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

lapack_int LAPACKE_dormtr_work (int matrix_order, char side, char uplo, char trans, lapack_int m, lapack_int n, const double *a, lapack_int lda, const double *tau, double *c, lapack_int ldc, double *work, lapack_int lwork)

Function/Subroutine Documentation

lapack_int LAPACKE_dormtr_work ( int  matrix_order,
char  side,
char  uplo,
char  trans,
lapack_int  m,
lapack_int  n,
const double *  a,
lapack_int  lda,
const double *  tau,
double *  c,
lapack_int  ldc,
double *  work,
lapack_int  lwork 
)

Definition at line 36 of file lapacke_dormtr_work.c.

{
lapack_int info = 0;
lapack_int r, lda_t, ldc_t;
double *a_t = NULL, *c_t = NULL;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dormtr( &side, &uplo, &trans, &m, &n, a, &lda, tau, c, &ldc,
work, &lwork, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
r = LAPACKE_lsame( side, 'l' ) ? m : n;
lda_t = MAX(1,r);
ldc_t = MAX(1,m);
/* Check leading dimension(s) */
if( lda < r ) {
info = -8;
LAPACKE_xerbla( "LAPACKE_dormtr_work", info );
return info;
}
if( ldc < n ) {
info = -11;
LAPACKE_xerbla( "LAPACKE_dormtr_work", info );
return info;
}
/* Query optimal working array(s) size if requested */
if( lwork == -1 ) {
LAPACK_dormtr( &side, &uplo, &trans, &m, &n, a, &lda_t, tau, c,
&ldc_t, 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,r) );
if( a_t == NULL ) {
goto exit_level_0;
}
c_t = (double*)LAPACKE_malloc( sizeof(double) * ldc_t * MAX(1,n) );
if( c_t == NULL ) {
goto exit_level_1;
}
/* Transpose input matrices */
LAPACKE_dge_trans( matrix_order, r, r, a, lda, a_t, lda_t );
LAPACKE_dge_trans( matrix_order, m, n, c, ldc, c_t, ldc_t );
/* Call LAPACK function and adjust info */
LAPACK_dormtr( &side, &uplo, &trans, &m, &n, a_t, &lda_t, tau, c_t,
&ldc_t, work, &lwork, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, c_t, ldc_t, c, ldc );
/* Release memory and exit */
LAPACKE_free( c_t );
exit_level_1:
LAPACKE_free( a_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dormtr_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dormtr_work", info );
}
return info;
}

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