1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Linux/PA-RISC Project (http://www.parisc-linux.org/)
4 *
5 * Floating-point emulation code
6 *  Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
7 */
8
9#ifdef __NO_PA_HDRS
10    PA header file -- do not include this header file for non-PA builds.
11#endif
12
13
14/*
15 *  These macros are designed to be portable to all machines that have
16 *  a wordsize greater than or equal to 32 bits that support the portable
17 *  C compiler and the standard C preprocessor.  Wordsize (default 32)
18 *  and bitfield assignment (default left-to-right,  unlike VAX, PDP-11)
19 *  should be predefined using the constants HOSTWDSZ and BITFRL and
20 *  the C compiler "-D" flag (e.g., -DHOSTWDSZ=36 -DBITFLR for the DEC-20).
21 *  Note that the macro arguments assume that the integer being referenced
22 *  is a 32-bit integer (right-justified on the 20) and that bit 0 is the
23 *  most significant bit.
24 */
25
26#ifndef HOSTWDSZ
27#define	HOSTWDSZ	32
28#endif
29
30
31/*###########################  Macros  ######################################*/
32
33/*-------------------------------------------------------------------------
34 * NewDeclareBitField_Reference - Declare a structure similar to the simulator
35 * function "DeclBitfR" except its use is restricted to occur within a larger
36 * enclosing structure or union definition.  This declaration is an unnamed
37 * structure with the argument, name, as the member name and the argument,
38 * uname, as the element name.
39 *----------------------------------------------------------------------- */
40#define Bitfield_extract(start, length, object) 	\
41    ((object) >> (HOSTWDSZ - (start) - (length)) & 	\
42    ((unsigned)-1 >> (HOSTWDSZ - (length))))
43
44#define Bitfield_signed_extract(start, length, object) \
45    ((int)((object) << start) >> (HOSTWDSZ - (length)))
46
47#define Bitfield_mask(start, len, object)		\
48    ((object) & (((unsigned)-1 >> (HOSTWDSZ-len)) << (HOSTWDSZ-start-len)))
49
50#define Bitfield_deposit(value,start,len,object)  object = \
51    ((object) & ~(((unsigned)-1 >> (HOSTWDSZ-len)) << (HOSTWDSZ-start-len))) | \
52    (((value) & ((unsigned)-1 >> (HOSTWDSZ-len))) << (HOSTWDSZ-start-len))
53