2 * Linux/PA-RISC Project (http://www.parisc-linux.org/)
4 * Floating-point emulation code
5 * Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 PA header file -- do not include this header file for non-PA builds.
28 * These macros are designed to be portable to all machines that have
29 * a wordsize greater than or equal to 32 bits that support the portable
30 * C compiler and the standard C preprocessor. Wordsize (default 32)
31 * and bitfield assignment (default left-to-right, unlike VAX, PDP-11)
32 * should be predefined using the constants HOSTWDSZ and BITFRL and
33 * the C compiler "-D" flag (e.g., -DHOSTWDSZ=36 -DBITFLR for the DEC-20).
34 * Note that the macro arguments assume that the integer being referenced
35 * is a 32-bit integer (right-justified on the 20) and that bit 0 is the
36 * most significant bit.
44 /*########################### Macros ######################################*/
46 /*-------------------------------------------------------------------------
47 * NewDeclareBitField_Reference - Declare a structure similar to the simulator
48 * function "DeclBitfR" except its use is restricted to occur within a larger
49 * enclosing structure or union definition. This declaration is an unnamed
50 * structure with the argument, name, as the member name and the argument,
51 * uname, as the element name.
52 *----------------------------------------------------------------------- */
53 #define Bitfield_extract(start, length, object) \
54 ((object) >> (HOSTWDSZ - (start) - (length)) & \
55 ((unsigned)-1 >> (HOSTWDSZ - (length))))
57 #define Bitfield_signed_extract(start, length, object) \
58 ((int)((object) << start) >> (HOSTWDSZ - (length)))
60 #define Bitfield_mask(start, len, object) \
61 ((object) & (((unsigned)-1 >> (HOSTWDSZ-len)) << (HOSTWDSZ-start-len)))
63 #define Bitfield_deposit(value,start,len,object) object = \
64 ((object) & ~(((unsigned)-1 >> (HOSTWDSZ-len)) << (HOSTWDSZ-start-len))) | \
65 (((value) & ((unsigned)-1 >> (HOSTWDSZ-len))) << (HOSTWDSZ-start-len))