87 lines
3.8 KiB
C
87 lines
3.8 KiB
C
/*****************************************************************************
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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 middle-level C interface to LAPACK function dgeqrf
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* Author: Intel Corporation
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*****************************************************************************/
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#include "lapacke_utils.h"
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lapack_int LAPACKE_dgeqrf_work( int matrix_layout, lapack_int m, lapack_int n,
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double* a, lapack_int lda, double* tau,
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double* work, lapack_int lwork )
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{
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lapack_int info = 0;
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if( matrix_layout == LAPACK_COL_MAJOR ) {
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/* Call LAPACK function and adjust info */
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LAPACK_dgeqrf( &m, &n, a, &lda, tau, work, &lwork, &info );
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if( info < 0 ) {
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info = info - 1;
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}
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} else if( matrix_layout == LAPACK_ROW_MAJOR ) {
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lapack_int lda_t = MAX(1,m);
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double* a_t = NULL;
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/* Check leading dimension(s) */
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if( lda < n ) {
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info = -5;
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LAPACKE_xerbla( "LAPACKE_dgeqrf_work", info );
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return info;
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}
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/* Query optimal working array(s) size if requested */
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if( lwork == -1 ) {
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LAPACK_dgeqrf( &m, &n, a, &lda_t, tau, work, &lwork, &info );
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return (info < 0) ? (info - 1) : info;
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}
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/* Allocate memory for temporary array(s) */
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a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
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if( a_t == NULL ) {
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info = LAPACK_TRANSPOSE_MEMORY_ERROR;
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goto exit_level_0;
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}
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/* Transpose input matrices */
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LAPACKE_dge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
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/* Call LAPACK function and adjust info */
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LAPACK_dgeqrf( &m, &n, a_t, &lda_t, tau, work, &lwork, &info );
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if( info < 0 ) {
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info = info - 1;
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}
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/* Transpose output matrices */
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LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
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/* Release memory and exit */
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LAPACKE_free( a_t );
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exit_level_0:
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if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
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LAPACKE_xerbla( "LAPACKE_dgeqrf_work", info );
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}
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} else {
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info = -1;
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LAPACKE_xerbla( "LAPACKE_dgeqrf_work", info );
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}
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return info;
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}
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