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armadillo-code/include/armadillo_bits/op_htrans_meat.hpp
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// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
//! \addtogroup op_htrans
//! @{
template<typename eT>
arma_inline
void
op_htrans::apply_mat_noalias(Mat<eT>& out, const Mat<eT>& A, const typename arma_not_cx<eT>::result* junk)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
op_strans::apply_mat_noalias(out, A);
}
template<typename eT>
arma_hot
inline
void
op_htrans::apply_mat_noalias(Mat<eT>& out, const Mat<eT>& A, const typename arma_cx_only<eT>::result* junk)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
const uword A_n_rows = A.n_rows;
const uword A_n_cols = A.n_cols;
out.set_size(A_n_cols, A_n_rows);
if( (A_n_cols == 1) || (A_n_rows == 1) )
{
const uword n_elem = A.n_elem;
const eT* A_mem = A.memptr();
eT* out_mem = out.memptr();
for(uword i=0; i < n_elem; ++i)
{
out_mem[i] = std::conj(A_mem[i]);
}
}
else
if( (A_n_rows >= 512) && (A_n_cols >= 512) )
{
op_htrans::apply_mat_noalias_large(out, A);
}
else
{
eT* outptr = out.memptr();
for(uword k=0; k < A_n_rows; ++k)
{
const eT* Aptr = &(A.at(k,0));
for(uword j=0; j < A_n_cols; ++j)
{
(*outptr) = std::conj(*Aptr);
Aptr += A_n_rows;
outptr++;
}
}
}
}
template<typename T>
arma_hot
inline
void
op_htrans::block_worker(std::complex<T>* Y, const std::complex<T>* X, const uword X_n_rows, const uword Y_n_rows, const uword n_rows, const uword n_cols)
{
for(uword row = 0; row < n_rows; ++row)
{
const uword Y_offset = row * Y_n_rows;
for(uword col = 0; col < n_cols; ++col)
{
const uword X_offset = col * X_n_rows;
Y[col + Y_offset] = std::conj(X[row + X_offset]);
}
}
}
template<typename T>
arma_hot
inline
void
op_htrans::apply_mat_noalias_large(Mat< std::complex<T> >& out, const Mat< std::complex<T> >& A)
{
arma_extra_debug_sigprint();
const uword n_rows = A.n_rows;
const uword n_cols = A.n_cols;
const uword block_size = 64;
const uword n_rows_base = block_size * (n_rows / block_size);
const uword n_cols_base = block_size * (n_cols / block_size);
const uword n_rows_extra = n_rows - n_rows_base;
const uword n_cols_extra = n_cols - n_cols_base;
const std::complex<T>* X = A.memptr();
std::complex<T>* Y = out.memptr();
for(uword row = 0; row < n_rows_base; row += block_size)
{
const uword Y_offset = row * n_cols;
for(uword col = 0; col < n_cols_base; col += block_size)
{
const uword X_offset = col * n_rows;
op_htrans::block_worker(&Y[col + Y_offset], &X[row + X_offset], n_rows, n_cols, block_size, block_size);
}
const uword X_offset = n_cols_base * n_rows;
op_htrans::block_worker(&Y[n_cols_base + Y_offset], &X[row + X_offset], n_rows, n_cols, block_size, n_cols_extra);
}
if(n_rows_extra == 0) { return; }
const uword Y_offset = n_rows_base * n_cols;
for(uword col = 0; col < n_cols_base; col += block_size)
{
const uword X_offset = col * n_rows;
op_htrans::block_worker(&Y[col + Y_offset], &X[n_rows_base + X_offset], n_rows, n_cols, n_rows_extra, block_size);
}
const uword X_offset = n_cols_base * n_rows;
op_htrans::block_worker(&Y[n_cols_base + Y_offset], &X[n_rows_base + X_offset], n_rows, n_cols, n_rows_extra, n_cols_extra);
}
template<typename eT>
arma_inline
void
op_htrans::apply_mat_inplace(Mat<eT>& out, const typename arma_not_cx<eT>::result* junk)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
op_strans::apply_mat_inplace(out);
}
template<typename eT>
arma_hot
inline
void
op_htrans::apply_mat_inplace(Mat<eT>& out, const typename arma_cx_only<eT>::result* junk)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
const uword n_rows = out.n_rows;
const uword n_cols = out.n_cols;
if(n_rows == n_cols)
{
arma_extra_debug_print("doing in-place hermitian transpose of a square matrix");
for(uword col=0; col < n_cols; ++col)
{
eT* coldata = out.colptr(col);
out.at(col,col) = std::conj( out.at(col,col) );
for(uword row=(col+1); row < n_rows; ++row)
{
const eT val1 = std::conj(coldata[row]);
const eT val2 = std::conj(out.at(col,row));
out.at(col,row) = val1;
coldata[row] = val2;
}
}
}
else
{
Mat<eT> tmp;
op_htrans::apply_mat_noalias(tmp, out);
out.steal_mem(tmp);
}
}
template<typename eT>
arma_inline
void
op_htrans::apply_mat(Mat<eT>& out, const Mat<eT>& A, const typename arma_not_cx<eT>::result* junk)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
op_strans::apply_mat(out, A);
}
template<typename eT>
arma_hot
inline
void
op_htrans::apply_mat(Mat<eT>& out, const Mat<eT>& A, const typename arma_cx_only<eT>::result* junk)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
if(&out != &A)
{
op_htrans::apply_mat_noalias(out, A);
}
else
{
op_htrans::apply_mat_inplace(out);
}
}
template<typename T1>
arma_hot
inline
void
op_htrans::apply_proxy(Mat<typename T1::elem_type>& out, const T1& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const Proxy<T1> P(X);
const uword n_rows = P.get_n_rows();
const uword n_cols = P.get_n_cols();
const bool is_alias = P.is_alias(out);
if( (resolves_to_vector<T1>::yes) && (Proxy<T1>::use_at == false) )
{
if(is_alias == false)
{
out.set_size(n_cols, n_rows);
eT* out_mem = out.memptr();
const uword n_elem = P.get_n_elem();
typename Proxy<T1>::ea_type Pea = P.get_ea();
for(uword i=0; i < n_elem; ++i)
{
out_mem[i] = std::conj(Pea[i]);
}
}
else // aliasing
{
Mat<eT> out2(n_cols, n_rows, arma_nozeros_indicator());
eT* out_mem = out2.memptr();
const uword n_elem = P.get_n_elem();
typename Proxy<T1>::ea_type Pea = P.get_ea();
for(uword i=0; i < n_elem; ++i)
{
out_mem[i] = std::conj(Pea[i]);
}
out.steal_mem(out2);
}
}
else
{
if(is_alias == false)
{
out.set_size(n_cols, n_rows);
eT* outptr = out.memptr();
for(uword k=0; k < n_rows; ++k)
{
for(uword j=0; j < n_cols; ++j)
{
(*outptr) = std::conj(P.at(k,j));
outptr++;
}
}
}
else // aliasing
{
Mat<eT> out2(n_cols, n_rows, arma_nozeros_indicator());
eT* out2ptr = out2.memptr();
for(uword k=0; k < n_rows; ++k)
{
for(uword j=0; j < n_cols; ++j)
{
(*out2ptr) = std::conj(P.at(k,j));
out2ptr++;
}
}
out.steal_mem(out2);
}
}
}
template<typename T1>
arma_hot
inline
void
op_htrans::apply_direct(Mat<typename T1::elem_type>& out, const T1& X)
{
arma_extra_debug_sigprint();
// allow detection of in-place transpose
if(is_Mat<T1>::value || is_Mat<typename Proxy<T1>::stored_type>::value || (arma_config::openmp && Proxy<T1>::use_mp))
{
const unwrap<T1> U(X);
op_htrans::apply_mat(out, U.M);
}
else
{
op_htrans::apply_proxy(out, X);
}
}
template<typename T1>
arma_hot
inline
void
op_htrans::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_htrans>& in, const typename arma_not_cx<typename T1::elem_type>::result* junk)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
op_strans::apply_direct(out, in.m);
}
template<typename T1>
arma_hot
inline
void
op_htrans::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_htrans>& in, const typename arma_cx_only<typename T1::elem_type>::result* junk)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
op_htrans::apply_direct(out, in.m);
}
//
// op_htrans2
template<typename T1>
inline
void
op_htrans2::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_htrans2>& in, const typename arma_not_cx<typename T1::elem_type>::result* junk)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
op_strans::apply_direct(out, in.m);
arrayops::inplace_mul(out.memptr(), in.aux, out.n_elem);
}
template<typename T1>
inline
void
op_htrans2::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_htrans2>& in, const typename arma_cx_only<typename T1::elem_type>::result* junk)
{
arma_extra_debug_sigprint();
arma_ignore(junk);
op_htrans::apply_direct(out, in.m);
arrayops::inplace_mul(out.memptr(), in.aux, out.n_elem);
}
//! @}