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