/*      $NetBSD: vaxfp.h,v 1.8 2008/08/05 16:47:42 matt Exp $   */

/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

/*
* vaxfp.h defines the layout of VAX Floating-Point data types.
* Only F_floating and D_floating types are defined here;
* G_floating and H_floating are not supported by NetBSD.
*/
#ifndef _VAX_VAXFP_H_
#define _VAX_VAXFP_H_

#include <sys/featuretest.h>

#if defined(_NETBSD_SOURCE) || defined(_ISOC99_SOURCE)

typedef int fenv_t;
typedef int fexcept_t;

#define FE_UNDERFLOW    0x01    /* underflow exception */

#define FE_ALL_EXCEPT   0x01

#if !defined(_ISOC99_SOURCE)

#define FFLT_EXPBITS    8
#define FFLT_FRACHBITS  7
#define FFLT_FRACLBITS  16
#define FFLT_FRACBITS   (FFLT_FRACLBITS + FFLT_FRACHBITS)

struct vax_f_floating {
       unsigned int    fflt_frach:FFLT_FRACHBITS;
       unsigned int    fflt_exp:FFLT_EXPBITS;
       unsigned int    fflt_sign:1;
       unsigned int    fflt_fracl:FFLT_FRACLBITS;
};

#define DFLT_EXPBITS    8
#define DFLT_FRACHBITS  7
#define DFLT_FRACMBITS  16
#define DFLT_FRACLBITS  32
#define DFLT_FRACBITS   (DFLT_FRACLBITS + DFLT_FRACMBITS + DFLT_FRACHBITS)

struct vax_d_floating {

       unsigned int    dflt_frach:DFLT_FRACHBITS;
       unsigned int    dflt_exp:DFLT_EXPBITS;
       unsigned int    dflt_sign:1;
       unsigned int    dflt_fracm:DFLT_FRACMBITS;
       unsigned int    dflt_fracl:DFLT_FRACLBITS;
};

/*
* Exponent biases.
*/
#define FFLT_EXP_BIAS   128
#define DFLT_EXP_BIAS   128

/*
* Convenience data structures.
*/
union vax_ffloating_u {
       float                   ffltu_f;
       struct vax_f_floating   ffltu_fflt;
};

union vax_dfloating_u {
       double                  dfltu_d;
       struct vax_d_floating   dfltu_dflt;
};

#endif /* !_ISOC99_SOURCE */

#endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */

#endif /* _VAX_VAXFP_H_ */