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/* Ergo, version 3.8, a program for linear scaling electronic structure
* calculations.
* Copyright (C) 2019 Elias Rudberg, Emanuel H. Rubensson, Pawel Salek,
* and Anastasia Kruchinina.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Primary academic reference:
* Ergo: An open-source program for linear-scaling electronic structure
* calculations,
* Elias Rudberg, Emanuel H. Rubensson, Pawel Salek, and Anastasia
* Kruchinina,
* SoftwareX 7, 107 (2018),
* <http://dx.doi.org/10.1016/j.softx.2018.03.005>
*
* For further information about Ergo, see <http://www.ergoscf.org>.
*/
/** @file gemm_sse.h
*
* @brief Generalized matrix matrix multiplication using SSE intrinsics.
*
* @author Emanuel H. Rubensson
* @date 2009
*
*/
#ifndef GEMM_SSE_H
#define GEMM_SSE_H
#include <stdexcept>
#include "mm_kernel_inner_sse2_A.h"
#include "mm_kernel_outer_A.h"
template<typename real, typename regType,
int m_kernel, int n_kernel, int k_kernel,
int m_block, int n_block>
static void gemm_sse(real const * const A,
real const * const B,
real * C,
size_t const m,
size_t const n,
size_t const k,
real * A_packed,
real * B_packed,
real * C_packed,
size_t const ap_size,
size_t const bp_size,
size_t const cp_size) {
// typedef double real; typedef __m128d regType;
// typedef float real; typedef __m128 regType;
typedef MM_kernel_inner_sse2_A<real, regType, m_kernel, n_kernel, k_kernel> MM_inner;
typedef MM_kernel_outer_A<MM_inner, m_block, n_block> MM_outer;
if (m != m_kernel*m_block)
throw std::runtime_error("Error in gemm_sse(...): m != m_kernel*m_block");
if (n != n_kernel*n_block)
throw std::runtime_error("Error in gemm_sse(...): n != n_kernel*n_block");
if (k != k_kernel)
throw std::runtime_error("Error in gemm_sse(...): k != k_kernel");
if (ap_size < MM_outer::Pack_type_A::size_packed)
throw std::runtime_error("Error in gemm_sse(...): "
"ap_size < MM_outer::Pack_type_A::size_packed");
if (bp_size < MM_outer::Pack_type_B::size_packed)
throw std::runtime_error("Error in gemm_sse(...): "
"bp_size < MM_outer::Pack_type_B::size_packed");
if (cp_size < MM_outer::Pack_type_C::size_packed)
throw std::runtime_error("Error in gemm_sse(...): "
"cp_size < MM_outer::Pack_type_C::size_packed");
MM_outer::Pack_type_C::template pack<Ordering_col_wise>( C, C_packed, m, n);
MM_outer::Pack_type_A::template pack<Ordering_col_wise>( A, A_packed, m, k);
MM_outer::Pack_type_B::template pack<Ordering_col_wise>( B, B_packed, k, n);
MM_outer::exec(&A_packed, &B_packed, C_packed);
MM_outer::Pack_type_C::template unpack<Ordering_col_wise>(C, C_packed, m, n);
}
template<typename real>
static void gemm_sse(real const * const A,
real const * const B,
real * C,
size_t const m,
size_t const n,
size_t const k,
real * A_packed,
real * B_packed,
real * C_packed,
size_t const ap_size,
size_t const bp_size,
size_t const cp_size) {
throw std::runtime_error("gemm_sse not implemented for chosen real type.");
}
template<>
void gemm_sse(double const * const A,
double const * const B,
double * C,
size_t const m,
size_t const n,
size_t const k,
double * A_packed,
double * B_packed,
double * C_packed,
size_t const ap_size,
size_t const bp_size,
size_t const cp_size) {
gemm_sse<double, __m128d, 4, 4, 32, 8, 8>
(A, B, C, m, n, k,
A_packed, B_packed, C_packed, ap_size, bp_size, cp_size);
}
template<>
void gemm_sse(float const * const A,
float const * const B,
float * C,
size_t const m,
size_t const n,
size_t const k,
float * A_packed,
float * B_packed,
float * C_packed,
size_t const ap_size,
size_t const bp_size,
size_t const cp_size) {
gemm_sse<float, __m128, 8, 4, 32, 4, 8>
(A, B, C, m, n, k,
A_packed, B_packed, C_packed, ap_size, bp_size, cp_size);
}
#endif
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