dsptrs_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 * dsptrs_1 is the test program for the C interface to LAPACK
00036 * routine dsptrs
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_dsptrs( char *uplo, lapack_int *n, lapack_int *nrhs,
00055                                  lapack_int *ldb );
00056 static void init_ap( lapack_int size, double *ap );
00057 static void init_ipiv( lapack_int size, lapack_int *ipiv );
00058 static void init_b( lapack_int size, double *b );
00059 static int compare_dsptrs( double *b, double *b_i, lapack_int info,
00060                            lapack_int info_i, lapack_int ldb, lapack_int nrhs );
00061 
00062 int main(void)
00063 {
00064     /* Local scalars */
00065     char uplo, uplo_i;
00066     lapack_int n, n_i;
00067     lapack_int nrhs, nrhs_i;
00068     lapack_int ldb, ldb_i;
00069     lapack_int ldb_r;
00070     lapack_int info, info_i;
00071     lapack_int i;
00072     int failed;
00073 
00074     /* Local arrays */
00075     double *ap = NULL, *ap_i = NULL;
00076     lapack_int *ipiv = NULL, *ipiv_i = NULL;
00077     double *b = NULL, *b_i = NULL;
00078     double *b_save = NULL;
00079     double *ap_r = NULL;
00080     double *b_r = NULL;
00081 
00082     /* Iniitialize the scalar parameters */
00083     init_scalars_dsptrs( &uplo, &n, &nrhs, &ldb );
00084     ldb_r = nrhs+2;
00085     uplo_i = uplo;
00086     n_i = n;
00087     nrhs_i = nrhs;
00088     ldb_i = ldb;
00089 
00090     /* Allocate memory for the LAPACK routine arrays */
00091     ap = (double *)LAPACKE_malloc( ((n*(n+1)/2)) * sizeof(double) );
00092     ipiv = (lapack_int *)LAPACKE_malloc( n * sizeof(lapack_int) );
00093     b = (double *)LAPACKE_malloc( ldb*nrhs * sizeof(double) );
00094 
00095     /* Allocate memory for the C interface function arrays */
00096     ap_i = (double *)LAPACKE_malloc( ((n*(n+1)/2)) * sizeof(double) );
00097     ipiv_i = (lapack_int *)LAPACKE_malloc( n * sizeof(lapack_int) );
00098     b_i = (double *)LAPACKE_malloc( ldb*nrhs * sizeof(double) );
00099 
00100     /* Allocate memory for the backup arrays */
00101     b_save = (double *)LAPACKE_malloc( ldb*nrhs * sizeof(double) );
00102 
00103     /* Allocate memory for the row-major arrays */
00104     ap_r = (double *)LAPACKE_malloc( n*(n+1)/2 * sizeof(double) );
00105     b_r = (double *)LAPACKE_malloc( n*(nrhs+2) * sizeof(double) );
00106 
00107     /* Initialize input arrays */
00108     init_ap( (n*(n+1)/2), ap );
00109     init_ipiv( n, ipiv );
00110     init_b( ldb*nrhs, b );
00111 
00112     /* Backup the ouptut arrays */
00113     for( i = 0; i < ldb*nrhs; i++ ) {
00114         b_save[i] = b[i];
00115     }
00116 
00117     /* Call the LAPACK routine */
00118     dsptrs_( &uplo, &n, &nrhs, ap, ipiv, b, &ldb, &info );
00119 
00120     /* Initialize input data, call the column-major middle-level
00121      * interface to LAPACK routine and check the results */
00122     for( i = 0; i < (n*(n+1)/2); i++ ) {
00123         ap_i[i] = ap[i];
00124     }
00125     for( i = 0; i < n; i++ ) {
00126         ipiv_i[i] = ipiv[i];
00127     }
00128     for( i = 0; i < ldb*nrhs; i++ ) {
00129         b_i[i] = b_save[i];
00130     }
00131     info_i = LAPACKE_dsptrs_work( LAPACK_COL_MAJOR, uplo_i, n_i, nrhs_i, ap_i,
00132                                   ipiv_i, b_i, ldb_i );
00133 
00134     failed = compare_dsptrs( b, b_i, info, info_i, ldb, nrhs );
00135     if( failed == 0 ) {
00136         printf( "PASSED: column-major middle-level interface to dsptrs\n" );
00137     } else {
00138         printf( "FAILED: column-major middle-level interface to dsptrs\n" );
00139     }
00140 
00141     /* Initialize input data, call the column-major high-level
00142      * interface to LAPACK routine and check the results */
00143     for( i = 0; i < (n*(n+1)/2); i++ ) {
00144         ap_i[i] = ap[i];
00145     }
00146     for( i = 0; i < n; i++ ) {
00147         ipiv_i[i] = ipiv[i];
00148     }
00149     for( i = 0; i < ldb*nrhs; i++ ) {
00150         b_i[i] = b_save[i];
00151     }
00152     info_i = LAPACKE_dsptrs( LAPACK_COL_MAJOR, uplo_i, n_i, nrhs_i, ap_i,
00153                              ipiv_i, b_i, ldb_i );
00154 
00155     failed = compare_dsptrs( b, b_i, info, info_i, ldb, nrhs );
00156     if( failed == 0 ) {
00157         printf( "PASSED: column-major high-level interface to dsptrs\n" );
00158     } else {
00159         printf( "FAILED: column-major high-level interface to dsptrs\n" );
00160     }
00161 
00162     /* Initialize input data, call the row-major middle-level
00163      * interface to LAPACK routine and check the results */
00164     for( i = 0; i < (n*(n+1)/2); i++ ) {
00165         ap_i[i] = ap[i];
00166     }
00167     for( i = 0; i < n; i++ ) {
00168         ipiv_i[i] = ipiv[i];
00169     }
00170     for( i = 0; i < ldb*nrhs; i++ ) {
00171         b_i[i] = b_save[i];
00172     }
00173 
00174     LAPACKE_dpp_trans( LAPACK_COL_MAJOR, uplo, n, ap_i, ap_r );
00175     LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_i, ldb, b_r, nrhs+2 );
00176     info_i = LAPACKE_dsptrs_work( LAPACK_ROW_MAJOR, uplo_i, n_i, nrhs_i, ap_r,
00177                                   ipiv_i, b_r, ldb_r );
00178 
00179     LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, nrhs, b_r, nrhs+2, b_i, ldb );
00180 
00181     failed = compare_dsptrs( b, b_i, info, info_i, ldb, nrhs );
00182     if( failed == 0 ) {
00183         printf( "PASSED: row-major middle-level interface to dsptrs\n" );
00184     } else {
00185         printf( "FAILED: row-major middle-level interface to dsptrs\n" );
00186     }
00187 
00188     /* Initialize input data, call the row-major high-level
00189      * interface to LAPACK routine and check the results */
00190     for( i = 0; i < (n*(n+1)/2); i++ ) {
00191         ap_i[i] = ap[i];
00192     }
00193     for( i = 0; i < n; i++ ) {
00194         ipiv_i[i] = ipiv[i];
00195     }
00196     for( i = 0; i < ldb*nrhs; i++ ) {
00197         b_i[i] = b_save[i];
00198     }
00199 
00200     /* Init row_major arrays */
00201     LAPACKE_dpp_trans( LAPACK_COL_MAJOR, uplo, n, ap_i, ap_r );
00202     LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_i, ldb, b_r, nrhs+2 );
00203     info_i = LAPACKE_dsptrs( LAPACK_ROW_MAJOR, uplo_i, n_i, nrhs_i, ap_r,
00204                              ipiv_i, b_r, ldb_r );
00205 
00206     LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, nrhs, b_r, nrhs+2, b_i, ldb );
00207 
00208     failed = compare_dsptrs( b, b_i, info, info_i, ldb, nrhs );
00209     if( failed == 0 ) {
00210         printf( "PASSED: row-major high-level interface to dsptrs\n" );
00211     } else {
00212         printf( "FAILED: row-major high-level interface to dsptrs\n" );
00213     }
00214 
00215     /* Release memory */
00216     if( ap != NULL ) {
00217         LAPACKE_free( ap );
00218     }
00219     if( ap_i != NULL ) {
00220         LAPACKE_free( ap_i );
00221     }
00222     if( ap_r != NULL ) {
00223         LAPACKE_free( ap_r );
00224     }
00225     if( ipiv != NULL ) {
00226         LAPACKE_free( ipiv );
00227     }
00228     if( ipiv_i != NULL ) {
00229         LAPACKE_free( ipiv_i );
00230     }
00231     if( b != NULL ) {
00232         LAPACKE_free( b );
00233     }
00234     if( b_i != NULL ) {
00235         LAPACKE_free( b_i );
00236     }
00237     if( b_r != NULL ) {
00238         LAPACKE_free( b_r );
00239     }
00240     if( b_save != NULL ) {
00241         LAPACKE_free( b_save );
00242     }
00243 
00244     return 0;
00245 }
00246 
00247 /* Auxiliary function: dsptrs scalar parameters initialization */
00248 static void init_scalars_dsptrs( char *uplo, lapack_int *n, lapack_int *nrhs,
00249                                  lapack_int *ldb )
00250 {
00251     *uplo = 'L';
00252     *n = 4;
00253     *nrhs = 2;
00254     *ldb = 8;
00255 
00256     return;
00257 }
00258 
00259 /* Auxiliary functions: dsptrs array parameters initialization */
00260 static void init_ap( lapack_int size, double *ap ) {
00261     lapack_int i;
00262     for( i = 0; i < size; i++ ) {
00263         ap[i] = 0;
00264     }
00265     ap[0] = 2.06999999999999980e+000;
00266     ap[1] = 4.20000000000000020e+000;
00267     ap[2] = 2.23041384055834070e-001;
00268     ap[3] = 6.53658376748910360e-001;
00269     ap[4] = 1.14999999999999990e+000;
00270     ap[5] = 8.11501032143910230e-001;
00271     ap[6] = -5.95969723778629450e-001;
00272     ap[7] = -2.59067708640519000e+000;
00273     ap[8] = 3.03084679550618070e-001;
00274     ap[9] = 4.07385198134887610e-001;
00275 }
00276 static void init_ipiv( lapack_int size, lapack_int *ipiv ) {
00277     lapack_int i;
00278     for( i = 0; i < size; i++ ) {
00279         ipiv[i] = 0;
00280     }
00281     ipiv[0] = -3;
00282     ipiv[1] = -3;
00283     ipiv[2] = 3;
00284     ipiv[3] = 4;
00285 }
00286 static void init_b( lapack_int size, double *b ) {
00287     lapack_int i;
00288     for( i = 0; i < size; i++ ) {
00289         b[i] = 0;
00290     }
00291     b[0] = -9.50000000000000000e+000;  /* b[0,0] */
00292     b[8] = 2.78500000000000010e+001;  /* b[0,1] */
00293     b[1] = -8.38000000000000080e+000;  /* b[1,0] */
00294     b[9] = 9.90000000000000040e+000;  /* b[1,1] */
00295     b[2] = -6.07000000000000030e+000;  /* b[2,0] */
00296     b[10] = 1.92500000000000000e+001;  /* b[2,1] */
00297     b[3] = -9.59999999999999960e-001;  /* b[3,0] */
00298     b[11] = 3.93000000000000020e+000;  /* b[3,1] */
00299 }
00300 
00301 /* Auxiliary function: C interface to dsptrs results check */
00302 /* Return value: 0 - test is passed, non-zero - test is failed */
00303 static int compare_dsptrs( double *b, double *b_i, lapack_int info,
00304                            lapack_int info_i, lapack_int ldb, lapack_int nrhs )
00305 {
00306     lapack_int i;
00307     int failed = 0;
00308     for( i = 0; i < ldb*nrhs; i++ ) {
00309         failed += compare_doubles(b[i],b_i[i]);
00310     }
00311     failed += (info == info_i) ? 0 : 1;
00312     if( info != 0 || info_i != 0 ) {
00313         printf( "info=%d, info_i=%d\n",(int)info,(int)info_i );
00314     }
00315 
00316     return failed;
00317 }


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