ICODE-ADC/lammps
4
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add shfl_xor sum to kernel for ARCH>=300

Browse Source
This commit is contained in:
Vsevak
2019-11-12 21:35:36 +03:00
parent 64bdc59623
commit f803ba5655
1 changed files with 15 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
lib/gpu/lal_lj_tip4p_long.cu
View File

@ -472,6 +472,7 @@ __kernel void k_lj_tip4p_long(const __global numtyp4 *restrict x_,
} // if cut_coulsqplus
} // for nbor
if (t_per_atom>1) {
#if (ARCH < 300)
__local acctyp red_acc[6][BLOCK_PAIR];
red_acc[0][tid]=fO.x;
red_acc[1][tid]=fO.y;
@ -497,6 +498,20 @@ __kernel void k_lj_tip4p_long(const __global numtyp4 *restrict x_,
}
for (int r=0; r<6; r++) vO[r]=red_acc[r][tid];
}
#else
for (unsigned int s=t_per_atom/2; s>0; s>>=1) {
fO.x += shfl_xor(fO.x, s, t_per_atom);
fO.y += shfl_xor(fO.y, s, t_per_atom);
fO.z += shfl_xor(fO.z, s, t_per_atom);
fO.w += shfl_xor(fO.w, s, t_per_atom);
}
if (vflag>0) {
for (unsigned int s=t_per_atom/2; s>0; s>>=1) {
for (int r=0; r<6; r++)
vO[r] += shfl_xor(vO[r], s, t_per_atom);
}
}
#endif
}
if(offset == 0) {
ansO[i] = fO;