mirror of https://github.com/PCSX2/pcsx2.git
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2010 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the 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 along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _LNX_MEMZERO_H_
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#define _LNX_MEMZERO_H_
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// This header contains non-optimized implementation of memzero_ptr and memset8, etc
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template< u32 data, typename T >
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static __fi void memset32( T& obj )
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{
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// this function works on 32-bit aligned lengths of data only.
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// If the data length is not a factor of 32 bits, the C++ optimizing compiler will
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// probably just generate mysteriously broken code in Release builds. ;)
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pxAssume((sizeof(T) & 0x3) == 0);
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u32* dest = (u32*)&obj;
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for( int i=sizeof(T)>>2; i; --i, ++dest )
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*dest = data;
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}
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template< typename T >
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static __fi void memzero( T& obj )
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{
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memset( &obj, 0, sizeof( T ) );
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}
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template< u8 data, typename T >
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static __fi void memset8( T& obj )
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{
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// Aligned sizes use the optimized 32 bit inline memset. Unaligned sizes use memset.
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if( (sizeof(T) & 0x3) != 0 )
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memset( &obj, data, sizeof( T ) );
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else {
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const u32 data32 = data + (data<<8) + (data<<16) + (data<<24);
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memset32<data32>( obj );
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}
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}
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// Code is only called in the init so no need to bother with ASM
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template< u8 data, size_t bytes >
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static __fi void memset_8( void *dest )
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{
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memset(dest, data, bytes);
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}
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#endif
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