138 lines
3.1 KiB
C++
138 lines
3.1 KiB
C++
// Copyright (C) 2013 National ICT Australia (NICTA)
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// -------------------------------------------------------------------
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//
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// Written by Conrad Sanderson - http://conradsanderson.id.au
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//! \addtogroup glue_min
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//! @{
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template<typename eT, typename T1, typename T2>
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inline
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void
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glue_min::apply(Mat<eT>& out, const Proxy<T1>& PA, const Proxy<T2>& PB)
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{
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arma_extra_debug_sigprint();
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const uword n_rows = PA.get_n_rows();
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const uword n_cols = PA.get_n_cols();
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arma_debug_assert_same_size(n_rows, n_cols, PB.get_n_rows(), PB.get_n_cols(), "min(): given matrices must have the same size");
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out.set_size(n_rows, n_cols);
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eT* out_mem = out.memptr();
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if( (Proxy<T1>::prefer_at_accessor == false) && (Proxy<T2>::prefer_at_accessor == false) )
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{
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typename Proxy<T1>::ea_type A = PA.get_ea();
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typename Proxy<T2>::ea_type B = PB.get_ea();
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const uword N = PA.get_n_elem();
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for(uword i=0; i<N; ++i)
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{
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out_mem[i] = (std::min)(A[i], B[i]);
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}
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}
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else
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{
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for(uword col=0; col < n_cols; ++col)
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for(uword row=0; row < n_rows; ++row)
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{
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*out_mem = (std::min)( PA.at(row,col), PB.at(row,col) );
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++out_mem;
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}
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}
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}
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template<typename T, typename T1, typename T2>
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inline
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void
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glue_min::apply(Mat< std::complex<T> >& out, const Proxy<T1>& PA, const Proxy<T2>& PB)
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{
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arma_extra_debug_sigprint();
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typedef typename std::complex<T> eT;
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const uword n_rows = PA.get_n_rows();
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const uword n_cols = PA.get_n_cols();
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arma_debug_assert_same_size(n_rows, n_cols, PB.get_n_rows(), PB.get_n_cols(), "min(): given matrices must have the same size");
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out.set_size(n_rows, n_cols);
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eT* out_mem = out.memptr();
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if( (Proxy<T1>::prefer_at_accessor == false) && (Proxy<T2>::prefer_at_accessor == false) )
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{
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typename Proxy<T1>::ea_type A = PA.get_ea();
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typename Proxy<T2>::ea_type B = PB.get_ea();
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const uword N = PA.get_n_elem();
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for(uword i=0; i<N; ++i)
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{
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const eT A_val = A[i];
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const eT B_val = B[i];
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out_mem[i] = ( std::abs(A_val) < std::abs(B_val) ) ? A_val : B_val;
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}
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}
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else
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{
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for(uword col=0; col < n_cols; ++col)
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for(uword row=0; row < n_rows; ++row)
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{
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const eT A_val = PA.at(row,col);
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const eT B_val = PB.at(row,col);
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*out_mem = ( std::abs(A_val) < std::abs(B_val) ) ? A_val : B_val;
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++out_mem;
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}
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}
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}
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template<typename T1, typename T2>
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inline
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void
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glue_min::apply(Mat<typename T1::elem_type>& out, const Glue<T1, T2, glue_min>& X)
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{
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arma_extra_debug_sigprint();
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typedef typename T1::elem_type eT;
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const Proxy<T1> PA(X.A);
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const Proxy<T2> PB(X.B);
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if(PA.is_alias(out) || PB.is_alias(out))
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{
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Mat<eT> tmp;
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glue_min::apply(tmp, PA, PB);
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out.steal_mem(tmp);
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}
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else
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{
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glue_min::apply(out, PA, PB);
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}
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}
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//! @}
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