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_FRACBITS 112 56 57 struct ieee_ext { 58 u_int ext_sign:1; 59 u_int ext_exp:15; 60 u_int ext_frach:16; 61 u_int ext_frachm; 62 u_int ext_fraclm; 63 u_int ext_fracl; 64 }; 65 66 /* 67 * Floats whose exponent is in [1..INFNAN) (of whatever type) are 68 * `normal'. Floats whose exponent is INFNAN are either Inf or NaN. 69 * Floats whose exponent is zero are either zero (iff all fraction 70 * bits are zero) or subnormal values. 71 * 72 * A NaN is a `signalling NaN' if its QUIETNAN bit is set in its 73 * high fraction; if the bit is clear, it is a `quiet NaN'. 74 */ 75 #define EXT_EXP_INFNAN 32767 76 77 #if 0 78 #define SNG_QUIETNAN (1 << 22) 79 #define DBL_QUIETNAN (1 << 19) 80 #define EXT_QUIETNAN (1 << 15) 81 #endif 82 83 /* 84 * Exponent biases. 85 */ 86 #define EXT_EXP_BIAS 16383 87 88 /* 89 * Convenience data structures. 90 */ 91 union ieee_ext_u { 92 long double extu_ld; 93 struct ieee_ext extu_ext; 94 }; 95 #endif /* _LP64 */ 96