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|
// **************************************************************************
// sw.cu
// -------------------
// W. Michael Brown (ORNL)
//
// Device code for acceleration of the sw pair style
//
// __________________________________________________________________________
// This file is part of the LAMMPS Accelerator Library (LAMMPS_AL)
// __________________________________________________________________________
//
// begin : Tue March 26, 2013
// email : brownw@ornl.gov
// ***************************************************************************
#if defined(NV_KERNEL) || defined(USE_HIP)
#include "lal_aux_fun1.h"
#ifndef _DOUBLE_DOUBLE
_texture( pos_tex,float4);
_texture( sw1_tex,float4);
_texture( sw2_tex,float4);
_texture( sw3_tex,float4);
#else
_texture_2d( pos_tex,int4);
_texture( sw1_tex,int4);
_texture( sw2_tex,int4);
_texture( sw3_tex,int4);
#endif
#else
#define pos_tex x_
#define sw1_tex sw1
#define sw2_tex sw2
#define sw3_tex sw3
#endif
#define THIRD (numtyp)0.66666666666666666667
//#define THREE_CONCURRENT
#if (SHUFFLE_AVAIL == 0)
#define store_answers_p(f, energy, virial, ii, inum, tid, t_per_atom, \
offset, eflag, vflag, ans, engv, ev_stride) \
if (t_per_atom>1) { \
simd_reduce_add3(t_per_atom, red_acc, offset, tid, f.x, f.y, f.z); \
if (EVFLAG && (vflag==2 || eflag==2)) { \
if (eflag) { \
simdsync(); \
simd_reduce_add1(t_per_atom, red_acc, offset, tid, energy); \
} \
if (vflag) { \
simdsync(); \
simd_reduce_arr(6, t_per_atom, red_acc, offset, tid, virial); \
} \
} \
} \
if (offset==0 && ii<inum) { \
acctyp4 old=ans[ii]; \
old.x+=f.x; \
old.y+=f.y; \
old.z+=f.z; \
ans[ii]=old; \
} \
if (EVFLAG && (eflag || vflag)) { \
int ei=BLOCK_ID_X; \
if (eflag!=2 && vflag!=2) { \
if (eflag) { \
simdsync(); \
block_reduce_add1(simd_size(), red_acc, tid, energy); \
if (vflag) __syncthreads(); \
if (tid==0) { \
engv[ei]+=energy*(acctyp)0.5; \
ei+=ev_stride; \
} \
} \
if (vflag) { \
simdsync(); \
block_reduce_arr(6, simd_size(), red_acc, tid, virial); \
if (tid==0) { \
for (int r=0; r<6; r++) { \
engv[ei]+=virial[r]*(acctyp)0.5; \
ei+=ev_stride; \
} \
} \
} \
} else if (offset==0 && ii<inum) { \
int ei=ii; \
if (EVFLAG && eflag) { \
engv[ei]+=energy*(acctyp)0.5; \
ei+=inum; \
} \
if (EVFLAG && vflag) { \
for (int i=0; i<6; i++) { \
engv[ei]+=virial[i]*(acctyp)0.5; \
ei+=inum; \
} \
} \
} \
}
#else
#if (EVFLAG == 1)
#define store_answers_p(f, energy, virial, ii, inum, tid, t_per_atom, \
offset, eflag, vflag, ans, engv, ev_stride) \
if (t_per_atom>1) { \
simd_reduce_add3(t_per_atom, f.x, f.y, f.z); \
if (vflag==2 || eflag==2) { \
if (eflag) \
simd_reduce_add1(t_per_atom,energy); \
if (vflag) \
simd_reduce_arr(6, t_per_atom,virial); \
} \
} \
if (offset==0 && ii<inum) { \
acctyp4 old=ans[ii]; \
old.x+=f.x; \
old.y+=f.y; \
old.z+=f.z; \
ans[ii]=old; \
} \
if (eflag || vflag) { \
if (eflag!=2 && vflag!=2) { \
const int vwidth = simd_size(); \
const int voffset = tid & (simd_size() - 1); \
const int bnum = tid/simd_size(); \
int active_subgs = BLOCK_SIZE_X/simd_size(); \
for ( ; active_subgs > 1; active_subgs /= vwidth) { \
if (active_subgs < BLOCK_SIZE_X/simd_size()) __syncthreads(); \
if (bnum < active_subgs) { \
if (eflag) { \
simd_reduce_add1(vwidth, energy); \
if (voffset==0) red_acc[6][bnum] = energy; \
} \
if (vflag) { \
simd_reduce_arr(6, vwidth, virial); \
if (voffset==0) \
for (int r=0; r<6; r++) red_acc[r][bnum]=virial[r]; \
} \
} \
\
__syncthreads(); \
if (tid < active_subgs) { \
if (eflag) energy = red_acc[6][tid]; \
if (vflag) \
for (int r = 0; r < 6; r++) virial[r] = red_acc[r][tid]; \
} else { \
if (eflag) energy = (acctyp)0; \
if (vflag) for (int r = 0; r < 6; r++) virial[r] = (acctyp)0; \
} \
} \
\
if (bnum == 0) { \
int ei=BLOCK_ID_X; \
if (eflag) { \
simd_reduce_add1(vwidth, energy); \
if (tid==0) { \
engv[ei]+=energy*(acctyp)0.5; \
ei+=ev_stride; \
} \
} \
if (vflag) { \
simd_reduce_arr(6, vwidth, virial); \
if (tid==0) { \
for (int r=0; r<6; r++) { \
engv[ei]+=virial[r]*(acctyp)0.5; \
ei+=ev_stride; \
} \
} \
} \
} \
} else if (offset==0 && ii<inum) { \
int ei=ii; \
if (eflag) { \
engv[ei]+=energy*(acctyp)0.5; \
ei+=inum; \
} \
if (vflag) { \
for (int i=0; i<6; i++) { \
engv[ei]+=virial[i]*(acctyp)0.5; \
ei+=inum; \
} \
} \
} \
}
#else
#define store_answers_p(f, energy, virial, ii, inum, tid, t_per_atom, \
offset, eflag, vflag, ans, engv, ev_stride) \
if (t_per_atom>1) \
simd_reduce_add3(t_per_atom, f.x, f.y, f.z); \
if (offset==0 && ii<inum) { \
acctyp4 old=ans[ii]; \
old.x+=f.x; \
old.y+=f.y; \
old.z+=f.z; \
ans[ii]=old; \
}
#endif
#endif
__kernel void k_sw_short_nbor(const __global numtyp4 *restrict x_,
const __global numtyp * restrict cutsq,
const int ntypes, __global int * dev_nbor,
const __global int * dev_packed,
const int inum, const int nbor_pitch,
const int t_per_atom) {
const int ii=GLOBAL_ID_X;
#ifdef ONETYPE
const numtyp sw_cutsq=cutsq[ONETYPE];
#endif
if (ii<inum) {
const int i=dev_packed[ii];
int nbor=ii+nbor_pitch;
const int numj=dev_packed[nbor];
nbor+=nbor_pitch;
const int nbor_end=nbor+fast_mul(numj,nbor_pitch);
numtyp4 ix; fetch4(ix,i,pos_tex); //x_[i];
#ifndef ONETYPE
const int itype=ix.w*ntypes;
#endif
int newj=0;
__global int *out_list=dev_nbor+2*nbor_pitch+ii*t_per_atom;
const int out_stride=nbor_pitch*t_per_atom-t_per_atom;
for ( ; nbor<nbor_end; nbor+=nbor_pitch) {
int sj=dev_packed[nbor];
int j = sj & NEIGHMASK;
numtyp4 jx; fetch4(jx,j,pos_tex); //x_[j];
#ifndef ONETYPE
const int mtype=jx.w+itype;
const numtyp sw_cutsq=cutsq[mtype];
#endif
// Compute r12
numtyp delx = ix.x-jx.x;
numtyp dely = ix.y-jx.y;
numtyp delz = ix.z-jx.z;
numtyp rsq = delx*delx+dely*dely+delz*delz;
if (rsq<sw_cutsq) {
*out_list=sj;
out_list++;
newj++;
if ((newj & (t_per_atom-1))==0)
out_list+=out_stride;
}
} // for nbor
dev_nbor[ii+nbor_pitch]=newj;
} // if ii
}
__kernel void k_sw(const __global numtyp4 *restrict x_,
const __global numtyp4 * restrict sw_pre,
const __global numtyp4 * restrict c_14,
const __global numtyp2 * restrict c_56,
const int ntypes, const __global int * dev_nbor,
__global acctyp4 *restrict ans,
__global acctyp *restrict engv,
const int eflag, const int vflag, const int inum,
const int nbor_pitch, const int t_per_atom,
const int ev_stride) {
int n_stride;
int tid, ii, offset;
atom_info(t_per_atom,ii,tid,offset);
local_allocate_store_pair();
#ifdef ONETYPE
const numtyp4 pre_sw=sw_pre[ONETYPE];
const numtyp4 pre_sw_c14=c_14[ONETYPE];
numtyp2 pre_sw_c56;
if (EVFLAG && eflag) pre_sw_c56=c_56[ONETYPE];
#endif
acctyp4 f;
f.x=(acctyp)0; f.y=(acctyp)0; f.z=(acctyp)0;
acctyp energy, virial[6];
if (EVFLAG) {
energy=(acctyp)0;
for (int i=0; i<6; i++) virial[i]=(acctyp)0;
}
if (ii<inum) {
int nbor, nbor_end, i, numj;
nbor_info_p(dev_nbor,nbor_pitch,t_per_atom,ii,offset,i,numj,
n_stride,nbor_end,nbor);
numtyp4 ix; fetch4(ix,i,pos_tex); //x_[i];
#ifndef ONETYPE
int itype=ix.w;
itype*=ntypes;
#endif
for ( ; nbor<nbor_end; nbor+=n_stride) {
int j=dev_nbor[nbor];
j &= NEIGHMASK;
numtyp4 jx; fetch4(jx,j,pos_tex); //x_[j];
#ifndef ONETYPE
int mtype=jx.w;
mtype+=itype;
#endif
// Compute r12
numtyp delx = ix.x-jx.x;
numtyp dely = ix.y-jx.y;
numtyp delz = ix.z-jx.z;
numtyp rsq = delx*delx+dely*dely+delz*delz;
#ifndef ONETYPE
numtyp4 pre_sw=sw_pre[mtype];
numtyp4 pre_sw_c14=c_14[mtype];
#endif
numtyp r=ucl_sqrt(rsq);
#ifdef SPQ
numtyp rp=r*r;
rp=ucl_recip(rp*rp);
numtyp rq=(numtyp)1.0;
#else
numtyp rp=ucl_powr(r,-pre_sw.z);
numtyp rq=ucl_powr(r,-pre_sw.w);
#endif
numtyp rainv=ucl_recip(r-pre_sw.x);
numtyp expsrainv=ucl_exp(pre_sw.y*rainv);
rainv*=rainv*r;
numtyp force = (pre_sw_c14.x*rp-pre_sw_c14.y*rq +
(pre_sw_c14.z*rp-pre_sw_c14.w*rq) * rainv)*
expsrainv*ucl_recip(rsq);
f.x+=delx*force;
f.y+=dely*force;
f.z+=delz*force;
if (EVFLAG && eflag) {
#ifndef ONETYPE
numtyp2 pre_sw_c56=c_56[mtype];
#endif
energy+=(pre_sw_c56.x*rp - pre_sw_c56.y*rq) * expsrainv;
}
if (EVFLAG && vflag) {
virial[0] += delx*delx*force;
virial[1] += dely*dely*force;
virial[2] += delz*delz*force;
virial[3] += delx*dely*force;
virial[4] += delx*delz*force;
virial[5] += dely*delz*force;
}
} // for nbor
} // if ii
store_answers_p(f,energy,virial,ii,inum,tid,t_per_atom,offset,eflag,vflag,
ans,engv,ev_stride);
}
#define threebody(delr1x,delr1y,delr1z,delr2x,delr2y,delr2z, eflag, energy) \
{ \
numtyp r1 = ucl_sqrt(rsq1); \
numtyp rinvsq1 = ucl_recip(rsq1); \
numtyp rainv1 = ucl_recip(r1 - sw_cut_ij); \
numtyp gsrainv1 = sw_sigma_gamma_ij * rainv1; \
numtyp gsrainvsq1 = gsrainv1*rainv1/r1; \
numtyp expgsrainv1 = ucl_exp(gsrainv1); \
\
numtyp r2 = ucl_sqrt(rsq2); \
numtyp rinvsq2 = ucl_recip(rsq2); \
numtyp rainv2 = ucl_recip(r2 - sw_cut_ik); \
numtyp gsrainv2 = sw_sigma_gamma_ik * rainv2; \
numtyp gsrainvsq2 = gsrainv2*rainv2/r2; \
numtyp expgsrainv2 = ucl_exp(gsrainv2); \
\
numtyp rinv12 = ucl_recip(r1*r2); \
numtyp cs = (delr1x*delr2x + delr1y*delr2y + delr1z*delr2z) * rinv12; \
numtyp delcs = cs - sw_costheta_ijk; \
numtyp delcssq = delcs*delcs; \
\
numtyp facexp = expgsrainv1*expgsrainv2; \
\
numtyp facrad = sw_lambda_epsilon_ijk * facexp*delcssq; \
numtyp frad1 = facrad*gsrainvsq1; \
numtyp frad2 = facrad*gsrainvsq2; \
numtyp facang = (numtyp)2.0 * sw_lambda_epsilon_ijk * facexp*delcs; \
numtyp facang12 = rinv12*facang; \
numtyp csfacang = cs*facang; \
numtyp csfac1 = rinvsq1*csfacang; \
\
fjx = delr1x*(frad1+csfac1)-delr2x*facang12; \
fjy = delr1y*(frad1+csfac1)-delr2y*facang12; \
fjz = delr1z*(frad1+csfac1)-delr2z*facang12; \
\
numtyp csfac2 = rinvsq2*csfacang; \
\
fkx = delr2x*(frad2+csfac2)-delr1x*facang12; \
fky = delr2y*(frad2+csfac2)-delr1y*facang12; \
fkz = delr2z*(frad2+csfac2)-delr1z*facang12; \
\
if (EVFLAG && eflag) \
energy+=facrad; \
if (EVFLAG && vflag) { \
virial[0] += delr1x*fjx + delr2x*fkx; \
virial[1] += delr1y*fjy + delr2y*fky; \
virial[2] += delr1z*fjz + delr2z*fkz; \
virial[3] += delr1x*fjy + delr2x*fky; \
virial[4] += delr1x*fjz + delr2x*fkz; \
virial[5] += delr1y*fjz + delr2y*fkz; \
} \
}
#define threebody_half(delr1x, delr1y, delr1z, delr2x, delr2y, delr2z) \
{ \
numtyp r1 = ucl_sqrt(rsq1); \
numtyp rinvsq1 = ucl_recip(rsq1); \
numtyp rainv1 = ucl_recip(r1 - sw_cut_ij); \
numtyp gsrainv1 = sw_sigma_gamma_ij * rainv1; \
numtyp gsrainvsq1 = gsrainv1*rainv1/r1; \
numtyp expgsrainv1 = ucl_exp(gsrainv1); \
\
numtyp r2 = ucl_sqrt(rsq2); \
numtyp rainv2 = ucl_recip(r2 - sw_cut_ik); \
numtyp gsrainv2 = sw_sigma_gamma_ik * rainv2; \
numtyp expgsrainv2 = ucl_exp(gsrainv2); \
\
numtyp rinv12 = ucl_recip(r1*r2); \
numtyp cs = (delr1x*delr2x + delr1y*delr2y + delr1z*delr2z) * rinv12; \
numtyp delcs = cs - sw_costheta_ijk; \
numtyp delcssq = delcs*delcs; \
\
numtyp facexp = expgsrainv1*expgsrainv2; \
\
numtyp facrad = sw_lambda_epsilon_ijk * facexp*delcssq; \
numtyp frad1 = facrad*gsrainvsq1; \
numtyp facang = (numtyp)2.0 * sw_lambda_epsilon_ijk * facexp*delcs; \
numtyp facang12 = rinv12*facang; \
numtyp csfacang = cs*facang; \
numtyp csfac1 = rinvsq1*csfacang; \
\
fjx = delr1x*(frad1+csfac1)-delr2x*facang12; \
fjy = delr1y*(frad1+csfac1)-delr2y*facang12; \
fjz = delr1z*(frad1+csfac1)-delr2z*facang12; \
}
#ifdef ONETYPE
#define sw_cut_ij sw_cut
#define sw_cut_ik sw_cut
#define sw_sigma_gamma_ij sw_sigma_gamma
#define sw_sigma_gamma_ik sw_sigma_gamma
#endif
__kernel void k_sw_three_center(const __global numtyp4 *restrict x_,
const __global numtyp2 *restrict cut_sig_gamma,
const __global numtyp2 *restrict sw_pre3,
const int ntypes,
const __global int * dev_nbor,
__global acctyp4 *restrict ans,
__global acctyp *restrict engv,
const int eflag, const int vflag,
const int inum, const int nbor_pitch,
const int t_per_atom, const int evatom) {
int n_stride;
const int tpa_sq=fast_mul(t_per_atom,t_per_atom);
local_allocate_store_three();
int tid, ii, offset;
atom_info(tpa_sq,ii,tid,offset);
#ifdef ONETYPE
const numtyp sw_cut=cut_sig_gamma[ONETYPE].x;
const numtyp sw_sigma_gamma=cut_sig_gamma[ONETYPE].y;
const numtyp sw_lambda_epsilon_ijk=sw_pre3[ONETYPE3].x;
const numtyp sw_costheta_ijk=sw_pre3[ONETYPE3].y;
#endif
acctyp4 f;
f.x=(acctyp)0; f.y=(acctyp)0; f.z=(acctyp)0;
acctyp energy, virial[6];
if (EVFLAG) {
energy=(acctyp)0;
for (int i=0; i<6; i++) virial[i]=(acctyp)0;
}
if (ii<inum) {
int i, numj, nbor_j, nbor_end;
int offset_j=offset/t_per_atom;
nbor_info_p(dev_nbor,nbor_pitch,t_per_atom,ii,offset_j,i,numj,
n_stride,nbor_end,nbor_j);
int offset_k=tid & (t_per_atom-1);
numtyp4 ix; fetch4(ix,i,pos_tex); //x_[i];
#ifndef ONETYPE
int itype=ix.w;
itype*=ntypes;
#endif
for ( ; nbor_j<nbor_end; nbor_j+=n_stride) {
int j=dev_nbor[nbor_j];
j &= NEIGHMASK;
numtyp4 jx; fetch4(jx,j,pos_tex); //x_[j];
#ifndef ONETYPE
int mtypej=jx.w;
mtypej+=itype;
#endif
// Compute r12
numtyp delr1x = jx.x-ix.x;
numtyp delr1y = jx.y-ix.y;
numtyp delr1z = jx.z-ix.z;
numtyp rsq1 = delr1x*delr1x+delr1y*delr1y+delr1z*delr1z;
#ifndef ONETYPE
const numtyp sw_cut_ij=cut_sig_gamma[mtypej].x;
const numtyp sw_sigma_gamma_ij=cut_sig_gamma[mtypej].y;
#endif
int nbor_k;
nbor_k = nbor_j-offset_j+offset_k;
if (nbor_k<=nbor_j) nbor_k += n_stride;
for ( ; nbor_k<nbor_end; nbor_k+=n_stride) {
int k=dev_nbor[nbor_k];
k &= NEIGHMASK;
numtyp4 kx; fetch4(kx,k,pos_tex);
#ifndef ONETYPE
const int ktype=kx.w;
const int mtypek=itype+ktype;
#endif
numtyp delr2x = kx.x-ix.x;
numtyp delr2y = kx.y-ix.y;
numtyp delr2z = kx.z-ix.z;
numtyp rsq2 = delr2x*delr2x + delr2y*delr2y + delr2z*delr2z;
#ifndef ONETYPE
const numtyp sw_cut_ik=cut_sig_gamma[mtypek].x;
const numtyp sw_sigma_gamma_ik=cut_sig_gamma[mtypek].y;
const int mtypejk=ntypes*mtypej+ktype;
const numtyp sw_lambda_epsilon_ijk=sw_pre3[mtypejk].x;
const numtyp sw_costheta_ijk=sw_pre3[mtypejk].y;
#endif
numtyp fjx, fjy, fjz, fkx, fky, fkz;
threebody(delr1x,delr1y,delr1z,delr2x,delr2y,delr2z,eflag,energy);
f.x -= fjx + fkx;
f.y -= fjy + fky;
f.z -= fjz + fkz;
}
} // for nbor
if (EVFLAG) {
numtyp pre;
if (evatom==1)
pre=THIRD;
else
pre=(numtyp)2.0;
energy*=pre;
if (vflag)
for (int i=0; i<6; i++)
virial[i]*=pre;
}
} // if ii
store_answers(f,energy,virial,ii,inum,tid,tpa_sq,offset,
eflag,vflag,ans,engv);
}
__kernel void k_sw_three_end(const __global numtyp4 *restrict x_,
const __global numtyp2 *restrict cut_sig_gamma,
const __global numtyp2 *restrict sw_pre3,
const int ntypes, const __global int * dev_nbor,
const __global int * dev_ilist,
__global acctyp4 *restrict ans,
__global acctyp *restrict engv,
const int eflag, const int vflag,
const int inum, const int nbor_pitch,
const int t_per_atom, const int gpu_nbor) {
int n_stride;
const int tpa_sq=fast_mul(t_per_atom,t_per_atom);
int tid, ii, offset;
atom_info(tpa_sq,ii,tid,offset);
local_allocate_store_three();
#ifdef ONETYPE
const numtyp sw_cut=cut_sig_gamma[ONETYPE].x;
const numtyp sw_sigma_gamma=cut_sig_gamma[ONETYPE].y;
const numtyp sw_lambda_epsilon_ijk=sw_pre3[ONETYPE3].x;
const numtyp sw_costheta_ijk=sw_pre3[ONETYPE3].y;
#endif
acctyp4 f;
f.x=(acctyp)0; f.y=(acctyp)0; f.z=(acctyp)0;
acctyp energy, virial[6];
if (EVFLAG) {
energy=(acctyp)0;
for (int i=0; i<6; i++) virial[i]=(acctyp)0;
}
if (ii<inum) {
int i, numj, nbor_j, nbor_end, k_end;
int offset_j=offset/t_per_atom;
nbor_info_p(dev_nbor,nbor_pitch,t_per_atom,ii,offset_j,i,numj,
n_stride,nbor_end,nbor_j);
int offset_k=tid & (t_per_atom-1);
numtyp4 ix; fetch4(ix,i,pos_tex); //x_[i];
#ifndef ONETYPE
int itype=ix.w;
itype*=ntypes;
#endif
for ( ; nbor_j<nbor_end; nbor_j+=n_stride) {
int j=dev_nbor[nbor_j];
j &= NEIGHMASK;
numtyp4 jx; fetch4(jx,j,pos_tex); //x_[j];
#ifndef ONETYPE
const int jtype=jx.w;
const int mtypej=itype+jtype;
#endif
// Compute r12
numtyp delr1x = ix.x-jx.x;
numtyp delr1y = ix.y-jx.y;
numtyp delr1z = ix.z-jx.z;
numtyp rsq1 = delr1x*delr1x+delr1y*delr1y+delr1z*delr1z;
#ifndef ONETYPE
const numtyp sw_cut_ij=cut_sig_gamma[mtypej].x;
const numtyp sw_sigma_gamma_ij=cut_sig_gamma[mtypej].y;
#endif
int nbor_k;
if (gpu_nbor) nbor_k=j+nbor_pitch;
else nbor_k=dev_ilist[j]+nbor_pitch;
const int numk=dev_nbor[nbor_k];
nbor_k+=nbor_pitch+fast_mul(j,t_per_atom-1);
k_end=nbor_k+fast_mul(numk/t_per_atom,n_stride)+(numk&(t_per_atom-1));
nbor_k+=offset_k;
for ( ; nbor_k<k_end; nbor_k+=n_stride) {
int k=dev_nbor[nbor_k];
k &= NEIGHMASK;
if (k == i) continue;
numtyp4 kx; fetch4(kx,k,pos_tex);
#ifndef ONETYPE
const int ktype=kx.w;
const int mtypek=jtype*ntypes+ktype;
#endif
numtyp delr2x = kx.x - jx.x;
numtyp delr2y = kx.y - jx.y;
numtyp delr2z = kx.z - jx.z;
numtyp rsq2 = delr2x*delr2x + delr2y*delr2y + delr2z*delr2z;
#ifndef ONETYPE
const numtyp sw_cut_ik=cut_sig_gamma[mtypek].x;
const numtyp sw_sigma_gamma_ik=cut_sig_gamma[mtypek].y;
const int mtypejik=jtype*ntypes*ntypes+itype+ktype;
const numtyp sw_lambda_epsilon_ijk=sw_pre3[mtypejik].x;
const numtyp sw_costheta_ijk=sw_pre3[mtypejik].y;
#endif
numtyp fjx, fjy, fjz;
threebody_half(delr1x,delr1y,delr1z,delr2x,delr2y,delr2z);
f.x += fjx;
f.y += fjy;
f.z += fjz;
}
} // for nbor
} // if ii
#ifdef THREE_CONCURRENT
store_answers(f,energy,virial,ii,inum,tid,tpa_sq,offset,
eflag,vflag,ans,engv);
#else
store_answers_p(f,energy,virial,ii,inum,tid,tpa_sq,offset,
eflag,vflag,ans,engv,NUM_BLOCKS_X);
#endif
}
__kernel void k_sw_three_end_vatom(const __global numtyp4 *restrict x_,
const __global numtyp2 *restrict cut_sig_gamma,
const __global numtyp2 *restrict sw_pre3,
const int ntypes, const __global int * dev_nbor,
const __global int * dev_ilist,
__global acctyp4 *restrict ans,
__global acctyp *restrict engv,
const int eflag, const int vflag,
const int inum, const int nbor_pitch,
const int t_per_atom, const int gpu_nbor) {
int n_stride;
const int tpa_sq=fast_mul(t_per_atom,t_per_atom);
int tid, ii, offset;
atom_info(tpa_sq,ii,tid,offset);
local_allocate_store_three();
#ifdef ONETYPE
const numtyp sw_cut=cut_sig_gamma[ONETYPE].x;
const numtyp sw_sigma_gamma=cut_sig_gamma[ONETYPE].y;
const numtyp sw_lambda_epsilon_ijk=sw_pre3[ONETYPE3].x;
const numtyp sw_costheta_ijk=sw_pre3[ONETYPE3].y;
#endif
acctyp4 f;
f.x=(acctyp)0; f.y=(acctyp)0; f.z=(acctyp)0;
acctyp energy, virial[6];
if (EVFLAG) {
energy=(acctyp)0;
for (int i=0; i<6; i++) virial[i]=(acctyp)0;
}
if (ii<inum) {
int i, numj, nbor_j, nbor_end, k_end;
int offset_j=offset/t_per_atom;
nbor_info_p(dev_nbor,nbor_pitch,t_per_atom,ii,offset_j,i,numj,
n_stride,nbor_end,nbor_j);
int offset_k=tid & (t_per_atom-1);
numtyp4 ix; fetch4(ix,i,pos_tex); //x_[i];
#ifndef ONETYPE
int itype=ix.w;
itype*=ntypes;
#endif
for ( ; nbor_j<nbor_end; nbor_j+=n_stride) {
int j=dev_nbor[nbor_j];
j &= NEIGHMASK;
numtyp4 jx; fetch4(jx,j,pos_tex); //x_[j];
#ifndef ONETYPE
const int jtype=jx.w;
const int mtypej=itype+jtype;
#endif
// Compute r12
numtyp delr1x = ix.x-jx.x;
numtyp delr1y = ix.y-jx.y;
numtyp delr1z = ix.z-jx.z;
numtyp rsq1 = delr1x*delr1x+delr1y*delr1y+delr1z*delr1z;
#ifndef ONETYPE
const numtyp sw_cut_ij=cut_sig_gamma[mtypej].x;
const numtyp sw_sigma_gamma_ij=cut_sig_gamma[mtypej].y;
#endif
int nbor_k;
if (gpu_nbor) nbor_k=j+nbor_pitch;
else nbor_k=dev_ilist[j]+nbor_pitch;
const int numk=dev_nbor[nbor_k];
nbor_k+=nbor_pitch+fast_mul(j,t_per_atom-1);
k_end=nbor_k+fast_mul(numk/t_per_atom,n_stride)+(numk&(t_per_atom-1));
nbor_k+=offset_k;
for ( ; nbor_k<k_end; nbor_k+=n_stride) {
int k=dev_nbor[nbor_k];
k &= NEIGHMASK;
if (k == i) continue;
numtyp4 kx; fetch4(kx,k,pos_tex);
#ifndef ONETYPE
const int ktype=kx.w;
const int mtypek=jtype*ntypes+ktype;
#endif
numtyp delr2x = kx.x - jx.x;
numtyp delr2y = kx.y - jx.y;
numtyp delr2z = kx.z - jx.z;
numtyp rsq2 = delr2x*delr2x + delr2y*delr2y + delr2z*delr2z;
#ifndef ONETYPE
const numtyp sw_cut_ik=cut_sig_gamma[mtypek].x;
const numtyp sw_sigma_gamma_ik=cut_sig_gamma[mtypek].y;
const int mtypejik=jtype*ntypes*ntypes+itype+ktype;
const numtyp sw_lambda_epsilon_ijk=sw_pre3[mtypejik].x;
const numtyp sw_costheta_ijk=sw_pre3[mtypejik].y;
#endif
numtyp fjx, fjy, fjz, fkx, fky, fkz;
threebody(delr1x,delr1y,delr1z,delr2x,delr2y,delr2z,eflag,energy);
f.x += fjx;
f.y += fjy;
f.z += fjz;
}
} // for nbor
energy*=THIRD;
for (int i=0; i<6; i++)
virial[i]*=THIRD;
} // if ii
#ifdef THREE_CONCURRENT
store_answers(f,energy,virial,ii,inum,tid,tpa_sq,offset,
eflag,vflag,ans,engv);
#else
store_answers_p(f,energy,virial,ii,inum,tid,tpa_sq,offset,
eflag,vflag,ans,engv,NUM_BLOCKS_X);
#endif
}
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