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52 lines
2.1 KiB
52 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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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) <[email protected]> |
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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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