dgehrd_1.c
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00029 /*  Contents: test routine for C interface to LAPACK
00030 *   Author: Intel Corporation
00031 *   Created in March, 2010
00032 *
00033 * Purpose
00034 *
00035 * dgehrd_1 is the test program for the C interface to LAPACK
00036 * routine dgehrd
00037 * The program doesn't require an input, the input data is hardcoded in the
00038 * test program.
00039 * The program tests the C interface in the four combinations:
00040 *   1) column-major layout, middle-level interface
00041 *   2) column-major layout, high-level interface
00042 *   3) row-major layout, middle-level interface
00043 *   4) row-major layout, high-level interface
00044 * The output of the C interface function is compared to those obtained from
00045 * the corresponiding LAPACK routine with the same input data, and the
00046 * comparison diagnostics is then printed on the standard output having PASSED
00047 * keyword if the test is passed, and FAILED keyword if the test isn't passed.
00048 *****************************************************************************/
00049 #include <stdio.h>
00050 #include "lapacke.h"
00051 #include "lapacke_utils.h"
00052 #include "test_utils.h"
00053 
00054 static void init_scalars_dgehrd( lapack_int *n, lapack_int *ilo,
00055                                  lapack_int *ihi, lapack_int *lda,
00056                                  lapack_int *lwork );
00057 static void init_a( lapack_int size, double *a );
00058 static void init_tau( lapack_int size, double *tau );
00059 static void init_work( lapack_int size, double *work );
00060 static int compare_dgehrd( double *a, double *a_i, double *tau, double *tau_i,
00061                            lapack_int info, lapack_int info_i, lapack_int lda,
00062                            lapack_int n );
00063 
00064 int main(void)
00065 {
00066     /* Local scalars */
00067     lapack_int n, n_i;
00068     lapack_int ilo, ilo_i;
00069     lapack_int ihi, ihi_i;
00070     lapack_int lda, lda_i;
00071     lapack_int lda_r;
00072     lapack_int lwork, lwork_i;
00073     lapack_int info, info_i;
00074     lapack_int i;
00075     int failed;
00076 
00077     /* Local arrays */
00078     double *a = NULL, *a_i = NULL;
00079     double *tau = NULL, *tau_i = NULL;
00080     double *work = NULL, *work_i = NULL;
00081     double *a_save = NULL;
00082     double *tau_save = NULL;
00083     double *a_r = NULL;
00084 
00085     /* Iniitialize the scalar parameters */
00086     init_scalars_dgehrd( &n, &ilo, &ihi, &lda, &lwork );
00087     lda_r = n+2;
00088     n_i = n;
00089     ilo_i = ilo;
00090     ihi_i = ihi;
00091     lda_i = lda;
00092     lwork_i = lwork;
00093 
00094     /* Allocate memory for the LAPACK routine arrays */
00095     a = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
00096     tau = (double *)LAPACKE_malloc( (n-1) * sizeof(double) );
00097     work = (double *)LAPACKE_malloc( lwork * sizeof(double) );
00098 
00099     /* Allocate memory for the C interface function arrays */
00100     a_i = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
00101     tau_i = (double *)LAPACKE_malloc( (n-1) * sizeof(double) );
00102     work_i = (double *)LAPACKE_malloc( lwork * sizeof(double) );
00103 
00104     /* Allocate memory for the backup arrays */
00105     a_save = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
00106     tau_save = (double *)LAPACKE_malloc( (n-1) * sizeof(double) );
00107 
00108     /* Allocate memory for the row-major arrays */
00109     a_r = (double *)LAPACKE_malloc( n*(n+2) * sizeof(double) );
00110 
00111     /* Initialize input arrays */
00112     init_a( lda*n, a );
00113     init_tau( (n-1), tau );
00114     init_work( lwork, work );
00115 
00116     /* Backup the ouptut arrays */
00117     for( i = 0; i < lda*n; i++ ) {
00118         a_save[i] = a[i];
00119     }
00120     for( i = 0; i < (n-1); i++ ) {
00121         tau_save[i] = tau[i];
00122     }
00123 
00124     /* Call the LAPACK routine */
00125     dgehrd_( &n, &ilo, &ihi, a, &lda, tau, work, &lwork, &info );
00126 
00127     /* Initialize input data, call the column-major middle-level
00128      * interface to LAPACK routine and check the results */
00129     for( i = 0; i < lda*n; i++ ) {
00130         a_i[i] = a_save[i];
00131     }
00132     for( i = 0; i < (n-1); i++ ) {
00133         tau_i[i] = tau_save[i];
00134     }
00135     for( i = 0; i < lwork; i++ ) {
00136         work_i[i] = work[i];
00137     }
00138     info_i = LAPACKE_dgehrd_work( LAPACK_COL_MAJOR, n_i, ilo_i, ihi_i, a_i,
00139                                   lda_i, tau_i, work_i, lwork_i );
00140 
00141     failed = compare_dgehrd( a, a_i, tau, tau_i, info, info_i, lda, n );
00142     if( failed == 0 ) {
00143         printf( "PASSED: column-major middle-level interface to dgehrd\n" );
00144     } else {
00145         printf( "FAILED: column-major middle-level interface to dgehrd\n" );
00146     }
00147 
00148     /* Initialize input data, call the column-major high-level
00149      * interface to LAPACK routine and check the results */
00150     for( i = 0; i < lda*n; i++ ) {
00151         a_i[i] = a_save[i];
00152     }
00153     for( i = 0; i < (n-1); i++ ) {
00154         tau_i[i] = tau_save[i];
00155     }
00156     for( i = 0; i < lwork; i++ ) {
00157         work_i[i] = work[i];
00158     }
00159     info_i = LAPACKE_dgehrd( LAPACK_COL_MAJOR, n_i, ilo_i, ihi_i, a_i, lda_i,
00160                              tau_i );
00161 
00162     failed = compare_dgehrd( a, a_i, tau, tau_i, info, info_i, lda, n );
00163     if( failed == 0 ) {
00164         printf( "PASSED: column-major high-level interface to dgehrd\n" );
00165     } else {
00166         printf( "FAILED: column-major high-level interface to dgehrd\n" );
00167     }
00168 
00169     /* Initialize input data, call the row-major middle-level
00170      * interface to LAPACK routine and check the results */
00171     for( i = 0; i < lda*n; i++ ) {
00172         a_i[i] = a_save[i];
00173     }
00174     for( i = 0; i < (n-1); i++ ) {
00175         tau_i[i] = tau_save[i];
00176     }
00177     for( i = 0; i < lwork; i++ ) {
00178         work_i[i] = work[i];
00179     }
00180 
00181     LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
00182     info_i = LAPACKE_dgehrd_work( LAPACK_ROW_MAJOR, n_i, ilo_i, ihi_i, a_r,
00183                                   lda_r, tau_i, work_i, lwork_i );
00184 
00185     LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, a_r, n+2, a_i, lda );
00186 
00187     failed = compare_dgehrd( a, a_i, tau, tau_i, info, info_i, lda, n );
00188     if( failed == 0 ) {
00189         printf( "PASSED: row-major middle-level interface to dgehrd\n" );
00190     } else {
00191         printf( "FAILED: row-major middle-level interface to dgehrd\n" );
00192     }
00193 
00194     /* Initialize input data, call the row-major high-level
00195      * interface to LAPACK routine and check the results */
00196     for( i = 0; i < lda*n; i++ ) {
00197         a_i[i] = a_save[i];
00198     }
00199     for( i = 0; i < (n-1); i++ ) {
00200         tau_i[i] = tau_save[i];
00201     }
00202     for( i = 0; i < lwork; i++ ) {
00203         work_i[i] = work[i];
00204     }
00205 
00206     /* Init row_major arrays */
00207     LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
00208     info_i = LAPACKE_dgehrd( LAPACK_ROW_MAJOR, n_i, ilo_i, ihi_i, a_r, lda_r,
00209                              tau_i );
00210 
00211     LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, a_r, n+2, a_i, lda );
00212 
00213     failed = compare_dgehrd( a, a_i, tau, tau_i, info, info_i, lda, n );
00214     if( failed == 0 ) {
00215         printf( "PASSED: row-major high-level interface to dgehrd\n" );
00216     } else {
00217         printf( "FAILED: row-major high-level interface to dgehrd\n" );
00218     }
00219 
00220     /* Release memory */
00221     if( a != NULL ) {
00222         LAPACKE_free( a );
00223     }
00224     if( a_i != NULL ) {
00225         LAPACKE_free( a_i );
00226     }
00227     if( a_r != NULL ) {
00228         LAPACKE_free( a_r );
00229     }
00230     if( a_save != NULL ) {
00231         LAPACKE_free( a_save );
00232     }
00233     if( tau != NULL ) {
00234         LAPACKE_free( tau );
00235     }
00236     if( tau_i != NULL ) {
00237         LAPACKE_free( tau_i );
00238     }
00239     if( tau_save != NULL ) {
00240         LAPACKE_free( tau_save );
00241     }
00242     if( work != NULL ) {
00243         LAPACKE_free( work );
00244     }
00245     if( work_i != NULL ) {
00246         LAPACKE_free( work_i );
00247     }
00248 
00249     return 0;
00250 }
00251 
00252 /* Auxiliary function: dgehrd scalar parameters initialization */
00253 static void init_scalars_dgehrd( lapack_int *n, lapack_int *ilo,
00254                                  lapack_int *ihi, lapack_int *lda,
00255                                  lapack_int *lwork )
00256 {
00257     *n = 4;
00258     *ilo = 2;
00259     *ihi = 4;
00260     *lda = 8;
00261     *lwork = 512;
00262 
00263     return;
00264 }
00265 
00266 /* Auxiliary functions: dgehrd array parameters initialization */
00267 static void init_a( lapack_int size, double *a ) {
00268     lapack_int i;
00269     for( i = 0; i < size; i++ ) {
00270         a[i] = 0;
00271     }
00272     a[0] = -4.00000000000000020e-001;  /* a[0,0] */
00273     a[8] = 3.20000000000000020e+000;  /* a[0,1] */
00274     a[16] = 7.59999999999999960e+000;  /* a[0,2] */
00275     a[24] = -1.50000000000000000e+000;  /* a[0,3] */
00276     a[1] = 0.00000000000000000e+000;  /* a[1,0] */
00277     a[9] = 2.00000000000000010e-001;  /* a[1,1] */
00278     a[17] = 9.10000000000000030e-001;  /* a[1,2] */
00279     a[25] = 4.31250000000000000e+000;  /* a[1,3] */
00280     a[2] = 0.00000000000000000e+000;  /* a[2,0] */
00281     a[10] = 9.10000000000000030e-001;  /* a[2,1] */
00282     a[18] = 5.13999999999999970e+000;  /* a[2,2] */
00283     a[26] = -4.09999999999999960e+000;  /* a[2,3] */
00284     a[3] = 0.00000000000000000e+000;  /* a[3,0] */
00285     a[11] = 2.79999999999999980e+000;  /* a[3,1] */
00286     a[19] = -2.64000000000000010e+000;  /* a[3,2] */
00287     a[27] = 6.60000000000000030e-001;  /* a[3,3] */
00288 }
00289 static void init_tau( lapack_int size, double *tau ) {
00290     lapack_int i;
00291     for( i = 0; i < size; i++ ) {
00292         tau[i] = 0;
00293     }
00294 }
00295 static void init_work( lapack_int size, double *work ) {
00296     lapack_int i;
00297     for( i = 0; i < size; i++ ) {
00298         work[i] = 0;
00299     }
00300 }
00301 
00302 /* Auxiliary function: C interface to dgehrd results check */
00303 /* Return value: 0 - test is passed, non-zero - test is failed */
00304 static int compare_dgehrd( double *a, double *a_i, double *tau, double *tau_i,
00305                            lapack_int info, lapack_int info_i, lapack_int lda,
00306                            lapack_int n )
00307 {
00308     lapack_int i;
00309     int failed = 0;
00310     for( i = 0; i < lda*n; i++ ) {
00311         failed += compare_doubles(a[i],a_i[i]);
00312     }
00313     for( i = 0; i < (n-1); i++ ) {
00314         failed += compare_doubles(tau[i],tau_i[i]);
00315     }
00316     failed += (info == info_i) ? 0 : 1;
00317     if( info != 0 || info_i != 0 ) {
00318         printf( "info=%d, info_i=%d\n",(int)info,(int)info_i );
00319     }
00320 
00321     return failed;
00322 }


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