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

lapack_int LAPACKE_dsbgst_work (int matrix_order, char vect, char uplo, lapack_int n, lapack_int ka, lapack_int kb, double *ab, lapack_int ldab, const double *bb, lapack_int ldbb, double *x, lapack_int ldx, double *work)

Function/Subroutine Documentation

lapack_int LAPACKE_dsbgst_work ( int  matrix_order,
char  vect,
char  uplo,
lapack_int  n,
lapack_int  ka,
lapack_int  kb,
double *  ab,
lapack_int  ldab,
const double *  bb,
lapack_int  ldbb,
double *  x,
lapack_int  ldx,
double *  work 
)

Definition at line 36 of file lapacke_dsbgst_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dsbgst( &vect, &uplo, &n, &ka, &kb, ab, &ldab, bb, &ldbb, x,
&ldx, work, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ldab_t = MAX(1,ka+1);
lapack_int ldbb_t = MAX(1,kb+1);
lapack_int ldx_t = MAX(1,n);
double* ab_t = NULL;
double* bb_t = NULL;
double* x_t = NULL;
/* Check leading dimension(s) */
if( ldab < n ) {
info = -8;
LAPACKE_xerbla( "LAPACKE_dsbgst_work", info );
return info;
}
if( ldbb < n ) {
info = -10;
LAPACKE_xerbla( "LAPACKE_dsbgst_work", info );
return info;
}
if( ldx < n ) {
info = -12;
LAPACKE_xerbla( "LAPACKE_dsbgst_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
if( ab_t == NULL ) {
goto exit_level_0;
}
bb_t = (double*)LAPACKE_malloc( sizeof(double) * ldbb_t * MAX(1,n) );
if( bb_t == NULL ) {
goto exit_level_1;
}
if( LAPACKE_lsame( vect, 'v' ) ) {
x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,n) );
if( x_t == NULL ) {
goto exit_level_2;
}
}
/* Transpose input matrices */
LAPACKE_dsb_trans( matrix_order, uplo, n, ka, ab, ldab, ab_t, ldab_t );
LAPACKE_dsb_trans( matrix_order, uplo, n, kb, bb, ldbb, bb_t, ldbb_t );
/* Call LAPACK function and adjust info */
LAPACK_dsbgst( &vect, &uplo, &n, &ka, &kb, ab_t, &ldab_t, bb_t, &ldbb_t,
x_t, &ldx_t, work, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_dsb_trans( LAPACK_COL_MAJOR, uplo, n, ka, ab_t, ldab_t, ab,
ldab );
if( LAPACKE_lsame( vect, 'v' ) ) {
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, x_t, ldx_t, x, ldx );
}
/* Release memory and exit */
if( LAPACKE_lsame( vect, 'v' ) ) {
LAPACKE_free( x_t );
}
exit_level_2:
LAPACKE_free( bb_t );
exit_level_1:
LAPACKE_free( ab_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dsbgst_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dsbgst_work", info );
}
return info;
}

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