441 lines
22 KiB
C
441 lines
22 KiB
C
/*
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* =======================================================================================
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*
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* Author: Jan Eitzinger (je), jan.eitzinger@fau.de
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* Copyright (c) 2021 RRZE, University Erlangen-Nuremberg
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*
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* This file is part of MD-Bench.
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*
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* MD-Bench is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* MD-Bench is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public License along
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* with MD-Bench. If not, see <https://www.gnu.org/licenses/>.
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* =======================================================================================
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*/
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#include <stdio.h>
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#include <likwid-marker.h>
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#include <timing.h>
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#include <neighbor.h>
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#include <parameter.h>
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#include <atom.h>
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#include <stats.h>
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#include <util.h>
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#include <simd.h>
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double computeForceLJ_ref(Parameter *param, Atom *atom, Neighbor *neighbor, Stats *stats) {
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DEBUG_MESSAGE("computeForceLJ begin\n");
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int Nlocal = atom->Nlocal;
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int* neighs;
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MD_FLOAT cutforcesq = param->cutforce * param->cutforce;
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MD_FLOAT sigma6 = param->sigma6;
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MD_FLOAT epsilon = param->epsilon;
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for(int ci = 0; ci < atom->Nclusters_local; ci++) {
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int ci_vec_base = CI_VECTOR_BASE_INDEX(ci);
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MD_FLOAT *ci_f = &atom->cl_f[ci_vec_base];
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for(int cii = 0; cii < atom->iclusters[ci].natoms; cii++) {
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ci_f[CL_X_OFFSET + cii] = 0.0;
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ci_f[CL_Y_OFFSET + cii] = 0.0;
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ci_f[CL_Z_OFFSET + cii] = 0.0;
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}
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}
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double S = getTimeStamp();
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LIKWID_MARKER_START("force");
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#pragma omp parallel for
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for(int ci = 0; ci < atom->Nclusters_local; ci++) {
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int ci_vec_base = CI_VECTOR_BASE_INDEX(ci);
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MD_FLOAT *ci_x = &atom->cl_x[ci_vec_base];
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MD_FLOAT *ci_f = &atom->cl_f[ci_vec_base];
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neighs = &neighbor->neighbors[ci * neighbor->maxneighs];
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int numneighs = neighbor->numneigh[ci];
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for(int k = 0; k < numneighs; k++) {
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int cj = neighs[k];
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int cj_vec_base = CJ_VECTOR_BASE_INDEX(cj);
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int any = 0;
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MD_FLOAT *cj_x = &atom->cl_x[cj_vec_base];
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for(int cii = 0; cii < CLUSTER_M; cii++) {
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MD_FLOAT xtmp = ci_x[CL_X_OFFSET + cii];
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MD_FLOAT ytmp = ci_x[CL_Y_OFFSET + cii];
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MD_FLOAT ztmp = ci_x[CL_Z_OFFSET + cii];
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MD_FLOAT fix = 0;
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MD_FLOAT fiy = 0;
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MD_FLOAT fiz = 0;
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for(int cjj = 0; cjj < CLUSTER_N; cjj++) {
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if(ci != cj || cii != cjj) {
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MD_FLOAT delx = xtmp - cj_x[CL_X_OFFSET + cjj];
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MD_FLOAT dely = ytmp - cj_x[CL_Y_OFFSET + cjj];
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MD_FLOAT delz = ztmp - cj_x[CL_Z_OFFSET + cjj];
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MD_FLOAT rsq = delx * delx + dely * dely + delz * delz;
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if(rsq < cutforcesq) {
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MD_FLOAT sr2 = 1.0 / rsq;
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MD_FLOAT sr6 = sr2 * sr2 * sr2 * sigma6;
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MD_FLOAT force = 48.0 * sr6 * (sr6 - 0.5) * sr2 * epsilon;
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fix += delx * force;
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fiy += dely * force;
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fiz += delz * force;
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any = 1;
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addStat(stats->atoms_within_cutoff, 1);
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} else {
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addStat(stats->atoms_outside_cutoff, 1);
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}
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}
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}
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if(any != 0) {
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addStat(stats->clusters_within_cutoff, 1);
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} else {
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addStat(stats->clusters_outside_cutoff, 1);
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}
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ci_f[CL_X_OFFSET + cii] += fix;
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ci_f[CL_Y_OFFSET + cii] += fiy;
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ci_f[CL_Z_OFFSET + cii] += fiz;
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}
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}
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addStat(stats->calculated_forces, 1);
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addStat(stats->num_neighs, numneighs);
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addStat(stats->force_iters, (long long int)((double)numneighs * CLUSTER_M / CLUSTER_N));
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}
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LIKWID_MARKER_STOP("force");
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double E = getTimeStamp();
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DEBUG_MESSAGE("computeForceLJ end\n");
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return E-S;
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}
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double computeForceLJ_2xnn(Parameter *param, Atom *atom, Neighbor *neighbor, Stats *stats) {
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DEBUG_MESSAGE("computeForceLJ_4xn begin\n");
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int Nlocal = atom->Nlocal;
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int* neighs;
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MD_FLOAT cutforcesq = param->cutforce * param->cutforce;
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MD_FLOAT sigma6 = param->sigma6;
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MD_FLOAT epsilon = param->epsilon;
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MD_SIMD_FLOAT cutforcesq_vec = simd_broadcast(cutforcesq);
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MD_SIMD_FLOAT sigma6_vec = simd_broadcast(sigma6);
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MD_SIMD_FLOAT epsilon_vec = simd_broadcast(epsilon);
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MD_SIMD_FLOAT c48_vec = simd_broadcast(48.0);
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MD_SIMD_FLOAT c05_vec = simd_broadcast(0.5);
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const int unroll_j = VECTOR_WIDTH / CLUSTER_N;
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double S = getTimeStamp();
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LIKWID_MARKER_START("force");
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#pragma omp parallel for
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for(int ci = 0; ci < atom->Nclusters_local; ci++) {
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int ci_vec_base = CI_VECTOR_BASE_INDEX(ci);
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MD_FLOAT *ci_x = &atom->cl_x[ci_vec_base];
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MD_FLOAT *ci_f = &atom->cl_f[ci_vec_base];
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neighs = &neighbor->neighbors[ci * neighbor->maxneighs];
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int numneighs = neighbor->numneigh[ci];
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MD_SIMD_FLOAT xi0_tmp = simd_broadcast(ci_x[CL_X_OFFSET + 0]);
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MD_SIMD_FLOAT xi1_tmp = simd_broadcast(ci_x[CL_X_OFFSET + 1]);
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MD_SIMD_FLOAT xi2_tmp = simd_broadcast(ci_x[CL_X_OFFSET + 2]);
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MD_SIMD_FLOAT xi3_tmp = simd_broadcast(ci_x[CL_X_OFFSET + 3]);
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MD_SIMD_FLOAT yi0_tmp = simd_broadcast(ci_x[CL_Y_OFFSET + 0]);
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MD_SIMD_FLOAT yi1_tmp = simd_broadcast(ci_x[CL_Y_OFFSET + 1]);
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MD_SIMD_FLOAT yi2_tmp = simd_broadcast(ci_x[CL_Y_OFFSET + 2]);
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MD_SIMD_FLOAT yi3_tmp = simd_broadcast(ci_x[CL_Y_OFFSET + 3]);
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MD_SIMD_FLOAT zi0_tmp = simd_broadcast(ci_x[CL_Z_OFFSET + 0]);
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MD_SIMD_FLOAT zi1_tmp = simd_broadcast(ci_x[CL_Z_OFFSET + 1]);
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MD_SIMD_FLOAT zi2_tmp = simd_broadcast(ci_x[CL_Z_OFFSET + 2]);
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MD_SIMD_FLOAT zi3_tmp = simd_broadcast(ci_x[CL_Z_OFFSET + 3]);
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MD_SIMD_FLOAT fix0 = simd_zero();
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MD_SIMD_FLOAT fiy0 = simd_zero();
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MD_SIMD_FLOAT fiz0 = simd_zero();
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MD_SIMD_FLOAT fix1 = simd_zero();
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MD_SIMD_FLOAT fiy1 = simd_zero();
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MD_SIMD_FLOAT fiz1 = simd_zero();
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MD_SIMD_FLOAT fix2 = simd_zero();
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MD_SIMD_FLOAT fiy2 = simd_zero();
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MD_SIMD_FLOAT fiz2 = simd_zero();
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MD_SIMD_FLOAT fix3 = simd_zero();
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MD_SIMD_FLOAT fiy3 = simd_zero();
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MD_SIMD_FLOAT fiz3 = simd_zero();
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for(int k = 0; k < numneighs; k += unroll_j) {
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int cj = neighs[k + 0];
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int cj_vec_base = CJ_VECTOR_BASE_INDEX(cj);
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MD_FLOAT *cj_x = &atom->cl_x[cj_vec_base];
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unsigned int cond0 = (unsigned int)(ci == cj);
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unsigned int cond1 = cond0;
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MD_SIMD_FLOAT xj_tmp, yj_tmp, zj_tmp;
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/*
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MD_FLOAT *cj0_ptr = cluster_pos_ptr(cj0);
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#if VECTOR_WIDTH == 8
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int cj1 = neighs[k + 1];
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unsigned int cond1 = (unsigned int)(ci == cj1);
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MD_FLOAT *cj1_ptr = cluster_pos_ptr(cj1);
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MD_SIMD_FLOAT xj_tmp = simd_load2(cj0_ptr, cj1_ptr, 0);
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MD_SIMD_FLOAT yj_tmp = simd_load2(cj0_ptr, cj1_ptr, 1);
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MD_SIMD_FLOAT zj_tmp = simd_load2(cj0_ptr, cj1_ptr, 2);
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#else
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MD_SIMD_FLOAT xj_tmp = simd_load(cj0_ptr, 0);
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MD_SIMD_FLOAT yj_tmp = simd_load(cj0_ptr, 1);
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MD_SIMD_FLOAT zj_tmp = simd_load(cj0_ptr, 2);
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#endif
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*/
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MD_SIMD_FLOAT delx0 = simd_sub(xi0_tmp, xj_tmp);
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MD_SIMD_FLOAT dely0 = simd_sub(yi0_tmp, yj_tmp);
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MD_SIMD_FLOAT delz0 = simd_sub(zi0_tmp, zj_tmp);
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MD_SIMD_FLOAT delx1 = simd_sub(xi1_tmp, xj_tmp);
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MD_SIMD_FLOAT dely1 = simd_sub(yi1_tmp, yj_tmp);
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MD_SIMD_FLOAT delz1 = simd_sub(zi1_tmp, zj_tmp);
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MD_SIMD_FLOAT delx2 = simd_sub(xi2_tmp, xj_tmp);
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MD_SIMD_FLOAT dely2 = simd_sub(yi2_tmp, yj_tmp);
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MD_SIMD_FLOAT delz2 = simd_sub(zi2_tmp, zj_tmp);
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MD_SIMD_FLOAT delx3 = simd_sub(xi3_tmp, xj_tmp);
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MD_SIMD_FLOAT dely3 = simd_sub(yi3_tmp, yj_tmp);
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MD_SIMD_FLOAT delz3 = simd_sub(zi3_tmp, zj_tmp);
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#if VECTOR_WIDTH == 8
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MD_SIMD_MASK excl_mask0 = simd_mask_from_u32((unsigned int)(0xff - 0x1 * cond0 - 0x10 * cond1));
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MD_SIMD_MASK excl_mask1 = simd_mask_from_u32((unsigned int)(0xff - 0x2 * cond0 - 0x20 * cond1));
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MD_SIMD_MASK excl_mask2 = simd_mask_from_u32((unsigned int)(0xff - 0x4 * cond0 - 0x40 * cond1));
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MD_SIMD_MASK excl_mask3 = simd_mask_from_u32((unsigned int)(0xff - 0x8 * cond0 - 0x80 * cond1));
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#else
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MD_SIMD_MASK excl_mask0 = simd_mask_from_u32((unsigned int)(0xf - 0x1 * cond0));
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MD_SIMD_MASK excl_mask1 = simd_mask_from_u32((unsigned int)(0xf - 0x2 * cond0));
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MD_SIMD_MASK excl_mask2 = simd_mask_from_u32((unsigned int)(0xf - 0x4 * cond0));
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MD_SIMD_MASK excl_mask3 = simd_mask_from_u32((unsigned int)(0xf - 0x8 * cond0));
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#endif
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MD_SIMD_FLOAT rsq0 = simd_fma(delx0, delx0, simd_fma(dely0, dely0, simd_mul(delz0, delz0)));
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MD_SIMD_FLOAT rsq1 = simd_fma(delx1, delx1, simd_fma(dely1, dely1, simd_mul(delz1, delz1)));
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MD_SIMD_FLOAT rsq2 = simd_fma(delx2, delx2, simd_fma(dely2, dely2, simd_mul(delz2, delz2)));
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MD_SIMD_FLOAT rsq3 = simd_fma(delx3, delx3, simd_fma(dely3, dely3, simd_mul(delz3, delz3)));
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MD_SIMD_MASK cutoff_mask0 = simd_mask_and(excl_mask0, simd_mask_cond_lt(rsq0, cutforcesq_vec));
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MD_SIMD_MASK cutoff_mask1 = simd_mask_and(excl_mask1, simd_mask_cond_lt(rsq1, cutforcesq_vec));
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MD_SIMD_MASK cutoff_mask2 = simd_mask_and(excl_mask2, simd_mask_cond_lt(rsq2, cutforcesq_vec));
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MD_SIMD_MASK cutoff_mask3 = simd_mask_and(excl_mask3, simd_mask_cond_lt(rsq3, cutforcesq_vec));
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MD_SIMD_FLOAT sr2_0 = simd_reciprocal(rsq0);
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MD_SIMD_FLOAT sr2_1 = simd_reciprocal(rsq1);
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MD_SIMD_FLOAT sr2_2 = simd_reciprocal(rsq2);
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MD_SIMD_FLOAT sr2_3 = simd_reciprocal(rsq3);
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MD_SIMD_FLOAT sr6_0 = simd_mul(sr2_0, simd_mul(sr2_0, simd_mul(sr2_0, sigma6_vec)));
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MD_SIMD_FLOAT sr6_1 = simd_mul(sr2_1, simd_mul(sr2_1, simd_mul(sr2_1, sigma6_vec)));
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MD_SIMD_FLOAT sr6_2 = simd_mul(sr2_2, simd_mul(sr2_2, simd_mul(sr2_2, sigma6_vec)));
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MD_SIMD_FLOAT sr6_3 = simd_mul(sr2_3, simd_mul(sr2_3, simd_mul(sr2_3, sigma6_vec)));
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MD_SIMD_FLOAT force0 = simd_mul(c48_vec, simd_mul(sr6_0, simd_mul(simd_sub(sr6_0, c05_vec), simd_mul(sr2_0, epsilon_vec))));
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MD_SIMD_FLOAT force1 = simd_mul(c48_vec, simd_mul(sr6_1, simd_mul(simd_sub(sr6_1, c05_vec), simd_mul(sr2_1, epsilon_vec))));
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MD_SIMD_FLOAT force2 = simd_mul(c48_vec, simd_mul(sr6_2, simd_mul(simd_sub(sr6_2, c05_vec), simd_mul(sr2_2, epsilon_vec))));
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MD_SIMD_FLOAT force3 = simd_mul(c48_vec, simd_mul(sr6_3, simd_mul(simd_sub(sr6_3, c05_vec), simd_mul(sr2_3, epsilon_vec))));
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fix0 = simd_masked_add(fix0, simd_mul(delx0, force0), cutoff_mask0);
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fiy0 = simd_masked_add(fiy0, simd_mul(dely0, force0), cutoff_mask0);
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fiz0 = simd_masked_add(fiz0, simd_mul(delz0, force0), cutoff_mask0);
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fix1 = simd_masked_add(fix1, simd_mul(delx1, force1), cutoff_mask1);
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fiy1 = simd_masked_add(fiy1, simd_mul(dely1, force1), cutoff_mask1);
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fiz1 = simd_masked_add(fiz1, simd_mul(delz1, force1), cutoff_mask1);
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fix2 = simd_masked_add(fix2, simd_mul(delx2, force2), cutoff_mask2);
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fiy2 = simd_masked_add(fiy2, simd_mul(dely2, force2), cutoff_mask2);
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fiz2 = simd_masked_add(fiz2, simd_mul(delz2, force2), cutoff_mask2);
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fix3 = simd_masked_add(fix3, simd_mul(delx3, force3), cutoff_mask3);
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fiy3 = simd_masked_add(fiy3, simd_mul(dely3, force3), cutoff_mask3);
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fiz3 = simd_masked_add(fiz3, simd_mul(delz3, force3), cutoff_mask3);
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}
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ci_f[CL_X_OFFSET + 0] = simd_horizontal_sum(fix0);
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ci_f[CL_X_OFFSET + 1] = simd_horizontal_sum(fix1);
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ci_f[CL_X_OFFSET + 2] = simd_horizontal_sum(fix2);
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ci_f[CL_X_OFFSET + 3] = simd_horizontal_sum(fix3);
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ci_f[CL_Y_OFFSET + 0] = simd_horizontal_sum(fiy0);
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ci_f[CL_Y_OFFSET + 1] = simd_horizontal_sum(fiy1);
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ci_f[CL_Y_OFFSET + 2] = simd_horizontal_sum(fiy2);
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ci_f[CL_Y_OFFSET + 3] = simd_horizontal_sum(fiy3);
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ci_f[CL_Z_OFFSET + 0] = simd_horizontal_sum(fiz0);
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ci_f[CL_Z_OFFSET + 1] = simd_horizontal_sum(fiz1);
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ci_f[CL_Z_OFFSET + 2] = simd_horizontal_sum(fiz2);
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ci_f[CL_Z_OFFSET + 3] = simd_horizontal_sum(fiz3);
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addStat(stats->calculated_forces, 1);
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addStat(stats->num_neighs, numneighs);
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addStat(stats->force_iters, (long long int)((double)numneighs * CLUSTER_M / CLUSTER_N));
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}
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LIKWID_MARKER_STOP("force");
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double E = getTimeStamp();
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DEBUG_MESSAGE("computeForceLJ_4xn end\n");
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return E-S;
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}
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double computeForceLJ_4xn(Parameter *param, Atom *atom, Neighbor *neighbor, Stats *stats) {
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DEBUG_MESSAGE("computeForceLJ_4xn begin\n");
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int Nlocal = atom->Nlocal;
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int* neighs;
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MD_FLOAT cutforcesq = param->cutforce * param->cutforce;
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MD_FLOAT sigma6 = param->sigma6;
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MD_FLOAT epsilon = param->epsilon;
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MD_SIMD_FLOAT cutforcesq_vec = simd_broadcast(cutforcesq);
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MD_SIMD_FLOAT sigma6_vec = simd_broadcast(sigma6);
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MD_SIMD_FLOAT epsilon_vec = simd_broadcast(epsilon);
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MD_SIMD_FLOAT c48_vec = simd_broadcast(48.0);
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MD_SIMD_FLOAT c05_vec = simd_broadcast(0.5);
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double S = getTimeStamp();
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LIKWID_MARKER_START("force");
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#pragma omp parallel for
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for(int ci = 0; ci < atom->Nclusters_local; ci++) {
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int ci_cj0 = CJ0_FROM_CI(ci);
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#if CLUSTER_M > CLUSTER_N
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int ci_cj1 = CJ1_FROM_CI(ci);
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#endif
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int ci_vec_base = CI_VECTOR_BASE_INDEX(ci);
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MD_FLOAT *ci_x = &atom->cl_x[ci_vec_base];
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MD_FLOAT *ci_f = &atom->cl_f[ci_vec_base];
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neighs = &neighbor->neighbors[ci * neighbor->maxneighs];
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int numneighs = neighbor->numneigh[ci];
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MD_SIMD_FLOAT xi0_tmp = simd_broadcast(ci_x[CL_X_OFFSET + 0]);
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MD_SIMD_FLOAT xi1_tmp = simd_broadcast(ci_x[CL_X_OFFSET + 1]);
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MD_SIMD_FLOAT xi2_tmp = simd_broadcast(ci_x[CL_X_OFFSET + 2]);
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MD_SIMD_FLOAT xi3_tmp = simd_broadcast(ci_x[CL_X_OFFSET + 3]);
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MD_SIMD_FLOAT yi0_tmp = simd_broadcast(ci_x[CL_Y_OFFSET + 0]);
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MD_SIMD_FLOAT yi1_tmp = simd_broadcast(ci_x[CL_Y_OFFSET + 1]);
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MD_SIMD_FLOAT yi2_tmp = simd_broadcast(ci_x[CL_Y_OFFSET + 2]);
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MD_SIMD_FLOAT yi3_tmp = simd_broadcast(ci_x[CL_Y_OFFSET + 3]);
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MD_SIMD_FLOAT zi0_tmp = simd_broadcast(ci_x[CL_Z_OFFSET + 0]);
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MD_SIMD_FLOAT zi1_tmp = simd_broadcast(ci_x[CL_Z_OFFSET + 1]);
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MD_SIMD_FLOAT zi2_tmp = simd_broadcast(ci_x[CL_Z_OFFSET + 2]);
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MD_SIMD_FLOAT zi3_tmp = simd_broadcast(ci_x[CL_Z_OFFSET + 3]);
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MD_SIMD_FLOAT fix0 = simd_zero();
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MD_SIMD_FLOAT fiy0 = simd_zero();
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MD_SIMD_FLOAT fiz0 = simd_zero();
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MD_SIMD_FLOAT fix1 = simd_zero();
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MD_SIMD_FLOAT fiy1 = simd_zero();
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MD_SIMD_FLOAT fiz1 = simd_zero();
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MD_SIMD_FLOAT fix2 = simd_zero();
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MD_SIMD_FLOAT fiy2 = simd_zero();
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MD_SIMD_FLOAT fiz2 = simd_zero();
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MD_SIMD_FLOAT fix3 = simd_zero();
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MD_SIMD_FLOAT fiy3 = simd_zero();
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MD_SIMD_FLOAT fiz3 = simd_zero();
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for(int k = 0; k < numneighs; k++) {
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int cj = neighs[k + 0];
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int cj_vec_base = CJ_VECTOR_BASE_INDEX(cj);
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MD_FLOAT *cj_x = &atom->cl_x[cj_vec_base];
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MD_SIMD_FLOAT xj_tmp = simd_load(&cj_x[CL_X_OFFSET]);
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MD_SIMD_FLOAT yj_tmp = simd_load(&cj_x[CL_Y_OFFSET]);
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MD_SIMD_FLOAT zj_tmp = simd_load(&cj_x[CL_Z_OFFSET]);
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MD_SIMD_FLOAT delx0 = simd_sub(xi0_tmp, xj_tmp);
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MD_SIMD_FLOAT dely0 = simd_sub(yi0_tmp, yj_tmp);
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MD_SIMD_FLOAT delz0 = simd_sub(zi0_tmp, zj_tmp);
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MD_SIMD_FLOAT delx1 = simd_sub(xi1_tmp, xj_tmp);
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MD_SIMD_FLOAT dely1 = simd_sub(yi1_tmp, yj_tmp);
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MD_SIMD_FLOAT delz1 = simd_sub(zi1_tmp, zj_tmp);
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MD_SIMD_FLOAT delx2 = simd_sub(xi2_tmp, xj_tmp);
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MD_SIMD_FLOAT dely2 = simd_sub(yi2_tmp, yj_tmp);
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MD_SIMD_FLOAT delz2 = simd_sub(zi2_tmp, zj_tmp);
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MD_SIMD_FLOAT delx3 = simd_sub(xi3_tmp, xj_tmp);
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MD_SIMD_FLOAT dely3 = simd_sub(yi3_tmp, yj_tmp);
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MD_SIMD_FLOAT delz3 = simd_sub(zi3_tmp, zj_tmp);
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#if CLUSTER_M == CLUSTER_N
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int cond0 = (unsigned int)(cj == ci_cj0);
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MD_SIMD_MASK excl_mask0 = simd_mask_from_u32((unsigned int)(0xf - 0x1 * cond0));
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MD_SIMD_MASK excl_mask1 = simd_mask_from_u32((unsigned int)(0xf - 0x2 * cond0));
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MD_SIMD_MASK excl_mask2 = simd_mask_from_u32((unsigned int)(0xf - 0x4 * cond0));
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MD_SIMD_MASK excl_mask3 = simd_mask_from_u32((unsigned int)(0xf - 0x8 * cond0));
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#elif CLUSTER_M < CLUSTER_N
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int cond0 = (unsigned int)(cj == (ci << 1) + 0);
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int cond1 = (unsigned int)(cj == (ci << 1) + 1);
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MD_SIMD_MASK excl_mask0 = simd_mask_from_u32((unsigned int)(0xff - 0x1 * cond0 - 0x10 * cond1));
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MD_SIMD_MASK excl_mask1 = simd_mask_from_u32((unsigned int)(0xff - 0x2 * cond0 - 0x20 * cond1));
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MD_SIMD_MASK excl_mask2 = simd_mask_from_u32((unsigned int)(0xff - 0x4 * cond0 - 0x40 * cond1));
|
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MD_SIMD_MASK excl_mask3 = simd_mask_from_u32((unsigned int)(0xff - 0x8 * cond0 - 0x80 * cond1));
|
|
#else
|
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unsigned int cond0 = (unsigned int)(cj == ci_cj0);
|
|
unsigned int cond1 = (unsigned int)(cj == ci_cj1);
|
|
MD_SIMD_MASK excl_mask0 = simd_mask_from_u32((unsigned int)(0x3 - 0x1 * cond0));
|
|
MD_SIMD_MASK excl_mask1 = simd_mask_from_u32((unsigned int)(0x3 - 0x2 * cond0));
|
|
MD_SIMD_MASK excl_mask2 = simd_mask_from_u32((unsigned int)(0x3 - 0x1 * cond1));
|
|
MD_SIMD_MASK excl_mask3 = simd_mask_from_u32((unsigned int)(0x3 - 0x2 * cond1));
|
|
#endif
|
|
|
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MD_SIMD_FLOAT rsq0 = simd_fma(delx0, delx0, simd_fma(dely0, dely0, simd_mul(delz0, delz0)));
|
|
MD_SIMD_FLOAT rsq1 = simd_fma(delx1, delx1, simd_fma(dely1, dely1, simd_mul(delz1, delz1)));
|
|
MD_SIMD_FLOAT rsq2 = simd_fma(delx2, delx2, simd_fma(dely2, dely2, simd_mul(delz2, delz2)));
|
|
MD_SIMD_FLOAT rsq3 = simd_fma(delx3, delx3, simd_fma(dely3, dely3, simd_mul(delz3, delz3)));
|
|
|
|
MD_SIMD_MASK cutoff_mask0 = simd_mask_and(excl_mask0, simd_mask_cond_lt(rsq0, cutforcesq_vec));
|
|
MD_SIMD_MASK cutoff_mask1 = simd_mask_and(excl_mask1, simd_mask_cond_lt(rsq1, cutforcesq_vec));
|
|
MD_SIMD_MASK cutoff_mask2 = simd_mask_and(excl_mask2, simd_mask_cond_lt(rsq2, cutforcesq_vec));
|
|
MD_SIMD_MASK cutoff_mask3 = simd_mask_and(excl_mask3, simd_mask_cond_lt(rsq3, cutforcesq_vec));
|
|
|
|
MD_SIMD_FLOAT sr2_0 = simd_reciprocal(rsq0);
|
|
MD_SIMD_FLOAT sr2_1 = simd_reciprocal(rsq1);
|
|
MD_SIMD_FLOAT sr2_2 = simd_reciprocal(rsq2);
|
|
MD_SIMD_FLOAT sr2_3 = simd_reciprocal(rsq3);
|
|
|
|
MD_SIMD_FLOAT sr6_0 = simd_mul(sr2_0, simd_mul(sr2_0, simd_mul(sr2_0, sigma6_vec)));
|
|
MD_SIMD_FLOAT sr6_1 = simd_mul(sr2_1, simd_mul(sr2_1, simd_mul(sr2_1, sigma6_vec)));
|
|
MD_SIMD_FLOAT sr6_2 = simd_mul(sr2_2, simd_mul(sr2_2, simd_mul(sr2_2, sigma6_vec)));
|
|
MD_SIMD_FLOAT sr6_3 = simd_mul(sr2_3, simd_mul(sr2_3, simd_mul(sr2_3, sigma6_vec)));
|
|
|
|
MD_SIMD_FLOAT force0 = simd_mul(c48_vec, simd_mul(sr6_0, simd_mul(simd_sub(sr6_0, c05_vec), simd_mul(sr2_0, epsilon_vec))));
|
|
MD_SIMD_FLOAT force1 = simd_mul(c48_vec, simd_mul(sr6_1, simd_mul(simd_sub(sr6_1, c05_vec), simd_mul(sr2_1, epsilon_vec))));
|
|
MD_SIMD_FLOAT force2 = simd_mul(c48_vec, simd_mul(sr6_2, simd_mul(simd_sub(sr6_2, c05_vec), simd_mul(sr2_2, epsilon_vec))));
|
|
MD_SIMD_FLOAT force3 = simd_mul(c48_vec, simd_mul(sr6_3, simd_mul(simd_sub(sr6_3, c05_vec), simd_mul(sr2_3, epsilon_vec))));
|
|
|
|
fix0 = simd_masked_add(fix0, simd_mul(delx0, force0), cutoff_mask0);
|
|
fiy0 = simd_masked_add(fiy0, simd_mul(dely0, force0), cutoff_mask0);
|
|
fiz0 = simd_masked_add(fiz0, simd_mul(delz0, force0), cutoff_mask0);
|
|
fix1 = simd_masked_add(fix1, simd_mul(delx1, force1), cutoff_mask1);
|
|
fiy1 = simd_masked_add(fiy1, simd_mul(dely1, force1), cutoff_mask1);
|
|
fiz1 = simd_masked_add(fiz1, simd_mul(delz1, force1), cutoff_mask1);
|
|
fix2 = simd_masked_add(fix2, simd_mul(delx2, force2), cutoff_mask2);
|
|
fiy2 = simd_masked_add(fiy2, simd_mul(dely2, force2), cutoff_mask2);
|
|
fiz2 = simd_masked_add(fiz2, simd_mul(delz2, force2), cutoff_mask2);
|
|
fix3 = simd_masked_add(fix3, simd_mul(delx3, force3), cutoff_mask3);
|
|
fiy3 = simd_masked_add(fiy3, simd_mul(dely3, force3), cutoff_mask3);
|
|
fiz3 = simd_masked_add(fiz3, simd_mul(delz3, force3), cutoff_mask3);
|
|
}
|
|
|
|
ci_f[CL_X_OFFSET + 0] = simd_horizontal_sum(fix0);
|
|
ci_f[CL_X_OFFSET + 1] = simd_horizontal_sum(fix1);
|
|
ci_f[CL_X_OFFSET + 2] = simd_horizontal_sum(fix2);
|
|
ci_f[CL_X_OFFSET + 3] = simd_horizontal_sum(fix3);
|
|
ci_f[CL_Y_OFFSET + 0] = simd_horizontal_sum(fiy0);
|
|
ci_f[CL_Y_OFFSET + 1] = simd_horizontal_sum(fiy1);
|
|
ci_f[CL_Y_OFFSET + 2] = simd_horizontal_sum(fiy2);
|
|
ci_f[CL_Y_OFFSET + 3] = simd_horizontal_sum(fiy3);
|
|
ci_f[CL_Z_OFFSET + 0] = simd_horizontal_sum(fiz0);
|
|
ci_f[CL_Z_OFFSET + 1] = simd_horizontal_sum(fiz1);
|
|
ci_f[CL_Z_OFFSET + 2] = simd_horizontal_sum(fiz2);
|
|
ci_f[CL_Z_OFFSET + 3] = simd_horizontal_sum(fiz3);
|
|
|
|
addStat(stats->calculated_forces, 1);
|
|
addStat(stats->num_neighs, numneighs);
|
|
addStat(stats->force_iters, (long long int)((double)numneighs * CLUSTER_M / CLUSTER_N));
|
|
}
|
|
|
|
LIKWID_MARKER_STOP("force");
|
|
double E = getTimeStamp();
|
|
DEBUG_MESSAGE("computeForceLJ_4xn end\n");
|
|
return E-S;
|
|
}
|