forked from lijiext/lammps
737 lines
31 KiB
Plaintext
737 lines
31 KiB
Plaintext
// **************************************************************************
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// sw.cu
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// -------------------
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// W. Michael Brown (ORNL)
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//
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// Device code for acceleration of the sw pair style
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//
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// __________________________________________________________________________
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// This file is part of the LAMMPS Accelerator Library (LAMMPS_AL)
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// __________________________________________________________________________
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//
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// begin : Tue March 26, 2013
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// email : brownw@ornl.gov
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// ***************************************************************************/
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#ifdef NV_KERNEL
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#include "lal_aux_fun1.h"
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#ifndef _DOUBLE_DOUBLE
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texture<float4> pos_tex;
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texture<float4> sw1_tex;
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texture<float4> sw2_tex;
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texture<float4> sw3_tex;
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#else
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texture<int4,1> pos_tex;
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texture<int4> sw1_tex;
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texture<int4> sw2_tex;
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texture<int4> sw3_tex;
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#endif
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#else
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#define pos_tex x_
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#define sw1_tex sw1
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#define sw2_tex sw2
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#define sw3_tex sw3
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#endif
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#define THIRD (numtyp)0.66666667
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#if (ARCH < 300)
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#define store_answers_p(f, energy, virial, ii, inum, tid, t_per_atom, offset, \
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eflag, vflag, ans, engv) \
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if (t_per_atom>1) { \
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__local acctyp red_acc[6][BLOCK_ELLIPSE]; \
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red_acc[0][tid]=f.x; \
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red_acc[1][tid]=f.y; \
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red_acc[2][tid]=f.z; \
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red_acc[3][tid]=energy; \
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for (unsigned int s=t_per_atom/2; s>0; s>>=1) { \
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if (offset < s) { \
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for (int r=0; r<4; r++) \
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red_acc[r][tid] += red_acc[r][tid+s]; \
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} \
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} \
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f.x=red_acc[0][tid]; \
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f.y=red_acc[1][tid]; \
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f.z=red_acc[2][tid]; \
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energy=red_acc[3][tid]; \
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if (vflag>0) { \
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for (int r=0; r<6; r++) \
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red_acc[r][tid]=virial[r]; \
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for (unsigned int s=t_per_atom/2; s>0; s>>=1) { \
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if (offset < s) { \
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for (int r=0; r<6; r++) \
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red_acc[r][tid] += red_acc[r][tid+s]; \
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} \
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} \
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for (int r=0; r<6; r++) \
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virial[r]=red_acc[r][tid]; \
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} \
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} \
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if (offset==0) { \
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int ei=ii; \
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if (eflag>0) { \
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engv[ei]+=energy*(acctyp)0.5; \
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ei+=inum; \
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} \
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if (vflag>0) { \
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for (int i=0; i<6; i++) { \
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engv[ei]+=virial[i]*(acctyp)0.5; \
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ei+=inum; \
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} \
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} \
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acctyp4 old=ans[ii]; \
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old.x+=f.x; \
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old.y+=f.y; \
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old.z+=f.z; \
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ans[ii]=old; \
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}
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#else
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#define store_answers_p(f, energy, virial, ii, inum, tid, t_per_atom, offset, \
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eflag, vflag, ans, engv) \
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if (t_per_atom>1) { \
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for (unsigned int s=t_per_atom/2; s>0; s>>=1) { \
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f.x += shfl_xor(f.x, s, t_per_atom); \
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f.y += shfl_xor(f.y, s, t_per_atom); \
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f.z += shfl_xor(f.z, s, t_per_atom); \
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energy += shfl_xor(energy, s, t_per_atom); \
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} \
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if (vflag>0) { \
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for (unsigned int s=t_per_atom/2; s>0; s>>=1) { \
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for (int r=0; r<6; r++) \
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virial[r] += shfl_xor(virial[r], s, t_per_atom); \
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} \
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} \
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} \
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if (offset==0) { \
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int ei=ii; \
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if (eflag>0) { \
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engv[ei]+=energy*(acctyp)0.5; \
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ei+=inum; \
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} \
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if (vflag>0) { \
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for (int i=0; i<6; i++) { \
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engv[ei]+=virial[i]*(acctyp)0.5; \
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ei+=inum; \
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} \
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} \
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acctyp4 old=ans[ii]; \
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old.x+=f.x; \
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old.y+=f.y; \
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old.z+=f.z; \
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ans[ii]=old; \
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}
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#endif
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__kernel void k_sw(const __global numtyp4 *restrict x_,
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const __global numtyp4 *restrict sw1,
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const __global numtyp4 *restrict sw2,
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const __global numtyp4 *restrict sw3,
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const __global int *restrict map,
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const __global int *restrict elem2param,
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const int nelements,
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const __global int * dev_nbor,
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const __global int * dev_packed,
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__global acctyp4 *restrict ans,
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__global acctyp *restrict engv,
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const int eflag, const int vflag, const int inum,
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const int nbor_pitch, const int t_per_atom) {
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__local int n_stride;
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int tid, ii, offset;
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atom_info(t_per_atom,ii,tid,offset);
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acctyp energy=(acctyp)0;
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acctyp4 f;
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f.x=(acctyp)0; f.y=(acctyp)0; f.z=(acctyp)0;
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acctyp virial[6];
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for (int i=0; i<6; i++)
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virial[i]=(acctyp)0;
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__syncthreads();
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if (ii<inum) {
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int nbor, nbor_end;
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int i, numj;
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nbor_info(dev_nbor,dev_packed,nbor_pitch,t_per_atom,ii,offset,i,numj,
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n_stride,nbor_end,nbor);
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numtyp4 ix; fetch4(ix,i,pos_tex); //x_[i];
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int itype=ix.w;
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itype=map[itype];
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for ( ; nbor<nbor_end; nbor+=n_stride) {
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int j=dev_packed[nbor];
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j &= NEIGHMASK;
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numtyp4 jx; fetch4(jx,j,pos_tex); //x_[j];
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int jtype=jx.w;
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jtype=map[jtype];
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int ijparam=elem2param[itype*nelements*nelements+jtype*nelements+jtype];
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// Compute r12
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numtyp delx = ix.x-jx.x;
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numtyp dely = ix.y-jx.y;
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numtyp delz = ix.z-jx.z;
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numtyp rsq = delx*delx+dely*dely+delz*delz;
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if (rsq<sw3[ijparam].y) { // sw_cutsq = sw3[ijparam].y
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numtyp4 sw1_ijparam; fetch4(sw1_ijparam,ijparam,sw1_tex);
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numtyp sw_epsilon=sw1_ijparam.x;
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numtyp sw_sigma=sw1_ijparam.y;
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numtyp4 sw2_ijparam; fetch4(sw2_ijparam,ijparam,sw2_tex);
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numtyp sw_biga=sw2_ijparam.x;
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numtyp sw_bigb=sw2_ijparam.y;
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numtyp sw_powerp=sw2_ijparam.z;
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numtyp sw_powerq=sw2_ijparam.w;
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numtyp4 sw3_ijparam; fetch4(sw3_ijparam,ijparam,sw3_tex);
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numtyp sw_cut=sw3_ijparam.x;
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numtyp sw_cutsq=sw3_ijparam.y;
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numtyp pre_sw_c1=sw_biga*sw_epsilon*sw_powerp*sw_bigb*
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pow(sw_sigma,sw_powerp);
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numtyp pre_sw_c2=sw_biga*sw_epsilon*sw_powerq*
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pow(sw_sigma,sw_powerq);
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numtyp pre_sw_c3=sw_biga*sw_epsilon*sw_bigb*
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pow(sw_sigma,sw_powerp+(numtyp)1.0);
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numtyp pre_sw_c4=sw_biga*sw_epsilon*
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pow(sw_sigma,sw_powerq+(numtyp)1.0);
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numtyp pre_sw_c5=sw_biga*sw_epsilon*sw_bigb*
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pow(sw_sigma,sw_powerp);
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numtyp pre_sw_c6=sw_biga*sw_epsilon*
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pow(sw_sigma,sw_powerq);
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numtyp r=ucl_sqrt(rsq);
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numtyp rp=ucl_powr(r,-sw_powerp);
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numtyp rq=ucl_powr(r,-sw_powerq);
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numtyp rainv=ucl_recip(r-sw_cut);
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numtyp expsrainv=ucl_exp(sw_sigma*rainv);
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rainv*=rainv*r;
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numtyp force = (pre_sw_c1*rp-pre_sw_c2*rq +
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(pre_sw_c3*rp-pre_sw_c4*rq) * rainv)*
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expsrainv*ucl_recip(rsq);
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f.x+=delx*force;
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f.y+=dely*force;
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f.z+=delz*force;
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if (eflag>0)
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energy+=(pre_sw_c5*rp - pre_sw_c6*rq) * expsrainv;
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if (vflag>0) {
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virial[0] += delx*delx*force;
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virial[1] += dely*dely*force;
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virial[2] += delz*delz*force;
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virial[3] += delx*dely*force;
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virial[4] += delx*delz*force;
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virial[5] += dely*delz*force;
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}
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}
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} // for nbor
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store_answers(f,energy,virial,ii,inum,tid,t_per_atom,offset,eflag,vflag,
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ans,engv);
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} // if ii
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}
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#define threebody(delr1x, delr1y, delr1z, eflag, energy) \
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{ \
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numtyp r1 = ucl_sqrt(rsq1); \
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numtyp rinvsq1 = ucl_recip(rsq1); \
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numtyp rainv1 = ucl_recip(r1 - sw_cut_ij); \
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numtyp gsrainv1 = sw_sigma_gamma_ij * rainv1; \
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numtyp gsrainvsq1 = gsrainv1*rainv1/r1; \
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numtyp expgsrainv1 = ucl_exp(gsrainv1); \
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\
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numtyp r2 = ucl_sqrt(rsq2); \
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numtyp rinvsq2 = ucl_recip(rsq2); \
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numtyp rainv2 = ucl_recip(r2 - sw_cut_ik); \
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numtyp gsrainv2 = sw_sigma_gamma_ik * rainv2; \
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numtyp gsrainvsq2 = gsrainv2*rainv2/r2; \
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numtyp expgsrainv2 = ucl_exp(gsrainv2); \
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\
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numtyp rinv12 = ucl_recip(r1*r2); \
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numtyp cs = (delr1x*delr2x + delr1y*delr2y + delr1z*delr2z) * rinv12; \
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numtyp delcs = cs - sw_costheta_ijk; \
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numtyp delcssq = delcs*delcs; \
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\
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numtyp facexp = expgsrainv1*expgsrainv2; \
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\
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numtyp facrad = sw_lambda_epsilon_ijk * facexp*delcssq; \
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numtyp frad1 = facrad*gsrainvsq1; \
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numtyp frad2 = facrad*gsrainvsq2; \
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numtyp facang = sw_lambda_epsilon2_ijk * facexp*delcs; \
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numtyp facang12 = rinv12*facang; \
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numtyp csfacang = cs*facang; \
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numtyp csfac1 = rinvsq1*csfacang; \
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\
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fjx = delr1x*(frad1+csfac1)-delr2x*facang12; \
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fjy = delr1y*(frad1+csfac1)-delr2y*facang12; \
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fjz = delr1z*(frad1+csfac1)-delr2z*facang12; \
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\
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numtyp csfac2 = rinvsq2*csfacang; \
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\
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fkx = delr2x*(frad2+csfac2)-delr1x*facang12; \
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fky = delr2y*(frad2+csfac2)-delr1y*facang12; \
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fkz = delr2z*(frad2+csfac2)-delr1z*facang12; \
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\
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if (eflag>0) \
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energy+=facrad; \
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if (vflag>0) { \
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virial[0] += delr1x*fjx + delr2x*fkx; \
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virial[1] += delr1y*fjy + delr2y*fky; \
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virial[2] += delr1z*fjz + delr2z*fkz; \
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virial[3] += delr1x*fjy + delr2x*fky; \
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virial[4] += delr1x*fjz + delr2x*fkz; \
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virial[5] += delr1y*fjz + delr2y*fkz; \
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} \
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}
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#define threebody_half(delr1x, delr1y, delr1z) \
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{ \
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numtyp r1 = ucl_sqrt(rsq1); \
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numtyp rinvsq1 = ucl_recip(rsq1); \
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numtyp rainv1 = ucl_recip(r1 - sw_cut_ij); \
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numtyp gsrainv1 = sw_sigma_gamma_ij * rainv1; \
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numtyp gsrainvsq1 = gsrainv1*rainv1/r1; \
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numtyp expgsrainv1 = ucl_exp(gsrainv1); \
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\
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numtyp r2 = ucl_sqrt(rsq2); \
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numtyp rainv2 = ucl_recip(r2 - sw_cut_ik); \
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numtyp gsrainv2 = sw_sigma_gamma_ik * rainv2; \
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numtyp expgsrainv2 = ucl_exp(gsrainv2); \
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\
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numtyp rinv12 = ucl_recip(r1*r2); \
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numtyp cs = (delr1x*delr2x + delr1y*delr2y + delr1z*delr2z) * rinv12; \
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numtyp delcs = cs - sw_costheta_ijk; \
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numtyp delcssq = delcs*delcs; \
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\
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numtyp facexp = expgsrainv1*expgsrainv2; \
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\
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numtyp facrad = sw_lambda_epsilon_ijk * facexp*delcssq; \
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numtyp frad1 = facrad*gsrainvsq1; \
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numtyp facang = sw_lambda_epsilon2_ijk * facexp*delcs; \
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numtyp facang12 = rinv12*facang; \
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numtyp csfacang = cs*facang; \
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numtyp csfac1 = rinvsq1*csfacang; \
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\
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fjx = delr1x*(frad1+csfac1)-delr2x*facang12; \
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fjy = delr1y*(frad1+csfac1)-delr2y*facang12; \
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fjz = delr1z*(frad1+csfac1)-delr2z*facang12; \
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}
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__kernel void k_sw_three_center(const __global numtyp4 *restrict x_,
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const __global numtyp4 *restrict sw1,
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const __global numtyp4 *restrict sw2,
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const __global numtyp4 *restrict sw3,
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const __global int *restrict map,
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const __global int *restrict elem2param,
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const int nelements,
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const __global int * dev_nbor,
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const __global int * dev_packed,
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__global acctyp4 *restrict ans,
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__global acctyp *restrict engv,
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const int eflag, const int vflag,
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const int inum, const int nbor_pitch,
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const int t_per_atom, const int evatom) {
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__local int tpa_sq, n_stride;
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tpa_sq=fast_mul(t_per_atom,t_per_atom);
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numtyp sw_epsilon, sw_sigma, sw_lambda, sw_gamma;
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numtyp sw_sigma_gamma_ij, sw_cut_ij, sw_sigma_gamma_ik, sw_cut_ik;
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numtyp sw_costheta_ijk, sw_lambda_epsilon_ijk, sw_lambda_epsilon2_ijk;
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int tid, ii, offset;
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atom_info(tpa_sq,ii,tid,offset);
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acctyp energy=(acctyp)0;
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acctyp4 f;
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f.x=(acctyp)0; f.y=(acctyp)0; f.z=(acctyp)0;
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acctyp virial[6];
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for (int i=0; i<6; i++)
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virial[i]=(acctyp)0;
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__syncthreads();
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if (ii<inum) {
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int i, numj, nbor_j, nbor_end;
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int offset_j=offset/t_per_atom;
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nbor_info(dev_nbor,dev_packed,nbor_pitch,t_per_atom,ii,offset_j,i,numj,
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n_stride,nbor_end,nbor_j);
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int offset_k=tid & (t_per_atom-1);
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numtyp4 ix; fetch4(ix,i,pos_tex); //x_[i];
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int itype=ix.w;
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itype=map[itype];
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for ( ; nbor_j<nbor_end; nbor_j+=n_stride) {
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int j=dev_packed[nbor_j];
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j &= NEIGHMASK;
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numtyp4 jx; fetch4(jx,j,pos_tex); //x_[j];
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int jtype=jx.w;
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jtype=map[jtype];
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// Compute r12
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numtyp delr1x = jx.x-ix.x;
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numtyp delr1y = jx.y-ix.y;
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numtyp delr1z = jx.z-ix.z;
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numtyp rsq1 = delr1x*delr1x+delr1y*delr1y+delr1z*delr1z;
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int ijparam=elem2param[itype*nelements*nelements+jtype*nelements+jtype];
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numtyp4 sw3_ijparam; fetch4(sw3_ijparam,ijparam,sw3_tex);
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if (rsq1 > sw3_ijparam.y) continue;
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numtyp4 sw1_ijparam; fetch4(sw1_ijparam,ijparam,sw1_tex);
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sw_sigma=sw1_ijparam.y;
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sw_gamma=sw1_ijparam.w;
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sw_sigma_gamma_ij=sw1_ijparam.y*sw1_ijparam.w; //sw_sigma*sw_gamma;
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sw_cut_ij=sw3_ijparam.x;
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int nbor_k=nbor_j-offset_j+offset_k;
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if (nbor_k<=nbor_j)
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nbor_k+=n_stride;
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for ( ; nbor_k<nbor_end; nbor_k+=n_stride) {
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int k=dev_packed[nbor_k];
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k &= NEIGHMASK;
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numtyp4 kx; fetch4(kx,k,pos_tex);
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int ktype=kx.w;
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ktype=map[ktype];
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int ikparam=elem2param[itype*nelements*nelements+ktype*nelements+ktype];
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numtyp4 sw3_ikparam; fetch4(sw3_ikparam,ikparam,sw3_tex);
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numtyp delr2x = kx.x-ix.x;
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numtyp delr2y = kx.y-ix.y;
|
|
numtyp delr2z = kx.z-ix.z;
|
|
numtyp rsq2 = delr2x*delr2x + delr2y*delr2y + delr2z*delr2z;
|
|
if (rsq2 < sw3_ikparam.y) { // sw_cutsq=sw3[ikparam].y;
|
|
numtyp4 sw1_ikparam; fetch4(sw1_ikparam,ikparam,sw1_tex);
|
|
sw_sigma=sw1_ikparam.y;
|
|
sw_gamma=sw1_ikparam.w;
|
|
sw_sigma_gamma_ik=sw1_ikparam.y*sw1_ikparam.w; //sw_sigma*sw_gamma;
|
|
sw_cut_ik=sw3_ikparam.x;
|
|
|
|
int ijkparam=elem2param[itype*nelements*nelements+jtype*nelements+ktype];
|
|
numtyp4 sw1_ijkparam; fetch4(sw1_ijkparam,ijkparam,sw1_tex);
|
|
sw_epsilon=sw1_ijkparam.x;
|
|
sw_lambda=sw1_ijkparam.z;
|
|
sw_lambda_epsilon_ijk=sw1_ijkparam.x*sw1_ijkparam.z; //sw_lambda*sw_epsilon;
|
|
sw_lambda_epsilon2_ijk=(numtyp)2.0*sw_lambda_epsilon_ijk;
|
|
numtyp4 sw3_ijkparam; fetch4(sw3_ijkparam,ijkparam,sw3_tex);
|
|
sw_costheta_ijk=sw3_ijkparam.z;
|
|
|
|
numtyp fjx, fjy, fjz, fkx, fky, fkz;
|
|
threebody(delr1x,delr1y,delr1z,eflag,energy);
|
|
|
|
f.x -= fjx + fkx;
|
|
f.y -= fjy + fky;
|
|
f.z -= fjz + fkz;
|
|
}
|
|
}
|
|
} // for nbor
|
|
|
|
numtyp pre;
|
|
if (evatom==1)
|
|
pre=THIRD;
|
|
else
|
|
pre=(numtyp)2.0;
|
|
energy*=pre;
|
|
for (int i=0; i<6; i++)
|
|
virial[i]*=pre;
|
|
|
|
store_answers_p(f,energy,virial,ii,inum,tid,tpa_sq,offset,
|
|
eflag,vflag,ans,engv);
|
|
|
|
} // if ii
|
|
}
|
|
|
|
__kernel void k_sw_three_end(const __global numtyp4 *restrict x_,
|
|
const __global numtyp4 *restrict sw1,
|
|
const __global numtyp4 *restrict sw2,
|
|
const __global numtyp4 *restrict sw3,
|
|
const __global int *restrict map,
|
|
const __global int *restrict elem2param,
|
|
const int nelements,
|
|
const __global int * dev_nbor,
|
|
const __global int * dev_packed,
|
|
__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) {
|
|
__local int tpa_sq, n_stride;
|
|
tpa_sq=fast_mul(t_per_atom,t_per_atom);
|
|
numtyp sw_epsilon, sw_sigma, sw_lambda, sw_gamma;
|
|
numtyp sw_sigma_gamma_ij, sw_cut_ij, sw_sigma_gamma_ik, sw_cut_ik;
|
|
numtyp sw_costheta_ijk, sw_lambda_epsilon_ijk, sw_lambda_epsilon2_ijk;
|
|
|
|
int tid, ii, offset;
|
|
atom_info(tpa_sq,ii,tid,offset);
|
|
|
|
acctyp energy=(acctyp)0;
|
|
acctyp4 f;
|
|
f.x=(acctyp)0; f.y=(acctyp)0; f.z=(acctyp)0;
|
|
acctyp virial[6];
|
|
for (int i=0; i<6; i++)
|
|
virial[i]=(acctyp)0;
|
|
|
|
__syncthreads();
|
|
|
|
if (ii<inum) {
|
|
int i, numj, nbor_j, nbor_end, k_end;
|
|
|
|
int offset_j=offset/t_per_atom;
|
|
nbor_info(dev_nbor,dev_packed,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];
|
|
int itype=ix.w;
|
|
itype=map[itype];
|
|
|
|
for ( ; nbor_j<nbor_end; nbor_j+=n_stride) {
|
|
int j=dev_packed[nbor_j];
|
|
j &= NEIGHMASK;
|
|
|
|
numtyp4 jx; fetch4(jx,j,pos_tex); //x_[j];
|
|
int jtype=jx.w;
|
|
jtype=map[jtype];
|
|
|
|
// 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;
|
|
|
|
int ijparam=elem2param[itype*nelements*nelements+jtype*nelements+jtype];
|
|
numtyp4 sw3_ijparam; fetch4(sw3_ijparam,ijparam,sw3_tex);
|
|
|
|
if (rsq1 > sw3_ijparam.y) continue;
|
|
|
|
numtyp4 sw1_ijparam; fetch4(sw1_ijparam,ijparam,sw1_tex);
|
|
sw_sigma=sw1_ijparam.y;
|
|
sw_gamma=sw1_ijparam.w;
|
|
sw_sigma_gamma_ij=sw1_ijparam.y*sw1_ijparam.w; //sw_sigma*sw_gamma;
|
|
sw_cut_ij=sw3_ijparam.x;
|
|
|
|
int nbor_k=j+nbor_pitch;
|
|
int numk=dev_nbor[nbor_k];
|
|
if (dev_nbor==dev_packed) {
|
|
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;
|
|
} else {
|
|
nbor_k+=nbor_pitch;
|
|
nbor_k=dev_nbor[nbor_k];
|
|
k_end=nbor_k+numk;
|
|
nbor_k+=offset_k;
|
|
}
|
|
|
|
for ( ; nbor_k<k_end; nbor_k+=n_stride) {
|
|
int k=dev_packed[nbor_k];
|
|
k &= NEIGHMASK;
|
|
|
|
if (k == i) continue;
|
|
|
|
numtyp4 kx; fetch4(kx,k,pos_tex);
|
|
int ktype=kx.w;
|
|
ktype=map[ktype];
|
|
int ikparam=elem2param[itype*nelements*nelements+ktype*nelements+ktype];
|
|
|
|
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;
|
|
numtyp4 sw3_ikparam; fetch4(sw3_ikparam,ikparam,sw3_tex);
|
|
|
|
if (rsq2 < sw3_ikparam.y) {
|
|
numtyp4 sw1_ikparam; fetch4(sw1_ikparam,ikparam,sw1_tex);
|
|
sw_sigma=sw1_ikparam.y;
|
|
sw_gamma=sw1_ikparam.w;
|
|
sw_sigma_gamma_ik=sw1_ikparam.y*sw1_ikparam.w; //sw_sigma*sw_gamma;
|
|
sw_cut_ik=sw3_ikparam.x;
|
|
|
|
int ijkparam=elem2param[itype*nelements*nelements+jtype*nelements+ktype];
|
|
numtyp4 sw1_ijkparam; fetch4(sw1_ijkparam,ijkparam,sw1_tex);
|
|
sw_epsilon=sw1_ijkparam.x;
|
|
sw_lambda=sw1_ijkparam.z;
|
|
sw_lambda_epsilon_ijk=sw1_ijkparam.x*sw1_ijkparam.z; //sw_lambda*sw_epsilon;
|
|
sw_lambda_epsilon2_ijk=(numtyp)2.0*sw_lambda_epsilon_ijk;
|
|
numtyp4 sw3_ijkparam; fetch4(sw3_ijkparam,ijkparam,sw3_tex);
|
|
sw_costheta_ijk=sw3_ijkparam.z;
|
|
|
|
numtyp fjx, fjy, fjz;
|
|
//if (evatom==0) {
|
|
threebody_half(delr1x,delr1y,delr1z);
|
|
//} else {
|
|
// numtyp fkx, fky, fkz;
|
|
// threebody(delr1x,delr1y,delr1z,eflag,energy);
|
|
//}
|
|
|
|
f.x += fjx;
|
|
f.y += fjy;
|
|
f.z += fjz;
|
|
}
|
|
}
|
|
|
|
} // for nbor
|
|
#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);
|
|
#endif
|
|
} // if ii
|
|
}
|
|
|
|
__kernel void k_sw_three_end_vatom(const __global numtyp4 *restrict x_,
|
|
const __global numtyp4 *restrict sw1,
|
|
const __global numtyp4 *restrict sw2,
|
|
const __global numtyp4 *restrict sw3,
|
|
const __global int *restrict map,
|
|
const __global int *restrict elem2param,
|
|
const int nelements,
|
|
const __global int * dev_nbor,
|
|
const __global int * dev_packed,
|
|
__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) {
|
|
__local int tpa_sq, n_stride;
|
|
tpa_sq=fast_mul(t_per_atom,t_per_atom);
|
|
numtyp sw_epsilon, sw_sigma, sw_lambda, sw_gamma;
|
|
numtyp sw_sigma_gamma_ij, sw_cut_ij, sw_sigma_gamma_ik, sw_cut_ik;
|
|
numtyp sw_costheta_ijk, sw_lambda_epsilon_ijk, sw_lambda_epsilon2_ijk;
|
|
|
|
int tid, ii, offset;
|
|
atom_info(tpa_sq,ii,tid,offset);
|
|
|
|
acctyp energy=(acctyp)0;
|
|
acctyp4 f;
|
|
f.x=(acctyp)0; f.y=(acctyp)0; f.z=(acctyp)0;
|
|
acctyp virial[6];
|
|
for (int i=0; i<6; i++)
|
|
virial[i]=(acctyp)0;
|
|
|
|
__syncthreads();
|
|
|
|
if (ii<inum) {
|
|
int i, numj, nbor_j, nbor_end, k_end;
|
|
|
|
int offset_j=offset/t_per_atom;
|
|
nbor_info(dev_nbor,dev_packed,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];
|
|
int itype=ix.w;
|
|
itype=map[itype];
|
|
|
|
for ( ; nbor_j<nbor_end; nbor_j+=n_stride) {
|
|
int j=dev_packed[nbor_j];
|
|
j &= NEIGHMASK;
|
|
|
|
numtyp4 jx; fetch4(jx,j,pos_tex); //x_[j];
|
|
int jtype=jx.w;
|
|
jtype=map[jtype];
|
|
|
|
// 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;
|
|
|
|
int ijparam=elem2param[itype*nelements*nelements+jtype*nelements+jtype];
|
|
numtyp4 sw3_ijparam; fetch4(sw3_ijparam,ijparam,sw3_tex);
|
|
|
|
if (rsq1 > sw3_ijparam.y) continue;
|
|
|
|
numtyp4 sw1_ijparam; fetch4(sw1_ijparam,ijparam,sw1_tex);
|
|
sw_sigma=sw1_ijparam.y;
|
|
sw_gamma=sw1_ijparam.w;
|
|
sw_sigma_gamma_ij=sw1_ijparam.y*sw1_ijparam.w; //sw_sigma*sw_gamma;
|
|
sw_cut_ij=sw3_ijparam.x;
|
|
|
|
int nbor_k=j+nbor_pitch;
|
|
int numk=dev_nbor[nbor_k];
|
|
if (dev_nbor==dev_packed) {
|
|
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;
|
|
} else {
|
|
nbor_k+=nbor_pitch;
|
|
nbor_k=dev_nbor[nbor_k];
|
|
k_end=nbor_k+numk;
|
|
nbor_k+=offset_k;
|
|
}
|
|
|
|
for ( ; nbor_k<k_end; nbor_k+=n_stride) {
|
|
int k=dev_packed[nbor_k];
|
|
k &= NEIGHMASK;
|
|
|
|
if (k == i) continue;
|
|
|
|
numtyp4 kx; fetch4(kx,k,pos_tex);
|
|
int ktype=kx.w;
|
|
ktype=map[ktype];
|
|
int ikparam=elem2param[itype*nelements*nelements+ktype*nelements+ktype];
|
|
numtyp4 sw3_ikparam; fetch4(sw3_ikparam,ikparam,sw3_tex);
|
|
|
|
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;
|
|
|
|
if (rsq2 < sw3_ikparam.y) {
|
|
numtyp4 sw1_ikparam; fetch4(sw1_ikparam,ikparam,sw1_tex);
|
|
sw_sigma=sw1_ikparam.y;
|
|
sw_gamma=sw1_ikparam.w;
|
|
sw_sigma_gamma_ik=sw1_ikparam.y*sw1_ikparam.w; //sw_sigma*sw_gamma;
|
|
sw_cut_ik=sw3_ikparam.x;
|
|
|
|
int ijkparam=elem2param[itype*nelements*nelements+jtype*nelements+ktype];
|
|
numtyp4 sw1_ijkparam; fetch4(sw1_ijkparam,ijkparam,sw1_tex);
|
|
sw_epsilon=sw1_ijkparam.x;
|
|
sw_lambda=sw1_ijkparam.z;
|
|
sw_lambda_epsilon_ijk=sw1_ijkparam.x*sw1_ijkparam.z; //sw_lambda*sw_epsilon;
|
|
sw_lambda_epsilon2_ijk=(numtyp)2.0*sw_lambda_epsilon_ijk;
|
|
numtyp4 sw3_ijkparam; fetch4(sw3_ijkparam,ijkparam,sw3_tex);
|
|
sw_costheta_ijk=sw3_ijkparam.z;
|
|
|
|
numtyp fjx, fjy, fjz, fkx, fky, fkz;
|
|
threebody(delr1x,delr1y,delr1z,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;
|
|
#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);
|
|
#endif
|
|
} // if ii
|
|
}
|
|
|