sys/arch/hppa/include/ieee.h

   1 /*      $NetBSD: ieee.h,v 1.9 2005/12/11 12:17:37 christos Exp $        */
   2
   3 /*      $OpenBSD: ieee.h,v 1.1 1999/04/20 19:44:04 mickey Exp $ */
   4
   5 /*
   6  * Copyright (c) 1992, 1993
   7  *      The Regents of the University of California.  All rights reserved.
   8  *
   9  * This software was developed by the Computer Systems Engineering group
  10  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  11  * contributed to Berkeley.
  12  *
  13  * All advertising materials mentioning features or use of this software
  14  * must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Lawrence Berkeley Laboratory.
  17  *
  18  * Redistribution and use in source and binary forms, with or without
  19  * modification, are permitted provided that the following conditions
  20  * are met:
  21  * 1. Redistributions of source code must retain the above copyright
  22  *    notice, this list of conditions and the following disclaimer.
  23  * 2. Redistributions in binary form must reproduce the above copyright
  24  *    notice, this list of conditions and the following disclaimer in the
  25  *    documentation and/or other materials provided with the distribution.
  26  * 3. Neither the name of the University nor the names of its contributors
  27  *    may be used to endorse or promote products derived from this software
  28  *    without specific prior written permission.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  31  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  34  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  35  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  36  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  37  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  38  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  39  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  40  * SUCH DAMAGE.
  41  *
  42  *      @(#)ieee.h      8.1 (Berkeley) 6/11/93
  43  */
  44
  45 /*
  46  * ieee.h defines the machine-dependent layout of the machine's IEEE
  47  * floating point.  It does *not* define (yet?) any of the rounding
  48  * mode bits, exceptions, and so forth.
  49  */
  50
  51 #include <sys/ieee754.h>
  52
  53 #ifdef _LP64
  54 #define EXT_EXPBITS     15
  55 #define EXT_FRACHBITS   16
  56 #define EXT_FRACHMBITS  32
  57 #define EXT_FRACLMBITS  32
  58 #define EXT_FRACLBITS   32
  59 #define EXT_FRACBITS    (EXT_FRACLBITS + EXT_FRACLMBITS + EXT_FRACHMBITS + EXT_FRACHBITS)
  60
  61 #define EXT_TO_ARRAY32(u, a) do {                       \
  62         (a)[0] = (uint32_t)(u).extu_ext.ext_fracl;      \
  63         (a)[1] = (uint32_t)(u).extu_ext.ext_fraclm;     \
  64         (a)[2] = (uint32_t)(u).extu_ext.ext_frachm;     \
  65         (a)[3] = (uint32_t)(u).extu_ext.ext_frach;      \
  66 } while(/*CONSTCOND*/0)
  67
  68 struct ieee_ext {
  69         u_int   ext_sign:1;
  70         u_int   ext_exp:EXT_EXPBITS;
  71         u_int   ext_frach:EXT_FRACHBITS;
  72         u_int   ext_frachm;
  73         u_int   ext_fraclm;
  74         u_int   ext_fracl;
  75 };
  76
  77 /*
  78  * Floats whose exponent is in [1..INFNAN) (of whatever type) are
  79  * `normal'.  Floats whose exponent is INFNAN are either Inf or NaN.
  80  * Floats whose exponent is zero are either zero (iff all fraction
  81  * bits are zero) or subnormal values.
  82  *
  83  * A NaN is a `signalling NaN' if its QUIETNAN bit is set in its
  84  * high fraction; if the bit is clear, it is a `quiet NaN'.
  85  */
  86 #define EXT_EXP_INFNAN  32767
  87
  88 #if 0
  89 #define SNG_QUIETNAN    (1 << 22)
  90 #define DBL_QUIETNAN    (1 << 19)
  91 #define EXT_QUIETNAN    (1 << 15)
  92 #endif
  93
  94 /*
  95  * Exponent biases.
  96  */
  97 #define EXT_EXP_BIAS    16383
  98
  99 /*
 100  * Convenience data structures.
 101  */
 102 union ieee_ext_u {
 103         long double             extu_ld;
 104         struct ieee_ext         extu_ext;
 105 };
 106 #endif /* _LP64 */