| /* Set current rounding direction. |
| Copyright (C) 2000-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by David Huggins-Daines <dhd@debian.org>, 2000 |
| |
| 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.h> |
| |
| int |
| fesetround (int round) |
| { |
| union { unsigned long long l; unsigned int sw[2]; } s; |
| |
| if (round & ~FE_DOWNWARD) |
| /* round is not a valid rounding mode. */ |
| return 1; |
| |
| /* Get the current status word. */ |
| __asm__ ("fstd %%fr0,0(%1)" : "=m" (s.l) : "r" (&s.l) : "%r0"); |
| s.sw[0] &= ~FE_DOWNWARD; |
| s.sw[0] |= round & FE_DOWNWARD; |
| __asm__ ("fldd 0(%0),%%fr0" : : "r" (&s.l), "m" (s.l) : "%r0"); |
| |
| return 0; |
| } |
| |
| libm_hidden_def (fesetround) |
