chseqr_3.c

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/*  Contents: test routine for C interface to LAPACK
*   Author: Intel Corporation
*   Created in March, 2010
*
* Purpose
*
* chseqr_3 is the test program for the C interface to LAPACK
* routine chseqr
* 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_chseqr( char *job, char *compz, lapack_int *n,
                                 lapack_int *ilo, lapack_int *ihi,
                                 lapack_int *ldh, lapack_int *ldz,
                                 lapack_int *lwork );
static void init_h( lapack_int size, lapack_complex_float *h );
static void init_w( lapack_int size, lapack_complex_float *w );
static void init_z( lapack_int size, lapack_complex_float *z );
static void init_work( lapack_int size, lapack_complex_float *work );
static int compare_chseqr( lapack_complex_float *h, lapack_complex_float *h_i,
                           lapack_complex_float *w, lapack_complex_float *w_i,
                           lapack_complex_float *z, lapack_complex_float *z_i,
                           lapack_int info, lapack_int info_i, char compz,
                           lapack_int ldh, lapack_int ldz, lapack_int n );

int main(void)
{
    /* Local scalars */
    char job, job_i;
    char compz, compz_i;
    lapack_int n, n_i;
    lapack_int ilo, ilo_i;
    lapack_int ihi, ihi_i;
    lapack_int ldh, ldh_i;
    lapack_int ldh_r;
    lapack_int ldz, ldz_i;
    lapack_int ldz_r;
    lapack_int lwork, lwork_i;
    lapack_int info, info_i;
    lapack_int i;
    int failed;

    /* Local arrays */
    lapack_complex_float *h = NULL, *h_i = NULL;
    lapack_complex_float *w = NULL, *w_i = NULL;
    lapack_complex_float *z = NULL, *z_i = NULL;
    lapack_complex_float *work = NULL, *work_i = NULL;
    lapack_complex_float *h_save = NULL;
    lapack_complex_float *w_save = NULL;
    lapack_complex_float *z_save = NULL;
    lapack_complex_float *h_r = NULL;
    lapack_complex_float *z_r = NULL;

    /* Iniitialize the scalar parameters */
    init_scalars_chseqr( &job, &compz, &n, &ilo, &ihi, &ldh, &ldz, &lwork );
    ldh_r = n+2;
    ldz_r = n+2;
    job_i = job;
    compz_i = compz;
    n_i = n;
    ilo_i = ilo;
    ihi_i = ihi;
    ldh_i = ldh;
    ldz_i = ldz;
    lwork_i = lwork;

    /* Allocate memory for the LAPACK routine arrays */
    h = (lapack_complex_float *)
        LAPACKE_malloc( ldh*n * sizeof(lapack_complex_float) );
    w = (lapack_complex_float *)
        LAPACKE_malloc( n * sizeof(lapack_complex_float) );
    z = (lapack_complex_float *)
        LAPACKE_malloc( ldz*n * sizeof(lapack_complex_float) );
    work = (lapack_complex_float *)
        LAPACKE_malloc( lwork * sizeof(lapack_complex_float) );

    /* Allocate memory for the C interface function arrays */
    h_i = (lapack_complex_float *)
        LAPACKE_malloc( ldh*n * sizeof(lapack_complex_float) );
    w_i = (lapack_complex_float *)
        LAPACKE_malloc( n * sizeof(lapack_complex_float) );
    z_i = (lapack_complex_float *)
        LAPACKE_malloc( ldz*n * sizeof(lapack_complex_float) );
    work_i = (lapack_complex_float *)
        LAPACKE_malloc( lwork * sizeof(lapack_complex_float) );

    /* Allocate memory for the backup arrays */
    h_save = (lapack_complex_float *)
        LAPACKE_malloc( ldh*n * sizeof(lapack_complex_float) );
    w_save = (lapack_complex_float *)
        LAPACKE_malloc( n * sizeof(lapack_complex_float) );
    z_save = (lapack_complex_float *)
        LAPACKE_malloc( ldz*n * sizeof(lapack_complex_float) );

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

    /* Initialize input arrays */
    init_h( ldh*n, h );
    init_w( n, w );
    init_z( ldz*n, z );
    init_work( lwork, work );

    /* Backup the ouptut arrays */
    for( i = 0; i < ldh*n; i++ ) {
        h_save[i] = h[i];
    }
    for( i = 0; i < n; i++ ) {
        w_save[i] = w[i];
    }
    for( i = 0; i < ldz*n; i++ ) {
        z_save[i] = z[i];
    }

    /* Call the LAPACK routine */
    chseqr_( &job, &compz, &n, &ilo, &ihi, h, &ldh, w, z, &ldz, work, &lwork,
             &info );

    /* Initialize input data, call the column-major middle-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < ldh*n; i++ ) {
        h_i[i] = h_save[i];
    }
    for( i = 0; i < n; i++ ) {
        w_i[i] = w_save[i];
    }
    for( i = 0; i < ldz*n; i++ ) {
        z_i[i] = z_save[i];
    }
    for( i = 0; i < lwork; i++ ) {
        work_i[i] = work[i];
    }
    info_i = LAPACKE_chseqr_work( LAPACK_COL_MAJOR, job_i, compz_i, n_i, ilo_i,
                                  ihi_i, h_i, ldh_i, w_i, z_i, ldz_i, work_i,
                                  lwork_i );

    failed = compare_chseqr( h, h_i, w, w_i, z, z_i, info, info_i, compz, ldh,
                             ldz, n );
    if( failed == 0 ) {
        printf( "PASSED: column-major middle-level interface to chseqr\n" );
    } else {
        printf( "FAILED: column-major middle-level interface to chseqr\n" );
    }

    /* Initialize input data, call the column-major high-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < ldh*n; i++ ) {
        h_i[i] = h_save[i];
    }
    for( i = 0; i < n; i++ ) {
        w_i[i] = w_save[i];
    }
    for( i = 0; i < ldz*n; i++ ) {
        z_i[i] = z_save[i];
    }
    for( i = 0; i < lwork; i++ ) {
        work_i[i] = work[i];
    }
    info_i = LAPACKE_chseqr( LAPACK_COL_MAJOR, job_i, compz_i, n_i, ilo_i,
                             ihi_i, h_i, ldh_i, w_i, z_i, ldz_i );

    failed = compare_chseqr( h, h_i, w, w_i, z, z_i, info, info_i, compz, ldh,
                             ldz, n );
    if( failed == 0 ) {
        printf( "PASSED: column-major high-level interface to chseqr\n" );
    } else {
        printf( "FAILED: column-major high-level interface to chseqr\n" );
    }

    /* Initialize input data, call the row-major middle-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < ldh*n; i++ ) {
        h_i[i] = h_save[i];
    }
    for( i = 0; i < n; i++ ) {
        w_i[i] = w_save[i];
    }
    for( i = 0; i < ldz*n; i++ ) {
        z_i[i] = z_save[i];
    }
    for( i = 0; i < lwork; i++ ) {
        work_i[i] = work[i];
    }

    LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, h_i, ldh, h_r, n+2 );
    if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
        LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, z_i, ldz, z_r, n+2 );
    }
    info_i = LAPACKE_chseqr_work( LAPACK_ROW_MAJOR, job_i, compz_i, n_i, ilo_i,
                                  ihi_i, h_r, ldh_r, w_i, z_r, ldz_r, work_i,
                                  lwork_i );

    LAPACKE_cge_trans( LAPACK_ROW_MAJOR, n, n, h_r, n+2, h_i, ldh );
    if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
        LAPACKE_cge_trans( LAPACK_ROW_MAJOR, n, n, z_r, n+2, z_i, ldz );
    }

    failed = compare_chseqr( h, h_i, w, w_i, z, z_i, info, info_i, compz, ldh,
                             ldz, n );
    if( failed == 0 ) {
        printf( "PASSED: row-major middle-level interface to chseqr\n" );
    } else {
        printf( "FAILED: row-major middle-level interface to chseqr\n" );
    }

    /* Initialize input data, call the row-major high-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < ldh*n; i++ ) {
        h_i[i] = h_save[i];
    }
    for( i = 0; i < n; i++ ) {
        w_i[i] = w_save[i];
    }
    for( i = 0; i < ldz*n; i++ ) {
        z_i[i] = z_save[i];
    }
    for( i = 0; i < lwork; i++ ) {
        work_i[i] = work[i];
    }

    /* Init row_major arrays */
    LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, h_i, ldh, h_r, n+2 );
    if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
        LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, z_i, ldz, z_r, n+2 );
    }
    info_i = LAPACKE_chseqr( LAPACK_ROW_MAJOR, job_i, compz_i, n_i, ilo_i,
                             ihi_i, h_r, ldh_r, w_i, z_r, ldz_r );

    LAPACKE_cge_trans( LAPACK_ROW_MAJOR, n, n, h_r, n+2, h_i, ldh );
    if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
        LAPACKE_cge_trans( LAPACK_ROW_MAJOR, n, n, z_r, n+2, z_i, ldz );
    }

    failed = compare_chseqr( h, h_i, w, w_i, z, z_i, info, info_i, compz, ldh,
                             ldz, n );
    if( failed == 0 ) {
        printf( "PASSED: row-major high-level interface to chseqr\n" );
    } else {
        printf( "FAILED: row-major high-level interface to chseqr\n" );
    }

    /* Release memory */
    if( h != NULL ) {
        LAPACKE_free( h );
    }
    if( h_i != NULL ) {
        LAPACKE_free( h_i );
    }
    if( h_r != NULL ) {
        LAPACKE_free( h_r );
    }
    if( h_save != NULL ) {
        LAPACKE_free( h_save );
    }
    if( w != NULL ) {
        LAPACKE_free( w );
    }
    if( w_i != NULL ) {
        LAPACKE_free( w_i );
    }
    if( w_save != NULL ) {
        LAPACKE_free( w_save );
    }
    if( z != NULL ) {
        LAPACKE_free( z );
    }
    if( z_i != NULL ) {
        LAPACKE_free( z_i );
    }
    if( z_r != NULL ) {
        LAPACKE_free( z_r );
    }
    if( z_save != NULL ) {
        LAPACKE_free( z_save );
    }
    if( work != NULL ) {
        LAPACKE_free( work );
    }
    if( work_i != NULL ) {
        LAPACKE_free( work_i );
    }

    return 0;
}

/* Auxiliary function: chseqr scalar parameters initialization */
static void init_scalars_chseqr( char *job, char *compz, lapack_int *n,
                                 lapack_int *ilo, lapack_int *ihi,
                                 lapack_int *ldh, lapack_int *ldz,
                                 lapack_int *lwork )
{
    *job = 'S';
    *compz = 'V';
    *n = 4;
    *ilo = 1;
    *ihi = 4;
    *ldh = 8;
    *ldz = 8;
    *lwork = 448;

    return;
}

/* Auxiliary functions: chseqr array parameters initialization */
static void init_h( lapack_int size, lapack_complex_float *h ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        h[i] = lapack_make_complex_float( 0.0f, 0.0f );
    }
    h[0] = lapack_make_complex_float( -3.970000029e+000, -5.039999962e+000 );
    h[8] = lapack_make_complex_float( -1.131804943e+000, -2.569304705e+000 );
    h[16] = lapack_make_complex_float( -4.602741241e+000, -1.426316500e-001 );
    h[24] = lapack_make_complex_float( -1.424912333e+000, 1.732983828e+000 );
    h[1] = lapack_make_complex_float( -5.479653358e+000, 0.000000000e+000 );
    h[9] = lapack_make_complex_float( 1.858472466e+000, -1.550180435e+000 );
    h[17] = lapack_make_complex_float( 4.414464474e+000, -7.638237476e-001 );
    h[25] = lapack_make_complex_float( -4.805260897e-001, -1.197600603e+000 );
    h[2] = lapack_make_complex_float( 6.932221651e-001, -4.828752279e-001 );
    h[10] = lapack_make_complex_float( 6.267275810e+000, 0.000000000e+000 );
    h[18] = lapack_make_complex_float( -4.503800869e-001, -2.898204327e-002 );
    h[26] = lapack_make_complex_float( -1.346683741e+000, 1.657924891e+000 );
    h[3] = lapack_make_complex_float( -2.112946808e-001, 8.644121885e-002 );
    h[11] = lapack_make_complex_float( 1.242147088e-001, -2.289276123e-001 );
    h[19] = lapack_make_complex_float( -3.499985933e+000, 0.000000000e+000 );
    h[27] = lapack_make_complex_float( 2.561908484e+000, -3.370837450e+000 );
}
static void init_w( lapack_int size, lapack_complex_float *w ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        w[i] = lapack_make_complex_float( 0.0f, 0.0f );
    }
}
static void init_z( lapack_int size, lapack_complex_float *z ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        z[i] = lapack_make_complex_float( 0.0f, 0.0f );
    }
    z[0] = lapack_make_complex_float( 1.000000000e+000, 0.000000000e+000 );
    z[8] = lapack_make_complex_float( 0.000000000e+000, 0.000000000e+000 );
    z[16] = lapack_make_complex_float( 0.000000000e+000, 0.000000000e+000 );
    z[24] = lapack_make_complex_float( 0.000000000e+000, 0.000000000e+000 );
    z[1] = lapack_make_complex_float( 0.000000000e+000, 0.000000000e+000 );
    z[9] = lapack_make_complex_float( -6.204771996e-002, 2.737399340e-001 );
    z[17] = lapack_make_complex_float( 4.994977713e-001, 6.440132260e-001 );
    z[25] = lapack_make_complex_float( 4.237119257e-001, -2.782686949e-001 );
    z[2] = lapack_make_complex_float( 0.000000000e+000, 0.000000000e+000 );
    z[10] = lapack_make_complex_float( -6.040527821e-001, 7.025991082e-001 );
    z[18] = lapack_make_complex_float( -1.486803293e-001, -1.426575333e-001 );
    z[26] = lapack_make_complex_float( -2.633657455e-001, -1.722092628e-001 );
    z[3] = lapack_make_complex_float( 0.000000000e+000, 0.000000000e+000 );
    z[11] = lapack_make_complex_float( 2.007426172e-001, -1.496444941e-001 );
    z[19] = lapack_make_complex_float( -4.651779532e-001, 2.773107588e-001 );
    z[27] = lapack_make_complex_float( -2.482300401e-001, -7.631506920e-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 chseqr results check */
/* Return value: 0 - test is passed, non-zero - test is failed */
static int compare_chseqr( lapack_complex_float *h, lapack_complex_float *h_i,
                           lapack_complex_float *w, lapack_complex_float *w_i,
                           lapack_complex_float *z, lapack_complex_float *z_i,
                           lapack_int info, lapack_int info_i, char compz,
                           lapack_int ldh, lapack_int ldz, lapack_int n )
{
    lapack_int i;
    int failed = 0;
    for( i = 0; i < ldh*n; i++ ) {
        failed += compare_complex_floats(h[i],h_i[i]);
    }
    for( i = 0; i < n; i++ ) {
        failed += compare_complex_floats(w[i],w_i[i]);
    }
    if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
        for( i = 0; i < ldz*n; i++ ) {
            failed += compare_complex_floats(z[i],z_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;
}