84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/* $NetBSD: vaxfp.h,v 1.2 2003/10/30 12:05:41 kleink Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2003 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Klaus Klein.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* vaxfp.h defines the layout of VAX Floating-Point data types.
|
|
* Only F_floating and D_floating types are defined here;
|
|
* G_floating and H_floating are not supported by NetBSD.
|
|
*/
|
|
|
|
#define FFLT_EXPBITS 8
|
|
#define FFLT_FRACBITS 23
|
|
|
|
#define DFLT_EXPBITS 8
|
|
#define DFLT_FRACBITS 55
|
|
|
|
struct vax_f_floating {
|
|
u_int fflt_frach:7;
|
|
u_int fflt_exp:8;
|
|
u_int fflt_sign:1;
|
|
u_int fflt_fracl:16;
|
|
};
|
|
|
|
struct vax_d_floating {
|
|
u_int dflt_frach:7;
|
|
u_int dflt_exp:8;
|
|
u_int dflt_sign:1;
|
|
u_int dflt_fracm:16;
|
|
u_int dflt_fracl;
|
|
};
|
|
|
|
/*
|
|
* Exponent biases.
|
|
*/
|
|
#define FFLT_EXP_BIAS 128
|
|
#define DFLT_EXP_BIAS 128
|
|
|
|
/*
|
|
* Convenience data structures.
|
|
*/
|
|
union vax_ffloating_u {
|
|
float ffltu_f;
|
|
struct vax_f_floating ffltu_fflt;
|
|
};
|
|
|
|
union vax_dfloating_u {
|
|
double dfltu_d;
|
|
struct vax_d_floating dfltu_dflt;
|
|
;}
|