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/* Internal libc stuff for floating point environment routines.
Copyright (C) 2004 Free Software Foundation, Inc.
Contributed by Aldy Hernandez <aldyh@redhat.com>, 2004
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 _FENV_LIBC_H
#define _FENV_LIBC_H 1
#include <fenv.h>
extern int __feraiseexcept_internal (int __excepts);
/* Equivalent to fegetenv, but returns a fenv_t instead of taking a
pointer. */
#define fegetenv_register() \
({ unsigned fscr; __asm__ __volatile__ ("mfspefscr %0" : "=r" (fscr)); fscr; })
/* Equivalent to fesetenv, but takes a fenv_t instead of a pointer. */
#define fesetenv_register(fscr) \
({ __asm__ __volatile__ ("mtspefscr %0" : : "r" (fscr)); })
typedef union
{
fenv_t fenv;
unsigned int l[2];
} fenv_union_t;
/* Definitions of all the SPEFSCR bit numbers. */
enum {
SPEFSCR_SOVH = 0x80000000,
SPEFSCR_OVH = 0x40000000,
SPEFSCR_FGH = 0x20000000,
SPEFSCR_FXH = 0x10000000,
SPEFSCR_FINVH = 0x08000000,
SPEFSCR_FDBZH = 0x04000000,
SPEFSCR_FUNFH = 0x02000000,
SPEFSCR_FOVFH = 0x01000000,
/* 2 unused bits. */
SPEFSCR_FINXS = 0x00200000,
SPEFSCR_FINVS = 0x00100000,
SPEFSCR_FDBZS = 0x00080000,
SPEFSCR_FUNFS = 0x00040000,
SPEFSCR_FOVFS = 0x00020000,
SPEFSCR_MODE = 0x00010000,
SPEFSCR_SOV = 0x00008000,
SPEFSCR_OV = 0x00004000,
SPEFSCR_FG = 0x00002000,
SPEFSCR_FX = 0x00001000,
SPEFSCR_FINV = 0x00000800,
SPEFSCR_FDBZ = 0x00000400,
SPEFSCR_FUNF = 0x00000200,
SPEFSCR_FOVF = 0x00000100,
/* 1 unused bit. */
SPEFSCR_FINXE = 0x00000040,
SPEFSCR_FINVE = 0x00000020,
SPEFSCR_FDBZE = 0x00000010,
SPEFSCR_FUNFE = 0x00000008,
SPEFSCR_FOVFE = 0x00000004,
SPEFSCR_FRMC = 0x00000003
};
#endif /* fenv_libc.h */
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