cungbr_3.c

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/*  Contents: test routine for C interface to LAPACK
*   Author: Intel Corporation
*   Created in March, 2010
*
* Purpose
*
* cungbr_3 is the test program for the C interface to LAPACK
* routine cungbr
* The program doesn't require an input, the input data is hardcoded in the
* test program.
* The program tests the C interface in the four combinations:
*   1) column-major layout, middle-level interface
*   2) column-major layout, high-level interface
*   3) row-major layout, middle-level interface
*   4) row-major layout, high-level interface
* The output of the C interface function is compared to those obtained from
* the corresponiding LAPACK routine with the same input data, and the
* comparison diagnostics is then printed on the standard output having PASSED
* keyword if the test is passed, and FAILED keyword if the test isn't passed.
*****************************************************************************/
#include <stdio.h>
#include "lapacke.h"
#include "lapacke_utils.h"
#include "test_utils.h"

static void init_scalars_cungbr( char *vect, lapack_int *m, lapack_int *n,
                                 lapack_int *k, lapack_int *lda,
                                 lapack_int *lwork );
static void init_a( lapack_int size, lapack_complex_float *a );
static void init_tau( lapack_int size, lapack_complex_float *tau );
static void init_work( lapack_int size, lapack_complex_float *work );
static int compare_cungbr( lapack_complex_float *a, lapack_complex_float *a_i,
                           lapack_int info, lapack_int info_i, lapack_int lda,
                           lapack_int n );

int main(void)
{
    /* Local scalars */
    char vect, vect_i;
    lapack_int m, m_i;
    lapack_int n, n_i;
    lapack_int k, k_i;
    lapack_int lda, lda_i;
    lapack_int lda_r;
    lapack_int lwork, lwork_i;
    lapack_int info, info_i;
    lapack_int i;
    int failed;

    /* Local arrays */
    lapack_complex_float *a = NULL, *a_i = NULL;
    lapack_complex_float *tau = NULL, *tau_i = NULL;
    lapack_complex_float *work = NULL, *work_i = NULL;
    lapack_complex_float *a_save = NULL;
    lapack_complex_float *a_r = NULL;

    /* Iniitialize the scalar parameters */
    init_scalars_cungbr( &vect, &m, &n, &k, &lda, &lwork );
    lda_r = n+2;
    vect_i = vect;
    m_i = m;
    n_i = n;
    k_i = k;
    lda_i = lda;
    lwork_i = lwork;

    /* Allocate memory for the LAPACK routine arrays */
    a = (lapack_complex_float *)
        LAPACKE_malloc( lda*n * sizeof(lapack_complex_float) );
    tau = (lapack_complex_float *)
        LAPACKE_malloc( MIN(m,k) * sizeof(lapack_complex_float) );
    work = (lapack_complex_float *)
        LAPACKE_malloc( lwork * sizeof(lapack_complex_float) );

    /* Allocate memory for the C interface function arrays */
    a_i = (lapack_complex_float *)
        LAPACKE_malloc( lda*n * sizeof(lapack_complex_float) );
    tau_i = (lapack_complex_float *)
        LAPACKE_malloc( MIN(m,k) * sizeof(lapack_complex_float) );
    work_i = (lapack_complex_float *)
        LAPACKE_malloc( lwork * sizeof(lapack_complex_float) );

    /* Allocate memory for the backup arrays */
    a_save = (lapack_complex_float *)
        LAPACKE_malloc( lda*n * sizeof(lapack_complex_float) );

    /* Allocate memory for the row-major arrays */
    a_r = (lapack_complex_float *)
        LAPACKE_malloc( m*(n+2) * sizeof(lapack_complex_float) );

    /* Initialize input arrays */
    init_a( lda*n, a );
    init_tau( (MIN(m,k)), tau );
    init_work( lwork, work );

    /* Backup the ouptut arrays */
    for( i = 0; i < lda*n; i++ ) {
        a_save[i] = a[i];
    }

    /* Call the LAPACK routine */
    cungbr_( &vect, &m, &n, &k, a, &lda, tau, work, &lwork, &info );

    /* Initialize input data, call the column-major middle-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < lda*n; i++ ) {
        a_i[i] = a_save[i];
    }
    for( i = 0; i < (MIN(m,k)); i++ ) {
        tau_i[i] = tau[i];
    }
    for( i = 0; i < lwork; i++ ) {
        work_i[i] = work[i];
    }
    info_i = LAPACKE_cungbr_work( LAPACK_COL_MAJOR, vect_i, m_i, n_i, k_i, a_i,
                                  lda_i, tau_i, work_i, lwork_i );

    failed = compare_cungbr( a, a_i, info, info_i, lda, n );
    if( failed == 0 ) {
        printf( "PASSED: column-major middle-level interface to cungbr\n" );
    } else {
        printf( "FAILED: column-major middle-level interface to cungbr\n" );
    }

    /* Initialize input data, call the column-major high-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < lda*n; i++ ) {
        a_i[i] = a_save[i];
    }
    for( i = 0; i < (MIN(m,k)); i++ ) {
        tau_i[i] = tau[i];
    }
    for( i = 0; i < lwork; i++ ) {
        work_i[i] = work[i];
    }
    info_i = LAPACKE_cungbr( LAPACK_COL_MAJOR, vect_i, m_i, n_i, k_i, a_i,
                             lda_i, tau_i );

    failed = compare_cungbr( a, a_i, info, info_i, lda, n );
    if( failed == 0 ) {
        printf( "PASSED: column-major high-level interface to cungbr\n" );
    } else {
        printf( "FAILED: column-major high-level interface to cungbr\n" );
    }

    /* Initialize input data, call the row-major middle-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < lda*n; i++ ) {
        a_i[i] = a_save[i];
    }
    for( i = 0; i < (MIN(m,k)); i++ ) {
        tau_i[i] = tau[i];
    }
    for( i = 0; i < lwork; i++ ) {
        work_i[i] = work[i];
    }

    LAPACKE_cge_trans( LAPACK_COL_MAJOR, m, n, a_i, lda, a_r, n+2 );
    info_i = LAPACKE_cungbr_work( LAPACK_ROW_MAJOR, vect_i, m_i, n_i, k_i, a_r,
                                  lda_r, tau_i, work_i, lwork_i );

    LAPACKE_cge_trans( LAPACK_ROW_MAJOR, m, n, a_r, n+2, a_i, lda );

    failed = compare_cungbr( a, a_i, info, info_i, lda, n );
    if( failed == 0 ) {
        printf( "PASSED: row-major middle-level interface to cungbr\n" );
    } else {
        printf( "FAILED: row-major middle-level interface to cungbr\n" );
    }

    /* Initialize input data, call the row-major high-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < lda*n; i++ ) {
        a_i[i] = a_save[i];
    }
    for( i = 0; i < (MIN(m,k)); i++ ) {
        tau_i[i] = tau[i];
    }
    for( i = 0; i < lwork; i++ ) {
        work_i[i] = work[i];
    }

    /* Init row_major arrays */
    LAPACKE_cge_trans( LAPACK_COL_MAJOR, m, n, a_i, lda, a_r, n+2 );
    info_i = LAPACKE_cungbr( LAPACK_ROW_MAJOR, vect_i, m_i, n_i, k_i, a_r,
                             lda_r, tau_i );

    LAPACKE_cge_trans( LAPACK_ROW_MAJOR, m, n, a_r, n+2, a_i, lda );

    failed = compare_cungbr( a, a_i, info, info_i, lda, n );
    if( failed == 0 ) {
        printf( "PASSED: row-major high-level interface to cungbr\n" );
    } else {
        printf( "FAILED: row-major high-level interface to cungbr\n" );
    }

    /* Release memory */
    if( a != NULL ) {
        LAPACKE_free( a );
    }
    if( a_i != NULL ) {
        LAPACKE_free( a_i );
    }
    if( a_r != NULL ) {
        LAPACKE_free( a_r );
    }
    if( a_save != NULL ) {
        LAPACKE_free( a_save );
    }
    if( tau != NULL ) {
        LAPACKE_free( tau );
    }
    if( tau_i != NULL ) {
        LAPACKE_free( tau_i );
    }
    if( work != NULL ) {
        LAPACKE_free( work );
    }
    if( work_i != NULL ) {
        LAPACKE_free( work_i );
    }

    return 0;
}

/* Auxiliary function: cungbr scalar parameters initialization */
static void init_scalars_cungbr( char *vect, lapack_int *m, lapack_int *n,
                                 lapack_int *k, lapack_int *lda,
                                 lapack_int *lwork )
{
    *vect = 'P';
    *m = 3;
    *n = 4;
    *k = 3;
    *lda = 8;
    *lwork = 1024;

    return;
}

/* Auxiliary functions: cungbr array parameters initialization */
static void init_a( lapack_int size, lapack_complex_float *a ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        a[i] = lapack_make_complex_float( 0.0f, 0.0f );
    }
    a[0] = lapack_make_complex_float( -2.225511312e+000, 0.000000000e+000 );
    a[8] = lapack_make_complex_float( 2.438442558e-001, -3.082070053e-001 );
    a[16] = lapack_make_complex_float( -2.741365135e-001, -2.309664786e-001 );
    a[24] = lapack_make_complex_float( 5.807709098e-001, 3.468663692e-001 );
    a[1] = lapack_make_complex_float( 2.402505130e-001, 0.000000000e+000 );
    a[9] = lapack_make_complex_float( 1.604558587e+000, 0.000000000e+000 );
    a[17] = lapack_make_complex_float( -8.148437142e-001, -2.237492800e-001 );
    a[25] = lapack_make_complex_float( 9.264151752e-002, 2.633154392e-001 );
    a[2] = lapack_make_complex_float( -5.123384595e-001, 0.000000000e+000 );
    a[10] = lapack_make_complex_float( -3.030344546e-001, -1.735174805e-001 );
    a[18] = lapack_make_complex_float( -1.673056483e+000, 0.000000000e+000 );
    a[26] = lapack_make_complex_float( 1.699978858e-001, -1.700028628e-001 );
}
static void init_tau( lapack_int size, lapack_complex_float *tau ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        tau[i] = lapack_make_complex_float( 0.0f, 0.0f );
    }
    tau[0] = lapack_make_complex_float( 1.125813842e+000, 1.617605835e-001 );
    tau[1] = lapack_make_complex_float( 1.019685388e+000, -3.135510981e-001 );
    tau[2] = lapack_make_complex_float( 1.148659229e+000, 9.232391715e-001 );
}
static void init_work( lapack_int size, lapack_complex_float *work ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        work[i] = lapack_make_complex_float( 0.0f, 0.0f );
    }
}

/* Auxiliary function: C interface to cungbr results check */
/* Return value: 0 - test is passed, non-zero - test is failed */
static int compare_cungbr( lapack_complex_float *a, lapack_complex_float *a_i,
                           lapack_int info, lapack_int info_i, lapack_int lda,
                           lapack_int n )
{
    lapack_int i;
    int failed = 0;
    for( i = 0; i < lda*n; i++ ) {
        failed += compare_complex_floats(a[i],a_i[i]);
    }
    failed += (info == info_i) ? 0 : 1;
    if( info != 0 || info_i != 0 ) {
        printf( "info=%d, info_i=%d\n",(int)info,(int)info_i );
    }

    return failed;
}