|
Packit |
6c4009 |
/* Set current rounding direction.
|
|
Packit |
6c4009 |
Copyright (C) 1997-2018 Free Software Foundation, Inc.
|
|
Packit |
6c4009 |
This file is part of the GNU C Library.
|
|
Packit |
6c4009 |
Contributed by Richard Henderson <rth@tamu.edu>, 1997
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is free software; you can redistribute it and/or
|
|
Packit |
6c4009 |
modify it under the terms of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License as published by the Free Software Foundation; either
|
|
Packit |
6c4009 |
version 2.1 of the License, or (at your option) any later version.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
Packit |
6c4009 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
6c4009 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
6c4009 |
Lesser General Public License for more details.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
You should have received a copy of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License along with the GNU C Library. If not, see
|
|
Packit |
6c4009 |
<http://www.gnu.org/licenses/>. */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <fenv_libc.h>
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
int
|
|
Packit |
6c4009 |
__fesetround (int round)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
unsigned long fpcr;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (round & ~3)
|
|
Packit |
6c4009 |
return 1;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Get the current state. */
|
|
Packit |
6c4009 |
__asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr));
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Set the relevant bits. */
|
|
Packit |
6c4009 |
fpcr = ((fpcr & ~FPCR_ROUND_MASK)
|
|
Packit |
6c4009 |
| ((unsigned long)round << FPCR_ROUND_SHIFT));
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Put the new state in effect. */
|
|
Packit |
6c4009 |
__asm__ __volatile__("mt_fpcr %0; excb" : : "f"(fpcr));
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
return 0;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
libm_hidden_def (__fesetround)
|
|
Packit |
6c4009 |
weak_alias (__fesetround, fesetround)
|
|
Packit |
6c4009 |
libm_hidden_weak (fesetround)
|