68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/* Raise given exceptions.
|
|
Copyright (C) 1997-2022 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 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <fenv_libc.h>
|
|
|
|
int
|
|
__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 = (u.l
|
|
| (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. */
|
|
u.fenv = fegetenv_register ();
|
|
if ((u.l & FE_INVALID) == 0)
|
|
set_fpscr_bit (FPSCR_VXSNAN);
|
|
}
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|
|
|
|
#include <shlib-compat.h>
|
|
#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
|
|
strong_alias (__feraiseexcept, __old_feraiseexcept)
|
|
compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
|
|
#endif
|
|
|
|
libm_hidden_def (__feraiseexcept)
|
|
libm_hidden_ver (__feraiseexcept, feraiseexcept)
|
|
versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
|