zgetrs_1.c

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/*  Contents: test routine for C interface to LAPACK
*   Author: Intel Corporation
*   Created in March, 2010
*
* Purpose
*
* zgetrs_1 is the test program for the C interface to LAPACK
* routine zgetrs
* 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_zgetrs( char *trans, lapack_int *n, lapack_int *nrhs,
                                 lapack_int *lda, lapack_int *ldb );
static void init_a( lapack_int size, lapack_complex_double *a );
static void init_ipiv( lapack_int size, lapack_int *ipiv );
static void init_b( lapack_int size, lapack_complex_double *b );
static int compare_zgetrs( lapack_complex_double *b, lapack_complex_double *b_i,
                           lapack_int info, lapack_int info_i, lapack_int ldb,
                           lapack_int nrhs );

int main(void)
{
    /* Local scalars */
    char trans, trans_i;
    lapack_int n, n_i;
    lapack_int nrhs, nrhs_i;
    lapack_int lda, lda_i;
    lapack_int lda_r;
    lapack_int ldb, ldb_i;
    lapack_int ldb_r;
    lapack_int info, info_i;
    lapack_int i;
    int failed;

    /* Local arrays */
    lapack_complex_double *a = NULL, *a_i = NULL;
    lapack_int *ipiv = NULL, *ipiv_i = NULL;
    lapack_complex_double *b = NULL, *b_i = NULL;
    lapack_complex_double *b_save = NULL;
    lapack_complex_double *a_r = NULL;
    lapack_complex_double *b_r = NULL;

    /* Iniitialize the scalar parameters */
    init_scalars_zgetrs( &trans, &n, &nrhs, &lda, &ldb );
    lda_r = n+2;
    ldb_r = nrhs+2;
    trans_i = trans;
    n_i = n;
    nrhs_i = nrhs;
    lda_i = lda;
    ldb_i = ldb;

    /* Allocate memory for the LAPACK routine arrays */
    a = (lapack_complex_double *)
        LAPACKE_malloc( lda*n * sizeof(lapack_complex_double) );
    ipiv = (lapack_int *)LAPACKE_malloc( n * sizeof(lapack_int) );
    b = (lapack_complex_double *)
        LAPACKE_malloc( ldb*nrhs * sizeof(lapack_complex_double) );

    /* Allocate memory for the C interface function arrays */
    a_i = (lapack_complex_double *)
        LAPACKE_malloc( lda*n * sizeof(lapack_complex_double) );
    ipiv_i = (lapack_int *)LAPACKE_malloc( n * sizeof(lapack_int) );
    b_i = (lapack_complex_double *)
        LAPACKE_malloc( ldb*nrhs * sizeof(lapack_complex_double) );

    /* Allocate memory for the backup arrays */
    b_save = (lapack_complex_double *)
        LAPACKE_malloc( ldb*nrhs * sizeof(lapack_complex_double) );

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

    /* Initialize input arrays */
    init_a( lda*n, a );
    init_ipiv( n, ipiv );
    init_b( ldb*nrhs, b );

    /* Backup the ouptut arrays */
    for( i = 0; i < ldb*nrhs; i++ ) {
        b_save[i] = b[i];
    }

    /* Call the LAPACK routine */
    zgetrs_( &trans, &n, &nrhs, a, &lda, ipiv, b, &ldb, &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[i];
    }
    for( i = 0; i < n; i++ ) {
        ipiv_i[i] = ipiv[i];
    }
    for( i = 0; i < ldb*nrhs; i++ ) {
        b_i[i] = b_save[i];
    }
    info_i = LAPACKE_zgetrs_work( LAPACK_COL_MAJOR, trans_i, n_i, nrhs_i, a_i,
                                  lda_i, ipiv_i, b_i, ldb_i );

    failed = compare_zgetrs( b, b_i, info, info_i, ldb, nrhs );
    if( failed == 0 ) {
        printf( "PASSED: column-major middle-level interface to zgetrs\n" );
    } else {
        printf( "FAILED: column-major middle-level interface to zgetrs\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[i];
    }
    for( i = 0; i < n; i++ ) {
        ipiv_i[i] = ipiv[i];
    }
    for( i = 0; i < ldb*nrhs; i++ ) {
        b_i[i] = b_save[i];
    }
    info_i = LAPACKE_zgetrs( LAPACK_COL_MAJOR, trans_i, n_i, nrhs_i, a_i, lda_i,
                             ipiv_i, b_i, ldb_i );

    failed = compare_zgetrs( b, b_i, info, info_i, ldb, nrhs );
    if( failed == 0 ) {
        printf( "PASSED: column-major high-level interface to zgetrs\n" );
    } else {
        printf( "FAILED: column-major high-level interface to zgetrs\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[i];
    }
    for( i = 0; i < n; i++ ) {
        ipiv_i[i] = ipiv[i];
    }
    for( i = 0; i < ldb*nrhs; i++ ) {
        b_i[i] = b_save[i];
    }

    LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
    LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, b_i, ldb, b_r, nrhs+2 );
    info_i = LAPACKE_zgetrs_work( LAPACK_ROW_MAJOR, trans_i, n_i, nrhs_i, a_r,
                                  lda_r, ipiv_i, b_r, ldb_r );

    LAPACKE_zge_trans( LAPACK_ROW_MAJOR, n, nrhs, b_r, nrhs+2, b_i, ldb );

    failed = compare_zgetrs( b, b_i, info, info_i, ldb, nrhs );
    if( failed == 0 ) {
        printf( "PASSED: row-major middle-level interface to zgetrs\n" );
    } else {
        printf( "FAILED: row-major middle-level interface to zgetrs\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[i];
    }
    for( i = 0; i < n; i++ ) {
        ipiv_i[i] = ipiv[i];
    }
    for( i = 0; i < ldb*nrhs; i++ ) {
        b_i[i] = b_save[i];
    }

    /* Init row_major arrays */
    LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
    LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, b_i, ldb, b_r, nrhs+2 );
    info_i = LAPACKE_zgetrs( LAPACK_ROW_MAJOR, trans_i, n_i, nrhs_i, a_r, lda_r,
                             ipiv_i, b_r, ldb_r );

    LAPACKE_zge_trans( LAPACK_ROW_MAJOR, n, nrhs, b_r, nrhs+2, b_i, ldb );

    failed = compare_zgetrs( b, b_i, info, info_i, ldb, nrhs );
    if( failed == 0 ) {
        printf( "PASSED: row-major high-level interface to zgetrs\n" );
    } else {
        printf( "FAILED: row-major high-level interface to zgetrs\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( ipiv != NULL ) {
        LAPACKE_free( ipiv );
    }
    if( ipiv_i != NULL ) {
        LAPACKE_free( ipiv_i );
    }
    if( b != NULL ) {
        LAPACKE_free( b );
    }
    if( b_i != NULL ) {
        LAPACKE_free( b_i );
    }
    if( b_r != NULL ) {
        LAPACKE_free( b_r );
    }
    if( b_save != NULL ) {
        LAPACKE_free( b_save );
    }

    return 0;
}

/* Auxiliary function: zgetrs scalar parameters initialization */
static void init_scalars_zgetrs( char *trans, lapack_int *n, lapack_int *nrhs,
                                 lapack_int *lda, lapack_int *ldb )
{
    *trans = 'N';
    *n = 4;
    *nrhs = 2;
    *lda = 8;
    *ldb = 8;

    return;
}

/* Auxiliary functions: zgetrs array parameters initialization */
static void init_a( lapack_int size, lapack_complex_double *a ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        a[i] = lapack_make_complex_double( 0.0, 0.0 );
    }
    a[0] = lapack_make_complex_double( -3.29000000000000000e+000,
                                       -2.39000000000000010e+000 );
    a[8] = lapack_make_complex_double( -1.90999999999999990e+000,
                                       4.41999999999999990e+000 );
    a[16] = lapack_make_complex_double( -1.40000000000000010e-001,
                                        -1.35000000000000010e+000 );
    a[24] = lapack_make_complex_double( 1.72000000000000000e+000,
                                        1.35000000000000010e+000 );
    a[1] = lapack_make_complex_double( 2.37612026946940610e-001,
                                       2.55959652157085600e-001 );
    a[9] = lapack_make_complex_double( 4.89518063400297530e+000,
                                       -7.11362223485444090e-001 );
    a[17] = lapack_make_complex_double( -4.62279846639493950e-001,
                                        1.69661058768036190e+000 );
    a[25] = lapack_make_complex_double( 1.22685284406332770e+000,
                                        6.18973161911442920e-001 );
    a[2] = lapack_make_complex_double( -1.01952080889200600e-001,
                                       -7.01013533943711350e-001 );
    a[10] = lapack_make_complex_double( -6.69149643194321130e-001,
                                        3.68869854797165500e-001 );
    a[18] = lapack_make_complex_double( -5.14141091381023150e+000,
                                        -1.12996973466095300e+000 );
    a[26] = lapack_make_complex_double( 9.98257991519944880e-001,
                                        3.85015227576377740e-001 );
    a[3] = lapack_make_complex_double( -5.35854670359574790e-001,
                                       2.70727252935982880e-001 );
    a[11] = lapack_make_complex_double( -2.04021779458707920e-001,
                                        8.60118067998404510e-001 );
    a[19] = lapack_make_complex_double( 8.23304706394011040e-003,
                                        1.21063681991063470e-001 );
    a[27] = lapack_make_complex_double( 1.48239181074841820e-001,
                                        -1.25223998607584600e-001 );
}
static void init_ipiv( lapack_int size, lapack_int *ipiv ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        ipiv[i] = 0;
    }
    ipiv[0] = 3;
    ipiv[1] = 2;
    ipiv[2] = 3;
    ipiv[3] = 4;
}
static void init_b( lapack_int size, lapack_complex_double *b ) {
    lapack_int i;
    for( i = 0; i < size; i++ ) {
        b[i] = lapack_make_complex_double( 0.0, 0.0 );
    }
    b[0] = lapack_make_complex_double( 2.62600000000000020e+001,
                                       5.17800000000000010e+001 );
    b[8] = lapack_make_complex_double( 3.13200000000000000e+001,
                                       -6.70000000000000020e+000 );
    b[1] = lapack_make_complex_double( 6.42999999999999970e+000,
                                       -8.67999999999999970e+000 );
    b[9] = lapack_make_complex_double( 1.58599999999999990e+001,
                                       -1.41999999999999990e+000 );
    b[2] = lapack_make_complex_double( -5.75000000000000000e+000,
                                       2.53099999999999990e+001 );
    b[10] = lapack_make_complex_double( -2.14999999999999990e+000,
                                        3.01900000000000010e+001 );
    b[3] = lapack_make_complex_double( 1.15999999999999990e+000,
                                       2.56999999999999980e+000 );
    b[11] = lapack_make_complex_double( -2.56000000000000010e+000,
                                        7.54999999999999980e+000 );
}

/* Auxiliary function: C interface to zgetrs results check */
/* Return value: 0 - test is passed, non-zero - test is failed */
static int compare_zgetrs( lapack_complex_double *b, lapack_complex_double *b_i,
                           lapack_int info, lapack_int info_i, lapack_int ldb,
                           lapack_int nrhs )
{
    lapack_int i;
    int failed = 0;
    for( i = 0; i < ldb*nrhs; i++ ) {
        failed += compare_complex_doubles(b[i],b_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;
}