1 /* $NetBSD: vaxfp.h,v 1.8 2008/08/05 16:47:42 matt 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 #include <sys/featuretest.h> 41 42 #if defined(_NETBSD_SOURCE) || defined(_ISOC99_SOURCE) 43 44 typedef int fenv_t; 45 typedef int fexcept_t; 46 47 #define FE_UNDERFLOW 0x01 /* underflow exception */ 48 49 #define FE_ALL_EXCEPT 0x01 50 51 #if !defined(_ISOC99_SOURCE) 52 53 #define FFLT_EXPBITS 8 54 #define FFLT_FRACHBITS 7 55 #define FFLT_FRACLBITS 16 56 #define FFLT_FRACBITS (FFLT_FRACLBITS + FFLT_FRACHBITS) 57 58 struct vax_f_floating { 59 unsigned int fflt_frach:FFLT_FRACHBITS; 60 unsigned int fflt_exp:FFLT_EXPBITS; 61 unsigned int fflt_sign:1; 62 unsigned int fflt_fracl:FFLT_FRACLBITS; 63 }; 64 65 #define DFLT_EXPBITS 8 66 #define DFLT_FRACHBITS 7 67 #define DFLT_FRACMBITS 16 68 #define DFLT_FRACLBITS 32 69 #define DFLT_FRACBITS (DFLT_FRACLBITS + DFLT_FRACMBITS + DFLT_FRACHBITS) 70 71 struct vax_d_floating { 72 73 unsigned int dflt_frach:DFLT_FRACHBITS; 74 unsigned int dflt_exp:DFLT_EXPBITS; 75 unsigned int dflt_sign:1; 76 unsigned int dflt_fracm:DFLT_FRACMBITS; 77 unsigned int dflt_fracl:DFLT_FRACLBITS; 78 }; 79 80 /* 81 * Exponent biases. 82 */ 83 #define FFLT_EXP_BIAS 128 84 #define DFLT_EXP_BIAS 128 85 86 /* 87 * Convenience data structures. 88 */ 89 union vax_ffloating_u { 90 float ffltu_f; 91 struct vax_f_floating ffltu_fflt; 92 }; 93 94 union vax_dfloating_u { 95 double dfltu_d; 96 struct vax_d_floating dfltu_dflt; 97 }; 98 99 #endif /* !_ISOC99_SOURCE */ 100 101 #endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */ 102 103 #endif /* _VAX_VAXFP_H_ */ 104