215 lines
3.7 KiB
C++
215 lines
3.7 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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//
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// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
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// Copyright 2008-2016 National ICT Australia (NICTA)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ------------------------------------------------------------------------
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//! \addtogroup op_dotext
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//! @{
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template<typename eT>
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inline
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eT
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op_dotext::direct_rowvec_mat_colvec
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(
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const eT* A_mem,
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const Mat<eT>& B,
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const eT* C_mem
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)
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{
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arma_debug_sigprint();
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const uword cost_AB = B.n_cols;
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const uword cost_BC = B.n_rows;
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if(cost_AB <= cost_BC)
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{
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podarray<eT> tmp(B.n_cols);
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for(uword col=0; col<B.n_cols; ++col)
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{
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const eT* B_coldata = B.colptr(col);
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eT val = eT(0);
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for(uword i=0; i<B.n_rows; ++i)
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{
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val += A_mem[i] * B_coldata[i];
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}
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tmp[col] = val;
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}
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return op_dot::direct_dot(B.n_cols, tmp.mem, C_mem);
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}
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else
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{
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podarray<eT> tmp(B.n_rows);
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for(uword row=0; row<B.n_rows; ++row)
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{
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eT val = eT(0);
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for(uword col=0; col<B.n_cols; ++col)
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{
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val += B.at(row,col) * C_mem[col];
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}
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tmp[row] = val;
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}
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return op_dot::direct_dot(B.n_rows, A_mem, tmp.mem);
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}
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}
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template<typename eT>
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inline
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eT
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op_dotext::direct_rowvec_transmat_colvec
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(
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const eT* A_mem,
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const Mat<eT>& B,
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const eT* C_mem
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)
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{
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arma_debug_sigprint();
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const uword cost_AB = B.n_rows;
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const uword cost_BC = B.n_cols;
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if(cost_AB <= cost_BC)
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{
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podarray<eT> tmp(B.n_rows);
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for(uword row=0; row<B.n_rows; ++row)
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{
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eT val = eT(0);
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for(uword i=0; i<B.n_cols; ++i)
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{
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val += A_mem[i] * B.at(row,i);
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}
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tmp[row] = val;
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}
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return op_dot::direct_dot(B.n_rows, tmp.mem, C_mem);
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}
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else
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{
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podarray<eT> tmp(B.n_cols);
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for(uword col=0; col<B.n_cols; ++col)
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{
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const eT* B_coldata = B.colptr(col);
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eT val = eT(0);
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for(uword i=0; i<B.n_rows; ++i)
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{
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val += B_coldata[i] * C_mem[i];
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}
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tmp[col] = val;
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}
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return op_dot::direct_dot(B.n_cols, A_mem, tmp.mem);
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}
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}
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template<typename eT>
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inline
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eT
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op_dotext::direct_rowvec_diagmat_colvec
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(
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const eT* A_mem,
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const Mat<eT>& B,
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const eT* C_mem
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)
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{
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arma_debug_sigprint();
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eT val = eT(0);
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for(uword i=0; i<B.n_rows; ++i)
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{
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val += A_mem[i] * B.at(i,i) * C_mem[i];
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}
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return val;
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}
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template<typename eT>
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inline
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eT
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op_dotext::direct_rowvec_invdiagmat_colvec
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(
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const eT* A_mem,
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const Mat<eT>& B,
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const eT* C_mem
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)
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{
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arma_debug_sigprint();
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eT val = eT(0);
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for(uword i=0; i<B.n_rows; ++i)
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{
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val += (A_mem[i] * C_mem[i]) / B.at(i,i);
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}
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return val;
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}
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template<typename eT>
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inline
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eT
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op_dotext::direct_rowvec_invdiagvec_colvec
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(
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const eT* A_mem,
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const Mat<eT>& B,
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const eT* C_mem
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)
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{
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arma_debug_sigprint();
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const eT* B_mem = B.mem;
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eT val = eT(0);
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for(uword i=0; i<B.n_elem; ++i)
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{
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val += (A_mem[i] * C_mem[i]) / B_mem[i];
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}
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return val;
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}
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//! @}
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