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/* $NetBSD: fenv.h,v 1.2 2017/01/14 12:00:13 martin Exp $ */
/*-
* Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _SYS_FENV_H_
#define _SYS_FENV_H_
#include <stdint.h>
#ifdef __arch64__
typedef uint64_t fenv_t;
typedef uint64_t fexcept_t;
#else
typedef uint32_t fenv_t;
typedef uint32_t fexcept_t;
#endif
/*
* Exception flags
*
* Symbols are defined in such a way, to correspond to the accrued
* exception bits (aexc) fields of FSR.
*/
#define FE_INEXACT 0x00000020 /* 0000100000 */
#define FE_DIVBYZERO 0x00000040 /* 0001000000 */
#define FE_UNDERFLOW 0x00000080 /* 0010000000 */
#define FE_OVERFLOW 0x00000100 /* 0100000000 */
#define FE_INVALID 0x00000200 /* 1000000000 */
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
/*
* Rounding modes
*
* We can't just use the hardware bit values here, because that would
* make FE_UPWARD and FE_DOWNWARD negative, which is not allowed.
*/
#define FE_TONEAREST 0 /* round to nearest representable number */
#define FE_TOWARDZERO 1 /* round to zero (truncate) */
#define FE_UPWARD 2 /* round toward positive infinity */
#define FE_DOWNWARD 3 /* round toward negative infinity */
#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
FE_UPWARD | FE_TOWARDZERO)
#define _ROUND_SHIFT 30
/* We need to be able to map status flag positions to mask flag positions */
#define _FPUSW_SHIFT 18
#define _ENABLE_MASK (FE_ALL_EXCEPT << _FPUSW_SHIFT)
#endif /* !_SYS_FENV_H_ */
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