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/* Raise given exceptions.
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>
#undef feraiseexcept
void
feraiseexcept (int excepts)
{
fenv_union_t u;
/* Raise exceptions represented by EXCEPTS. It is the responsibility of
the OS to ensure that if multiple exceptions occur they are fed back
to this process in the proper way; this can happen in hardware,
anyway (in particular, inexact with overflow or underflow). */
/* Get the current state. */
u.fenv = fegetenv_register ();
/* Add the exceptions */
u.l[1] = (u.l[1]
| (excepts & FPSCR_STICKY_BITS)
/* Turn FE_INVALID into FE_INVALID_SOFTWARE. */
| (excepts >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT))
& FE_INVALID_SOFTWARE));
/* Store the new status word (along with the rest of the environment),
triggering any appropriate exceptions. */
fesetenv_register (u.fenv);
if ((excepts & FE_INVALID)
/* For some reason, some PowerPC chips (the 601, in particular)
don't have FE_INVALID_SOFTWARE implemented. Detect this
case and raise FE_INVALID_SNAN instead. */
&& !fetestexcept (FE_INVALID))
set_fpscr_bit (FPSCR_VXSNAN);
}
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