sys/arch/vax/include/vaxfp.h

   1 /*      $NetBSD: vaxfp.h,v 1.7 2008/04/28 20:23:39 martin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Klaus Klein.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * vaxfp.h defines the layout of VAX Floating-Point data types.
  34  * Only F_floating and D_floating types are defined here;
  35  * G_floating and H_floating are not supported by NetBSD.
  36  */
  37 #ifndef _VAX_VAXFP_H_
  38 #define _VAX_VAXFP_H_
  39
  40 #include <sys/featuretest.h>
  41
  42 #if defined(_NETBSD_SOURCE) || defined(_ISOC99_SOURCE)
  43
  44 typedef int fenv_t;
  45 typedef int fexcept_t;
  46
  47 #define FE_UNDERFLOW    0x01    /* underflow exception */
  48
  49 #define FE_ALL_EXCEPT   0x01
  50
  51 #if !defined(_ISOC99_SOURCE)
  52
  53 #define FFLT_EXPBITS    8
  54 #define FFLT_FRACHBITS  7
  55 #define FFLT_FRACLBITS  16
  56 #define FFLT_FRACBITS   (FFLT_FRACLBITS + FFLT_FRACHBITS)
  57
  58 struct vax_f_floating {
  59         unsigned int    fflt_frach:FFLT_FRACHBITS;
  60         unsigned int    fflt_exp:FFLT_EXPBITS;
  61         unsigned int    fflt_sign:1;
  62         unsigned int    fflt_fracl:FFLT_FRACLBITS;
  63 };
  64
  65 #define DFLT_EXPBITS    8
  66 #define DFLT_FRACHBITS  7
  67 #define DFLT_FRACMBITS  16
  68 #define DFLT_FRACLBITS  32
  69 #define DFLT_FRACBITS   (DFLT_FRACLBITS + DFLT_FRACMBITS + DFLT_FRACHBITS)
  70
  71 struct vax_d_floating {
  72
  73         unsigned int    dflt_frach:DFLT_FRACHBITS;
  74         unsigned int    dflt_exp:DFLT_EXPBITS;
  75         unsigned int    dflt_sign:1;
  76         unsigned int    dflt_fracm:DFLT_FRACMBITS;
  77         unsigned int    dflt_fracl:DFLT_FRACLBITS;
  78 };
  79
  80 /*
  81  * Exponent biases.
  82  */
  83 #define FFLT_EXP_BIAS   128
  84 #define DFLT_EXP_BIAS   128
  85
  86 /*
  87  * Convenience data structures.
  88  */
  89 union vax_ffloating_u {
  90         float                   ffltu_f;
  91         struct vax_f_floating   ffltu_fflt;
  92 };
  93
  94 union vax_dfloating_u {
  95         double                  dfltu_d;
  96         struct vax_d_floating   dfltu_dflt;
  97 };
  98
  99 #endif /* !_ISOC99_SOURCE */
 100
 101 #endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */
 102
 103 #endif /* _VAX_VAXFP_H_ */