1 /*- 2 * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org> 3 * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG> 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: src/lib/libc/ia64/_fpmath.h,v 1.6 2005/03/07 04:55:40 das Exp $ 28 */ 29 30 #include <sys/endian.h> 31 32 union IEEEl2bits { 33 long double e; 34 struct { 35 #if _BYTE_ORDER == _LITTLE_ENDIAN 36 unsigned int manl :32; 37 unsigned int manh :32; 38 unsigned int exp :15; 39 unsigned int sign :1; 40 unsigned long junk :48; 41 #else /* _BIG_ENDIAN */ 42 unsigned long junk :48; 43 unsigned int sign :1; 44 unsigned int exp :15; 45 unsigned int manh :32; 46 unsigned int manl :32; 47 #endif 48 } bits; 49 }; 50 51 #if _BYTE_ORDER == _LITTLE_ENDIAN 52 #define LDBL_NBIT 0x80000000 53 #define mask_nbit_l(u) ((u).bits.manh &= ~LDBL_NBIT) 54 #else /* _BIG_ENDIAN */ 55 /* 56 * XXX This doesn't look right. Very few machines have a different 57 * endianness for integers and floating-point, and in nextafterl() 58 * we assume that none do. If you have an environment for testing 59 * this, please let me know. --das 60 */ 61 #define LDBL_NBIT 0x80 62 #define mask_nbit_l(u) ((u).bits.manh &= ~LDBL_NBIT) 63 #endif 64 65 #define LDBL_MANH_SIZE 32 66 #define LDBL_MANL_SIZE 32 67 68 #define LDBL_TO_ARRAY32(u, a) do { \ 69 (a)[0] = (uint32_t)(u).bits.manl; \ 70 (a)[1] = (uint32_t)(u).bits.manh; \ 71 } while(0) 72