diff options
Diffstat (limited to 'libm/arc/fesetround.c')
-rw-r--r-- | libm/arc/fesetround.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/libm/arc/fesetround.c b/libm/arc/fesetround.c new file mode 100644 index 000000000..e156e9cf5 --- /dev/null +++ b/libm/arc/fesetround.c @@ -0,0 +1,36 @@ +/* Set current rounding direction. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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.h> +#include "fenv_private.h" + +int +fesetround (int round) +{ + unsigned int fpcr; + + _FPU_GETCW (fpcr); + + if (((fpcr >> __FPU_RND_SHIFT) & __FPU_RND_MASK) != round) + { + fpcr &= ~(__FPU_RND_MASK << __FPU_RND_SHIFT); + fpcr |= (round & __FPU_RND_MASK) << __FPU_RND_SHIFT; + _FPU_SETCW (fpcr); + } + + return 0; +} |