diff options
Diffstat (limited to 'libc/sysdeps/linux/sh/bits/fenv.h')
| -rw-r--r-- | libc/sysdeps/linux/sh/bits/fenv.h | 81 |
1 files changed, 46 insertions, 35 deletions
diff --git a/libc/sysdeps/linux/sh/bits/fenv.h b/libc/sysdeps/linux/sh/bits/fenv.h index b192d9433..cbbad92e1 100644 --- a/libc/sysdeps/linux/sh/bits/fenv.h +++ b/libc/sysdeps/linux/sh/bits/fenv.h @@ -1,61 +1,72 @@ -/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. +/* Copyright (C) 1999, 2000 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 Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. + 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 - Library General Public License for more details. + Lesser General Public License for more details. - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ #ifndef _FENV_H # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." #endif -/* Here should be the exception be defined: - FE_INVALID - FE_DIVBYZERO - FE_OVERFLOW - FE_UNDERFLOW - FE_INEXACT - We define no macro which signals no exception is supported. */ - -#define FE_ALL_EXCEPT 0 +/* Define bits representing the exception. We use the bit positions + of the appropriate bits in the FPU control word. */ +enum + { + FE_INEXACT = 0x04, +#define FE_INEXACT FE_INEXACT + FE_UNDERFLOW = 0x08, +#define FE_UNDERFLOW FE_UNDERFLOW + FE_OVERFLOW = 0x10, +#define FE_OVERFLOW FE_OVERFLOW + FE_DIVBYZERO = 0x20, +#define FE_DIVBYZERO FE_DIVBYZERO + FE_INVALID = 0x40, +#define FE_INVALID FE_INVALID + }; +#define FE_ALL_EXCEPT \ + (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) -/* Here should the rounding modes be defined: - FE_TONEAREST - FE_DOWNWARD - FE_UPWARD - FE_TOWARDZERO - We define no macro which signals no rounding mode is selectable. */ +/* The SH FPU supports all of the four defined rounding modes. We + use again the bit positions in the FPU control word as the values + for the appropriate macros. */ +enum + { + FE_TONEAREST = 0x0, +#define FE_TONEAREST FE_TONEAREST + FE_TOWARDZERO = 0x1, +#define FE_TOWARDZERO FE_TOWARDZERO + FE_UPWARD = 0x2, +#define FE_UPWARD FE_UPWARD + FE_DOWNWARD = 0x3 +#define FE_DOWNWARD FE_DOWNWARD + }; -/* Type representing exception flags. - XXX Probably we should also include the signal handler here. */ -typedef struct - { - unsigned int __flags; - } -fexcept_t; +/* Type representing exception flags. */ +typedef unsigned short int fexcept_t; -/* Type representing floating-point environment. */ +/* Type representing floating-point environment. This function corresponds + to the layout of the block written by the `fstenv'. */ typedef struct { - fexcept_t __excepts; - /* XXX I don't know what else we should save. */ + unsigned int __fpscr; } fenv_t; /* If the default argument is used we use this value. */ -#define FE_DFL_ENV ((fenv_t *) -1l) +#define FE_DFL_ENV ((fenv_t *) -1) |