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 /* TODO andrew: Check the packing here */ 39 struct { 40 unsigned long manl :64; 41 unsigned long manh :48; 42 unsigned int expsign :16; 43 } xbits; 44 }; 45 46 #define LDBL_NBIT 0 47 #define LDBL_IMPLICIT_NBIT 48 #define mask_nbit_l(u) ((void)0) 49 50 #define LDBL_MANH_SIZE 48 51 #define LDBL_MANL_SIZE 64 52 53 #define LDBL_TO_ARRAY32(u, a) do { \ 54 (a)[0] = (uint32_t)(u).bits.manl; \ 55 (a)[1] = (uint32_t)((u).bits.manl >> 32); \ 56 (a)[2] = (uint32_t)(u).bits.manh; \ 57 (a)[3] = (uint32_t)((u).bits.manh >> 32); \ 58 } while(0) 59