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Diffstat (limited to 'src/kernels/level3/xgemm_direct_part1.opencl')
| -rw-r--r-- | src/kernels/level3/xgemm_direct_part1.opencl | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/src/kernels/level3/xgemm_direct_part1.opencl b/src/kernels/level3/xgemm_direct_part1.opencl new file mode 100644 index 00000000..cb407824 --- /dev/null +++ b/src/kernels/level3/xgemm_direct_part1.opencl @@ -0,0 +1,294 @@ + +// ================================================================================================= +// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This +// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max- +// width of 100 characters per line. +// +// Author(s): +// Cedric Nugteren <www.cedricnugteren.nl> +// +// This is a generic GEMM kernel that works for all sizes and configurations: it doesn't require any +// pre and and post-processing kernels. +// +// This kernel is seperated into three files. This is part 1 out of 2. +// +// ================================================================================================= + +// Enables loading of this file using the C++ pre-processor's #include (C++11 standard raw string +// literal). Comment-out this line for syntax-highlighting when developing. +R"( + +// Parameters set by the tuner or by the database. Here they are given a basic default value in case +// this kernel file is used outside of the CLBlast library. Note that all parameters here have a +// suffix 'D' to denote that they are for the 'direct' version of the GEMM kernel. +#ifndef WGD + #define WGD 8 // Tile-size in dimension M, N, and K (e.g. 8, 16, 32, 64) +#endif +#ifndef MDIMCD + #define MDIMCD 8 // Threads per workgroup in M-dimension (e.g. 8, 16, 32) +#endif +#ifndef NDIMCD + #define NDIMCD 8 // Threads per workgroup in N-dimension (e.g. 8, 16, 32) +#endif +#ifndef MDIMAD + #define MDIMAD 8 // Re-shaped tile dimension of matrix A: KDIMAD * MDIMAD +#endif +#ifndef NDIMBD + #define NDIMBD 8 // Re-shaped tile dimension of matrix B: KDIMBD * NDIMBD +#endif +#ifndef KWID + #define KWID 1 // Unroll factor of the WGD loop (smaller or equal than WGD) +#endif +#ifndef VWMD + #define VWMD 1 // Vector width of matrices A and C +#endif +#ifndef VWND + #define VWND 1 // Vector width of matrix B +#endif +#ifndef PADA + #define PADA 1 // Local memory padding for matrix A +#endif +#ifndef PADB + #define PADB 1 // Local memory padding for matrix B +#endif + +// Helper parameters based on the above tuning parameters +#define MWID (WGD/MDIMCD) // Work per work-item (M-dimension) +#define NWID (WGD/NDIMCD) // Work per work-item (N-dimension) +#define KDIMAD ((MDIMCD*NDIMCD)/(MDIMAD)) // Re-shaped tile dimension of matrix A: KDIMAD * MDIMAD +#define KDIMBD ((MDIMCD*NDIMCD)/(NDIMBD)) // Re-shaped tile dimension of matrix B: KDIMBD * NDIMBD +#define MWAD (WGD/MDIMAD) // Amount of loads-per-thread for matrix A (M-dimension) +#define KWAD (WGD/KDIMAD) // Amount of loads-per-thread for matrix A (K-dimension) +#define KWBD (WGD/KDIMBD) // Amount of loads-per-thread for matrix B (K-dimension) +#define NWBD (WGD/NDIMBD) // Amount of loads-per-thread for matrix B (N-dimension) + +// ================================================================================================= + +// Data-widths in dimension M +#if VWMD == 1 + typedef real realMD; +#elif VWMD == 2 + typedef real2 realMD; +#elif VWMD == 4 + typedef real4 realMD; +#elif VWMD == 8 + typedef real8 realMD; +#elif VWMD == 16 + typedef real16 realMD; +#endif + +// Data-widths in dimension N +#if VWND == 1 + typedef real realND; +#elif VWND == 2 + typedef real2 realND; +#elif VWND == 4 + typedef real4 realND; +#elif VWND == 8 + typedef real8 realND; +#elif VWND == 16 + typedef real16 realND; +#endif + +// ================================================================================================= + +// Caches global off-chip memory into local (shared) memory on-chip. This function is specific for +// caching the A input matrix. +inline void GlobalToLocalDirectA(const __global realMD* restrict agm, __local real* alm, + const int a_ld, const int a_offset, const int kwg, + const int a_transpose, const int a_conjugate) { + #if MDIMCD == MDIMAD + const int la0 = get_local_id(0); + const int la1 = get_local_id(1); + #else + const int tid = get_local_id(0) + MDIMCD*get_local_id(1); + const int la0 = tid % MDIMAD; + const int la1 = tid / MDIMAD; + #endif + #pragma unroll + for (int mia=0; mia<MWAD/VWMD; ++mia) { + #pragma unroll + for (int kia=0; kia<KWAD; ++kia) { + + // Computes the indices for the global memory + int mg = mia + la0*(MWAD/VWMD); + int kg = kia + la1*KWAD; + int idm = (a_transpose) ? mg + kwg/VWMD : mg + GetGroupID0()*(WGD/VWMD); + int idk = (a_transpose) ? kg + GetGroupID0()*WGD : kg + kwg; + + // Loads the data from global memory into the local memory + const realMD avec = agm[idk*(a_ld/VWMD) + idm + a_offset]; + #if VWMD == 1 + alm[kg*(WGD + PADA) + mg] = avec; + #elif VWMD == 2 + alm[kg*(WGD + PADA) + mg*VWMD + 0] = avec.x; + alm[kg*(WGD + PADA) + mg*VWMD + 1] = avec.y; + #elif VWMD == 4 + alm[kg*(WGD + PADA) + mg*VWMD + 0] = avec.x; + alm[kg*(WGD + PADA) + mg*VWMD + 1] = avec.y; + alm[kg*(WGD + PADA) + mg*VWMD + 2] = avec.z; + alm[kg*(WGD + PADA) + mg*VWMD + 3] = avec.w; + #elif VWMD == 8 + alm[kg*(WGD + PADA) + mg*VWMD + 0] = avec.s0; + alm[kg*(WGD + PADA) + mg*VWMD + 1] = avec.s1; + alm[kg*(WGD + PADA) + mg*VWMD + 2] = avec.s2; + alm[kg*(WGD + PADA) + mg*VWMD + 3] = avec.s3; + alm[kg*(WGD + PADA) + mg*VWMD + 4] = avec.s4; + alm[kg*(WGD + PADA) + mg*VWMD + 5] = avec.s5; + alm[kg*(WGD + PADA) + mg*VWMD + 6] = avec.s6; + alm[kg*(WGD + PADA) + mg*VWMD + 7] = avec.s7; + #elif VWMD == 16 + alm[kg*(WGD + PADA) + mg*VWMD + 0] = avec.s0; + alm[kg*(WGD + PADA) + mg*VWMD + 1] = avec.s1; + alm[kg*(WGD + PADA) + mg*VWMD + 2] = avec.s2; + alm[kg*(WGD + PADA) + mg*VWMD + 3] = avec.s3; + alm[kg*(WGD + PADA) + mg*VWMD + 4] = avec.s4; + alm[kg*(WGD + PADA) + mg*VWMD + 5] = avec.s5; + alm[kg*(WGD + PADA) + mg*VWMD + 6] = avec.s6; + alm[kg*(WGD + PADA) + mg*VWMD + 7] = avec.s7; + alm[kg*(WGD + PADA) + mg*VWMD + 8] = avec.s8; + alm[kg*(WGD + PADA) + mg*VWMD + 9] = avec.s9; + alm[kg*(WGD + PADA) + mg*VWMD + 10] = avec.sA; + alm[kg*(WGD + PADA) + mg*VWMD + 11] = avec.sB; + alm[kg*(WGD + PADA) + mg*VWMD + 12] = avec.sC; + alm[kg*(WGD + PADA) + mg*VWMD + 13] = avec.sD; + alm[kg*(WGD + PADA) + mg*VWMD + 14] = avec.sE; + alm[kg*(WGD + PADA) + mg*VWMD + 15] = avec.sF; + #endif + if (a_conjugate) { + for (int vm=0; vm<VWMD; ++vm) { + COMPLEX_CONJUGATE(alm[kg*(WGD + PADA) + mg*VWMD + vm]); + } + } + } + } +} + +// Same as above, but now for the B input matrix +inline void GlobalToLocalDirectB(const __global realND* restrict bgm, __local real* blm, + const int b_ld, const int b_offset, const int kwg, + const int b_transpose, const int b_conjugate) { + #if MDIMCD == NDIMBD + const int lb0 = get_local_id(0); + const int lb1 = get_local_id(1); + #else + const int tid = get_local_id(0) + MDIMCD*get_local_id(1); + const int lb0 = tid % NDIMBD; + const int lb1 = tid / NDIMBD; + #endif + #pragma unroll + for (int kib=0; kib<KWBD; ++kib) { + #pragma unroll + for (int nib=0; nib<NWBD/VWND; ++nib) { + + // Computes the indices for the global memory + int ng = nib + lb0*(NWBD/VWND); + int kg = kib + lb1*KWBD; + int idn = (b_transpose) ? ng + kwg/VWND : ng + GetGroupID1()*(WGD/VWND); + int idk = (b_transpose) ? kg + GetGroupID1()*WGD : kg + kwg; + + // Loads the data from global memory into the local memory + const realND bvec = bgm[idk*(b_ld/VWND) + idn + b_offset]; + #if VWND == 1 + blm[kg*(WGD + PADB) + ng] = bvec; + #elif VWND == 2 + blm[kg*(WGD + PADB) + ng*VWND + 0] = bvec.x; + blm[kg*(WGD + PADB) + ng*VWND + 1] = bvec.y; + #elif VWND == 4 + blm[kg*(WGD + PADB) + ng*VWND + 0] = bvec.x; + blm[kg*(WGD + PADB) + ng*VWND + 1] = bvec.y; + blm[kg*(WGD + PADB) + ng*VWND + 2] = bvec.z; + blm[kg*(WGD + PADB) + ng*VWND + 3] = bvec.w; + #elif VWND == 8 + blm[kg*(WGD + PADB) + ng*VWND + 0] = bvec.s0; + blm[kg*(WGD + PADB) + ng*VWND + 1] = bvec.s1; + blm[kg*(WGD + PADB) + ng*VWND + 2] = bvec.s2; + blm[kg*(WGD + PADB) + ng*VWND + 3] = bvec.s3; + blm[kg*(WGD + PADB) + ng*VWND + 4] = bvec.s4; + blm[kg*(WGD + PADB) + ng*VWND + 5] = bvec.s5; + blm[kg*(WGD + PADB) + ng*VWND + 6] = bvec.s6; + blm[kg*(WGD + PADB) + ng*VWND + 7] = bvec.s7; + #elif VWND == 16 + blm[kg*(WGD + PADB) + ng*VWND + 0] = bvec.s0; + blm[kg*(WGD + PADB) + ng*VWND + 1] = bvec.s1; + blm[kg*(WGD + PADB) + ng*VWND + 2] = bvec.s2; + blm[kg*(WGD + PADB) + ng*VWND + 3] = bvec.s3; + blm[kg*(WGD + PADB) + ng*VWND + 4] = bvec.s4; + blm[kg*(WGD + PADB) + ng*VWND + 5] = bvec.s5; + blm[kg*(WGD + PADB) + ng*VWND + 6] = bvec.s6; + blm[kg*(WGD + PADB) + ng*VWND + 7] = bvec.s7; + blm[kg*(WGD + PADB) + ng*VWND + 8] = bvec.s8; + blm[kg*(WGD + PADB) + ng*VWND + 9] = bvec.s9; + blm[kg*(WGD + PADB) + ng*VWND + 10] = bvec.sA; + blm[kg*(WGD + PADB) + ng*VWND + 11] = bvec.sB; + blm[kg*(WGD + PADB) + ng*VWND + 12] = bvec.sC; + blm[kg*(WGD + PADB) + ng*VWND + 13] = bvec.sD; + blm[kg*(WGD + PADB) + ng*VWND + 14] = bvec.sE; + blm[kg*(WGD + PADB) + ng*VWND + 15] = bvec.sF; + #endif + if (b_conjugate) { + for (int vn=0; vn<VWND; ++vn) { + COMPLEX_CONJUGATE(blm[kg*(WGD + PADB) + ng*VWND + vn]); + } + } + } + } +} + +// ================================================================================================= + +// Caches on-chip local memory into per-thread private memory (registers). This function is specific +// for caching the A input matrix. +inline void LocalToPrivateDirectA(__local real* alm, real apm[MWID], const int kg, + const int a_transpose) { + #pragma unroll + for (int mi=0; mi<MWID; ++mi) { + const int mg = mi + get_local_id(0)*MWID; + const int index = (a_transpose) ? mg*(WGD + PADA) + kg : kg*(WGD + PADA) + mg; + apm[mi] = alm[index]; + } +} + +// Same as above, but now for the B input matrix +inline void LocalToPrivateDirectB(__local real* blm, real bpm[NWID], const int kg, + const int b_transpose) { + #pragma unroll + for (int ni=0; ni<NWID; ++ni) { + const int ng = ni + get_local_id(1)*NWID; + const int index = (b_transpose) ? ng*(WGD + PADB) + kg : kg*(WGD + PADB) + ng; + bpm[ni] = blm[index]; + } +} + +// ================================================================================================= + +// Initializes the accumulation registers to zero +inline void InitAccRegistersDirect(real cpm[NWID][MWID]) { + #pragma unroll + for (int mi=0; mi<MWID; ++mi) { + #pragma unroll + for (int ni=0; ni<NWID; ++ni) { + SetToZero(cpm[ni][mi]); + } + } +} + +// ================================================================================================= + +// Performs the actual computation: Cpm += Apm * Bpm +inline void MultiplyAccumulateDirect(real cpm[NWID][MWID], real apm[MWID], real bpm[NWID]) { + #pragma unroll + for (int ni=0; ni<NWID; ++ni) { + #pragma unroll + for (int mi=0; mi<MWID; ++mi) { + MultiplyAdd(cpm[ni][mi], apm[mi], bpm[ni]); + } + } +} + +// ================================================================================================= + +// End of the C++11 raw string literal +)" + +// ================================================================================================= |