pcsx2/common/include/Utilities/lnx_memzero.h

61 lines
1.8 KiB
C++

/* PCSX2 - PS2 Emulator for PCs
* Copyright (C) 2002-2010 PCSX2 Dev Team
*
* PCSX2 is free software: you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* PCSX2 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 PCSX2.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _LNX_MEMZERO_H_
#define _LNX_MEMZERO_H_
// This header contains non-optimized implementation of memzero_ptr and memset8, etc
template< u32 data, typename T >
static __fi void memset32( T& obj )
{
// this function works on 32-bit aligned lengths of data only.
// If the data length is not a factor of 32 bits, the C++ optimizing compiler will
// probably just generate mysteriously broken code in Release builds. ;)
jASSUME( (sizeof(T) & 0x3) == 0 );
u32* dest = (u32*)&obj;
for( int i=sizeof(T)>>2; i; --i, ++dest )
*dest = data;
}
template< typename T >
static __fi void memzero( T& obj )
{
memset( &obj, 0, sizeof( T ) );
}
template< u8 data, typename T >
static __fi void memset8( T& obj )
{
// Aligned sizes use the optimized 32 bit inline memset. Unaligned sizes use memset.
if( (sizeof(T) & 0x3) != 0 )
memset( &obj, data, sizeof( T ) );
else {
const u32 data32 = data + (data<<8) + (data<<16) + (data<<24);
memset32<data32>( obj );
}
}
// Code is only called in the init so no need to bother with ASM
template< u8 data, size_t bytes >
static __fi void memset_8( void *dest )
{
memset(dest, data, bytes);
}
#endif