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tweak to functor implementing gemm #1810

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Aug 23, 2024
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tweak to functor implementing gemm #1810

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22 changes: 18 additions & 4 deletions dpctl/tensor/libtensor/include/kernels/linalg_functions/gemm.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -970,6 +970,7 @@ class GemmBatchFunctorThreadNM_vecm
size_t i = block_i * wg_delta_n * wi_delta_n;
size_t j = block_j * wg_delta_m * wi_total_delta_m;

using slmA_t = typename LocAccT1::value_type;
using slmB_t = typename LocAccT2::value_type;

const size_t a_st0 = k;
Expand Down Expand Up @@ -1057,16 +1058,29 @@ class GemmBatchFunctorThreadNM_vecm
const std::uint32_t lo_lhs_st_k = (wg_delta_n * wi_delta_n);
const std::uint32_t lo_rhs_rk_k = (wg_delta_m * wi_delta_m_vecs);
for (std::uint32_t pr_k = 0; pr_k < wi_delta_k; ++pr_k) {
std::array<slmA_t, wi_delta_n> pr_lhs{};
#pragma unroll
for (std::uint32_t pr_i = 0; pr_i < wi_delta_n; ++pr_i) {
pr_lhs[pr_i] =
local_lhs_block[pr_k * lo_lhs_st_k +
(local_i + pr_i * wg_delta_n)];
}

std::array<slmB_t, wi_delta_m_vecs> pr_rhs{};
#pragma unroll
for (std::uint32_t pr_j = 0; pr_j < wi_delta_m_vecs; ++pr_j) {
pr_rhs[pr_j] =
local_rhs_block[pr_k * lo_rhs_rk_k +
(local_j + pr_j * wg_delta_m)];
}

#pragma unroll
for (std::uint32_t pr_i = 0; pr_i < wi_delta_n; ++pr_i) {
#pragma unroll
for (std::uint32_t pr_j = 0; pr_j < wi_delta_m_vecs; ++pr_j)
{
private_C[pr_i * wi_delta_m_vecs + pr_j] +=
local_lhs_block[pr_k * lo_lhs_st_k +
(local_i + pr_i * wg_delta_n)] *
local_rhs_block[pr_k * lo_rhs_rk_k +
(local_j + pr_j * wg_delta_m)];
pr_lhs[pr_i] * pr_rhs[pr_j];
}
}
}
Expand Down
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