1 /* $NetBSD: vaxfp.h,v 1.6 2007/02/26 01:32:29 christos 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 48 #define FFLT_EXPBITS 8 49 #define FFLT_FRACHBITS 7 50 #define FFLT_FRACLBITS 16 51 #define FFLT_FRACBITS (FFLT_FRACLBITS + FFLT_FRACHBITS) 52 53 struct vax_f_floating { 54 unsigned int fflt_frach:FFLT_FRACHBITS; 55 unsigned int fflt_exp:FFLT_EXPBITS; 56 unsigned int fflt_sign:1; 57 unsigned int fflt_fracl:FFLT_FRACLBITS; 58 }; 59 60 #define DFLT_EXPBITS 8 61 #define DFLT_FRACHBITS 7 62 #define DFLT_FRACMBITS 16 63 #define DFLT_FRACLBITS 32 64 #define DFLT_FRACBITS (DFLT_FRACLBITS + DFLT_FRACMBITS + DFLT_FRACHBITS) 65 66 struct vax_d_floating { 67 68 unsigned int dflt_frach:DFLT_FRACHBITS; 69 unsigned int dflt_exp:DFLT_EXPBITS; 70 unsigned int dflt_sign:1; 71 unsigned int dflt_fracm:DFLT_FRACMBITS; 72 unsigned int dflt_fracl:DFLT_FRACLBITS; 73 }; 74 75 /* 76 * Exponent biases. 77 */ 78 #define FFLT_EXP_BIAS 128 79 #define DFLT_EXP_BIAS 128 80 81 /* 82 * Convenience data structures. 83 */ 84 union vax_ffloating_u { 85 float ffltu_f; 86 struct vax_f_floating ffltu_fflt; 87 }; 88 89 union vax_dfloating_u { 90 double dfltu_d; 91 struct vax_d_floating dfltu_dflt; 92 }; 93 94 #endif /* _VAX_VAXFP_H_ */ 95