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Diffstat (limited to 'src/armadillo/include/armadillo_bits/op_shift_meat.hpp')
| -rw-r--r-- | src/armadillo/include/armadillo_bits/op_shift_meat.hpp | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/armadillo/include/armadillo_bits/op_shift_meat.hpp b/src/armadillo/include/armadillo_bits/op_shift_meat.hpp new file mode 100644 index 0000000..b369b5d --- /dev/null +++ b/src/armadillo/include/armadillo_bits/op_shift_meat.hpp @@ -0,0 +1,181 @@ +// SPDX-License-Identifier: Apache-2.0 +// +// 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_shift +//! @{ + + + +template<typename T1> +inline +void +op_shift_vec::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_shift_vec>& in) + { + arma_extra_debug_sigprint(); + + typedef typename T1::elem_type eT; + + const quasi_unwrap<T1> U(in.m); + + const uword len = in.aux_uword_a; + const uword neg = in.aux_uword_b; + + const uword dim = (T1::is_xvec) ? uword(U.M.is_rowvec() ? 1 : 0) : uword((T1::is_row) ? 1 : 0); + + if(U.is_alias(out)) + { + Mat<eT> tmp; + + op_shift::apply_noalias(tmp, U.M, len, neg, dim); + + out.steal_mem(tmp); + } + else + { + op_shift::apply_noalias(out, U.M, len, neg, dim); + } + } + + + +template<typename eT> +inline +void +op_shift::apply_noalias(Mat<eT>& out, const Mat<eT>& X, const uword len, const uword neg, const uword dim) + { + arma_extra_debug_sigprint(); + + arma_debug_check_bounds( ((dim == 0) && (len >= X.n_rows)), "shift(): shift amount out of bounds" ); + arma_debug_check_bounds( ((dim == 1) && (len >= X.n_cols)), "shift(): shift amount out of bounds" ); + + out.copy_size(X); + + const uword X_n_rows = X.n_rows; + const uword X_n_cols = X.n_cols; + + if(dim == 0) + { + if(neg == 0) + { + for(uword col=0; col < X_n_cols; ++col) + { + eT* out_ptr = out.colptr(col); + const eT* X_ptr = X.colptr(col); + + for(uword out_row=len, row=0; row < (X_n_rows - len); ++row, ++out_row) + { + out_ptr[out_row] = X_ptr[row]; + } + + for(uword out_row=0, row=(X_n_rows - len); row < X_n_rows; ++row, ++out_row) + { + out_ptr[out_row] = X_ptr[row]; + } + } + } + else + if(neg == 1) + { + for(uword col=0; col < X_n_cols; ++col) + { + eT* out_ptr = out.colptr(col); + const eT* X_ptr = X.colptr(col); + + for(uword out_row=0, row=len; row < X_n_rows; ++row, ++out_row) + { + out_ptr[out_row] = X_ptr[row]; + } + + for(uword out_row=(X_n_rows-len), row=0; row < len; ++row, ++out_row) + { + out_ptr[out_row] = X_ptr[row]; + } + } + } + } + else + if(dim == 1) + { + if(neg == 0) + { + if(X_n_rows == 1) + { + eT* out_ptr = out.memptr(); + const eT* X_ptr = X.memptr(); + + for(uword out_col=len, col=0; col < (X_n_cols - len); ++col, ++out_col) + { + out_ptr[out_col] = X_ptr[col]; + } + + for(uword out_col=0, col=(X_n_cols - len); col < X_n_cols; ++col, ++out_col) + { + out_ptr[out_col] = X_ptr[col]; + } + } + else + { + for(uword out_col=len, col=0; col < (X_n_cols - len); ++col, ++out_col) + { + arrayops::copy( out.colptr(out_col), X.colptr(col), X_n_rows ); + } + + for(uword out_col=0, col=(X_n_cols - len); col < X_n_cols; ++col, ++out_col) + { + arrayops::copy( out.colptr(out_col), X.colptr(col), X_n_rows ); + } + } + } + else + if(neg == 1) + { + if(X_n_rows == 1) + { + eT* out_ptr = out.memptr(); + const eT* X_ptr = X.memptr(); + + for(uword out_col=0, col=len; col < X_n_cols; ++col, ++out_col) + { + out_ptr[out_col] = X_ptr[col]; + } + + for(uword out_col=(X_n_cols-len), col=0; col < len; ++col, ++out_col) + { + out_ptr[out_col] = X_ptr[col]; + } + } + else + { + for(uword out_col=0, col=len; col < X_n_cols; ++col, ++out_col) + { + arrayops::copy( out.colptr(out_col), X.colptr(col), X_n_rows ); + } + + for(uword out_col=(X_n_cols-len), col=0; col < len; ++col, ++out_col) + { + arrayops::copy( out.colptr(out_col), X.colptr(col), X_n_rows ); + } + } + } + } + } + + + +//! @} |