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swap.c
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swap.c
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////////////////////////////////////////////////////////////////////////////////
// swap.c //
// Endianness swap functions //
// //
// Copyright 2012- Christian Vogelgsang, A.M. Robinson, Rok Krajnc //
// //
// This file is part of Minimig //
// //
// Minimig 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. //
// //
// Minimig 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, see <http://www.gnu.org/licenses/>. //
// //
////////////////////////////////////////////////////////////////////////////////
// Changelog //
// //
// 2012-08-02 - [email protected] //
// Functions are now generic - removed assembler code. Added function-like //
// macros (gcc specific!). //
// //
////////////////////////////////////////////////////////////////////////////////
#include "swap.h"
#ifndef SWAP_MACROS
uint32_t SwapBBBB(uint32_t i)
{
return ((i&0x00ff0000)>>8) | ((i&0xff000000)>>24) | ((i&0x000000ff)<<24) | ((i&0x0000ff00)<<8);
}
uint16_t SwapBB(uint16_t i)
{
return ((i&0x00ff)<<8) | ((i&0xff00)>>8);
}
uint32_t SwapWW(uint32_t i)
{
//return ((i&0x0000ffff)<<16) | ((i&0xffff0000)>>16);
return ((i<<16) | (i>>16));
}
#endif // SWAP_MACROS