/*      $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_ */