| /* Set current rounding direction. |
| Copyright (C) 1997-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Richard Henderson <rth@tamu.edu>, 1997 |
| |
| 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_libc.h> |
| |
| int |
| fesetround (int round) |
| { |
| unsigned long fpcr; |
| |
| if (round & ~3) |
| return 1; |
| |
| /* Get the current state. */ |
| __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr)); |
| |
| /* Set the relevant bits. */ |
| fpcr = ((fpcr & ~FPCR_ROUND_MASK) |
| | ((unsigned long)round << FPCR_ROUND_SHIFT)); |
| |
| /* Put the new state in effect. */ |
| __asm__ __volatile__("mt_fpcr %0; excb" : : "f"(fpcr)); |
| |
| return 0; |
| } |
| libm_hidden_def (fesetround) |
