1 /* $OpenBSD: ieee.h,v 1.4 2011/11/08 17:06:51 deraadt Exp $ */ 2 /* $NetBSD: ieee.h,v 1.2 2001/02/21 17:43:50 bjh21 Exp $ */ 3 4 /* 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This software was developed by the Computer Systems Engineering group 9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 10 * contributed to Berkeley. 11 * 12 * All advertising materials mentioning features or use of this software 13 * must display the following acknowledgement: 14 * This product includes software developed by the University of 15 * California, Lawrence Berkeley Laboratory. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 3. All advertising materials mentioning features or use of this software 26 * must display the following acknowledgement: 27 * This product includes software developed by the University of 28 * California, Berkeley and its contributors. 29 * 4. Neither the name of the University nor the names of its contributors 30 * may be used to endorse or promote products derived from this software 31 * without specific prior written permission. 32 * 33 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 36 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 43 * SUCH DAMAGE. 44 * 45 * @(#)ieee.h 8.1 (Berkeley) 6/11/93 46 */ 47 48 #ifndef _MACHINE_IEEE_H_ 49 #define _MACHINE_IEEE_H_ 50 51 #include <sys/types.h> 52 53 __BEGIN_DECLS 54 55 #define SNG_EXPBITS 8 56 #define SNG_FRACBITS 23 57 58 #define SNG_EXP_INFNAN 255 59 #define SNG_EXP_BIAS 127 60 61 struct ieee_single { 62 unsigned sng_frac:23; 63 unsigned sng_exp:8; 64 unsigned sng_sign:1; 65 }; 66 67 #define DBL_EXPBITS 11 68 #define DBL_FRACHBITS 20 69 #define DBL_FRACLBITS 32 70 #define DBL_FRACBITS 52 71 72 #define DBL_EXP_INFNAN 2047 73 #define DBL_EXP_BIAS 1023 74 75 struct ieee_double { 76 unsigned dbl_fracl; 77 unsigned dbl_frach:20; 78 unsigned dbl_exp:11; 79 unsigned dbl_sign:1; 80 }; 81 82 #if defined(__LP64__) 83 84 /* 64-bit Android uses ld128 long doubles. */ 85 86 #define EXT_EXPBITS 15 87 #define EXT_FRACHBITS 16 88 #define EXT_FRACHMBITS 32 89 #define EXT_FRACLMBITS 32 90 #define EXT_FRACLBITS 32 91 #define EXT_FRACBITS 112 92 93 #define EXT_EXP_INFNAN 32767 94 #define EXT_EXP_BIAS 16383 95 96 #define EXT_IMPLICIT_NBIT 97 98 #define EXT_TO_ARRAY32(p, a) do { \ 99 (a)[0] = (uint32_t)(p)->ext_fracl; \ 100 (a)[1] = (uint32_t)(p)->ext_fraclm; \ 101 (a)[2] = (uint32_t)(p)->ext_frachm; \ 102 (a)[3] = (uint32_t)(p)->ext_frach; \ 103 } while(0) 104 105 struct ieee_ext { 106 unsigned ext_fracl; 107 unsigned ext_fraclm; 108 unsigned ext_frachm; 109 unsigned ext_frach:16; 110 unsigned ext_exp:15; 111 unsigned ext_sign:1; 112 }; 113 114 #endif 115 116 __END_DECLS 117 118 #endif /* _MACHINE_IEEE_H_ */ 119