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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/parisc/math-emu/fpbits.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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diff --git a/arch/parisc/math-emu/fpbits.h b/arch/parisc/math-emu/fpbits.h
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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))