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revert Add/SubTimesI and prefetching in stencil

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This reverts commit 9b2699226c.
This commit is contained in:
nmeyer-ur
2020-06-08 12:02:53 +02:00
parent 93a37c8f68
commit 433766ac62
7 changed files with 83 additions and 344 deletions
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19
Grid/stencil/Stencil.h
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@ -68,27 +68,8 @@ void Gather_plane_simple_table (Vector<std::pair<int,int> >& table,const Lattice
int num=table.size();
std::pair<int,int> *table_v = & table[0];
auto rhs_v = rhs.View();
// main loop
accelerator_forNB( i,num, vobj::Nsimd(), {
typedef decltype(coalescedRead(buffer[0])) compressed_t;
// prefetching:
// +1% performance for Wilson on 32**4
// -2% performance for DW on 24**4 x 12
const int dist = 7;
if (i+dist < num){
svbool_t pg1 = svptrue_b64();
// prefetch input
auto in = rhs_v(so+table_v[i+dist].second);
svprfd(pg1, (char*)&in, SV_PLDL2STRM);
// prefetch store buffer
uint64_t o = table_v[i+dist].first;
svprfd(pg1, (char*)&buffer[off+o], SV_PSTL2STRM);
}
compressed_t tmp_c;
uint64_t o = table_v[i].first;
compress.Compress(&tmp_c,0,rhs_v(so+table_v[i].second));