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97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/* Copyright (C) 1999-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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, see
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<http://www.gnu.org/licenses/>. */
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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 FPSR... (Tahoe EAS 2.4 5-4)*/
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enum
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{
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FE_INEXACT =
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#define FE_INEXACT (1 << 5)
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FE_INEXACT,
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FE_UNDERFLOW =
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#define FE_UNDERFLOW (1 << 4)
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FE_UNDERFLOW,
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FE_OVERFLOW =
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#define FE_OVERFLOW (1 << 3)
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FE_OVERFLOW,
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FE_DIVBYZERO =
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#define FE_DIVBYZERO (1 << 2)
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FE_DIVBYZERO,
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FE_UNNORMAL =
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#define FE_UNNORMAL (1 << 1)
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FE_UNNORMAL,
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FE_INVALID =
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#define FE_INVALID (1 << 0)
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FE_INVALID,
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FE_ALL_EXCEPT =
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#define FE_ALL_EXCEPT (FE_INEXACT | FE_UNDERFLOW | FE_OVERFLOW | FE_DIVBYZERO | FE_UNNORMAL | FE_INVALID)
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FE_ALL_EXCEPT
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};
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enum
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{
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FE_TOWARDZERO =
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#define FE_TOWARDZERO 3
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FE_TOWARDZERO,
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FE_UPWARD =
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#define FE_UPWARD 2
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FE_UPWARD,
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FE_DOWNWARD =
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#define FE_DOWNWARD 1
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FE_DOWNWARD,
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FE_TONEAREST =
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#define FE_TONEAREST 0
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FE_TONEAREST,
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};
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/* Type representing exception flags. */
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typedef unsigned long int fexcept_t;
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/* Type representing floating-point environment. */
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typedef unsigned long int fenv_t;
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/* If the default argument is used we use this value. */
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#define FE_DFL_ENV ((const fenv_t *) 0xc009804c0270033fUL)
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#ifdef __USE_GNU
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/* Floating-point environment where only FE_UNNORMAL is masked since this
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exception is not generally supported by glibc. */
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# define FE_NOMASK_ENV ((const fenv_t *) 0xc009804c02700302UL)
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/* Floating-point environment with (processor-dependent) non-IEEE
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floating point. In this case, turning on flush-to-zero mode for
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s0, s2, and s3. */
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# define FE_NONIEEE_ENV ((const fenv_t *) 0xc009a04d0270037fUL)
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#endif
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