1 /* $NetBSD: vaxfp.h,v 1.4 2004/03/18 13:59:14 kleink Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Klaus Klein. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * vaxfp.h defines the layout of VAX Floating-Point data types. 41 * Only F_floating and D_floating types are defined here; 42 * G_floating and H_floating are not supported by NetBSD. 43 */ 44 #ifndef _VAX_VAXFP_H_ 45 #define _VAX_VAXFP_H_ 46 47 #define FFLT_EXPBITS 8 48 #define FFLT_FRACBITS 23 49 50 #define DFLT_EXPBITS 8 51 #define DFLT_FRACBITS 55 52 53 struct vax_f_floating { 54 unsigned int fflt_frach:7; 55 unsigned int fflt_exp:8; 56 unsigned int fflt_sign:1; 57 unsigned int fflt_fracl:16; 58 }; 59 60 struct vax_d_floating { 61 unsigned int dflt_frach:7; 62 unsigned int dflt_exp:8; 63 unsigned int dflt_sign:1; 64 unsigned int dflt_fracm:16; 65 unsigned int dflt_fracl; 66 }; 67 68 /* 69 * Exponent biases. 70 */ 71 #define FFLT_EXP_BIAS 128 72 #define DFLT_EXP_BIAS 128 73 74 /* 75 * Convenience data structures. 76 */ 77 union vax_ffloating_u { 78 float ffltu_f; 79 struct vax_f_floating ffltu_fflt; 80 }; 81 82 union vax_dfloating_u { 83 double dfltu_d; 84 struct vax_d_floating dfltu_dflt; 85 }; 86 87 #endif /* _VAX_VAXFP_H_ */ 88