/**
* @brief Computes the contribution to the FSR scalar flux from a segment.
* @details This method integrates the angular flux for a Track segment across
* energy groups and polar angles, and tallies it into the FSR scalar
* flux, and updates the Track's angular flux.
* @param curr_segment a pointer to the Track segment of interest
* @param azim_index a pointer to the azimuthal angle index for this segment
* @param track_flux a pointer to the Track's angular flux
* @param fsr_flux a pointer to the temporary FSR flux buffer
*/
void VectorizedSolver::tallyScalarFlux(segment* curr_segment,
int azim_index,
FP_PRECISION* track_flux,
FP_PRECISION* fsr_flux) {
int tid = omp_get_thread_num();
int fsr_id = curr_segment->_region_id;
FP_PRECISION* delta_psi = &_delta_psi[tid*_num_groups];
FP_PRECISION* exponentials = &_thread_exponentials[tid*_polar_times_groups];
computeExponentials(curr_segment, exponentials);
/* Set the FSR scalar flux buffer to zero */
memset(fsr_flux, 0.0, _num_groups * sizeof(FP_PRECISION));
/* Tally the flux contribution from segment to FSR's scalar flux */
/* Loop over polar angles */
for (int p=0; p < _num_polar; p++) {
/* Loop over each energy group vector length */
for (int v=0; v < _num_vector_lengths; v++) {
/* Loop over energy groups within this vector */
#pragma simd vectorlength(VEC_LENGTH)
for (int e=v*VEC_LENGTH; e < (v+1)*VEC_LENGTH; e++)
delta_psi[e] = track_flux(p,e) - _reduced_sources(fsr_id,e);
/* Loop over energy groups within this vector */
#pragma simd vectorlength(VEC_LENGTH)
for (int e=v*VEC_LENGTH; e < (v+1)*VEC_LENGTH; e++)
delta_psi[e] *= exponentials(p,e);
/* Loop over energy groups within this vector */
#pragma simd vectorlength(VEC_LENGTH)
for (int e=v*VEC_LENGTH; e < (v+1)*VEC_LENGTH; e++)
fsr_flux[e] += delta_psi[e] * _polar_weights(azim_index,p);
/* Loop over energy groups within this vector */
#pragma simd vectorlength(VEC_LENGTH)
for (int e=v*VEC_LENGTH; e < (v+1)*VEC_LENGTH; e++)
track_flux(p,e) -= delta_psi[e];
}
}
/* Atomically increment the FSR scalar flux from the temporary array */
omp_set_lock(&_FSR_locks[fsr_id]);
{
#ifdef SINGLE
vsAdd(_num_groups, &_scalar_flux(fsr_id,0), fsr_flux,
&_scalar_flux(fsr_id,0));
#else
vdAdd(_num_groups, &_scalar_flux(fsr_id,0), fsr_flux,
&_scalar_flux(fsr_id,0));
#endif
}
omp_unset_lock(&_FSR_locks[fsr_id]);
}
/**
* @brief Computes the contribution to the FSR scalar flux from a Track segment.
* @details This method integrates the angular flux for a Track segment across
* energy groups and polar angles, and tallies it into the FSR scalar
* flux, and updates the Track's angular flux.
* @param curr_segment a pointer to the Track segment of interest
* @param azim_index a pointer to the azimuthal angle index for this segment
* @param track_flux a pointer to the Track's angular flux
* @param fsr_flux a pointer to the temporary FSR flux buffer
* @param fwd
*/
void VectorizedSolver::scalarFluxTally(segment* curr_segment,
int azim_index,
FP_PRECISION* track_flux,
FP_PRECISION* fsr_flux,
bool fwd){
int tid = omp_get_thread_num();
int fsr_id = curr_segment->_region_id;
FP_PRECISION length = curr_segment->_length;
FP_PRECISION* sigma_t = curr_segment->_material->getSigmaT();
/* The change in angular flux along this Track segment in the FSR */
FP_PRECISION delta_psi;
FP_PRECISION* exponentials = &_thread_exponentials[tid*_polar_times_groups];
computeExponentials(curr_segment, exponentials);
/* Set the FSR scalar flux buffer to zero */
memset(fsr_flux, 0.0, _num_groups * sizeof(FP_PRECISION));
/* Tally the flux contribution from segment to FSR's scalar flux */
/* Loop over polar angles */
for (int p=0; p < _num_polar; p++){
/* Loop over each energy group vector length */
for (int v=0; v < _num_vector_lengths; v++) {
/* Loop over energy groups within this vector */
#pragma simd vectorlength(VEC_LENGTH) private(delta_psi)
for (int e=v*VEC_LENGTH; e < (v+1)*VEC_LENGTH; e++) {
delta_psi = (track_flux(p,e) - _reduced_source(fsr_id,e)) *
exponentials(p,e);
fsr_flux[e] += delta_psi * _polar_weights(azim_index,p);
track_flux(p,e) -= delta_psi;
}
}
}
/* Atomically increment the FSR scalar flux from the temporary array */
omp_set_lock(&_FSR_locks[fsr_id]);
{
#ifdef SINGLE
vsAdd(_num_groups, &_scalar_flux(fsr_id,0), fsr_flux,
&_scalar_flux(fsr_id,0));
#else
vdAdd(_num_groups, &_scalar_flux(fsr_id,0), fsr_flux,
&_scalar_flux(fsr_id,0));
#endif
}
omp_unset_lock(&_FSR_locks[fsr_id]);
return;
}
