100 lines
4.3 KiB
C
100 lines
4.3 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 high-level C interface to LAPACK function dorcsd2by1
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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_dorcsd2by1( int matrix_layout, char jobu1, char jobu2,
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char jobv1t, lapack_int m, lapack_int p, lapack_int q,
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double* x11, lapack_int ldx11, double* x21, lapack_int ldx21,
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double* theta, double* u1, lapack_int ldu1, double* u2,
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lapack_int ldu2, double* v1t, lapack_int ldv1t )
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{
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lapack_int info = 0;
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lapack_int lwork = -1;
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lapack_int* iwork = NULL;
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double* work = NULL;
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double work_query;
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lapack_int nrows_x11, nrows_x21;
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if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
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LAPACKE_xerbla( "LAPACKE_dorcsd2by1", -1 );
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return -1;
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}
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#ifndef LAPACK_DISABLE_NAN_CHECK
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if( LAPACKE_get_nancheck() ) {
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/* Optionally check input matrices for NaNs */
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nrows_x11 = p;
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nrows_x21 = m-p;
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if( LAPACKE_dge_nancheck( matrix_layout, nrows_x11, q, x11, ldx11 ) ) {
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return -8;
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}
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if( LAPACKE_dge_nancheck( matrix_layout, nrows_x21, q, x21, ldx21 ) ) {
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return -9;
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}
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}
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#endif
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/* Allocate memory for working array(s) */
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iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,m-MIN(MIN(p,m-p),MIN(q,m-q))) );
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if( iwork == NULL ) {
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info = LAPACK_WORK_MEMORY_ERROR;
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goto exit_level_0;
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}
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/* Query optimal working array(s) size */
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info = LAPACKE_dorcsd2by1_work( matrix_layout, jobu1, jobu2, jobv1t, m, p, q,
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x11, ldx11, x21, ldx21, theta, u1, ldu1, u2,
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ldu2, v1t, ldv1t, &work_query,
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lwork, iwork );
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if( info != 0 ) {
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goto exit_level_1;
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}
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lwork = (lapack_int)work_query;
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/* Allocate memory for work arrays */
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work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
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if( work == NULL ) {
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info = LAPACK_WORK_MEMORY_ERROR;
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goto exit_level_1;
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}
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/* Call middle-level interface */
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info = LAPACKE_dorcsd2by1_work( matrix_layout, jobu1, jobu2, jobv1t, m, p, q,
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x11, ldx11, x21, ldx21, theta, u1, ldu1, u2,
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ldu2, v1t, ldv1t, work, lwork, iwork );
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/* Release memory and exit */
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LAPACKE_free( work );
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exit_level_1:
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LAPACKE_free( iwork );
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exit_level_0:
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if( info == LAPACK_WORK_MEMORY_ERROR ) {
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LAPACKE_xerbla( "LAPACKE_dorcsd2by1", info );
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}
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return info;
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}
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