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alpha: Add get-rounding-mode.h

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Richard Henderson 2012-09-13 07:35:26 -07:00
parent b2d36dda9b
commit 361818d502
2 changed files with 39 additions and 0 deletions
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ports/ChangeLog.alpha
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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

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ports/sysdeps/alpha/fpu/get-rounding-mode.h Normal file
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/* 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 */