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      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