ssptrd_3.c

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/*  Contents: test routine for C interface to LAPACK
*   Author: Intel Corporation
*   Created in March, 2010
*
* Purpose
*
* ssptrd_3 is the test program for the C interface to LAPACK
* routine ssptrd
* 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_ssptrd( char *uplo, lapack_int *n );
static void init_ap( lapack_int size, float *ap );
static void init_d( lapack_int size, float *d );
static void init_e( lapack_int size, float *e );
static void init_tau( lapack_int size, float *tau );
static int compare_ssptrd( float *ap, float *ap_i, float *d, float *d_i,
                           float *e, float *e_i, float *tau, float *tau_i,
                           lapack_int info, lapack_int info_i, lapack_int n );

int main(void)
{
    /* Local scalars */
    char uplo, uplo_i;
    lapack_int n, n_i;
    lapack_int info, info_i;
    lapack_int i;
    int failed;

    /* Local arrays */
    float *ap = NULL, *ap_i = NULL;
    float *d = NULL, *d_i = NULL;
    float *e = NULL, *e_i = NULL;
    float *tau = NULL, *tau_i = NULL;
    float *ap_save = NULL;
    float *d_save = NULL;
    float *e_save = NULL;
    float *tau_save = NULL;
    float *ap_r = NULL;

    /* Iniitialize the scalar parameters */
    init_scalars_ssptrd( &uplo, &n );
    uplo_i = uplo;
    n_i = n;

    /* Allocate memory for the LAPACK routine arrays */
    ap = (float *)LAPACKE_malloc( ((n*(n+1)/2)) * sizeof(float) );
    d = (float *)LAPACKE_malloc( n * sizeof(float) );
    e = (float *)LAPACKE_malloc( (n-1) * sizeof(float) );
    tau = (float *)LAPACKE_malloc( (n-1) * sizeof(float) );

    /* Allocate memory for the C interface function arrays */
    ap_i = (float *)LAPACKE_malloc( ((n*(n+1)/2)) * sizeof(float) );
    d_i = (float *)LAPACKE_malloc( n * sizeof(float) );
    e_i = (float *)LAPACKE_malloc( (n-1) * sizeof(float) );
    tau_i = (float *)LAPACKE_malloc( (n-1) * sizeof(float) );

    /* Allocate memory for the backup arrays */
    ap_save = (float *)LAPACKE_malloc( ((n*(n+1)/2)) * sizeof(float) );
    d_save = (float *)LAPACKE_malloc( n * sizeof(float) );
    e_save = (float *)LAPACKE_malloc( (n-1) * sizeof(float) );
    tau_save = (float *)LAPACKE_malloc( (n-1) * sizeof(float) );

    /* Allocate memory for the row-major arrays */
    ap_r = (float *)LAPACKE_malloc( n*(n+1)/2 * sizeof(float) );

    /* Initialize input arrays */
    init_ap( (n*(n+1)/2), ap );
    init_d( n, d );
    init_e( (n-1), e );
    init_tau( (n-1), tau );

    /* Backup the ouptut arrays */
    for( i = 0; i < (n*(n+1)/2); i++ ) {
        ap_save[i] = ap[i];
    }
    for( i = 0; i < n; i++ ) {
        d_save[i] = d[i];
    }
    for( i = 0; i < (n-1); i++ ) {
        e_save[i] = e[i];
    }
    for( i = 0; i < (n-1); i++ ) {
        tau_save[i] = tau[i];
    }

    /* Call the LAPACK routine */
    ssptrd_( &uplo, &n, ap, d, e, tau, &info );

    /* Initialize input data, call the column-major middle-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < (n*(n+1)/2); i++ ) {
        ap_i[i] = ap_save[i];
    }
    for( i = 0; i < n; i++ ) {
        d_i[i] = d_save[i];
    }
    for( i = 0; i < (n-1); i++ ) {
        e_i[i] = e_save[i];
    }
    for( i = 0; i < (n-1); i++ ) {
        tau_i[i] = tau_save[i];
    }
    info_i = LAPACKE_ssptrd_work( LAPACK_COL_MAJOR, uplo_i, n_i, ap_i, d_i, e_i,
                                  tau_i );

    failed = compare_ssptrd( ap, ap_i, d, d_i, e, e_i, tau, tau_i, info, info_i,
                             n );
    if( failed == 0 ) {
        printf( "PASSED: column-major middle-level interface to ssptrd\n" );
    } else {
        printf( "FAILED: column-major middle-level interface to ssptrd\n" );
    }

    /* Initialize input data, call the column-major high-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < (n*(n+1)/2); i++ ) {
        ap_i[i] = ap_save[i];
    }
    for( i = 0; i < n; i++ ) {
        d_i[i] = d_save[i];
    }
    for( i = 0; i < (n-1); i++ ) {
        e_i[i] = e_save[i];
    }
    for( i = 0; i < (n-1); i++ ) {
        tau_i[i] = tau_save[i];
    }
    info_i = LAPACKE_ssptrd( LAPACK_COL_MAJOR, uplo_i, n_i, ap_i, d_i, e_i,
                             tau_i );

    failed = compare_ssptrd( ap, ap_i, d, d_i, e, e_i, tau, tau_i, info, info_i,
                             n );
    if( failed == 0 ) {
        printf( "PASSED: column-major high-level interface to ssptrd\n" );
    } else {
        printf( "FAILED: column-major high-level interface to ssptrd\n" );
    }

    /* Initialize input data, call the row-major middle-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < (n*(n+1)/2); i++ ) {
        ap_i[i] = ap_save[i];
    }
    for( i = 0; i < n; i++ ) {
        d_i[i] = d_save[i];
    }
    for( i = 0; i < (n-1); i++ ) {
        e_i[i] = e_save[i];
    }
    for( i = 0; i < (n-1); i++ ) {
        tau_i[i] = tau_save[i];
    }

    LAPACKE_spp_trans( LAPACK_COL_MAJOR, uplo, n, ap_i, ap_r );
    info_i = LAPACKE_ssptrd_work( LAPACK_ROW_MAJOR, uplo_i, n_i, ap_r, d_i, e_i,
                                  tau_i );

    LAPACKE_spp_trans( LAPACK_ROW_MAJOR, uplo, n, ap_r, ap_i );

    failed = compare_ssptrd( ap, ap_i, d, d_i, e, e_i, tau, tau_i, info, info_i,
                             n );
    if( failed == 0 ) {
        printf( "PASSED: row-major middle-level interface to ssptrd\n" );
    } else {
        printf( "FAILED: row-major middle-level interface to ssptrd\n" );
    }

    /* Initialize input data, call the row-major high-level
     * interface to LAPACK routine and check the results */
    for( i = 0; i < (n*(n+1)/2); i++ ) {
        ap_i[i] = ap_save[i];
    }
    for( i = 0; i < n; i++ ) {
        d_i[i] = d_save[i];
    }
    for( i = 0; i < (n-1); i++ ) {
        e_i[i] = e_save[i];
    }
    for( i = 0; i < (n-1); i++ ) {
        tau_i[i] = tau_save[i];
    }

    /* Init row_major arrays */
    LAPACKE_spp_trans( LAPACK_COL_MAJOR, uplo, n, ap_i, ap_r );
    info_i = LAPACKE_ssptrd( LAPACK_ROW_MAJOR, uplo_i, n_i, ap_r, d_i, e_i,
                             tau_i );

    LAPACKE_spp_trans( LAPACK_ROW_MAJOR, uplo, n, ap_r, ap_i );

    failed = compare_ssptrd( ap, ap_i, d, d_i, e, e_i, tau, tau_i, info, info_i,
                             n );
    if( failed == 0 ) {
        printf( "PASSED: row-major high-level interface to ssptrd\n" );
    } else {
        printf( "FAILED: row-major high-level interface to ssptrd\n" );
    }

    /* Release memory */
    if( ap != NULL ) {
        LAPACKE_free( ap );
    }
    if( ap_i != NULL ) {
        LAPACKE_free( ap_i );
    }
    if( ap_r != NULL ) {
        LAPACKE_free( ap_r );
    }
    if( ap_save != NULL ) {
        LAPACKE_free( ap_save );
    }
    if( d != NULL ) {
        LAPACKE_free( d );
    }
    if( d_i != NULL ) {
        LAPACKE_free( d_i );
    }
    if( d_save != NULL ) {
        LAPACKE_free( d_save );
    }
    if( e != NULL ) {
        LAPACKE_free( e );
    }
    if( e_i != NULL ) {
        LAPACKE_free( e_i );
    }
    if( e_save != NULL ) {
        LAPACKE_free( e_save );
    }
    if( tau != NULL ) {
        LAPACKE_free( tau );
    }
    if( tau_i != NULL ) {
        LAPACKE_free( tau_i );
    }
    if( tau_save != NULL ) {
        LAPACKE_free( tau_save );
    }

    return 0;
}

/* Auxiliary function: ssptrd scalar parameters initialization */
static void init_scalars_ssptrd( char *uplo, lapack_int *n )
{
    *uplo = 'L';
    *n = 4;

    return;
}

/* Auxiliary functions: ssptrd array parameters initialization */
static void init_ap( lapack_int size, float *ap ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        ap[i] = 0;
    }
    ap[0] = 5.769230798e-002;
    ap[1] = 1.703930944e-001;
    ap[2] = 2.949949205e-001;
    ap[3] = -6.024086475e-001;
    ap[4] = 2.267657369e-001;
    ap[5] = 8.667321205e-001;
    ap[6] = -6.159023643e-001;
    ap[7] = -5.000129342e-002;
    ap[8] = 3.972190619e-001;
    ap[9] = -1.687545180e+000;
}
static void init_d( lapack_int size, float *d ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        d[i] = 0;
    }
}
static void init_e( lapack_int size, float *e ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        e[i] = 0;
    }
}
static void init_tau( lapack_int size, float *tau ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        tau[i] = 0;
    }
}

/* Auxiliary function: C interface to ssptrd results check */
/* Return value: 0 - test is passed, non-zero - test is failed */
static int compare_ssptrd( float *ap, float *ap_i, float *d, float *d_i,
                           float *e, float *e_i, float *tau, float *tau_i,
                           lapack_int info, lapack_int info_i, lapack_int n )
{
    lapack_int i;
    int failed = 0;
    for( i = 0; i < (n*(n+1)/2); i++ ) {
        failed += compare_floats(ap[i],ap_i[i]);
    }
    for( i = 0; i < n; i++ ) {
        failed += compare_floats(d[i],d_i[i]);
    }
    for( i = 0; i < (n-1); i++ ) {
        failed += compare_floats(e[i],e_i[i]);
    }
    for( i = 0; i < (n-1); i++ ) {
        failed += compare_floats(tau[i],tau_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;
}