lapacke_stftri_work.c

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* Contents: Native middle-level C interface to LAPACK function stftri
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_stftri_work( int matrix_layout, char transr, char uplo,
                                char diag, lapack_int n, float* a )
{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_stftri( &transr, &uplo, &diag, &n, a, &info );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        float* a_t = NULL;
        /* Allocate memory for temporary array(s) */
        a_t = (float*)
            LAPACKE_malloc( sizeof(float) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
        if( a_t == NULL ) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_0;
        }
        /* Transpose input matrices */
        LAPACKE_stf_trans( matrix_layout, transr, uplo, diag, n, a, a_t );
        /* Call LAPACK function and adjust info */
        LAPACK_stftri( &transr, &uplo, &diag, &n, a_t, &info );
        if( info < 0 ) {
            info = info - 1;
        }
        /* Transpose output matrices */
        LAPACKE_stf_trans( LAPACK_COL_MAJOR, transr, uplo, diag, n, a_t, a );
        /* Release memory and exit */
        LAPACKE_free( a_t );
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_stftri_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_stftri_work", info );
    }
    return info;
}