From 361818d50219bd9be2c41954a702b748f2240099 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Thu, 13 Sep 2012 07:35:26 -0700 Subject: [PATCH] alpha: Add get-rounding-mode.h --- ports/ChangeLog.alpha | 4 ++++ ports/sysdeps/alpha/fpu/get-rounding-mode.h | 35 +++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) create mode 100644 ports/sysdeps/alpha/fpu/get-rounding-mode.h 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 + + * sysdeps/alpha/fpu/get-rounding-mode.h: New file. + 2012-08-30 Richard Henderson * 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 + . */ + +#ifndef ALPHA_GET_ROUNDING_MODE_H +#define ALPHA_GET_ROUNDING_MODE_H 1 + +#include +#include + +/* 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 */ -- 2.11.4.GIT