ssterf_2.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 * ssterf_2 is the test program for the C interface to LAPACK
00036 * routine ssterf
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_ssterf( lapack_int *n );
00055 static void init_d( lapack_int size, float *d );
00056 static void init_e( lapack_int size, float *e );
00057 static int compare_ssterf( float *d, float *d_i, float *e, float *e_i,
00058                            lapack_int info, lapack_int info_i, lapack_int n );
00059 
00060 int main(void)
00061 {
00062     /* Local scalars */
00063     lapack_int n, n_i;
00064     lapack_int info, info_i;
00065     lapack_int i;
00066     int failed;
00067 
00068     /* Local arrays */
00069     float *d = NULL, *d_i = NULL;
00070     float *e = NULL, *e_i = NULL;
00071     float *d_save = NULL;
00072     float *e_save = NULL;
00073 
00074     /* Iniitialize the scalar parameters */
00075     init_scalars_ssterf( &n );
00076     n_i = n;
00077 
00078     /* Allocate memory for the LAPACK routine arrays */
00079     d = (float *)LAPACKE_malloc( n * sizeof(float) );
00080     e = (float *)LAPACKE_malloc( (n-1) * sizeof(float) );
00081 
00082     /* Allocate memory for the C interface function arrays */
00083     d_i = (float *)LAPACKE_malloc( n * sizeof(float) );
00084     e_i = (float *)LAPACKE_malloc( (n-1) * sizeof(float) );
00085 
00086     /* Allocate memory for the backup arrays */
00087     d_save = (float *)LAPACKE_malloc( n * sizeof(float) );
00088     e_save = (float *)LAPACKE_malloc( (n-1) * sizeof(float) );
00089 
00090     /* Allocate memory for the row-major arrays */
00091 
00092     /* Initialize input arrays */
00093     init_d( n, d );
00094     init_e( (n-1), e );
00095 
00096     /* Backup the ouptut arrays */
00097     for( i = 0; i < n; i++ ) {
00098         d_save[i] = d[i];
00099     }
00100     for( i = 0; i < (n-1); i++ ) {
00101         e_save[i] = e[i];
00102     }
00103 
00104     /* Call the LAPACK routine */
00105     ssterf_( &n, d, e, &info );
00106 
00107     /* Initialize input data, call the column-major middle-level
00108      * interface to LAPACK routine and check the results */
00109     for( i = 0; i < n; i++ ) {
00110         d_i[i] = d_save[i];
00111     }
00112     for( i = 0; i < (n-1); i++ ) {
00113         e_i[i] = e_save[i];
00114     }
00115     info_i = LAPACKE_ssterf_work( n_i, d_i, e_i );
00116 
00117     failed = compare_ssterf( d, d_i, e, e_i, info, info_i, n );
00118     if( failed == 0 ) {
00119         printf( "PASSED: column-major middle-level interface to ssterf\n" );
00120     } else {
00121         printf( "FAILED: column-major middle-level interface to ssterf\n" );
00122     }
00123 
00124     /* Initialize input data, call the column-major high-level
00125      * interface to LAPACK routine and check the results */
00126     for( i = 0; i < n; i++ ) {
00127         d_i[i] = d_save[i];
00128     }
00129     for( i = 0; i < (n-1); i++ ) {
00130         e_i[i] = e_save[i];
00131     }
00132     info_i = LAPACKE_ssterf( n_i, d_i, e_i );
00133 
00134     failed = compare_ssterf( d, d_i, e, e_i, info, info_i, n );
00135     if( failed == 0 ) {
00136         printf( "PASSED: column-major high-level interface to ssterf\n" );
00137     } else {
00138         printf( "FAILED: column-major high-level interface to ssterf\n" );
00139     }
00140 
00141     failed = compare_ssterf( d, d_i, e, e_i, info, info_i, n );
00142     if( failed == 0 ) {
00143         printf( "PASSED: row-major middle-level interface to ssterf\n" );
00144     } else {
00145         printf( "FAILED: row-major middle-level interface to ssterf\n" );
00146     }
00147 
00148     failed = compare_ssterf( d, d_i, e, e_i, info, info_i, n );
00149     if( failed == 0 ) {
00150         printf( "PASSED: row-major high-level interface to ssterf\n" );
00151     } else {
00152         printf( "FAILED: row-major high-level interface to ssterf\n" );
00153     }
00154 
00155     /* Release memory */
00156     if( d != NULL ) {
00157         LAPACKE_free( d );
00158     }
00159     if( d_i != NULL ) {
00160         LAPACKE_free( d_i );
00161     }
00162     if( d_save != NULL ) {
00163         LAPACKE_free( d_save );
00164     }
00165     if( e != NULL ) {
00166         LAPACKE_free( e );
00167     }
00168     if( e_i != NULL ) {
00169         LAPACKE_free( e_i );
00170     }
00171     if( e_save != NULL ) {
00172         LAPACKE_free( e_save );
00173     }
00174 
00175     return 0;
00176 }
00177 
00178 /* Auxiliary function: ssterf scalar parameters initialization */
00179 static void init_scalars_ssterf( lapack_int *n )
00180 {
00181     *n = 4;
00182 
00183     return;
00184 }
00185 
00186 /* Auxiliary functions: ssterf array parameters initialization */
00187 static void init_d( lapack_int size, float *d ) {
00188     lapack_int i;
00189     for( i = 0; i < size; i++ ) {
00190         d[i] = 0;
00191     }
00192     d[0] = -2.278637648e+000;
00193     d[1] = -1.334985495e-001;
00194     d[2] = -1.463528872e-001;
00195     d[3] = -1.930385590e+000;
00196 }
00197 static void init_e( lapack_int size, float *e ) {
00198     lapack_int i;
00199     for( i = 0; i < size; i++ ) {
00200         e[i] = 0;
00201     }
00202     e[0] = -4.337746620e+000;
00203     e[1] = -2.022518158e+000;
00204     e[2] = -1.792322278e+000;
00205 }
00206 
00207 /* Auxiliary function: C interface to ssterf results check */
00208 /* Return value: 0 - test is passed, non-zero - test is failed */
00209 static int compare_ssterf( float *d, float *d_i, float *e, float *e_i,
00210                            lapack_int info, lapack_int info_i, lapack_int n )
00211 {
00212     lapack_int i;
00213     int failed = 0;
00214     for( i = 0; i < n; i++ ) {
00215         failed += compare_floats(d[i],d_i[i]);
00216     }
00217     for( i = 0; i < (n-1); i++ ) {
00218         failed += compare_floats(e[i],e_i[i]);
00219     }
00220     failed += (info == info_i) ? 0 : 1;
00221     if( info != 0 || info_i != 0 ) {
00222         printf( "info=%d, info_i=%d\n",(int)info,(int)info_i );
00223     }
00224 
00225     return failed;
00226 }


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