dpotri_1.c
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00002   Copyright (c) 2010, Intel Corp.
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00004 
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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 * dpotri_1 is the test program for the C interface to LAPACK
00036 * routine dpotri
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_dpotri( char *uplo, lapack_int *n, lapack_int *lda );
00055 static void init_a( lapack_int size, double *a );
00056 static int compare_dpotri( double *a, double *a_i, lapack_int info,
00057                            lapack_int info_i, lapack_int lda, lapack_int n );
00058 
00059 int main(void)
00060 {
00061     /* Local scalars */
00062     char uplo, uplo_i;
00063     lapack_int n, n_i;
00064     lapack_int lda, lda_i;
00065     lapack_int lda_r;
00066     lapack_int info, info_i;
00067     lapack_int i;
00068     int failed;
00069 
00070     /* Local arrays */
00071     double *a = NULL, *a_i = NULL;
00072     double *a_save = NULL;
00073     double *a_r = NULL;
00074 
00075     /* Iniitialize the scalar parameters */
00076     init_scalars_dpotri( &uplo, &n, &lda );
00077     lda_r = n+2;
00078     uplo_i = uplo;
00079     n_i = n;
00080     lda_i = lda;
00081 
00082     /* Allocate memory for the LAPACK routine arrays */
00083     a = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
00084 
00085     /* Allocate memory for the C interface function arrays */
00086     a_i = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
00087 
00088     /* Allocate memory for the backup arrays */
00089     a_save = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
00090 
00091     /* Allocate memory for the row-major arrays */
00092     a_r = (double *)LAPACKE_malloc( n*(n+2) * sizeof(double) );
00093 
00094     /* Initialize input arrays */
00095     init_a( lda*n, a );
00096 
00097     /* Backup the ouptut arrays */
00098     for( i = 0; i < lda*n; i++ ) {
00099         a_save[i] = a[i];
00100     }
00101 
00102     /* Call the LAPACK routine */
00103     dpotri_( &uplo, &n, a, &lda, &info );
00104 
00105     /* Initialize input data, call the column-major middle-level
00106      * interface to LAPACK routine and check the results */
00107     for( i = 0; i < lda*n; i++ ) {
00108         a_i[i] = a_save[i];
00109     }
00110     info_i = LAPACKE_dpotri_work( LAPACK_COL_MAJOR, uplo_i, n_i, a_i, lda_i );
00111 
00112     failed = compare_dpotri( a, a_i, info, info_i, lda, n );
00113     if( failed == 0 ) {
00114         printf( "PASSED: column-major middle-level interface to dpotri\n" );
00115     } else {
00116         printf( "FAILED: column-major middle-level interface to dpotri\n" );
00117     }
00118 
00119     /* Initialize input data, call the column-major high-level
00120      * interface to LAPACK routine and check the results */
00121     for( i = 0; i < lda*n; i++ ) {
00122         a_i[i] = a_save[i];
00123     }
00124     info_i = LAPACKE_dpotri( LAPACK_COL_MAJOR, uplo_i, n_i, a_i, lda_i );
00125 
00126     failed = compare_dpotri( a, a_i, info, info_i, lda, n );
00127     if( failed == 0 ) {
00128         printf( "PASSED: column-major high-level interface to dpotri\n" );
00129     } else {
00130         printf( "FAILED: column-major high-level interface to dpotri\n" );
00131     }
00132 
00133     /* Initialize input data, call the row-major middle-level
00134      * interface to LAPACK routine and check the results */
00135     for( i = 0; i < lda*n; i++ ) {
00136         a_i[i] = a_save[i];
00137     }
00138 
00139     LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
00140     info_i = LAPACKE_dpotri_work( LAPACK_ROW_MAJOR, uplo_i, n_i, a_r, lda_r );
00141 
00142     LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, a_r, n+2, a_i, lda );
00143 
00144     failed = compare_dpotri( a, a_i, info, info_i, lda, n );
00145     if( failed == 0 ) {
00146         printf( "PASSED: row-major middle-level interface to dpotri\n" );
00147     } else {
00148         printf( "FAILED: row-major middle-level interface to dpotri\n" );
00149     }
00150 
00151     /* Initialize input data, call the row-major high-level
00152      * interface to LAPACK routine and check the results */
00153     for( i = 0; i < lda*n; i++ ) {
00154         a_i[i] = a_save[i];
00155     }
00156 
00157     /* Init row_major arrays */
00158     LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
00159     info_i = LAPACKE_dpotri( LAPACK_ROW_MAJOR, uplo_i, n_i, a_r, lda_r );
00160 
00161     LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, a_r, n+2, a_i, lda );
00162 
00163     failed = compare_dpotri( a, a_i, info, info_i, lda, n );
00164     if( failed == 0 ) {
00165         printf( "PASSED: row-major high-level interface to dpotri\n" );
00166     } else {
00167         printf( "FAILED: row-major high-level interface to dpotri\n" );
00168     }
00169 
00170     /* Release memory */
00171     if( a != NULL ) {
00172         LAPACKE_free( a );
00173     }
00174     if( a_i != NULL ) {
00175         LAPACKE_free( a_i );
00176     }
00177     if( a_r != NULL ) {
00178         LAPACKE_free( a_r );
00179     }
00180     if( a_save != NULL ) {
00181         LAPACKE_free( a_save );
00182     }
00183 
00184     return 0;
00185 }
00186 
00187 /* Auxiliary function: dpotri scalar parameters initialization */
00188 static void init_scalars_dpotri( char *uplo, lapack_int *n, lapack_int *lda )
00189 {
00190     *uplo = 'L';
00191     *n = 4;
00192     *lda = 8;
00193 
00194     return;
00195 }
00196 
00197 /* Auxiliary functions: dpotri array parameters initialization */
00198 static void init_a( lapack_int size, double *a ) {
00199     lapack_int i;
00200     for( i = 0; i < size; i++ ) {
00201         a[i] = 0;
00202     }
00203     a[0] = 2.03960780543711410e+000;  /* a[0,0] */
00204     a[8] = 0.00000000000000000e+000;  /* a[0,1] */
00205     a[16] = 0.00000000000000000e+000;  /* a[0,2] */
00206     a[24] = 0.00000000000000000e+000;  /* a[0,3] */
00207     a[1] = -1.52970585407783540e+000;  /* a[1,0] */
00208     a[9] = 1.64012194668567270e+000;  /* a[1,1] */
00209     a[17] = 0.00000000000000000e+000;  /* a[1,2] */
00210     a[25] = 0.00000000000000000e+000;  /* a[1,3] */
00211     a[2] = 2.74562589193457660e-001;  /* a[2,0] */
00212     a[10] = -2.49981411948373810e-001;  /* a[2,1] */
00213     a[18] = 7.88748805574805310e-001;  /* a[2,2] */
00214     a[26] = 0.00000000000000000e+000;  /* a[2,3] */
00215     a[3] = -4.90290337845460110e-002;  /* a[3,0] */
00216     a[11] = 6.73730390738910060e-001;  /* a[3,1] */
00217     a[19] = 6.61657563374256520e-001;  /* a[3,2] */
00218     a[27] = 5.34689426929868430e-001;  /* a[3,3] */
00219 }
00220 
00221 /* Auxiliary function: C interface to dpotri results check */
00222 /* Return value: 0 - test is passed, non-zero - test is failed */
00223 static int compare_dpotri( double *a, double *a_i, lapack_int info,
00224                            lapack_int info_i, lapack_int lda, lapack_int n )
00225 {
00226     lapack_int i;
00227     int failed = 0;
00228     for( i = 0; i < lda*n; i++ ) {
00229         failed += compare_doubles(a[i],a_i[i]);
00230     }
00231     failed += (info == info_i) ? 0 : 1;
00232     if( info != 0 || info_i != 0 ) {
00233         printf( "info=%d, info_i=%d\n",(int)info,(int)info_i );
00234     }
00235 
00236     return failed;
00237 }


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