lapacke_dtgsyl.c

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* Contents: Native high-level C interface to LAPACK function dtgsyl
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_dtgsyl( int matrix_layout, char trans, lapack_int ijob,
                           lapack_int m, lapack_int n, const double* a,
                           lapack_int lda, const double* b, lapack_int ldb,
                           double* c, lapack_int ldc, const double* d,
                           lapack_int ldd, const double* e, lapack_int lde,
                           double* f, lapack_int ldf, double* scale,
                           double* dif )
{
    lapack_int info = 0;
    lapack_int lwork = -1;
    lapack_int* iwork = NULL;
    double* work = NULL;
    double work_query;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dtgsyl", -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, m, a, lda ) ) {
            return -6;
        }
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, b, ldb ) ) {
            return -8;
        }
        if( LAPACKE_dge_nancheck( matrix_layout, m, n, c, ldc ) ) {
            return -10;
        }
        if( LAPACKE_dge_nancheck( matrix_layout, m, m, d, ldd ) ) {
            return -12;
        }
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, e, lde ) ) {
            return -14;
        }
        if( LAPACKE_dge_nancheck( matrix_layout, m, n, f, ldf ) ) {
            return -16;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,m+n+6) );
    if( iwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Query optimal working array(s) size */
    info = LAPACKE_dtgsyl_work( matrix_layout, trans, ijob, m, n, a, lda, b, ldb,
                                c, ldc, d, ldd, e, lde, f, ldf, scale, dif,
                                &work_query, lwork, iwork );
    if( info != 0 ) {
        goto exit_level_1;
    }
    lwork = (lapack_int)work_query;
    /* Allocate memory for work arrays */
    work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dtgsyl_work( matrix_layout, trans, ijob, m, n, a, lda, b, ldb,
                                c, ldc, d, ldd, e, lde, f, ldf, scale, dif,
                                work, lwork, iwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    LAPACKE_free( iwork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dtgsyl", info );
    }
    return info;
}