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- /* Copyright (C) 2002-2003, George Thanos <george.thanos@gdt.gr>
- Yannis Mitsos <yannis.mitsos@gdt.gr>
- Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
- 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, 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
- /* Define bits representing the exception. We use the bit positions of
- the appropriate bits in the SR. */
- enum
- {
- FE_INEXACT = (1 << 8),
- #define FE_INEXACT FE_INEXACT
- FE_UNDERFLOW = (1 << 9),
- #define FE_UNDERFLOW FE_UNDERFLOW
- FE_OVERFLOW = (1 << 10),
- #define FE_OVERFLOW FE_OVERFLOW
- FE_DIVBYZERO = (1 << 11),
- #define FE_DIVBYZERO FE_DIVBYZERO
- FE_INVALID = (1 << 12)
- #define FE_INVALID FE_INVALID
- };
- #define FE_ALL_EXCEPT \
- (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
- /* We support all of the four defined rounding modes. We use
- the bit positions in the FPCR Mode Control Byte as the values for the
- appropriate macros. */
- enum
- {
- FE_TONEAREST = 0,
- #define FE_TONEAREST FE_TONEAREST
- FE_TOWARDZERO = 1 << 13 ,
- #define FE_TOWARDZERO FE_TOWARDZERO
- FE_DOWNWARD = 2 << 13,
- #define FE_DOWNWARD FE_DOWNWARD
- FE_UPWARD = 3 << 13
- #define FE_UPWARD FE_UPWARD
- };
- /* Type representing exception flags. */
- typedef unsigned int fexcept_t;
- /* Type representing floating-point environment.*/
- typedef struct
- {
- unsigned int round_mode;
- unsigned int trap_enabled;
- unsigned int accrued_except;
- unsigned int actual_except;
- } fenv_t;
- #if 0
- /* If the default argument is used we use this value. */
- const fenv FE_DFL_ENV_OBJ = {0, 0x1C00, 0}
- #define FE_DFL_ENV (&FE_DFL_ENV_OBJ)
- #ifdef __USE_GNU
- /* Floating-point environment where none of the exceptions are masked. */
- const fenv_t FE_NOMASK_ENV_OBJ = { 0, 0x1F00, 0 };
- # define FE_NOMASK_ENV (&FE_NOMASK_ENV_OBJ)
- #endif
- #endif
- #include <bits/fenvinline.h>
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