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/arch/parisc/math-emu/fpbits.h

https://github.com/aicjofs/android_kernel_lge_v500_20d_f2fs
C Header | 65 lines | 16 code | 10 blank | 39 comment | 1 complexity | ea8e79c513738baa9b193a2b35940439 MD5 | raw file
 1/*
 2 * Linux/PA-RISC Project (http://www.parisc-linux.org/)
 3 *
 4 * Floating-point emulation code
 5 *  Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
 6 *
 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)
10 *    any later version.
11 *
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.
16 *
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
20 */
21
22#ifdef __NO_PA_HDRS
23    PA header file -- do not include this header file for non-PA builds.
24#endif
25
26
27/*
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.
37 */
38
39#ifndef HOSTWDSZ
40#define	HOSTWDSZ	32
41#endif
42
43
44/*###########################  Macros  ######################################*/
45
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))))
56
57#define Bitfield_signed_extract(start, length, object) \
58    ((int)((object) << start) >> (HOSTWDSZ - (length)))
59
60#define Bitfield_mask(start, len, object)		\
61    ((object) & (((unsigned)-1 >> (HOSTWDSZ-len)) << (HOSTWDSZ-start-len)))
62
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))