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89 lines
3.4 KiB
89 lines
3.4 KiB
2 years ago
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/*****************************************************************************
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Copyright (c) 2014, Intel Corp.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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THE POSSIBILITY OF SUCH DAMAGE.
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******************************************************************************
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* Contents: Native C interface to LAPACK utility function
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* Author: Intel Corporation
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*****************************************************************************/
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#include "lapacke_utils.h"
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/* Converts input RFP matrix from row-major(C) to column-major(Fortran)
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* layout or vice versa.
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* This functions does copy diagonal for both unit and non-unit cases.
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*/
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void LAPACKE_dtf_trans( int matrix_layout, char transr, char uplo, char diag,
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lapack_int n, const double *in,
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double *out )
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{
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lapack_int row, col;
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lapack_logical rowmaj, ntr, lower, unit;
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if( in == NULL || out == NULL ) return ;
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rowmaj = (matrix_layout == LAPACK_ROW_MAJOR);
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ntr = LAPACKE_lsame( transr, 'n' );
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lower = LAPACKE_lsame( uplo, 'l' );
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unit = LAPACKE_lsame( diag, 'u' );
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if( ( !rowmaj && ( matrix_layout != LAPACK_COL_MAJOR ) ) ||
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( !ntr && !LAPACKE_lsame( transr, 't' ) &&
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!LAPACKE_lsame( transr, 'c' ) ) ||
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( !lower && !LAPACKE_lsame( uplo, 'u' ) ) ||
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( !unit && !LAPACKE_lsame( diag, 'n' ) ) ) {
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/* Just exit if input parameters are wrong */
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return;
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}
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/* Determine parameters of array representing RFP */
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if( ntr ) {
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if( n%2 == 0 ) {
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row = n + 1;
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col = n / 2;
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} else {
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row = n;
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col = (n + 1) / 2;
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}
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} else {
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if( n%2 == 0 ) {
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row = n / 2;
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col = n + 1;
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} else {
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row = (n + 1) / 2;
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col = n;
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}
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}
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/* Perform conversion: */
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if( rowmaj ) {
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LAPACKE_dge_trans( LAPACK_ROW_MAJOR, row, col, in, col, out, row );
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} else {
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LAPACKE_dge_trans( LAPACK_COL_MAJOR, row, col, in, row, out, col );
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}
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}
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