compiler/stdc/math/aarch64/_fpmath.h

   1 /*-
   2  * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
   3  * Copyright (2) 2014 The FreeBSD Foundation
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  * $FreeBSD: head/lib/libc/aarch64/_fpmath.h 281197 2015-04-07 09:52:14Z andrew $
  28  */
  29
  30 union IEEEl2bits {
  31         long double     e;
  32         struct {
  33                 unsigned long   manl    :64;
  34                 unsigned long   manh    :48;
  35                 unsigned int    exp     :15;
  36                 unsigned int    sign    :1;
  37         } bits;
  38         struct {
  39                 unsigned long   manl    :64;
  40                 unsigned long   manh    :48;
  41                 unsigned int    expsign :16;
  42         } xbits;
  43 };
  44
  45 #define LDBL_NBIT       0
  46 #define LDBL_IMPLICIT_NBIT
  47 #define mask_nbit_l(u)  ((void)0)
  48
  49 #define LDBL_MANH_SIZE  48
  50 #define LDBL_MANL_SIZE  64
  51
  52 #define LDBL_TO_ARRAY32(u, a) do {                      \
  53         (a)[0] = (uint32_t)(u).bits.manl;               \
  54         (a)[1] = (uint32_t)((u).bits.manl >> 32);       \
  55         (a)[2] = (uint32_t)(u).bits.manh;               \
  56         (a)[3] = (uint32_t)((u).bits.manh >> 32);       \
  57 } while(0)