lapacke_dlarfx_work.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_dlarfx_work (int matrix_layout, char side, lapack_int m, lapack_int n, const double *v, double tau, double *c, lapack_int ldc, double *work)

Function Documentation

LAPACKE_dlarfx_work()

lapack_int LAPACKE_dlarfx_work	(	int	matrix_layout,
		char	side,
		lapack_int	m,
		lapack_int	n,
		const double *	v,
		double	tau,
		double *	c,
		lapack_int	ldc,
		double *	work )

Definition at line 35 of file lapacke_dlarfx_work.c.

{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_dlarfx( &side, &m, &n, v, &tau, c, &ldc, work );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int ldc_t = MAX(1,m);
        double* c_t = NULL;
        /* Check leading dimension(s) */
        if( ldc < n ) {
            info = -8;
            LAPACKE_xerbla( "LAPACKE_dlarfx_work", info );
            return info;
        }
        /* Allocate memory for temporary array(s) */
        c_t = (double*)LAPACKE_malloc( sizeof(double) * ldc_t * MAX(1,n) );
        if( c_t == NULL ) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_0;
        }
        /* Transpose input matrices */
        LAPACKE_dge_trans( matrix_layout, m, n, c, ldc, c_t, ldc_t );
        /* Call LAPACK function and adjust info */
        LAPACK_dlarfx( &side, &m, &n, v, &tau, c_t, &ldc_t, work );
        info = 0;  /* LAPACK call is ok! */
        /* Transpose output matrices */
        LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, c_t, ldc_t, c, ldc );
        /* Release memory and exit */
        LAPACKE_free( c_t );
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_dlarfx_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_dlarfx_work", info );
    }
    return info;
}