pcsx2/common/include/Utilities/MemsetFast.inl

/*  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/>.
 */

#pragma once

#include <xmmintrin.h>

#define StoreDestIdx(idx) case idx: _mm_store_ps(&destxmm[idx-1][0], srcreg)
 
 template< u8 data >
__noinline void memset_sse_a( void* dest, const size_t size )
{
	const uint MZFqwc = size / 16;

	pxAssert( (size & 0xf) == 0 );

	__m128 srcreg;

	if (data != 0)
	{
		static __aligned16 const u8 loadval[8] = { data,data,data,data,data,data,data,data };
		srcreg = _mm_loadh_pi( _mm_load_ps( (float*)loadval ), (__m64*)loadval );
	}
	else
		srcreg = _mm_setzero_ps();

	float (*destxmm)[4] = (float(*)[4])dest;

	switch( MZFqwc & 0x07 )
	{
		StoreDestIdx(0x07);
		StoreDestIdx(0x06);
		StoreDestIdx(0x05);
		StoreDestIdx(0x04);
		StoreDestIdx(0x03);
		StoreDestIdx(0x02);
		StoreDestIdx(0x01);
	}

	destxmm += (MZFqwc & 0x07);
	for( uint i=0; i<MZFqwc / 8; ++i, destxmm+=8 )
	{
		_mm_store_ps(&destxmm[0][0], srcreg);
		_mm_store_ps(&destxmm[1][0], srcreg);
		_mm_store_ps(&destxmm[2][0], srcreg);
		_mm_store_ps(&destxmm[3][0], srcreg);
		_mm_store_ps(&destxmm[4][0], srcreg);
		_mm_store_ps(&destxmm[5][0], srcreg);
		_mm_store_ps(&destxmm[6][0], srcreg);
		_mm_store_ps(&destxmm[7][0], srcreg);
	}
};

static __fi void memzero_sse_a( void* dest, const size_t size )
{
	memset_sse_a<0>( dest, size );
}

#undef StoreDestIdx

template< u8 data, typename T >
__noinline void memset_sse_a( T& dest )
{
	C_ASSERT( (sizeof(dest) & 0xf) == 0 );
	memset_sse_a<data>( &dest, sizeof(dest) );
}

template< typename T >
void memzero_sse_a( T& dest )
{
	C_ASSERT( (sizeof(dest) & 0xf) == 0 );
	memset_sse_a<0>( &dest, sizeof(dest) );
}