LAPACK  3.5.0
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lapacke_dsytrd_work.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_dsytrd_work (int matrix_order, char uplo, lapack_int n, double *a, lapack_int lda, double *d, double *e, double *tau, double *work, lapack_int lwork)

Function/Subroutine Documentation

lapack_int LAPACKE_dsytrd_work ( int  matrix_order,
char  uplo,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  d,
double *  e,
double *  tau,
double *  work,
lapack_int  lwork 
)

Definition at line 36 of file lapacke_dsytrd_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dsytrd( &uplo, &n, a, &lda, d, e, tau, work, &lwork, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int lda_t = MAX(1,n);
double* a_t = NULL;
/* Check leading dimension(s) */
if( lda < n ) {
info = -5;
LAPACKE_xerbla( "LAPACKE_dsytrd_work", info );
return info;
}
/* Query optimal working array(s) size if requested */
if( lwork == -1 ) {
LAPACK_dsytrd( &uplo, &n, a, &lda_t, d, e, tau, work, &lwork,
&info );
return (info < 0) ? (info - 1) : info;
}
/* Allocate memory for temporary array(s) */
a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
if( a_t == NULL ) {
goto exit_level_0;
}
/* Transpose input matrices */
LAPACKE_dsy_trans( matrix_order, uplo, n, a, lda, a_t, lda_t );
/* Call LAPACK function and adjust info */
LAPACK_dsytrd( &uplo, &n, a_t, &lda_t, d, e, tau, work, &lwork, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_dsy_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
/* Release memory and exit */
LAPACKE_free( a_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dsytrd_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dsytrd_work", info );
}
return info;
}

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