spbtrf_1.c
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00001 /*****************************************************************************
00002   Copyright (c) 2010, Intel Corp.
00003   All rights reserved.
00004 
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00016 
00017   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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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 * spbtrf_1 is the test program for the C interface to LAPACK
00036 * routine spbtrf
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_spbtrf( char *uplo, lapack_int *n, lapack_int *kd,
00055                                  lapack_int *ldab );
00056 static void init_ab( lapack_int size, float *ab );
00057 static int compare_spbtrf( float *ab, float *ab_i, lapack_int info,
00058                            lapack_int info_i, lapack_int ldab, lapack_int n );
00059 
00060 int main(void)
00061 {
00062     /* Local scalars */
00063     char uplo, uplo_i;
00064     lapack_int n, n_i;
00065     lapack_int kd, kd_i;
00066     lapack_int ldab, ldab_i;
00067     lapack_int ldab_r;
00068     lapack_int info, info_i;
00069     lapack_int i;
00070     int failed;
00071 
00072     /* Local arrays */
00073     float *ab = NULL, *ab_i = NULL;
00074     float *ab_save = NULL;
00075     float *ab_r = NULL;
00076 
00077     /* Iniitialize the scalar parameters */
00078     init_scalars_spbtrf( &uplo, &n, &kd, &ldab );
00079     ldab_r = n+2;
00080     uplo_i = uplo;
00081     n_i = n;
00082     kd_i = kd;
00083     ldab_i = ldab;
00084 
00085     /* Allocate memory for the LAPACK routine arrays */
00086     ab = (float *)LAPACKE_malloc( ldab*n * sizeof(float) );
00087 
00088     /* Allocate memory for the C interface function arrays */
00089     ab_i = (float *)LAPACKE_malloc( ldab*n * sizeof(float) );
00090 
00091     /* Allocate memory for the backup arrays */
00092     ab_save = (float *)LAPACKE_malloc( ldab*n * sizeof(float) );
00093 
00094     /* Allocate memory for the row-major arrays */
00095     ab_r = (float *)LAPACKE_malloc( (kd+1)*(n+2) * sizeof(float) );
00096 
00097     /* Initialize input arrays */
00098     init_ab( ldab*n, ab );
00099 
00100     /* Backup the ouptut arrays */
00101     for( i = 0; i < ldab*n; i++ ) {
00102         ab_save[i] = ab[i];
00103     }
00104 
00105     /* Call the LAPACK routine */
00106     spbtrf_( &uplo, &n, &kd, ab, &ldab, &info );
00107 
00108     /* Initialize input data, call the column-major middle-level
00109      * interface to LAPACK routine and check the results */
00110     for( i = 0; i < ldab*n; i++ ) {
00111         ab_i[i] = ab_save[i];
00112     }
00113     info_i = LAPACKE_spbtrf_work( LAPACK_COL_MAJOR, uplo_i, n_i, kd_i, ab_i,
00114                                   ldab_i );
00115 
00116     failed = compare_spbtrf( ab, ab_i, info, info_i, ldab, n );
00117     if( failed == 0 ) {
00118         printf( "PASSED: column-major middle-level interface to spbtrf\n" );
00119     } else {
00120         printf( "FAILED: column-major middle-level interface to spbtrf\n" );
00121     }
00122 
00123     /* Initialize input data, call the column-major high-level
00124      * interface to LAPACK routine and check the results */
00125     for( i = 0; i < ldab*n; i++ ) {
00126         ab_i[i] = ab_save[i];
00127     }
00128     info_i = LAPACKE_spbtrf( LAPACK_COL_MAJOR, uplo_i, n_i, kd_i, ab_i,
00129                              ldab_i );
00130 
00131     failed = compare_spbtrf( ab, ab_i, info, info_i, ldab, n );
00132     if( failed == 0 ) {
00133         printf( "PASSED: column-major high-level interface to spbtrf\n" );
00134     } else {
00135         printf( "FAILED: column-major high-level interface to spbtrf\n" );
00136     }
00137 
00138     /* Initialize input data, call the row-major middle-level
00139      * interface to LAPACK routine and check the results */
00140     for( i = 0; i < ldab*n; i++ ) {
00141         ab_i[i] = ab_save[i];
00142     }
00143 
00144     LAPACKE_sge_trans( LAPACK_COL_MAJOR, kd+1, n, ab_i, ldab, ab_r, n+2 );
00145     info_i = LAPACKE_spbtrf_work( LAPACK_ROW_MAJOR, uplo_i, n_i, kd_i, ab_r,
00146                                   ldab_r );
00147 
00148     LAPACKE_sge_trans( LAPACK_ROW_MAJOR, kd+1, n, ab_r, n+2, ab_i, ldab );
00149 
00150     failed = compare_spbtrf( ab, ab_i, info, info_i, ldab, n );
00151     if( failed == 0 ) {
00152         printf( "PASSED: row-major middle-level interface to spbtrf\n" );
00153     } else {
00154         printf( "FAILED: row-major middle-level interface to spbtrf\n" );
00155     }
00156 
00157     /* Initialize input data, call the row-major high-level
00158      * interface to LAPACK routine and check the results */
00159     for( i = 0; i < ldab*n; i++ ) {
00160         ab_i[i] = ab_save[i];
00161     }
00162 
00163     /* Init row_major arrays */
00164     LAPACKE_sge_trans( LAPACK_COL_MAJOR, kd+1, n, ab_i, ldab, ab_r, n+2 );
00165     info_i = LAPACKE_spbtrf( LAPACK_ROW_MAJOR, uplo_i, n_i, kd_i, ab_r,
00166                              ldab_r );
00167 
00168     LAPACKE_sge_trans( LAPACK_ROW_MAJOR, kd+1, n, ab_r, n+2, ab_i, ldab );
00169 
00170     failed = compare_spbtrf( ab, ab_i, info, info_i, ldab, n );
00171     if( failed == 0 ) {
00172         printf( "PASSED: row-major high-level interface to spbtrf\n" );
00173     } else {
00174         printf( "FAILED: row-major high-level interface to spbtrf\n" );
00175     }
00176 
00177     /* Release memory */
00178     if( ab != NULL ) {
00179         LAPACKE_free( ab );
00180     }
00181     if( ab_i != NULL ) {
00182         LAPACKE_free( ab_i );
00183     }
00184     if( ab_r != NULL ) {
00185         LAPACKE_free( ab_r );
00186     }
00187     if( ab_save != NULL ) {
00188         LAPACKE_free( ab_save );
00189     }
00190 
00191     return 0;
00192 }
00193 
00194 /* Auxiliary function: spbtrf scalar parameters initialization */
00195 static void init_scalars_spbtrf( char *uplo, lapack_int *n, lapack_int *kd,
00196                                  lapack_int *ldab )
00197 {
00198     *uplo = 'L';
00199     *n = 4;
00200     *kd = 1;
00201     *ldab = 9;
00202 
00203     return;
00204 }
00205 
00206 /* Auxiliary functions: spbtrf array parameters initialization */
00207 static void init_ab( lapack_int size, float *ab ) {
00208     lapack_int i;
00209     for( i = 0; i < size; i++ ) {
00210         ab[i] = 0;
00211     }
00212     ab[0] = 5.489999771e+000;  /* ab[0,0] */
00213     ab[9] = 5.630000114e+000;  /* ab[0,1] */
00214     ab[18] = 2.599999905e+000;  /* ab[0,2] */
00215     ab[27] = 5.170000076e+000;  /* ab[0,3] */
00216     ab[1] = 2.680000067e+000;  /* ab[1,0] */
00217     ab[10] = -2.390000105e+000;  /* ab[1,1] */
00218     ab[19] = -2.220000029e+000;  /* ab[1,2] */
00219     ab[28] = 0.000000000e+000;  /* ab[1,3] */
00220 }
00221 
00222 /* Auxiliary function: C interface to spbtrf results check */
00223 /* Return value: 0 - test is passed, non-zero - test is failed */
00224 static int compare_spbtrf( float *ab, float *ab_i, lapack_int info,
00225                            lapack_int info_i, lapack_int ldab, lapack_int n )
00226 {
00227     lapack_int i;
00228     int failed = 0;
00229     for( i = 0; i < ldab*n; i++ ) {
00230         failed += compare_floats(ab[i],ab_i[i]);
00231     }
00232     failed += (info == info_i) ? 0 : 1;
00233     if( info != 0 || info_i != 0 ) {
00234         printf( "info=%d, info_i=%d\n",(int)info,(int)info_i );
00235     }
00236 
00237     return failed;
00238 }


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