OpenBLAS/lapack-netlib/LAPACKE/src/lapacke_sorgtsqr_row_work.c

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* Contents: Native middle-level C interface to LAPACK function sorgtsqr_row
* Author: Intel Corporation
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_sorgtsqr_row_work( int matrix_layout, lapack_int m, lapack_int n,
                                      lapack_int mb, lapack_int nb,
                                      float* a, lapack_int lda,
                                      const float* t, lapack_int ldt,
                                      float* work, lapack_int lwork )
{
    lapack_int info = 0;
    if (matrix_layout == LAPACK_COL_MAJOR) {
        /* Call LAPACK function and adjust info */
        LAPACK_sorgtsqr_row( &m, &n, &mb, &nb, a, &lda, t, &ldt,
                             work, &lwork, &info);
        if (info < 0) {
            info = info - 1;
        }
    } else if (matrix_layout == LAPACK_ROW_MAJOR) {
        lapack_int lda_t = MAX(1,m);
        float* a_t = NULL;
        /* Check leading dimension(s) */
        if( lda < n ) {
            info = -7;
            LAPACKE_xerbla( "LAPACKE_sorgtsqr_row_work", info );
            return info;
        }
        lapack_int ldt_t = MAX(1,nb);
        float* t_t = NULL;
        /* Check leading dimension(s) */
        if( ldt < n ) {
            info = -9;
            LAPACKE_xerbla( "LAPACKE_sorgtsqr_row_work", info );
            return info;
        }
        /* Query optimal working array(s) size if requested */
        if( lwork == -1 ) {
            LAPACK_sorgtsqr_row( &m, &n, &mb, &nb, a, &lda_t, t, &ldt_t,
                                 work, &lwork, &info );
            return (info < 0) ? (info - 1) : info;
        }
        /* Allocate memory for temporary array(s) */
        a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
        if( a_t == NULL ) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_0;
        }
        t_t = (float*)LAPACKE_malloc( sizeof(float) * ldt_t * MAX(1,n) );
        if( t_t == NULL ) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_1;
        }
        /* Transpose input matrices */
        LAPACKE_sge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
        LAPACKE_sge_trans( matrix_layout, nb, n, a, lda, t_t, ldt_t );
        /* Call LAPACK function and adjust info */
        LAPACK_sorgtsqr_row( &m, &n, &mb, &nb, a_t, &lda_t, t_t, &ldt_t,
                             work, &lwork, &info );
        if( info < 0 ) {
            info = info - 1;
        }
        /* Transpose output matrices */
        LAPACKE_sge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );

        /* Release memory and exit */
        LAPACKE_free( t_t );
exit_level_1:
        LAPACKE_free( a_t );
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_sorgtsqr_row_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_sorgtsqr_row_work", info );
    }
    return info;
}