diff options
| -rw-r--r-- | ports/ChangeLog.alpha | 4 | ||||
| -rw-r--r-- | ports/sysdeps/alpha/fpu/get-rounding-mode.h | 35 |
2 files changed, 39 insertions, 0 deletions
diff --git a/ports/ChangeLog.alpha b/ports/ChangeLog.alpha index 9589dd338d..fbe42ac95b 100644 --- a/ports/ChangeLog.alpha +++ b/ports/ChangeLog.alpha @@ -1,3 +1,7 @@ +2012-12-13 Richard Henderson <rth@redhat.com> + + * sysdeps/alpha/fpu/get-rounding-mode.h: New file. + 2012-08-30 Richard Henderson <rth@redhat.com> * sysdeps/alpha/fpu/s_isnan.c: Define all aliases in terms of diff --git a/ports/sysdeps/alpha/fpu/get-rounding-mode.h b/ports/sysdeps/alpha/fpu/get-rounding-mode.h new file mode 100644 index 0000000000..9d5b7246a6 --- /dev/null +++ b/ports/sysdeps/alpha/fpu/get-rounding-mode.h @@ -0,0 +1,35 @@ +/* Determine floating-point rounding mode within libc. Alpha version. + Copyright (C) 2012 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 */ |