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phoenix |
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/* Copyright (C) 2002-2003, George Thanos <george.thanos@gdt.gr>
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Yannis Mitsos <yannis.mitsos@gdt.gr>
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Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _FENV_H
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# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
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#endif
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/* Define bits representing the exception. We use the bit positions of
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the appropriate bits in the SR. */
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enum
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{
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FE_INEXACT = (1 << 8),
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#define FE_INEXACT FE_INEXACT
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FE_UNDERFLOW = (1 << 9),
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#define FE_UNDERFLOW FE_UNDERFLOW
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FE_OVERFLOW = (1 << 10),
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#define FE_OVERFLOW FE_OVERFLOW
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FE_DIVBYZERO = (1 << 11),
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#define FE_DIVBYZERO FE_DIVBYZERO
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FE_INVALID = (1 << 12)
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#define FE_INVALID FE_INVALID
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};
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#define FE_ALL_EXCEPT \
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(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
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/* We support all of the four defined rounding modes. We use
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the bit positions in the FPCR Mode Control Byte as the values for the
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appropriate macros. */
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enum
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{
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FE_TONEAREST = 0,
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#define FE_TONEAREST FE_TONEAREST
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FE_TOWARDZERO = 1 << 13 ,
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#define FE_TOWARDZERO FE_TOWARDZERO
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FE_DOWNWARD = 2 << 13,
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#define FE_DOWNWARD FE_DOWNWARD
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FE_UPWARD = 3 << 13
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#define FE_UPWARD FE_UPWARD
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};
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/* Type representing exception flags. */
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typedef unsigned int fexcept_t;
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/* Type representing floating-point environment.*/
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typedef struct
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{
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unsigned int round_mode;
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unsigned int trap_enabled;
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unsigned int accrued_except;
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unsigned int actual_except;
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} fenv_t;
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#if 0
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/* If the default argument is used we use this value. */
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const fenv FE_DFL_ENV_OBJ = {0, 0x1C00, 0}
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#define FE_DFL_ENV (&FE_DFL_ENV_OBJ)
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#ifdef __USE_GNU
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/* Floating-point environment where none of the exceptions are masked. */
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const fenv_t FE_NOMASK_ENV_OBJ = { 0, 0x1F00, 0 };
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# define FE_NOMASK_ENV (&FE_NOMASK_ENV_OBJ)
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#endif
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#endif
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#include <bits/fenvinline.h>
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