dtrexc_1.c

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/*  Contents: test routine for C interface to LAPACK
*   Author: Intel Corporation
*   Created in March, 2010
*
* Purpose
*
* dtrexc_1 is the test program for the C interface to LAPACK
* routine dtrexc
* 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_dtrexc( char *compq, lapack_int *n, lapack_int *ldt,
                                 lapack_int *ldq, lapack_int *ifst,
                                 lapack_int *ilst );
static void init_t( lapack_int size, double *t );
static void init_q( lapack_int size, double *q );
static void init_work( lapack_int size, double *work );
static int compare_dtrexc( double *t, double *t_i, double *q, double *q_i,
                           lapack_int ifst, lapack_int ifst_i, lapack_int ilst,
                           lapack_int ilst_i, lapack_int info,
                           lapack_int info_i, char compq, lapack_int ldq,
                           lapack_int ldt, lapack_int n );

int main(void)
{
    /* Local scalars */
    char compq, compq_i;
    lapack_int n, n_i;
    lapack_int ldt, ldt_i;
    lapack_int ldt_r;
    lapack_int ldq, ldq_i;
    lapack_int ldq_r;
    lapack_int ifst, ifst_i, ifst_save;
    lapack_int ilst, ilst_i, ilst_save;
    lapack_int info, info_i;
    lapack_int i;
    int failed;

    /* Local arrays */
    double *t = NULL, *t_i = NULL;
    double *q = NULL, *q_i = NULL;
    double *work = NULL, *work_i = NULL;
    double *t_save = NULL;
    double *q_save = NULL;
    double *t_r = NULL;
    double *q_r = NULL;

    /* Iniitialize the scalar parameters */
    init_scalars_dtrexc( &compq, &n, &ldt, &ldq, &ifst, &ilst );
    ldt_r = n+2;
    ldq_r = n+2;
    compq_i = compq;
    n_i = n;
    ldt_i = ldt;
    ldq_i = ldq;
    ifst_i = ifst_save = ifst;
    ilst_i = ilst_save = ilst;

    /* Allocate memory for the LAPACK routine arrays */
    t = (double *)LAPACKE_malloc( ldt*n * sizeof(double) );
    q = (double *)LAPACKE_malloc( ldq*n * sizeof(double) );
    work = (double *)LAPACKE_malloc( n * sizeof(double) );

    /* Allocate memory for the C interface function arrays */
    t_i = (double *)LAPACKE_malloc( ldt*n * sizeof(double) );
    q_i = (double *)LAPACKE_malloc( ldq*n * sizeof(double) );
    work_i = (double *)LAPACKE_malloc( n * sizeof(double) );

    /* Allocate memory for the backup arrays */
    t_save = (double *)LAPACKE_malloc( ldt*n * sizeof(double) );
    q_save = (double *)LAPACKE_malloc( ldq*n * sizeof(double) );

    /* Allocate memory for the row-major arrays */
    t_r = (double *)LAPACKE_malloc( n*(n+2) * sizeof(double) );
    q_r = (double *)LAPACKE_malloc( n*(n+2) * sizeof(double) );

    /* Initialize input arrays */
    init_t( ldt*n, t );
    init_q( ldq*n, q );
    init_work( n, work );

    /* Backup the ouptut arrays */
    for( i = 0; i < ldt*n; i++ ) {
        t_save[i] = t[i];
    }
    for( i = 0; i < ldq*n; i++ ) {
        q_save[i] = q[i];
    }

    /* Call the LAPACK routine */
    dtrexc_( &compq, &n, t, &ldt, q, &ldq, &ifst, &ilst, work, &info );

    /* Initialize input data, call the column-major middle-level
     * interface to LAPACK routine and check the results */
    ifst_i = ifst_save;
    ilst_i = ilst_save;
    for( i = 0; i < ldt*n; i++ ) {
        t_i[i] = t_save[i];
    }
    for( i = 0; i < ldq*n; i++ ) {
        q_i[i] = q_save[i];
    }
    for( i = 0; i < n; i++ ) {
        work_i[i] = work[i];
    }
    info_i = LAPACKE_dtrexc_work( LAPACK_COL_MAJOR, compq_i, n_i, t_i, ldt_i,
                                  q_i, ldq_i, &ifst_i, &ilst_i, work_i );

    failed = compare_dtrexc( t, t_i, q, q_i, ifst, ifst_i, ilst, ilst_i, info,
                             info_i, compq, ldq, ldt, n );
    if( failed == 0 ) {
        printf( "PASSED: column-major middle-level interface to dtrexc\n" );
    } else {
        printf( "FAILED: column-major middle-level interface to dtrexc\n" );
    }

    /* Initialize input data, call the column-major high-level
     * interface to LAPACK routine and check the results */
    ifst_i = ifst_save;
    ilst_i = ilst_save;
    for( i = 0; i < ldt*n; i++ ) {
        t_i[i] = t_save[i];
    }
    for( i = 0; i < ldq*n; i++ ) {
        q_i[i] = q_save[i];
    }
    for( i = 0; i < n; i++ ) {
        work_i[i] = work[i];
    }
    info_i = LAPACKE_dtrexc( LAPACK_COL_MAJOR, compq_i, n_i, t_i, ldt_i, q_i,
                             ldq_i, &ifst_i, &ilst_i );

    failed = compare_dtrexc( t, t_i, q, q_i, ifst, ifst_i, ilst, ilst_i, info,
                             info_i, compq, ldq, ldt, n );
    if( failed == 0 ) {
        printf( "PASSED: column-major high-level interface to dtrexc\n" );
    } else {
        printf( "FAILED: column-major high-level interface to dtrexc\n" );
    }

    /* Initialize input data, call the row-major middle-level
     * interface to LAPACK routine and check the results */
    ifst_i = ifst_save;
    ilst_i = ilst_save;
    for( i = 0; i < ldt*n; i++ ) {
        t_i[i] = t_save[i];
    }
    for( i = 0; i < ldq*n; i++ ) {
        q_i[i] = q_save[i];
    }
    for( i = 0; i < n; i++ ) {
        work_i[i] = work[i];
    }

    LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, t_i, ldt, t_r, n+2 );
    if( LAPACKE_lsame( compq, 'v' ) ) {
        LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_i, ldq, q_r, n+2 );
    }
    info_i = LAPACKE_dtrexc_work( LAPACK_ROW_MAJOR, compq_i, n_i, t_r, ldt_r,
                                  q_r, ldq_r, &ifst_i, &ilst_i, work_i );

    LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, t_r, n+2, t_i, ldt );
    if( LAPACKE_lsame( compq, 'v' ) ) {
        LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, q_r, n+2, q_i, ldq );
    }

    failed = compare_dtrexc( t, t_i, q, q_i, ifst, ifst_i, ilst, ilst_i, info,
                             info_i, compq, ldq, ldt, n );
    if( failed == 0 ) {
        printf( "PASSED: row-major middle-level interface to dtrexc\n" );
    } else {
        printf( "FAILED: row-major middle-level interface to dtrexc\n" );
    }

    /* Initialize input data, call the row-major high-level
     * interface to LAPACK routine and check the results */
    ifst_i = ifst_save;
    ilst_i = ilst_save;
    for( i = 0; i < ldt*n; i++ ) {
        t_i[i] = t_save[i];
    }
    for( i = 0; i < ldq*n; i++ ) {
        q_i[i] = q_save[i];
    }
    for( i = 0; i < n; i++ ) {
        work_i[i] = work[i];
    }

    /* Init row_major arrays */
    LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, t_i, ldt, t_r, n+2 );
    if( LAPACKE_lsame( compq, 'v' ) ) {
        LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_i, ldq, q_r, n+2 );
    }
    info_i = LAPACKE_dtrexc( LAPACK_ROW_MAJOR, compq_i, n_i, t_r, ldt_r, q_r,
                             ldq_r, &ifst_i, &ilst_i );

    LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, t_r, n+2, t_i, ldt );
    if( LAPACKE_lsame( compq, 'v' ) ) {
        LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, q_r, n+2, q_i, ldq );
    }

    failed = compare_dtrexc( t, t_i, q, q_i, ifst, ifst_i, ilst, ilst_i, info,
                             info_i, compq, ldq, ldt, n );
    if( failed == 0 ) {
        printf( "PASSED: row-major high-level interface to dtrexc\n" );
    } else {
        printf( "FAILED: row-major high-level interface to dtrexc\n" );
    }

    /* Release memory */
    if( t != NULL ) {
        LAPACKE_free( t );
    }
    if( t_i != NULL ) {
        LAPACKE_free( t_i );
    }
    if( t_r != NULL ) {
        LAPACKE_free( t_r );
    }
    if( t_save != NULL ) {
        LAPACKE_free( t_save );
    }
    if( q != NULL ) {
        LAPACKE_free( q );
    }
    if( q_i != NULL ) {
        LAPACKE_free( q_i );
    }
    if( q_r != NULL ) {
        LAPACKE_free( q_r );
    }
    if( q_save != NULL ) {
        LAPACKE_free( q_save );
    }
    if( work != NULL ) {
        LAPACKE_free( work );
    }
    if( work_i != NULL ) {
        LAPACKE_free( work_i );
    }

    return 0;
}

/* Auxiliary function: dtrexc scalar parameters initialization */
static void init_scalars_dtrexc( char *compq, lapack_int *n, lapack_int *ldt,
                                 lapack_int *ldq, lapack_int *ifst,
                                 lapack_int *ilst )
{
    *compq = 'N';
    *n = 4;
    *ldt = 8;
    *ldq = 1;
    *ifst = 2;
    *ilst = 1;

    return;
}

/* Auxiliary functions: dtrexc array parameters initialization */
static void init_t( lapack_int size, double *t ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        t[i] = 0;
    }
    t[0] = 8.00000000000000040e-001;  /* t[0,0] */
    t[8] = -1.10000000000000000e-001;  /* t[0,1] */
    t[16] = 1.00000000000000000e-002;  /* t[0,2] */
    t[24] = 2.99999999999999990e-002;  /* t[0,3] */
    t[1] = 0.00000000000000000e+000;  /* t[1,0] */
    t[9] = -1.00000000000000010e-001;  /* t[1,1] */
    t[17] = 2.50000000000000000e-001;  /* t[1,2] */
    t[25] = 3.49999999999999980e-001;  /* t[1,3] */
    t[2] = 0.00000000000000000e+000;  /* t[2,0] */
    t[10] = -6.50000000000000020e-001;  /* t[2,1] */
    t[18] = -1.00000000000000010e-001;  /* t[2,2] */
    t[26] = 2.00000000000000010e-001;  /* t[2,3] */
    t[3] = 0.00000000000000000e+000;  /* t[3,0] */
    t[11] = 0.00000000000000000e+000;  /* t[3,1] */
    t[19] = 0.00000000000000000e+000;  /* t[3,2] */
    t[27] = -1.00000000000000010e-001;  /* t[3,3] */
}
static void init_q( lapack_int size, double *q ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        q[i] = 0;
    }
    q[0] = 0.00000000000000000e+000;  /* q[0,0] */
    q[1] = 0.00000000000000000e+000;  /* q[0,1] */
    q[2] = 0.00000000000000000e+000;  /* q[0,2] */
    q[3] = 0.00000000000000000e+000;  /* q[0,3] */
    q[1] = 0.00000000000000000e+000;  /* q[1,0] */
    q[2] = 0.00000000000000000e+000;  /* q[1,1] */
    q[3] = 0.00000000000000000e+000;  /* q[1,2] */
    q[2] = 0.00000000000000000e+000;  /* q[2,0] */
    q[3] = 0.00000000000000000e+000;  /* q[2,1] */
    q[3] = 0.00000000000000000e+000;  /* q[3,0] */
}
static void init_work( lapack_int size, double *work ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        work[i] = 0;
    }
}

/* Auxiliary function: C interface to dtrexc results check */
/* Return value: 0 - test is passed, non-zero - test is failed */
static int compare_dtrexc( double *t, double *t_i, double *q, double *q_i,
                           lapack_int ifst, lapack_int ifst_i, lapack_int ilst,
                           lapack_int ilst_i, lapack_int info,
                           lapack_int info_i, char compq, lapack_int ldq,
                           lapack_int ldt, lapack_int n )
{
    lapack_int i;
    int failed = 0;
    for( i = 0; i < ldt*n; i++ ) {
        failed += compare_doubles(t[i],t_i[i]);
    }
    if( LAPACKE_lsame( compq, 'v' ) ) {
        for( i = 0; i < ldq*n; i++ ) {
            failed += compare_doubles(q[i],q_i[i]);
        }
    }
    failed += (ifst == ifst_i) ? 0 : 1;
    failed += (ilst == ilst_i) ? 0 : 1;
    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;
}