fbsdcompat/_fpmath.h

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*-
  24  * Copyright (c) 2002, 2003 David Schultz <dschultz@uclink.Berkeley.EDU>
  25  * All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  37  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  39  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  40  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  41  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  42  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  44  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  45  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  46  * SUCH DAMAGE.
  47  *
  48  * $FreeBSD: src/lib/libc/i386/_fpmath.h,v 1.3 2004/01/18 07:57:01 das Exp $
  49  */
  50
  51 #if defined(__ppc__) || defined(__ppc64__)
  52
  53 union IEEEl2bits {
  54         long double     e;
  55         double          d[2];
  56         struct {
  57                 unsigned long long      sign    :1;
  58                 unsigned long long      exp     :11;
  59                 unsigned long long      manh    :52;
  60                 unsigned long long      sign2   :1;
  61                 unsigned long long      exp2    :11;
  62                 unsigned long long      manl    :52;
  63         } bits;
  64 };
  65
  66 #define mask_nbit_l(u)  ((void)0)
  67 #define LDBL_IMPLICIT_NBIT
  68
  69 #define LDBL_MANH_SIZE  52
  70 #define LDBL_MANL_SIZE  53      // includes hidden bit
  71
  72 #define LDBL_HEAD_TAIL_PAIR
  73
  74 __private_extern__ void _ldbl2array32dd(union IEEEl2bits, uint32_t *);
  75
  76 #define LDBL_TO_ARRAY32(u, a) _ldbl2array32dd(u, a)
  77
  78 #elif defined(__i386__) || defined(__x86_64__)
  79
  80 union IEEEl2bits {
  81         long double     e;
  82         struct {
  83                 unsigned int    manl    :32;
  84                 unsigned int    manh    :32;
  85                 unsigned int    exp     :15;
  86                 unsigned int    sign    :1;
  87                 unsigned int    junk    :16;
  88         } bits;
  89 };
  90
  91 #define mask_nbit_l(u)  ((u).bits.manh &= 0x7fffffff)
  92
  93 #define LDBL_MANH_SIZE  32
  94 #define LDBL_MANL_SIZE  32
  95
  96 #define LDBL_TO_ARRAY32(u, a) do {                      \
  97         (a)[0] = (uint32_t)(u).bits.manl;               \
  98         (a)[1] = (uint32_t)(u).bits.manh;               \
  99 } while(0)
 100
 101 #else
 102 #error unsupported architecture
 103 #endif