lapacke_zggsvd3.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_zggsvd3 (int matrix_layout, char jobu, char jobv, char jobq, lapack_int m, lapack_int n, lapack_int p, lapack_int *k, lapack_int *l, lapack_complex_double *a, lapack_int lda, lapack_complex_double *b, lapack_int ldb, double *alpha, double *beta, lapack_complex_double *u, lapack_int ldu, lapack_complex_double *v, lapack_int ldv, lapack_complex_double *q, lapack_int ldq, lapack_int *iwork)

Function Documentation

LAPACKE_zggsvd3()

lapack_int LAPACKE_zggsvd3	(	int	matrix_layout,
		char	jobu,
		char	jobv,
		char	jobq,
		lapack_int	m,
		lapack_int	n,
		lapack_int	p,
		lapack_int *	k,
		lapack_int *	l,
		lapack_complex_double *	a,
		lapack_int	lda,
		lapack_complex_double *	b,
		lapack_int	ldb,
		double *	alpha,
		double *	beta,
		lapack_complex_double *	u,
		lapack_int	ldu,
		lapack_complex_double *	v,
		lapack_int	ldv,
		lapack_complex_double *	q,
		lapack_int	ldq,
		lapack_int *	iwork )

Definition at line 35 of file lapacke_zggsvd3.c.

{
    lapack_int info = 0;
    double* rwork = NULL;
    lapack_int lwork = -1;
    lapack_complex_double* work = NULL;
    lapack_complex_double work_query;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_zggsvd3", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_zge_nancheck( matrix_layout, m, n, a, lda ) ) {
            return -10;
        }
        if( LAPACKE_zge_nancheck( matrix_layout, p, n, b, ldb ) ) {
            return -12;
        }
    }
#endif
    /* Query optimal size for working array */
    info = LAPACKE_zggsvd3_work( matrix_layout, jobu, jobv, jobq, m, n, p, k, l,
                                 a, lda, b, ldb, alpha, beta, u, ldu, v, ldv, q,
                                 ldq, &work_query, lwork, rwork, iwork );
    if( info != 0 )
      goto exit_level_0;
    lwork = LAPACK_Z2INT( work_query );
    /* Allocate memory for working array(s) */
    rwork = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,2*n) );
    if( rwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (lapack_complex_double*)
      LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_zggsvd3_work( matrix_layout, jobu, jobv, jobq, m, n, p, k, l,
                                 a, lda, b, ldb, alpha, beta, u, ldu, v, ldv, q,
                                 ldq, work, lwork, rwork, iwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    LAPACKE_free( rwork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_zggsvd3", info );
    }
    return info;
}