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/* -*- mode: C++; tab-width: 4 -*- */
/* ===================================================================== *\
Copyright (c) 1998-2001 Palm, Inc. or its subsidiaries.
All rights reserved.
This file is part of the Palm OS Emulator.
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 of the License, or
(at your option) any later version.
\* ===================================================================== */
#ifndef _BYTESWAPPING_H_
#define _BYTESWAPPING_H_
#if !defined (BYTESWAP)
#error "Must define BYTESWAP"
#endif
struct regstruct;
/*
** --------------------------------------------------------------------------------
** Byte swapping
** --------------------------------------------------------------------------------
*/
#define BYTE_SWAP_16(n) ((((uint16) n) >> 8) | \
(((uint16) n) << 8))
#define BYTE_SWAP_32(n) ( (((uint32) n) << 24) | \
((((uint32) n) << 8) & 0x00FF0000) | \
((((uint32) n) >> 8) & 0x0000FF00) | \
(((uint32) n) >> 24))
#ifdef _MSC_VER
#define BYTE_SWAP_64(n) ( (((uint64) n) << 56) | \
((((uint64) n) << 40) & 0x00FF000000000000i64) | \
((((uint64) n) << 24) & 0x0000FF0000000000i64) | \
((((uint64) n) << 8) & 0x000000FF00000000i64) | \
((((uint64) n) >> 8) & 0x00000000FF000000i64) | \
((((uint64) n) >> 24) & 0x0000000000FF0000i64) | \
((((uint64) n) >> 40) & 0x000000000000FF00i64) | \
(((uint64) n) >> 56))
#else
#define BYTE_SWAP_64(n) ( (((uint64) n) << 56) | \
((((uint64) n) << 40) & 0x00FF000000000000LL) | \
((((uint64) n) << 24) & 0x0000FF0000000000LL) | \
((((uint64) n) << 8) & 0x000000FF00000000LL) | \
((((uint64) n) >> 8) & 0x00000000FF000000LL) | \
((((uint64) n) >> 24) & 0x0000000000FF0000LL) | \
((((uint64) n) >> 40) & 0x000000000000FF00LL) | \
(((uint64) n) >> 56))
#endif
inline void Byteswap(bool&)
{
}
inline void Byteswap(char&)
{
}
inline void Byteswap(signed char&)
{
}
inline void Byteswap(unsigned char&)
{
}
inline void Byteswap(short& v)
{
v = (short) BYTE_SWAP_16(v);
}
inline void Byteswap(unsigned short& v)
{
v = (unsigned short) BYTE_SWAP_16(v);
}
inline void Byteswap(int& v)
{
if (sizeof(int) == 4)
v = (int) BYTE_SWAP_32(v);
else if (sizeof(int) == 2)
v = (int) BYTE_SWAP_16(v);
}
inline void Byteswap(unsigned int& v)
{
if (sizeof(unsigned int) == 4)
v = (unsigned int) BYTE_SWAP_32(v);
else if (sizeof(unsigned int) == 2)
v = (unsigned int) BYTE_SWAP_16(v);
}
inline void Byteswap(long& v)
{
v = (long) BYTE_SWAP_32(v);
}
inline void Byteswap(unsigned long& v)
{
v = (unsigned long) BYTE_SWAP_32(v);
}
inline void Byteswap(int64& v)
{
v = (int64) BYTE_SWAP_64(v);
}
inline void Byteswap(uint64& v)
{
v = (uint64) BYTE_SWAP_64(v);
}
template <class T>
inline void Byteswap(T*& v)
{
Byteswap ((uint32&) v);
}
void Byteswap (HwrM68328Type&);
void Byteswap (HwrM68EZ328Type&);
void Byteswap (HwrM68VZ328Type&);
void Byteswap (regstruct& r);
void Byteswap (SED1375RegsType& p);
#if BYTESWAP
template <class T>
inline void Canonical(T& v)
{
Byteswap (v);
}
#else
template <class T>
inline void Canonical(T&)
{
}
#endif
#if WORDSWAP_MEMORY
inline void ByteswapWords (void* start, unsigned long length)
{
for (unsigned long ii = 0; ii < length / 2; ++ii)
{
unsigned short* p = ((unsigned short*) start) + ii;
unsigned char* bp = (unsigned char*) p;
*p = (((unsigned short) *bp) << 8) | (unsigned short) (*(bp + 1));
}
}
#else
inline void ByteswapWords (void*, unsigned long)
{
}
#endif // WORDSWAP_MEMORY
#endif /* _BYTESWAPPING_H_ */
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