diff options
Diffstat (limited to 'sysdeps/alpha/fpu/get-rounding-mode.h')
-rw-r--r-- | sysdeps/alpha/fpu/get-rounding-mode.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sysdeps/alpha/fpu/get-rounding-mode.h b/sysdeps/alpha/fpu/get-rounding-mode.h new file mode 100644 index 0000000000..f0c5549584 --- /dev/null +++ b/sysdeps/alpha/fpu/get-rounding-mode.h @@ -0,0 +1,35 @@ +/* Determine floating-point rounding mode within libc. Alpha version. + Copyright (C) 2012-2014 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 + <http://www.gnu.org/licenses/>. */ + +#ifndef ALPHA_GET_ROUNDING_MODE_H +#define ALPHA_GET_ROUNDING_MODE_H 1 + +#include <fenv.h> +#include <fenv_libc.h> + +/* Return the floating-point rounding mode. */ + +static inline int +get_rounding_mode (void) +{ + unsigned long fpcr; + __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr)); + return (fpcr >> FPCR_ROUND_SHIFT) & 3; +} + +#endif /* get-rounding-mode.h */ |