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