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lapacke_ztrexc_work.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_ztrexc_work (int matrix_order, char compq, lapack_int n, lapack_complex_double *t, lapack_int ldt, lapack_complex_double *q, lapack_int ldq, lapack_int ifst, lapack_int ilst)

Function/Subroutine Documentation

lapack_int LAPACKE_ztrexc_work ( int  matrix_order,
char  compq,
lapack_int  n,
lapack_complex_double t,
lapack_int  ldt,
lapack_complex_double q,
lapack_int  ldq,
lapack_int  ifst,
lapack_int  ilst 
)

Definition at line 36 of file lapacke_ztrexc_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_ztrexc( &compq, &n, t, &ldt, q, &ldq, &ifst, &ilst, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ldq_t = MAX(1,n);
lapack_int ldt_t = MAX(1,n);
lapack_complex_double* t_t = NULL;
lapack_complex_double* q_t = NULL;
/* Check leading dimension(s) */
if( ldq < n ) {
info = -7;
LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
return info;
}
if( ldt < n ) {
info = -5;
LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
LAPACKE_malloc( sizeof(lapack_complex_double) * ldt_t * MAX(1,n) );
if( t_t == NULL ) {
goto exit_level_0;
}
if( LAPACKE_lsame( compq, 'v' ) ) {
ldq_t * MAX(1,n) );
if( q_t == NULL ) {
goto exit_level_1;
}
}
/* Transpose input matrices */
LAPACKE_zge_trans( matrix_order, n, n, t, ldt, t_t, ldt_t );
if( LAPACKE_lsame( compq, 'v' ) ) {
LAPACKE_zge_trans( matrix_order, n, n, q, ldq, q_t, ldq_t );
}
/* Call LAPACK function and adjust info */
LAPACK_ztrexc( &compq, &n, t_t, &ldt_t, q_t, &ldq_t, &ifst, &ilst,
&info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, t_t, ldt_t, t, ldt );
if( LAPACKE_lsame( compq, 'v' ) ) {
LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
}
/* Release memory and exit */
if( LAPACKE_lsame( compq, 'v' ) ) {
LAPACKE_free( q_t );
}
exit_level_1:
LAPACKE_free( t_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
}
return info;
}

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