lapacke_stprfb.c

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* Contents: Native high-level C interface to LAPACK function stprfb
* Author: Intel Corporation
* Generated June 2016
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_stprfb( int matrix_layout, char side, char trans, char direct,
                           char storev, lapack_int m, lapack_int n,
                           lapack_int k, lapack_int l, const float* v,
                           lapack_int ldv, const float* t, lapack_int ldt,
                           float* a, lapack_int lda, float* b, lapack_int ldb)
{
    lapack_int ncols_v, nrows_v;
    lapack_int info = 0;
    lapack_int ldwork;
    lapack_int work_size;
    float* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_stprfb", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_lsame( storev, 'C' ) ) {
        ncols_v = k;
        nrows_v = LAPACKE_lsame( side, 'L' ) ? m :
                             ( LAPACKE_lsame( side, 'R' ) ? n : 0 );
    } else if( LAPACKE_lsame( storev, 'R' ) ) {
        ncols_v = LAPACKE_lsame( side, 'L' ) ? m :
                             ( LAPACKE_lsame( side, 'R' ) ? n : 0 );
        nrows_v = k;
    } else {
        ncols_v = 0;
        nrows_v = 0;
    }
    if( LAPACKE_sge_nancheck( matrix_layout, k, m, a, lda ) ) {
        return -14;
    }
    if( LAPACKE_sge_nancheck( matrix_layout, m, n, b, ldb ) ) {
        return -16;
    }
    if( LAPACKE_sge_nancheck( matrix_layout, k, k, t, ldt ) ) {
        return -12;
    }
    if( LAPACKE_sge_nancheck( matrix_layout, nrows_v, ncols_v, v, ldv ) ) {
        return -10;
    }
#endif
    if (side=='l' ||  side=='L') {
       ldwork = k;
       work_size = MAX(1,ldwork) * MAX(1,n);
       }
    else {
       ldwork = m;
       work_size = MAX(1,ldwork) * MAX(1,k);
       }    
        /* Allocate memory for working array(s) */
    work = (float*)
        LAPACKE_malloc( sizeof(float) * work_size );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_stprfb_work( matrix_layout, side, trans, direct, storev, m, n,
                                k, l, v, ldv, t, ldt, a, lda, b, ldb, work,
                                ldwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_stprfb", info );
    }
    return info;
}