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Pack the stencil smaller for 128 bit access

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This commit is contained in:
Peter Boyle 2018-07-23 06:12:45 -04:00
parent 1fd08c21ac
commit da17a015c7
1 changed files with 13 additions and 6 deletions
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19
lib/stencil/Stencil.h
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@ -94,13 +94,20 @@ void Gather_plane_exchange_table(std::vector<std::pair<int,int> >& table,const L
}
struct StencilEntry {
uint64_t _offset;
uint64_t _byte_offset;
uint16_t _is_local;
uint16_t _permute;
uint16_t _around_the_world; //256 bits, 32 bytes, 1/2 cacheline
uint16_t _pad;
#ifdef GRID_NVCC
uint64_t _byte_offset; // 8 bytes
uint32_t _offset; // 8 bytes
#else
uint64_t _byte_offset; // 8 bytes
uint64_t _offset; // 4 bytes (8 ever required?)
#endif
uint8_t _is_local; // 1 bytes
uint8_t _permute; // 1 bytes
uint8_t _around_the_world; // 1 bytes
uint8_t _pad; // 1 bytes
};
// Could pack to 8 + 4 + 4 = 128 bit and use
template<class vobj,class cobj>
class CartesianStencilView {
public: