetenv_register (u.fenv);
/* Deal with FE_INVALID_SOFTWARE not being implemented on some chips. */
if (flag & FE_INVALID)
feraiseexcept(FE_INVALID);
}
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