dgebal_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 * dgebal_1 is the test program for the C interface to LAPACK
00036 * routine dgebal
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_dgebal( char *job, lapack_int *n, lapack_int *lda );
00055 static void init_a( lapack_int size, double *a );
00056 static void init_scale( lapack_int size, double *scale );
00057 static int compare_dgebal( double *a, double *a_i, lapack_int ilo,
00058                            lapack_int ilo_i, lapack_int ihi, lapack_int ihi_i,
00059                            double *scale, double *scale_i, lapack_int info,
00060                            lapack_int info_i, char job, lapack_int lda,
00061                            lapack_int n );
00062 
00063 int main(void)
00064 {
00065     /* Local scalars */
00066     char job, job_i;
00067     lapack_int n, n_i;
00068     lapack_int lda, lda_i;
00069     lapack_int lda_r;
00070     lapack_int ilo, ilo_i;
00071     lapack_int ihi, ihi_i;
00072     lapack_int info, info_i;
00073     lapack_int i;
00074     int failed;
00075 
00076     /* Local arrays */
00077     double *a = NULL, *a_i = NULL;
00078     double *scale = NULL, *scale_i = NULL;
00079     double *a_save = NULL;
00080     double *scale_save = NULL;
00081     double *a_r = NULL;
00082 
00083     /* Iniitialize the scalar parameters */
00084     init_scalars_dgebal( &job, &n, &lda );
00085     lda_r = n+2;
00086     job_i = job;
00087     n_i = n;
00088     lda_i = lda;
00089 
00090     /* Allocate memory for the LAPACK routine arrays */
00091     a = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
00092     scale = (double *)LAPACKE_malloc( n * sizeof(double) );
00093 
00094     /* Allocate memory for the C interface function arrays */
00095     a_i = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
00096     scale_i = (double *)LAPACKE_malloc( n * sizeof(double) );
00097 
00098     /* Allocate memory for the backup arrays */
00099     a_save = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
00100     scale_save = (double *)LAPACKE_malloc( n * sizeof(double) );
00101 
00102     /* Allocate memory for the row-major arrays */
00103     a_r = (double *)LAPACKE_malloc( n*(n+2) * sizeof(double) );
00104 
00105     /* Initialize input arrays */
00106     init_a( lda*n, a );
00107     init_scale( n, scale );
00108 
00109     /* Backup the ouptut arrays */
00110     for( i = 0; i < lda*n; i++ ) {
00111         a_save[i] = a[i];
00112     }
00113     for( i = 0; i < n; i++ ) {
00114         scale_save[i] = scale[i];
00115     }
00116 
00117     /* Call the LAPACK routine */
00118     dgebal_( &job, &n, a, &lda, &ilo, &ihi, scale, &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 < lda*n; i++ ) {
00123         a_i[i] = a_save[i];
00124     }
00125     for( i = 0; i < n; i++ ) {
00126         scale_i[i] = scale_save[i];
00127     }
00128     info_i = LAPACKE_dgebal_work( LAPACK_COL_MAJOR, job_i, n_i, a_i, lda_i,
00129                                   &ilo_i, &ihi_i, scale_i );
00130 
00131     failed = compare_dgebal( a, a_i, ilo, ilo_i, ihi, ihi_i, scale, scale_i,
00132                              info, info_i, job, lda, n );
00133     if( failed == 0 ) {
00134         printf( "PASSED: column-major middle-level interface to dgebal\n" );
00135     } else {
00136         printf( "FAILED: column-major middle-level interface to dgebal\n" );
00137     }
00138 
00139     /* Initialize input data, call the column-major high-level
00140      * interface to LAPACK routine and check the results */
00141     for( i = 0; i < lda*n; i++ ) {
00142         a_i[i] = a_save[i];
00143     }
00144     for( i = 0; i < n; i++ ) {
00145         scale_i[i] = scale_save[i];
00146     }
00147     info_i = LAPACKE_dgebal( LAPACK_COL_MAJOR, job_i, n_i, a_i, lda_i, &ilo_i,
00148                              &ihi_i, scale_i );
00149 
00150     failed = compare_dgebal( a, a_i, ilo, ilo_i, ihi, ihi_i, scale, scale_i,
00151                              info, info_i, job, lda, n );
00152     if( failed == 0 ) {
00153         printf( "PASSED: column-major high-level interface to dgebal\n" );
00154     } else {
00155         printf( "FAILED: column-major high-level interface to dgebal\n" );
00156     }
00157 
00158     /* Initialize input data, call the row-major middle-level
00159      * interface to LAPACK routine and check the results */
00160     for( i = 0; i < lda*n; i++ ) {
00161         a_i[i] = a_save[i];
00162     }
00163     for( i = 0; i < n; i++ ) {
00164         scale_i[i] = scale_save[i];
00165     }
00166 
00167     if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'p' ) ||
00168         LAPACKE_lsame( job, 's' ) ) {
00169         LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
00170     }
00171     info_i = LAPACKE_dgebal_work( LAPACK_ROW_MAJOR, job_i, n_i, a_r, lda_r,
00172                                   &ilo_i, &ihi_i, scale_i );
00173 
00174     if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'p' ) ||
00175         LAPACKE_lsame( job, 's' ) ) {
00176         LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, a_r, n+2, a_i, lda );
00177     }
00178 
00179     failed = compare_dgebal( a, a_i, ilo, ilo_i, ihi, ihi_i, scale, scale_i,
00180                              info, info_i, job, lda, n );
00181     if( failed == 0 ) {
00182         printf( "PASSED: row-major middle-level interface to dgebal\n" );
00183     } else {
00184         printf( "FAILED: row-major middle-level interface to dgebal\n" );
00185     }
00186 
00187     /* Initialize input data, call the row-major high-level
00188      * interface to LAPACK routine and check the results */
00189     for( i = 0; i < lda*n; i++ ) {
00190         a_i[i] = a_save[i];
00191     }
00192     for( i = 0; i < n; i++ ) {
00193         scale_i[i] = scale_save[i];
00194     }
00195 
00196     /* Init row_major arrays */
00197     if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'p' ) ||
00198         LAPACKE_lsame( job, 's' ) ) {
00199         LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
00200     }
00201     info_i = LAPACKE_dgebal( LAPACK_ROW_MAJOR, job_i, n_i, a_r, lda_r, &ilo_i,
00202                              &ihi_i, scale_i );
00203 
00204     if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'p' ) ||
00205         LAPACKE_lsame( job, 's' ) ) {
00206         LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, a_r, n+2, a_i, lda );
00207     }
00208 
00209     failed = compare_dgebal( a, a_i, ilo, ilo_i, ihi, ihi_i, scale, scale_i,
00210                              info, info_i, job, lda, n );
00211     if( failed == 0 ) {
00212         printf( "PASSED: row-major high-level interface to dgebal\n" );
00213     } else {
00214         printf( "FAILED: row-major high-level interface to dgebal\n" );
00215     }
00216 
00217     /* Release memory */
00218     if( a != NULL ) {
00219         LAPACKE_free( a );
00220     }
00221     if( a_i != NULL ) {
00222         LAPACKE_free( a_i );
00223     }
00224     if( a_r != NULL ) {
00225         LAPACKE_free( a_r );
00226     }
00227     if( a_save != NULL ) {
00228         LAPACKE_free( a_save );
00229     }
00230     if( scale != NULL ) {
00231         LAPACKE_free( scale );
00232     }
00233     if( scale_i != NULL ) {
00234         LAPACKE_free( scale_i );
00235     }
00236     if( scale_save != NULL ) {
00237         LAPACKE_free( scale_save );
00238     }
00239 
00240     return 0;
00241 }
00242 
00243 /* Auxiliary function: dgebal scalar parameters initialization */
00244 static void init_scalars_dgebal( char *job, lapack_int *n, lapack_int *lda )
00245 {
00246     *job = 'B';
00247     *n = 4;
00248     *lda = 8;
00249 
00250     return;
00251 }
00252 
00253 /* Auxiliary functions: dgebal array parameters initialization */
00254 static void init_a( lapack_int size, double *a ) {
00255     lapack_int i;
00256     for( i = 0; i < size; i++ ) {
00257         a[i] = 0;
00258     }
00259     a[0] = 5.13999999999999970e+000;  /* a[0,0] */
00260     a[8] = 9.10000000000000030e-001;  /* a[0,1] */
00261     a[16] = 0.00000000000000000e+000;  /* a[0,2] */
00262     a[24] = -3.27999999999999970e+001;  /* a[0,3] */
00263     a[1] = 9.10000000000000030e-001;  /* a[1,0] */
00264     a[9] = 2.00000000000000010e-001;  /* a[1,1] */
00265     a[17] = 0.00000000000000000e+000;  /* a[1,2] */
00266     a[25] = 3.45000000000000000e+001;  /* a[1,3] */
00267     a[2] = 1.89999999999999990e+000;  /* a[2,0] */
00268     a[10] = 8.00000000000000040e-001;  /* a[2,1] */
00269     a[18] = -4.00000000000000020e-001;  /* a[2,2] */
00270     a[26] = -3.00000000000000000e+000;  /* a[2,3] */
00271     a[3] = -3.30000000000000020e-001;  /* a[3,0] */
00272     a[11] = 3.49999999999999980e-001;  /* a[3,1] */
00273     a[19] = 0.00000000000000000e+000;  /* a[3,2] */
00274     a[27] = 6.60000000000000030e-001;  /* a[3,3] */
00275 }
00276 static void init_scale( lapack_int size, double *scale ) {
00277     lapack_int i;
00278     for( i = 0; i < size; i++ ) {
00279         scale[i] = 0;
00280     }
00281 }
00282 
00283 /* Auxiliary function: C interface to dgebal results check */
00284 /* Return value: 0 - test is passed, non-zero - test is failed */
00285 static int compare_dgebal( double *a, double *a_i, lapack_int ilo,
00286                            lapack_int ilo_i, lapack_int ihi, lapack_int ihi_i,
00287                            double *scale, double *scale_i, lapack_int info,
00288                            lapack_int info_i, char job, lapack_int lda,
00289                            lapack_int n )
00290 {
00291     lapack_int i;
00292     int failed = 0;
00293     if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'p' ) ||
00294         LAPACKE_lsame( job, 's' ) ) {
00295         for( i = 0; i < lda*n; i++ ) {
00296             failed += compare_doubles(a[i],a_i[i]);
00297         }
00298     }
00299     failed += (ilo == ilo_i) ? 0 : 1;
00300     failed += (ihi == ihi_i) ? 0 : 1;
00301     for( i = 0; i < n; i++ ) {
00302         failed += compare_doubles(scale[i],scale_i[i]);
00303     }
00304     failed += (info == info_i) ? 0 : 1;
00305     if( info != 0 || info_i != 0 ) {
00306         printf( "info=%d, info_i=%d\n",(int)info,(int)info_i );
00307     }
00308 
00309     return failed;
00310 }


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