1 /* $NetBSD: vaxfp.h,v 1.7 2008/04/28 20:23:39 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * vaxfp.h defines the layout of VAX Floating-Point data types. 34 * Only F_floating and D_floating types are defined here; 35 * G_floating and H_floating are not supported by NetBSD. 36 */ 37 #ifndef _VAX_VAXFP_H_ 38 #define _VAX_VAXFP_H_ 39 40 41 #define FFLT_EXPBITS 8 42 #define FFLT_FRACHBITS 7 43 #define FFLT_FRACLBITS 16 44 #define FFLT_FRACBITS (FFLT_FRACLBITS + FFLT_FRACHBITS) 45 46 struct vax_f_floating { 47 unsigned int fflt_frach:FFLT_FRACHBITS; 48 unsigned int fflt_exp:FFLT_EXPBITS; 49 unsigned int fflt_sign:1; 50 unsigned int fflt_fracl:FFLT_FRACLBITS; 51 }; 52 53 #define DFLT_EXPBITS 8 54 #define DFLT_FRACHBITS 7 55 #define DFLT_FRACMBITS 16 56 #define DFLT_FRACLBITS 32 57 #define DFLT_FRACBITS (DFLT_FRACLBITS + DFLT_FRACMBITS + DFLT_FRACHBITS) 58 59 struct vax_d_floating { 60 61 unsigned int dflt_frach:DFLT_FRACHBITS; 62 unsigned int dflt_exp:DFLT_EXPBITS; 63 unsigned int dflt_sign:1; 64 unsigned int dflt_fracm:DFLT_FRACMBITS; 65 unsigned int dflt_fracl:DFLT_FRACLBITS; 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