| /* SPDX-License-Identifier: GPL-2.0-or-later */ | |
| /* | |
| * Linux/PA-RISC Project (http://www.parisc-linux.org/) | |
| * | |
| * Floating-point emulation code | |
| * Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org> | |
| */ | |
| #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)) |