89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_FENV_H_
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#define _SYS_FENV_H_
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#include <sys/_types.h>
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#ifndef __fenv_static
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#define __fenv_static static
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#endif
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typedef int fenv_t;
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typedef int fexcept_t;
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/* Exception flags */
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#ifdef __mips_soft_float
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#define _FPUSW_SHIFT 16
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#define FE_INVALID 0x0001
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#define FE_DIVBYZERO 0x0002
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#define FE_OVERFLOW 0x0004
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#define FE_UNDERFLOW 0x0008
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#define FE_INEXACT 0x0010
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#else
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#define _FCSR_CAUSE_SHIFT 10
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#define FE_INVALID 0x0040
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#define FE_DIVBYZERO 0x0020
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#define FE_OVERFLOW 0x0010
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#define FE_UNDERFLOW 0x0008
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#define FE_INEXACT 0x0004
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#endif
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#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
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FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
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/* Rounding modes */
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#define FE_TONEAREST 0x0000
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#define FE_TOWARDZERO 0x0001
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#define FE_UPWARD 0x0002
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#define FE_DOWNWARD 0x0003
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#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
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FE_UPWARD | FE_TOWARDZERO)
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/* Default floating-point environment */
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extern const fenv_t *_fe_dfl_env;
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#define FE_DFL_ENV (_fe_dfl_env)
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/* We need to be able to map status flag positions to mask flag positions */
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#define _ENABLE_SHIFT 5
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#define _ENABLE_MASK (FE_ALL_EXCEPT << _ENABLE_SHIFT)
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#if !defined(__mips_soft_float) && !defined(__mips_hard_float)
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#error compiler didnt set soft/hard float macros
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#endif
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#ifndef __mips_soft_float
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#define __cfc1(__fcsr) __asm __volatile("cfc1 %0, $31" : "=r" (__fcsr))
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#define __ctc1(__fcsr) __asm __volatile("ctc1 %0, $31" :: "r" (__fcsr))
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#endif
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#endif /* !_FENV_H_ */
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