lapack_int LAPACKE_dsygst( int matrix_layout, lapack_int itype, char uplo,
lapack_int n, double* a, lapack_int lda,
const double* b, lapack_int ldb )
{
if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_dsygst", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_dsy_nancheck( matrix_layout, uplo, n, a, lda ) ) {
return -5;
}
if( LAPACKE_dge_nancheck( matrix_layout, n, n, b, ldb ) ) {
return -7;
}
#endif
return LAPACKE_dsygst_work( matrix_layout, itype, uplo, n, a, lda, b, ldb );
}
int main(void)
{
/* Local scalars */
lapack_int itype, itype_i;
char uplo, uplo_i;
lapack_int n, n_i;
lapack_int lda, lda_i;
lapack_int lda_r;
lapack_int ldb, ldb_i;
lapack_int ldb_r;
lapack_int info, info_i;
lapack_int i;
int failed;
/* Local arrays */
double *a = NULL, *a_i = NULL;
double *b = NULL, *b_i = NULL;
double *a_save = NULL;
double *a_r = NULL;
double *b_r = NULL;
/* Iniitialize the scalar parameters */
init_scalars_dsygst( &itype, &uplo, &n, &lda, &ldb );
lda_r = n+2;
ldb_r = n+2;
itype_i = itype;
uplo_i = uplo;
n_i = n;
lda_i = lda;
ldb_i = ldb;
/* Allocate memory for the LAPACK routine arrays */
a = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
b = (double *)LAPACKE_malloc( ldb*n * sizeof(double) );
/* Allocate memory for the C interface function arrays */
a_i = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
b_i = (double *)LAPACKE_malloc( ldb*n * sizeof(double) );
/* Allocate memory for the backup arrays */
a_save = (double *)LAPACKE_malloc( lda*n * sizeof(double) );
/* Allocate memory for the row-major arrays */
a_r = (double *)LAPACKE_malloc( n*(n+2) * sizeof(double) );
b_r = (double *)LAPACKE_malloc( n*(n+2) * sizeof(double) );
/* Initialize input arrays */
init_a( lda*n, a );
init_b( ldb*n, b );
/* Backup the ouptut arrays */
for( i = 0; i < lda*n; i++ ) {
a_save[i] = a[i];
}
/* Call the LAPACK routine */
dsygst_( &itype, &uplo, &n, a, &lda, b, &ldb, &info );
/* Initialize input data, call the column-major middle-level
* interface to LAPACK routine and check the results */
for( i = 0; i < lda*n; i++ ) {
a_i[i] = a_save[i];
}
for( i = 0; i < ldb*n; i++ ) {
b_i[i] = b[i];
}
info_i = LAPACKE_dsygst_work( LAPACK_COL_MAJOR, itype_i, uplo_i, n_i, a_i,
lda_i, b_i, ldb_i );
failed = compare_dsygst( a, a_i, info, info_i, lda, n );
if( failed == 0 ) {
printf( "PASSED: column-major middle-level interface to dsygst\n" );
} else {
printf( "FAILED: column-major middle-level interface to dsygst\n" );
}
/* Initialize input data, call the column-major high-level
* interface to LAPACK routine and check the results */
for( i = 0; i < lda*n; i++ ) {
a_i[i] = a_save[i];
}
for( i = 0; i < ldb*n; i++ ) {
b_i[i] = b[i];
}
info_i = LAPACKE_dsygst( LAPACK_COL_MAJOR, itype_i, uplo_i, n_i, a_i, lda_i,
b_i, ldb_i );
failed = compare_dsygst( a, a_i, info, info_i, lda, n );
if( failed == 0 ) {
printf( "PASSED: column-major high-level interface to dsygst\n" );
} else {
printf( "FAILED: column-major high-level interface to dsygst\n" );
}
/* Initialize input data, call the row-major middle-level
* interface to LAPACK routine and check the results */
for( i = 0; i < lda*n; i++ ) {
a_i[i] = a_save[i];
}
for( i = 0; i < ldb*n; i++ ) {
b_i[i] = b[i];
}
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_i, ldb, b_r, n+2 );
info_i = LAPACKE_dsygst_work( LAPACK_ROW_MAJOR, itype_i, uplo_i, n_i, a_r,
lda_r, b_r, ldb_r );
LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, a_r, n+2, a_i, lda );
failed = compare_dsygst( a, a_i, info, info_i, lda, n );
if( failed == 0 ) {
printf( "PASSED: row-major middle-level interface to dsygst\n" );
} else {
printf( "FAILED: row-major middle-level interface to dsygst\n" );
}
/* Initialize input data, call the row-major high-level
* interface to LAPACK routine and check the results */
for( i = 0; i < lda*n; i++ ) {
a_i[i] = a_save[i];
}
for( i = 0; i < ldb*n; i++ ) {
b_i[i] = b[i];
}
/* Init row_major arrays */
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_i, lda, a_r, n+2 );
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_i, ldb, b_r, n+2 );
info_i = LAPACKE_dsygst( LAPACK_ROW_MAJOR, itype_i, uplo_i, n_i, a_r, lda_r,
b_r, ldb_r );
LAPACKE_dge_trans( LAPACK_ROW_MAJOR, n, n, a_r, n+2, a_i, lda );
failed = compare_dsygst( a, a_i, info, info_i, lda, n );
if( failed == 0 ) {
printf( "PASSED: row-major high-level interface to dsygst\n" );
} else {
printf( "FAILED: row-major high-level interface to dsygst\n" );
}
/* Release memory */
if( a != NULL ) {
LAPACKE_free( a );
}
if( a_i != NULL ) {
LAPACKE_free( a_i );
}
if( a_r != NULL ) {
LAPACKE_free( a_r );
}
if( a_save != NULL ) {
LAPACKE_free( a_save );
}
if( b != NULL ) {
LAPACKE_free( b );
}
if( b_i != NULL ) {
LAPACKE_free( b_i );
}
if( b_r != NULL ) {
LAPACKE_free( b_r );
}
return 0;
}
