lapacke_dlansy_work.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
double	LAPACKE_dlansy_work (int matrix_layout, char norm, char uplo, lapack_int n, const double *a, lapack_int lda, double *work)

Function Documentation

LAPACKE_dlansy_work()

double LAPACKE_dlansy_work	(	int	matrix_layout,
		char	norm,
		char	uplo,
		lapack_int	n,
		const double *	a,
		lapack_int	lda,
		double *	work )

Definition at line 35 of file lapacke_dlansy_work.c.

{
    lapack_int info = 0;
    double res = 0.;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        res = LAPACK_dlansy( &norm, &uplo, &n, a, &lda, work );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int lda_t = MAX(1,n);
        double* a_t = NULL;
        /* Check leading dimension(s) */
        if( lda < n ) {
            info = -6;
            LAPACKE_xerbla( "LAPACKE_dlansy_work", info );
            return info;
        }
        /* Allocate memory for temporary array(s) */
        a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
        if( a_t == NULL ) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_0;
        }
        /* Transpose input matrices */
        LAPACKE_dsy_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
        /* Call LAPACK function and adjust info */
        res = LAPACK_dlansy( &norm, &uplo, &n, a_t, &lda_t, work );
        info = 0;  /* LAPACK call is ok! */
        /* Release memory and exit */
        LAPACKE_free( a_t );
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_dlansy_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_dlansy_work", info );
    }
    return res;
}