lapacke_zggbal_work.c

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* Contents: Native middle-level C interface to LAPACK function zggbal
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_zggbal_work( int matrix_layout, char job, lapack_int n,
                                lapack_complex_double* a, lapack_int lda,
                                lapack_complex_double* b, lapack_int ldb,
                                lapack_int* ilo, lapack_int* ihi,
                                double* lscale, double* rscale, double* work )
{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_zggbal( &job, &n, a, &lda, b, &ldb, ilo, ihi, lscale, rscale,
                       work, &info );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int lda_t = MAX(1,n);
        lapack_int ldb_t = MAX(1,n);
        lapack_complex_double* a_t = NULL;
        lapack_complex_double* b_t = NULL;
        /* Check leading dimension(s) */
        if( lda < n ) {
            info = -5;
            LAPACKE_xerbla( "LAPACKE_zggbal_work", info );
            return info;
        }
        if( ldb < n ) {
            info = -7;
            LAPACKE_xerbla( "LAPACKE_zggbal_work", info );
            return info;
        }
        /* Allocate memory for temporary array(s) */
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            a_t = (lapack_complex_double*)
                LAPACKE_malloc( sizeof(lapack_complex_double) *
                                lda_t * MAX(1,n) );
            if( a_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_0;
            }
        }
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            b_t = (lapack_complex_double*)
                LAPACKE_malloc( sizeof(lapack_complex_double) *
                                ldb_t * MAX(1,n) );
            if( b_t == NULL ) {
                info = LAPACK_TRANSPOSE_MEMORY_ERROR;
                goto exit_level_1;
            }
        }
        /* Transpose input matrices */
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_zge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
        }
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_zge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
        }
        /* Call LAPACK function and adjust info */
        LAPACK_zggbal( &job, &n, a_t, &lda_t, b_t, &ldb_t, ilo, ihi, lscale,
                       rscale, work, &info );
        if( info < 0 ) {
            info = info - 1;
        }
        /* Transpose output matrices */
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
        }
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
        }
        /* Release memory and exit */
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_free( b_t );
        }
exit_level_1:
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            LAPACKE_free( a_t );
        }
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_zggbal_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_zggbal_work", info );
    }
    return info;
}