1 /* $NetBSD: ieee.h,v 1.8 2003/10/28 15:55:09 kleink Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)ieee.h 8.1 (Berkeley) 6/11/93 41 */ 42 43 /* 44 * ieee.h defines the machine-dependent layout of the machine's IEEE 45 * floating point. It does *not* define (yet?) any of the rounding 46 * mode bits, exceptions, and so forth. 47 */ 48 49 #include <sys/ieee754.h> 50 51 /* 52 * The SPARC architecture defines the following IEEE 754 compliant 53 * 128-bit extended-precision format, which is supported only by the 54 * v9 toolchain. 55 */ 56 57 #if defined(__arch64__) || defined(_KERNEL) 58 #define EXT_EXPBITS 15 59 #define EXT_FRACBITS 112 60 61 struct ieee_ext { 62 u_int ext_sign:1; 63 u_int ext_exp:15; 64 u_int ext_frach:16; 65 u_int ext_frachm; 66 u_int ext_fraclm; 67 u_int ext_fracl; 68 }; 69 70 /* 71 * Floats whose exponent is in [1..INFNAN) (of whatever type) are 72 * `normal'. Floats whose exponent is INFNAN are either Inf or NaN. 73 * Floats whose exponent is zero are either zero (iff all fraction 74 * bits are zero) or subnormal values. 75 * 76 * A NaN is a `signalling NaN' if its QUIETNAN bit is clear in its 77 * high fraction; if the bit is set, it is a `quiet NaN'. 78 */ 79 #define EXT_EXP_INFNAN 32767 80 81 #if 0 82 #define EXT_QUIETNAN (1 << 15) 83 #endif 84 85 /* 86 * Exponent biases. 87 */ 88 #define EXT_EXP_BIAS 16383 89 90 /* 91 * Convenience data structures. 92 */ 93 union ieee_ext_u { 94 long double extu_ld; 95 struct ieee_ext extu_ext; 96 }; 97 #endif /* __arch64__ || _KERNEL */ 98