mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-14 15:20:04 +00:00
100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
/* Internal libc stuff for floating point environment routines. e500 version.
|
|
Copyright (C) 2004-2013 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 _FENV_LIBC_H
|
|
#define _FENV_LIBC_H 1
|
|
|
|
#include <fenv.h>
|
|
|
|
/* ldbl-128ibm code uses __fegetround. */
|
|
#define __fegetround() fegetround ()
|
|
|
|
int __feraiseexcept_spe (int);
|
|
libm_hidden_proto (__feraiseexcept_spe)
|
|
|
|
int __fexcepts_to_spe (int);
|
|
libm_hidden_proto (__fexcepts_to_spe)
|
|
|
|
int __fexcepts_from_spe (int);
|
|
libm_hidden_proto (__fexcepts_from_spe)
|
|
|
|
int __fexcepts_to_prctl (int);
|
|
libm_hidden_proto (__fexcepts_to_prctl)
|
|
|
|
int __fexcepts_from_prctl (int);
|
|
libm_hidden_proto (__fexcepts_from_prctl)
|
|
|
|
void __fe_note_change (void);
|
|
libm_hidden_proto (__fe_note_change)
|
|
|
|
/* Equivalent to fegetenv, but returns an unsigned int instead of
|
|
taking a pointer. */
|
|
#define fegetenv_register() \
|
|
({ unsigned int fscr; asm volatile ("mfspefscr %0" : "=r" (fscr)); fscr; })
|
|
|
|
/* Equivalent to fesetenv, but takes an unsigned int 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,
|
|
/* Combination of the exception bits. */
|
|
SPEFSCR_ALL_EXCEPT = 0x003e0000,
|
|
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,
|
|
/* Combination of the exception trap enable bits. */
|
|
SPEFSCR_ALL_EXCEPT_ENABLE = 0x0000007c,
|
|
SPEFSCR_FRMC = 0x00000003
|
|
};
|
|
|
|
#endif /* fenv_libc.h */
|