LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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lapacke_ctbtrs_work.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_ctbtrs_work (int matrix_order, char uplo, char trans, char diag, lapack_int n, lapack_int kd, lapack_int nrhs, const lapack_complex_float *ab, lapack_int ldab, lapack_complex_float *b, lapack_int ldb)

Function/Subroutine Documentation

lapack_int LAPACKE_ctbtrs_work ( int  matrix_order,
char  uplo,
char  trans,
char  diag,
lapack_int  n,
lapack_int  kd,
lapack_int  nrhs,
const lapack_complex_float ab,
lapack_int  ldab,
lapack_complex_float b,
lapack_int  ldb 
)

Definition at line 36 of file lapacke_ctbtrs_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_ctbtrs( &uplo, &trans, &diag, &n, &kd, &nrhs, ab, &ldab, b, &ldb,
&info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ldab_t = MAX(1,kd+1);
lapack_int ldb_t = MAX(1,n);
lapack_complex_float* ab_t = NULL;
lapack_complex_float* b_t = NULL;
/* Check leading dimension(s) */
if( ldab < n ) {
info = -9;
LAPACKE_xerbla( "LAPACKE_ctbtrs_work", info );
return info;
}
if( ldb < nrhs ) {
info = -11;
LAPACKE_xerbla( "LAPACKE_ctbtrs_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
LAPACKE_malloc( sizeof(lapack_complex_float) * ldab_t * MAX(1,n) );
if( ab_t == NULL ) {
goto exit_level_0;
}
ldb_t * MAX(1,nrhs) );
if( b_t == NULL ) {
goto exit_level_1;
}
/* Transpose input matrices */
LAPACKE_ctb_trans( matrix_order, uplo, diag, n, kd, ab, ldab, ab_t,
ldab_t );
LAPACKE_cge_trans( matrix_order, n, nrhs, b, ldb, b_t, ldb_t );
/* Call LAPACK function and adjust info */
LAPACK_ctbtrs( &uplo, &trans, &diag, &n, &kd, &nrhs, ab_t, &ldab_t, b_t,
&ldb_t, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
/* Release memory and exit */
LAPACKE_free( b_t );
exit_level_1:
LAPACKE_free( ab_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_ctbtrs_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_ctbtrs_work", info );
}
return info;
}

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