ssytrf_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 * ssytrf_1 is the test program for the C interface to LAPACK
00036 * routine ssytrf
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_ssytrf( char *uplo, lapack_int *n, lapack_int *lda,
00055                                  lapack_int *lwork );
00056 static void init_a( lapack_int size, float *a );
00057 static void init_ipiv( lapack_int size, lapack_int *ipiv );
00058 static void init_work( lapack_int size, float *work );
00059 static int compare_ssytrf( float *a, float *a_i, lapack_int *ipiv,
00060                            lapack_int *ipiv_i, lapack_int info,
00061                            lapack_int info_i, lapack_int lda, lapack_int n );
00062 
00063 int main(void)
00064 {
00065     /* Local scalars */
00066     char uplo, uplo_i;
00067     lapack_int n, n_i;
00068     lapack_int lda, lda_i;
00069     lapack_int lda_r;
00070     lapack_int lwork, lwork_i;
00071     lapack_int info, info_i;
00072     lapack_int i;
00073     int failed;
00074 
00075     /* Local arrays */
00076     float *a = NULL, *a_i = NULL;
00077     lapack_int *ipiv = NULL, *ipiv_i = NULL;
00078     float *work = NULL, *work_i = NULL;
00079     float *a_save = NULL;
00080     lapack_int *ipiv_save = NULL;
00081     float *a_r = NULL;
00082 
00083     /* Iniitialize the scalar parameters */
00084     init_scalars_ssytrf( &uplo, &n, &lda, &lwork );
00085     lda_r = n+2;
00086     uplo_i = uplo;
00087     n_i = n;
00088     lda_i = lda;
00089     lwork_i = lwork;
00090 
00091     /* Allocate memory for the LAPACK routine arrays */
00092     a = (float *)LAPACKE_malloc( lda*n * sizeof(float) );
00093     ipiv = (lapack_int *)LAPACKE_malloc( n * sizeof(lapack_int) );
00094     work = (float *)LAPACKE_malloc( lwork * sizeof(float) );
00095 
00096     /* Allocate memory for the C interface function arrays */
00097     a_i = (float *)LAPACKE_malloc( lda*n * sizeof(float) );
00098     ipiv_i = (lapack_int *)LAPACKE_malloc( n * sizeof(lapack_int) );
00099     work_i = (float *)LAPACKE_malloc( lwork * sizeof(float) );
00100 
00101     /* Allocate memory for the backup arrays */
00102     a_save = (float *)LAPACKE_malloc( lda*n * sizeof(float) );
00103     ipiv_save = (lapack_int *)LAPACKE_malloc( n * sizeof(lapack_int) );
00104 
00105     /* Allocate memory for the row-major arrays */
00106     a_r = (float *)LAPACKE_malloc( n*(n+2) * sizeof(float) );
00107 
00108     /* Initialize input arrays */
00109     init_a( lda*n, a );
00110     init_ipiv( n, ipiv );
00111     init_work( lwork, work );
00112 
00113     /* Backup the ouptut arrays */
00114     for( i = 0; i < lda*n; i++ ) {
00115         a_save[i] = a[i];
00116     }
00117     for( i = 0; i < n; i++ ) {
00118         ipiv_save[i] = ipiv[i];
00119     }
00120 
00121     /* Call the LAPACK routine */
00122     ssytrf_( &uplo, &n, a, &lda, ipiv, work, &lwork, &info );
00123 
00124     /* Initialize input data, call the column-major middle-level
00125      * interface to LAPACK routine and check the results */
00126     for( i = 0; i < lda*n; i++ ) {
00127         a_i[i] = a_save[i];
00128     }
00129     for( i = 0; i < n; i++ ) {
00130         ipiv_i[i] = ipiv_save[i];
00131     }
00132     for( i = 0; i < lwork; i++ ) {
00133         work_i[i] = work[i];
00134     }
00135     info_i = LAPACKE_ssytrf_work( LAPACK_COL_MAJOR, uplo_i, n_i, a_i, lda_i,
00136                                   ipiv_i, work_i, lwork_i );
00137 
00138     failed = compare_ssytrf( a, a_i, ipiv, ipiv_i, info, info_i, lda, n );
00139     if( failed == 0 ) {
00140         printf( "PASSED: column-major middle-level interface to ssytrf\n" );
00141     } else {
00142         printf( "FAILED: column-major middle-level interface to ssytrf\n" );
00143     }
00144 
00145     /* Initialize input data, call the column-major high-level
00146      * interface to LAPACK routine and check the results */
00147     for( i = 0; i < lda*n; i++ ) {
00148         a_i[i] = a_save[i];
00149     }
00150     for( i = 0; i < n; i++ ) {
00151         ipiv_i[i] = ipiv_save[i];
00152     }
00153     for( i = 0; i < lwork; i++ ) {
00154         work_i[i] = work[i];
00155     }
00156     info_i = LAPACKE_ssytrf( LAPACK_COL_MAJOR, uplo_i, n_i, a_i, lda_i,
00157                              ipiv_i );
00158 
00159     failed = compare_ssytrf( a, a_i, ipiv, ipiv_i, info, info_i, lda, n );
00160     if( failed == 0 ) {
00161         printf( "PASSED: column-major high-level interface to ssytrf\n" );
00162     } else {
00163         printf( "FAILED: column-major high-level interface to ssytrf\n" );
00164     }
00165 
00166     /* Initialize input data, call the row-major middle-level
00167      * interface to LAPACK routine and check the results */
00168     for( i = 0; i < lda*n; i++ ) {
00169         a_i[i] = a_save[i];
00170     }
00171     for( i = 0; i < n; i++ ) {
00172         ipiv_i[i] = ipiv_save[i];
00173     }
00174     for( i = 0; i < lwork; i++ ) {
00175         work_i[i] = work[i];
00176     }
00177 
00178     LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
00179     info_i = LAPACKE_ssytrf_work( LAPACK_ROW_MAJOR, uplo_i, n_i, a_r, lda_r,
00180                                   ipiv_i, work_i, lwork_i );
00181 
00182     LAPACKE_sge_trans( LAPACK_ROW_MAJOR, n, n, a_r, n+2, a_i, lda );
00183 
00184     failed = compare_ssytrf( a, a_i, ipiv, ipiv_i, info, info_i, lda, n );
00185     if( failed == 0 ) {
00186         printf( "PASSED: row-major middle-level interface to ssytrf\n" );
00187     } else {
00188         printf( "FAILED: row-major middle-level interface to ssytrf\n" );
00189     }
00190 
00191     /* Initialize input data, call the row-major high-level
00192      * interface to LAPACK routine and check the results */
00193     for( i = 0; i < lda*n; i++ ) {
00194         a_i[i] = a_save[i];
00195     }
00196     for( i = 0; i < n; i++ ) {
00197         ipiv_i[i] = ipiv_save[i];
00198     }
00199     for( i = 0; i < lwork; i++ ) {
00200         work_i[i] = work[i];
00201     }
00202 
00203     /* Init row_major arrays */
00204     LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
00205     info_i = LAPACKE_ssytrf( LAPACK_ROW_MAJOR, uplo_i, n_i, a_r, lda_r,
00206                              ipiv_i );
00207 
00208     LAPACKE_sge_trans( LAPACK_ROW_MAJOR, n, n, a_r, n+2, a_i, lda );
00209 
00210     failed = compare_ssytrf( a, a_i, ipiv, ipiv_i, info, info_i, lda, n );
00211     if( failed == 0 ) {
00212         printf( "PASSED: row-major high-level interface to ssytrf\n" );
00213     } else {
00214         printf( "FAILED: row-major high-level interface to ssytrf\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( ipiv != NULL ) {
00231         LAPACKE_free( ipiv );
00232     }
00233     if( ipiv_i != NULL ) {
00234         LAPACKE_free( ipiv_i );
00235     }
00236     if( ipiv_save != NULL ) {
00237         LAPACKE_free( ipiv_save );
00238     }
00239     if( work != NULL ) {
00240         LAPACKE_free( work );
00241     }
00242     if( work_i != NULL ) {
00243         LAPACKE_free( work_i );
00244     }
00245 
00246     return 0;
00247 }
00248 
00249 /* Auxiliary function: ssytrf scalar parameters initialization */
00250 static void init_scalars_ssytrf( char *uplo, lapack_int *n, lapack_int *lda,
00251                                  lapack_int *lwork )
00252 {
00253     *uplo = 'L';
00254     *n = 4;
00255     *lda = 8;
00256     *lwork = 512;
00257 
00258     return;
00259 }
00260 
00261 /* Auxiliary functions: ssytrf array parameters initialization */
00262 static void init_a( lapack_int size, float *a ) {
00263     lapack_int i;
00264     for( i = 0; i < size; i++ ) {
00265         a[i] = 0;
00266     }
00267     a[0] = 2.069999933e+000;  /* a[0,0] */
00268     a[8] = 0.000000000e+000;  /* a[0,1] */
00269     a[16] = 0.000000000e+000;  /* a[0,2] */
00270     a[24] = 0.000000000e+000;  /* a[0,3] */
00271     a[1] = 3.869999886e+000;  /* a[1,0] */
00272     a[9] = -2.099999934e-001;  /* a[1,1] */
00273     a[17] = 0.000000000e+000;  /* a[1,2] */
00274     a[25] = 0.000000000e+000;  /* a[1,3] */
00275     a[2] = 4.199999809e+000;  /* a[2,0] */
00276     a[10] = 1.870000005e+000;  /* a[2,1] */
00277     a[18] = 1.149999976e+000;  /* a[2,2] */
00278     a[26] = 0.000000000e+000;  /* a[2,3] */
00279     a[3] = -1.149999976e+000;  /* a[3,0] */
00280     a[11] = 6.299999952e-001;  /* a[3,1] */
00281     a[19] = 2.059999943e+000;  /* a[3,2] */
00282     a[27] = -1.809999943e+000;  /* a[3,3] */
00283 }
00284 static void init_ipiv( lapack_int size, lapack_int *ipiv ) {
00285     lapack_int i;
00286     for( i = 0; i < size; i++ ) {
00287         ipiv[i] = 0;
00288     }
00289 }
00290 static void init_work( lapack_int size, float *work ) {
00291     lapack_int i;
00292     for( i = 0; i < size; i++ ) {
00293         work[i] = 0;
00294     }
00295 }
00296 
00297 /* Auxiliary function: C interface to ssytrf results check */
00298 /* Return value: 0 - test is passed, non-zero - test is failed */
00299 static int compare_ssytrf( float *a, float *a_i, lapack_int *ipiv,
00300                            lapack_int *ipiv_i, lapack_int info,
00301                            lapack_int info_i, lapack_int lda, lapack_int n )
00302 {
00303     lapack_int i;
00304     int failed = 0;
00305     for( i = 0; i < lda*n; i++ ) {
00306         failed += compare_floats(a[i],a_i[i]);
00307     }
00308     for( i = 0; i < n; i++ ) {
00309         failed += (ipiv[i] == ipiv_i[i]) ? 0 : 1;
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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