lapacke_cggsvd3.c

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* Contents: Native high-level C interface to LAPACK function cggsvd3
* Author: Intel Corporation
* Generated August, 2015
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_cggsvd3( 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_float* a, lapack_int lda,
                            lapack_complex_float* b, lapack_int ldb,
                            float* alpha, float* beta, lapack_complex_float* u,
                            lapack_int ldu, lapack_complex_float* v,
                            lapack_int ldv, lapack_complex_float* q,
                            lapack_int ldq, lapack_int* iwork )
{
    lapack_int info = 0;
    float* rwork = NULL;
                lapack_int lwork = -1;
    lapack_complex_float* work = NULL;
    lapack_complex_float work_query;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_cggsvd3", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_cge_nancheck( matrix_layout, m, n, a, lda ) ) {
        return -10;
    }
    if( LAPACKE_cge_nancheck( matrix_layout, p, n, b, ldb ) ) {
        return -12;
    }
#endif
    /* Query optimal size for working array */
    info = LAPACKE_cggsvd3_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_C2INT( work_query );
    /* Allocate memory for working array(s) */
    rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,2*n) );
    if( rwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (lapack_complex_float*)
        LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_cggsvd3_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_cggsvd3", info );
    }
    return info;
}