projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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)) |