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/*
* Copyright (C) 2010 Thorsten Liebig (Thorsten.Liebig@gmx.de)
*
* 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 3 of the License, or
* (at your option) any later version.
*
* This program 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/>.
*/
#ifndef SSE_CORRECT_DENORMALS
#include <xmmintrin.h>
#endif
#include "engine_sse.h"
//! \brief construct an Engine_sse instance
//! it's the responsibility of the caller to free the returned pointer
Engine_sse* Engine_sse::New(const Operator_sse* op)
{
cout << "Create FDTD engine (SSE)" << endl;
Engine_sse* e = new Engine_sse(op);
e->Init();
return e;
}
Engine_sse::Engine_sse(const Operator_sse* op) : Engine(op)
{
m_type = SSE;
Op = op;
f4_volt = 0;
f4_curr = 0;
numVectors = ceil((double)numLines[2]/4.0);
// speed up the calculation of denormal floating point values (flush-to-zero)
#ifndef SSE_CORRECT_DENORMALS
unsigned int oldMXCSR = _mm_getcsr(); //read the old MXCSR setting
unsigned int newMXCSR = oldMXCSR | 0x8040; // set DAZ and FZ bits
_mm_setcsr( newMXCSR ); //write the new MXCSR setting to the MXCSR
#endif
}
Engine_sse::~Engine_sse()
{
//_mm_setcsr( oldMXCSR ); // restore old setting
Reset();
}
void Engine_sse::Init()
{
Engine::Init();
Delete_N_3DArray(volt,numLines);
volt=NULL; // not used
Delete_N_3DArray(curr,numLines);
curr=NULL; // not used
f4_volt = Create_N_3DArray_v4sf(numLines);
f4_curr = Create_N_3DArray_v4sf(numLines);
}
void Engine_sse::Reset()
{
Engine::Reset();
Delete_N_3DArray_v4sf(f4_volt,numLines);
f4_volt = 0;
Delete_N_3DArray_v4sf(f4_curr,numLines);
f4_curr = 0;
}
void Engine_sse::UpdateVoltages(unsigned int startX, unsigned int numX)
{
unsigned int pos[3];
bool shift[2];
f4vector temp;
pos[0] = startX;
for (unsigned int posX=0; posX<numX; ++posX)
{
shift[0]=pos[0];
for (pos[1]=0; pos[1]<numLines[1]; ++pos[1])
{
shift[1]=pos[1];
for (pos[2]=1; pos[2]<numVectors; ++pos[2])
{
// x-polarization
f4_volt[0][pos[0]][pos[1]][pos[2]].v *= Op->f4_vv[0][pos[0]][pos[1]][pos[2]].v;
f4_volt[0][pos[0]][pos[1]][pos[2]].v += Op->f4_vi[0][pos[0]][pos[1]][pos[2]].v * ( f4_curr[2][pos[0]][pos[1]][pos[2]].v - f4_curr[2][pos[0]][pos[1]-shift[1]][pos[2]].v - f4_curr[1][pos[0]][pos[1]][pos[2]].v + f4_curr[1][pos[0]][pos[1]][pos[2]-1].v );
// y-polarization
f4_volt[1][pos[0]][pos[1]][pos[2]].v *= Op->f4_vv[1][pos[0]][pos[1]][pos[2]].v;
f4_volt[1][pos[0]][pos[1]][pos[2]].v += Op->f4_vi[1][pos[0]][pos[1]][pos[2]].v * ( f4_curr[0][pos[0]][pos[1]][pos[2]].v - f4_curr[0][pos[0]][pos[1]][pos[2]-1].v - f4_curr[2][pos[0]][pos[1]][pos[2]].v + f4_curr[2][pos[0]-shift[0]][pos[1]][pos[2]].v);
// z-polarization
f4_volt[2][pos[0]][pos[1]][pos[2]].v *= Op->f4_vv[2][pos[0]][pos[1]][pos[2]].v;
f4_volt[2][pos[0]][pos[1]][pos[2]].v += Op->f4_vi[2][pos[0]][pos[1]][pos[2]].v * ( f4_curr[1][pos[0]][pos[1]][pos[2]].v - f4_curr[1][pos[0]-shift[0]][pos[1]][pos[2]].v - f4_curr[0][pos[0]][pos[1]][pos[2]].v + f4_curr[0][pos[0]][pos[1]-shift[1]][pos[2]].v);
}
// for pos[2] = 0
// x-polarization
temp.f[0] = 0;
temp.f[1] = f4_curr[1][pos[0]][pos[1]][numVectors-1].f[0];
temp.f[2] = f4_curr[1][pos[0]][pos[1]][numVectors-1].f[1];
temp.f[3] = f4_curr[1][pos[0]][pos[1]][numVectors-1].f[2];
f4_volt[0][pos[0]][pos[1]][0].v *= Op->f4_vv[0][pos[0]][pos[1]][0].v;
f4_volt[0][pos[0]][pos[1]][0].v += Op->f4_vi[0][pos[0]][pos[1]][0].v * ( f4_curr[2][pos[0]][pos[1]][0].v - f4_curr[2][pos[0]][pos[1]-shift[1]][0].v - f4_curr[1][pos[0]][pos[1]][0].v + temp.v );
// y-polarization
temp.f[0] = 0;
temp.f[1] = f4_curr[0][pos[0]][pos[1]][numVectors-1].f[0];
temp.f[2] = f4_curr[0][pos[0]][pos[1]][numVectors-1].f[1];
temp.f[3] = f4_curr[0][pos[0]][pos[1]][numVectors-1].f[2];
f4_volt[1][pos[0]][pos[1]][0].v *= Op->f4_vv[1][pos[0]][pos[1]][0].v;
f4_volt[1][pos[0]][pos[1]][0].v += Op->f4_vi[1][pos[0]][pos[1]][0].v * ( f4_curr[0][pos[0]][pos[1]][0].v - temp.v - f4_curr[2][pos[0]][pos[1]][0].v + f4_curr[2][pos[0]-shift[0]][pos[1]][0].v);
// z-polarization
f4_volt[2][pos[0]][pos[1]][0].v *= Op->f4_vv[2][pos[0]][pos[1]][0].v;
f4_volt[2][pos[0]][pos[1]][0].v += Op->f4_vi[2][pos[0]][pos[1]][0].v * ( f4_curr[1][pos[0]][pos[1]][0].v - f4_curr[1][pos[0]-shift[0]][pos[1]][0].v - f4_curr[0][pos[0]][pos[1]][0].v + f4_curr[0][pos[0]][pos[1]-shift[1]][0].v);
}
++pos[0];
}
}
void Engine_sse::UpdateCurrents(unsigned int startX, unsigned int numX)
{
unsigned int pos[5];
f4vector temp;
pos[0] = startX;
for (unsigned int posX=0; posX<numX; ++posX)
{
for (pos[1]=0; pos[1]<numLines[1]-1; ++pos[1])
{
for (pos[2]=0; pos[2]<numVectors-1; ++pos[2])
{
// x-pol
f4_curr[0][pos[0]][pos[1]][pos[2]].v *= Op->f4_ii[0][pos[0]][pos[1]][pos[2]].v;
f4_curr[0][pos[0]][pos[1]][pos[2]].v += Op->f4_iv[0][pos[0]][pos[1]][pos[2]].v * ( f4_volt[2][pos[0]][pos[1]][pos[2]].v - f4_volt[2][pos[0]][pos[1]+1][pos[2]].v - f4_volt[1][pos[0]][pos[1]][pos[2]].v + f4_volt[1][pos[0]][pos[1]][pos[2]+1].v);
// y-pol
f4_curr[1][pos[0]][pos[1]][pos[2]].v *= Op->f4_ii[1][pos[0]][pos[1]][pos[2]].v;
f4_curr[1][pos[0]][pos[1]][pos[2]].v += Op->f4_iv[1][pos[0]][pos[1]][pos[2]].v * ( f4_volt[0][pos[0]][pos[1]][pos[2]].v - f4_volt[0][pos[0]][pos[1]][pos[2]+1].v - f4_volt[2][pos[0]][pos[1]][pos[2]].v + f4_volt[2][pos[0]+1][pos[1]][pos[2]].v);
// z-pol
f4_curr[2][pos[0]][pos[1]][pos[2]].v *= Op->f4_ii[2][pos[0]][pos[1]][pos[2]].v;
f4_curr[2][pos[0]][pos[1]][pos[2]].v += Op->f4_iv[2][pos[0]][pos[1]][pos[2]].v * ( f4_volt[1][pos[0]][pos[1]][pos[2]].v - f4_volt[1][pos[0]+1][pos[1]][pos[2]].v - f4_volt[0][pos[0]][pos[1]][pos[2]].v + f4_volt[0][pos[0]][pos[1]+1][pos[2]].v);
}
// for pos[2] = numVectors-1
// x-pol
temp.f[0] = f4_volt[1][pos[0]][pos[1]][0].f[1];
temp.f[1] = f4_volt[1][pos[0]][pos[1]][0].f[2];
temp.f[2] = f4_volt[1][pos[0]][pos[1]][0].f[3];
temp.f[3] = 0;
f4_curr[0][pos[0]][pos[1]][numVectors-1].v *= Op->f4_ii[0][pos[0]][pos[1]][numVectors-1].v;
f4_curr[0][pos[0]][pos[1]][numVectors-1].v += Op->f4_iv[0][pos[0]][pos[1]][numVectors-1].v * ( f4_volt[2][pos[0]][pos[1]][numVectors-1].v - f4_volt[2][pos[0]][pos[1]+1][numVectors-1].v - f4_volt[1][pos[0]][pos[1]][numVectors-1].v + temp.v);
// y-pol
temp.f[0] = f4_volt[0][pos[0]][pos[1]][0].f[1];
temp.f[1] = f4_volt[0][pos[0]][pos[1]][0].f[2];
temp.f[2] = f4_volt[0][pos[0]][pos[1]][0].f[3];
temp.f[3] = 0;
f4_curr[1][pos[0]][pos[1]][numVectors-1].v *= Op->f4_ii[1][pos[0]][pos[1]][numVectors-1].v;
f4_curr[1][pos[0]][pos[1]][numVectors-1].v += Op->f4_iv[1][pos[0]][pos[1]][numVectors-1].v * ( f4_volt[0][pos[0]][pos[1]][numVectors-1].v - temp.v - f4_volt[2][pos[0]][pos[1]][numVectors-1].v + f4_volt[2][pos[0]+1][pos[1]][numVectors-1].v);
// z-pol
f4_curr[2][pos[0]][pos[1]][numVectors-1].v *= Op->f4_ii[2][pos[0]][pos[1]][numVectors-1].v;
f4_curr[2][pos[0]][pos[1]][numVectors-1].v += Op->f4_iv[2][pos[0]][pos[1]][numVectors-1].v * ( f4_volt[1][pos[0]][pos[1]][numVectors-1].v - f4_volt[1][pos[0]+1][pos[1]][numVectors-1].v - f4_volt[0][pos[0]][pos[1]][numVectors-1].v + f4_volt[0][pos[0]][pos[1]+1][numVectors-1].v);
}
++pos[0];
}
}
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