lapacke_cgbsvx_work.c

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* Contents: Native middle-level C interface to LAPACK function cgbsvx
* Author: Intel Corporation
*****************************************************************************/

#include"lapacke_utils.h"

lapack_intLAPACKE_cgbsvx_work( intmatrix_layout, charfact, chartrans,
lapack_intn, lapack_intkl, lapack_intku,
lapack_intnrhs, lapack_complex_float*ab,
lapack_intldab, lapack_complex_float*afb,
lapack_intldafb, lapack_int*ipiv, char*equed,
float*r, float*c, lapack_complex_float*b,
lapack_intldb, lapack_complex_float*x,
lapack_intldx, float*rcond, float*ferr,
float*berr, lapack_complex_float*work,
float*rwork )
{
lapack_intinfo=0;
if( matrix_layout==LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_cgbsvx( &fact, &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb,
&ldafb, ipiv, equed, r, c, b, &ldb, x, &ldx, rcond, ferr,
berr, work, rwork, &info );
if( info<0 ) {
info=info-1;
 }
 } elseif( matrix_layout==LAPACK_ROW_MAJOR ) {
lapack_intldab_t=MAX(1,kl+ku+1);
lapack_intldafb_t=MAX(1,2*kl+ku+1);
lapack_intldb_t=MAX(1,n);
lapack_intldx_t=MAX(1,n);
lapack_complex_float*ab_t=NULL;
lapack_complex_float*afb_t=NULL;
lapack_complex_float*b_t=NULL;
lapack_complex_float*x_t=NULL;
/* Check leading dimension(s) */
if( ldab<n ) {
info=-9;
LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
returninfo;
 }
if( ldafb<n ) {
info=-11;
LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
returninfo;
 }
if( ldb<nrhs ) {
info=-17;
LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
returninfo;
 }
if( ldx<nrhs ) {
info=-19;
LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
returninfo;
 }
/* Allocate memory for temporary array(s) */
ab_t= (lapack_complex_float*)
LAPACKE_malloc( sizeof(lapack_complex_float) *ldab_t*MAX(1,n) );
if( ab_t==NULL ) {
info=LAPACK_TRANSPOSE_MEMORY_ERROR;
 goto exit_level_0;
 }
afb_t= (lapack_complex_float*)
LAPACKE_malloc( sizeof(lapack_complex_float) *ldafb_t*MAX(1,n) );
if( afb_t==NULL ) {
info=LAPACK_TRANSPOSE_MEMORY_ERROR;
 goto exit_level_1;
 }
b_t= (lapack_complex_float*)
LAPACKE_malloc( sizeof(lapack_complex_float) *
ldb_t*MAX(1,nrhs) );
if( b_t==NULL ) {
info=LAPACK_TRANSPOSE_MEMORY_ERROR;
 goto exit_level_2;
 }
x_t= (lapack_complex_float*)
LAPACKE_malloc( sizeof(lapack_complex_float) *
ldx_t*MAX(1,nrhs) );
if( x_t==NULL ) {
info=LAPACK_TRANSPOSE_MEMORY_ERROR;
 goto exit_level_3;
 }
/* Transpose input matrices */
LAPACKE_cgb_trans( matrix_layout, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
if( LAPACKE_lsame( fact, 'f' ) ) {
LAPACKE_cgb_trans( matrix_layout, n, n, kl, kl+ku, afb, ldafb, afb_t,
ldafb_t );
 }
LAPACKE_cge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
/* Call LAPACK function and adjust info */
LAPACK_cgbsvx( &fact, &trans, &n, &kl, &ku, &nrhs, ab_t, &ldab_t, afb_t,
&ldafb_t, ipiv, equed, r, c, b_t, &ldb_t, x_t, &ldx_t,
rcond, ferr, berr, work, rwork, &info );
if( info<0 ) {
info=info-1;
 }
/* Transpose output matrices */
if( LAPACKE_lsame( fact, 'e' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
LAPACKE_lsame( *equed, 'c' ) ||LAPACKE_lsame( *equed, 'r' ) ) ) {
LAPACKE_cgb_trans( LAPACK_COL_MAJOR, n, n, kl, ku, ab_t, ldab_t, ab,
ldab );
 }
if( LAPACKE_lsame( fact, 'e' ) ||LAPACKE_lsame( fact, 'n' ) ) {
LAPACKE_cgb_trans( LAPACK_COL_MAJOR, n, n, kl, kl+ku, afb_t,
ldafb_t, afb, ldafb );
 }
if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
LAPACKE_lsame( *equed, 'c' ) ||LAPACKE_lsame( *equed, 'r' ) ) ) {
LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
 }
LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
/* Release memory and exit */
LAPACKE_free( x_t );
exit_level_3:
LAPACKE_free( b_t );
exit_level_2:
LAPACKE_free( afb_t );
exit_level_1:
LAPACKE_free( ab_t );
exit_level_0:
if( info==LAPACK_TRANSPOSE_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
 }
 } else {
info=-1;
LAPACKE_xerbla( "LAPACKE_cgbsvx_work", info );
 }
returninfo;
}