LAPACKE_chetrd_work()

lapack_int LAPACKE_chetrd_work	(	int	matrix_layout,
		char	uplo,
		lapack_int	n,
		lapack_complex_float *	a,
		lapack_int	lda,
		float *	d,
		float *	e,
		lapack_complex_float *	tau,
		lapack_complex_float *	work,
		lapack_int	lwork
	)

Definition at line 35 of file lapacke_chetrd_work.c.

{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_chetrd( &uplo, &n, a, &lda, d, e, tau, work, &lwork, &info );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int lda_t = MAX(1,n);
        lapack_complex_float* a_t = NULL;
        /* Check leading dimension(s) */
        if( lda < n ) {
            info = -5;
            LAPACKE_xerbla( "LAPACKE_chetrd_work", info );
            return info;
        }
        /* Query optimal working array(s) size if requested */
        if( lwork == -1 ) {
            LAPACK_chetrd( &uplo, &n, a, &lda_t, d, e, tau, work, &lwork,
                           &info );
            return (info < 0) ? (info - 1) : info;
        }
        /* Allocate memory for temporary array(s) */
        a_t = (lapack_complex_float*)
            LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
        if( a_t == NULL ) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_0;
        }
        /* Transpose input matrices */
        LAPACKE_che_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
        /* Call LAPACK function and adjust info */
        LAPACK_chetrd( &uplo, &n, a_t, &lda_t, d, e, tau, work, &lwork, &info );
        if( info < 0 ) {
            info = info - 1;
        }
        /* Transpose output matrices */
        LAPACKE_che_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
        /* Release memory and exit */
        LAPACKE_free( a_t );
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_chetrd_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_chetrd_work", info );
    }
    return info;
}

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