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

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* Contents: Native high-level C interface to LAPACK function dtgsja
* Author: Intel Corporation
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_dtgsja( int matrix_layout, char jobu, char jobv, char jobq,
                           lapack_int m, lapack_int p, lapack_int n,
                           lapack_int k, lapack_int l, double* a,
                           lapack_int lda, double* b, lapack_int ldb,
                           double tola, double tolb, double* alpha,
                           double* beta, double* u, lapack_int ldu, double* v,
                           lapack_int ldv, double* q, lapack_int ldq,
                           lapack_int* ncycle )
{
    lapack_int info = 0;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dtgsja", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_dge_nancheck( matrix_layout, m, n, a, lda ) ) {
            return -10;
        }
        if( LAPACKE_dge_nancheck( matrix_layout, p, n, b, ldb ) ) {
            return -12;
        }
        if( LAPACKE_lsame( jobq, 'i' ) || LAPACKE_lsame( jobq, 'q' ) ) {
            if( LAPACKE_dge_nancheck( matrix_layout, n, n, q, ldq ) ) {
                return -22;
            }
        }
        if( LAPACKE_d_nancheck( 1, &tola, 1 ) ) {
            return -14;
        }
        if( LAPACKE_d_nancheck( 1, &tolb, 1 ) ) {
            return -15;
        }
        if( LAPACKE_lsame( jobu, 'i' ) || LAPACKE_lsame( jobu, 'u' ) ) {
            if( LAPACKE_dge_nancheck( matrix_layout, m, m, u, ldu ) ) {
                return -18;
            }
        }
        if( LAPACKE_lsame( jobv, 'i' ) || LAPACKE_lsame( jobv, 'v' ) ) {
            if( LAPACKE_dge_nancheck( matrix_layout, p, p, v, ldv ) ) {
                return -20;
            }
        }
    }
#endif
    /* Allocate memory for working array(s) */
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,2*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_dtgsja_work( matrix_layout, jobu, jobv, jobq, m, p, n, k, l,
                                a, lda, b, ldb, tola, tolb, alpha, beta, u, ldu,
                                v, ldv, q, ldq, work, ncycle );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dtgsja", info );
    }
    return info;
}