lapacke_dorcsd.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions

lapack_int

LAPACKE_dorcsd (int matrix_layout, char jobu1, char jobu2, char jobv1t, char jobv2t, char trans, char signs, lapack_int m, lapack_int p, lapack_int q, double *x11, lapack_int ldx11, double *x12, lapack_int ldx12, double *x21, lapack_int ldx21, double *x22, lapack_int ldx22, double *theta, double *u1, lapack_int ldu1, double *u2, lapack_int ldu2, double *v1t, lapack_int ldv1t, double *v2t, lapack_int ldv2t)

Function Documentation

LAPACKE_dorcsd()

lapack_int LAPACKE_dorcsd	(	int	matrix_layout,
		char	jobu1,
		char	jobu2,
		char	jobv1t,
		char	jobv2t,
		char	trans,
		char	signs,
		lapack_int	m,
		lapack_int	p,
		lapack_int	q,
		double *	x11,
		lapack_int	ldx11,
		double *	x12,
		lapack_int	ldx12,
		double *	x21,
		lapack_int	ldx21,
		double *	x22,
		lapack_int	ldx22,
		double *	theta,
		double *	u1,
		lapack_int	ldu1,
		double *	u2,
		lapack_int	ldu2,
		double *	v1t,
		lapack_int	ldv1t,
		double *	v2t,
		lapack_int	ldv2t )

Definition at line 35 of file lapacke_dorcsd.c.

{
    lapack_int info = 0;
    lapack_int lwork = -1;
    lapack_int* iwork = NULL;
    double* work = NULL;
    double work_query;
    int lapack_layout;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dorcsd", -1 );
        return -1;
    }
    if( LAPACKE_lsame( trans, 'n' ) && matrix_layout == LAPACK_COL_MAJOR ) {
        lapack_layout = LAPACK_COL_MAJOR;
    } else {
        lapack_layout = LAPACK_ROW_MAJOR;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_dge_nancheck( lapack_layout, p, q, x11, ldx11 ) ) {
            return -11;
        }
        if( LAPACKE_dge_nancheck( lapack_layout, p, m-q, x12, ldx12 ) ) {
            return -13;
        }
        if( LAPACKE_dge_nancheck( lapack_layout, m-p, q, x21, ldx21 ) ) {
            return -15;
        }
        if( LAPACKE_dge_nancheck( lapack_layout, m-p, m-q, x22, ldx22 ) ) {
            return -17;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,m-MIN(MIN(p,m-p),MIN(q,m-q))) );
    if( iwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Query optimal working array(s) size */
    info = LAPACKE_dorcsd_work( matrix_layout, jobu1, jobu2, jobv1t, jobv2t,
                                trans, signs, m, p, q, x11, ldx11, x12, ldx12,
                                x21, ldx21, x22, ldx22, theta, u1, ldu1, u2,
                                ldu2, v1t, ldv1t, v2t, ldv2t, &work_query,
                                lwork, iwork );
    if( info != 0 ) {
        goto exit_level_1;
    }
    lwork = (lapack_int)work_query;
    /* Allocate memory for work arrays */
    work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dorcsd_work( matrix_layout, jobu1, jobu2, jobv1t, jobv2t,
                                trans, signs, m, p, q, x11, ldx11, x12, ldx12,
                                x21, ldx21, x22, ldx22, theta, u1, ldu1, u2,
                                ldu2, v1t, ldv1t, v2t, ldv2t, work, lwork,
                                iwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    LAPACKE_free( iwork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dorcsd", info );
    }
    return info;
}