lapacke_zlacrm_work.c

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* Contents: Native middle-level C interface to LAPACK function zlacrm
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_zlacrm_work(int matrix_layout, lapack_int m, lapack_int n,
                                const lapack_complex_double* a, lapack_int lda,
                                const double* b, lapack_int ldb,
                                lapack_complex_double* c, lapack_int ldc,
                                double* rwork)
{
    lapack_int info = 0;
    if (matrix_layout == LAPACK_COL_MAJOR) {
        /* Call LAPACK function */
        LAPACK_zlacrm(&m, &n, a, &lda, b, &ldb, c, &ldc, rwork);
    } else if (matrix_layout == LAPACK_ROW_MAJOR) {
        lapack_int lda_t = MAX(1,m);
        lapack_int ldb_t = MAX(1,n);
        lapack_int ldc_t = MAX(1,m);
        lapack_complex_double* a_t = NULL;
        double* b_t = NULL;
        lapack_complex_double* c_t = NULL;
        /* Check leading dimension(s) */
        if( lda < n ) {
            info = -5;
            LAPACKE_xerbla( "LAPACKE_zlacrm_work", info );
            return info;
        }
        if( ldb < n ) {
            info = -7;
            LAPACKE_xerbla( "LAPACKE_zlacrm_work", info );
            return info;
        }
        if( ldc < n ) {
            info = -9;
            LAPACKE_xerbla( "LAPACKE_zlacrm_work", info );
            return info;
        }
        /* Allocate memory for temporary array(s) */
        a_t = (lapack_complex_double*)
            LAPACKE_malloc(sizeof(lapack_complex_double) * lda_t * MAX(1,n));
        b_t = (double*)
            LAPACKE_malloc(sizeof(double) * ldb_t * MAX(1,n));
        c_t = (lapack_complex_double*)
            LAPACKE_malloc((sizeof(lapack_complex_double) * ldc_t * MAX(1,n)));
        if (a_t == NULL) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_0;
        }
        if (b_t == NULL) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_1;
        }
        if (c_t == NULL) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_2;
        }
        /* Transpose input matrices */
        LAPACKE_zge_trans(matrix_layout, m, n, a, lda, a_t, lda_t);
        LAPACKE_dge_trans(matrix_layout, n, n, b, ldb, b_t, ldb_t);
        /* Call LAPACK function */
        LAPACK_zlacrm(&m, &n, a_t, &lda_t, b_t, &ldb_t, c_t, &ldc_t, rwork);
        /* Transpose output matrices */
        LAPACKE_zge_trans(LAPACK_COL_MAJOR, m, n, c_t, ldc_t, c, ldc);
        /* Release memory and exit */
        LAPACKE_free(c_t);
exit_level_2:
        LAPACKE_free(b_t);
exit_level_1:
        LAPACKE_free(a_t);
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_zlacrm_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla("LAPACKE_zlacrm_work", -1);
    }
    return info;
}