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/* $OpenBSD: fpbits.h,v 1.3 1998/07/02 19:05:28 mickey Exp $ */
/*
* Copyright 1996 1995 by Open Software Foundation, Inc.
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation.
*
* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* pmk1.1
*/
/*
* (c) Copyright 1986 HEWLETT-PACKARD COMPANY
*
* To anyone who acknowledges that this file is provided "AS IS"
* without any express or implied warranty:
* permission to use, copy, modify, and distribute this file
* for any purpose is hereby granted without fee, provided that
* the above copyright notice and this notice appears in all
* copies, and that the name of Hewlett-Packard Company not be
* used in advertising or publicity pertaining to distribution
* of the software without specific, written prior permission.
* Hewlett-Packard Company makes no representations about the
* suitability of this software for any purpose.
*/
/*
* These macros are designed to be portable to all machines that have
* a wordsize greater than or equal to 32 bits that support the portable
* C compiler and the standard C preprocessor. Wordsize (default 32)
* and bitfield assignment (default left-to-right, unlike VAX, PDP-11)
* should be predefined using the constants HOSTWDSZ and BITFRL and
* the C compiler "-D" flag (e.g., -DHOSTWDSZ=36 -DBITFLR for the DEC-20).
* Note that the macro arguments assume that the integer being referenced
* is a 32-bit integer (right-justified on the 20) and that bit 0 is the
* most significant bit.
*/
#ifndef HOSTWDSZ
#define HOSTWDSZ 32
#endif
/*########################### Macros ######################################*/
/*-------------------------------------------------------------------------
* NewDeclareBitField_Reference - Declare a structure similar to the simulator
* function "DeclBitfR" except its use is restricted to occur within a larger
* enclosing structure or union definition. This declaration is an unnamed
* structure with the argument, name, as the member name and the argument,
* uname, as the element name.
*----------------------------------------------------------------------- */
#define Bitfield_extract(start, length, object) \
((object) >> (HOSTWDSZ - (start) - (length)) & \
((unsigned)-1 >> (HOSTWDSZ - (length))))
#define Bitfield_signed_extract(start, length, object) \
((int)((object) << start) >> (HOSTWDSZ - (length)))
#define Bitfield_mask(start, len, object) \
((object) & (((unsigned)-1 >> (HOSTWDSZ-len)) << (HOSTWDSZ-start-len)))
#define Bitfield_deposit(value,start,len,object) object = \
((object) & ~(((unsigned)-1 >> (HOSTWDSZ-(len))) << (HOSTWDSZ-(start)-(len)))) | \
(((value) & ((unsigned)-1 >> (HOSTWDSZ-(len)))) << (HOSTWDSZ-(start)-(len)))
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