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#include <flens/lapack/interface/include/config.h>
namespace flens { namespace lapack {
template <typename T>
struct SelectFunction
{
typedef LOGICAL (* Function)(const T *, const T *);
SelectFunction(Function _select)
: select(_select)
{
}
LOGICAL
operator()(const T &a, const T &b)
{
return select(&a, &b);
}
Function select;
};
template <typename T>
struct SelectFunction<std::complex<T> >
{
typedef std::complex<T> CT;
typedef LOGICAL (* LapackFunction)(const T *);
typedef LOGICAL (* Function)(const CT *);
SelectFunction(LapackFunction _select)
: select(reinterpret_cast<Function>(_select))
{
}
LOGICAL
operator()(const CT &a)
{
return select(reinterpret_cast<const T *>(&a));
}
Function select;
};
extern "C" {
//-- dgeesx --------------------------------------------------------------------
void
LAPACK_DECL(dgeesx)(const char *JOBVS,
const char *SORT,
LOGICAL (*SELECT)(const DOUBLE *, const DOUBLE *),
const char *SENSE,
const INTEGER *N,
DOUBLE *A,
const INTEGER *LDA,
INTEGER *SDIM,
DOUBLE *WR,
DOUBLE *WI,
DOUBLE *VS,
const INTEGER *LDVS,
DOUBLE *RCONDE,
DOUBLE *RCONDV,
DOUBLE *WORK,
const INTEGER *LWORK,
INTEGER *IWORK,
const INTEGER *LIWORK,
LOGICAL *BWORK,
INTEGER *INFO)
{
std::cerr << "dgeesx: N = " << *N << std::endl;
using std::max;
using std::min;
//
// Test the input parameters so that we pass LAPACK error checks
//
*INFO = 0;
const bool lQuery = (*LWORK==-1) || (*LIWORK==-1);
const bool wantVS = (*JOBVS=='V');
const bool wantST = (*SORT=='S');
const bool wantSN = (*SENSE=='N');
const bool wantSE = (*SENSE=='E');
const bool wantSV = (*SENSE=='V');
const bool wantSB = (*SENSE=='B');
if ((!wantVS) && (*JOBVS!='N')) {
*INFO = 1;
} else if ((!wantST) && (*SORT!='N')) {
*INFO = 2;
} else if (!(wantSN || wantSE || wantSV || wantSB)
|| ( !wantST && !wantSN))
{
*INFO = 4;
} else if (*N<0) {
*INFO = 5;
} else if (*LDA<max(INTEGER(1),*N)) {
*INFO = 7;
} else if (*LDVS<1 || (wantVS && *LDVS<*N)) {
*INFO = 12;
}
if (*INFO!=0) {
LAPACK_ERROR("DGEESX", INFO);
*INFO = -(*INFO);
return;
}
//
// Setup FLENS matrix/vector types
//
typedef DGeMatrixView::IndexType IndexType;
SENSE::Sense sense = SENSE::Sense(*SENSE);
DGeMatrixView _A = DFSView(*N, *N, A, *LDA);
IndexType _SDIM = *SDIM;
DDenseVectorView _WR = DArrayView(*N, WR, 1);
DDenseVectorView _WI = DArrayView(*N, WI, 1);
DGeMatrixView _VS = DFSView(*N, *N, VS, *LDVS);
DDenseVectorView _WORK = DArrayView(*LWORK, WORK, 1);
IDenseVector _IWORK(*LIWORK);
for (INTEGER i=1; i<*LIWORK; ++i) {
_IWORK(i) = IWORK[i-1];
}
BDenseVector _BWORK(*N);
for (INTEGER i=1; i<*N; ++i) {
_BWORK(i) = BWORK[i-1];
}
//
// Test if work has at least minimal worksize
//
auto wsQuery = esx_wsq(wantVS, sense, _A);
INTEGER minWork = wsQuery.first;
if (*LWORK<minWork && !lQuery) {
*INFO = 16;
} else if (*LIWORK<1 && !lQuery) {
*INFO = 18;
}
if (*INFO!=0) {
LAPACK_ERROR("DGEESX", INFO);
*INFO = -(*INFO);
return;
}
//
// Call FLENS implementation
//
SelectFunction<DOUBLE> select(SELECT);
esx(wantVS, wantST, select, sense, _A, _SDIM, _WR, _WI, _VS,
*RCONDE, *RCONDV, _WORK, _IWORK, _BWORK);
*SDIM = _SDIM;
for (INTEGER i=1; i<*LIWORK; ++i) {
IWORK[i-1] = _IWORK(i);
}
for (INTEGER i=1; i<*N; ++i) {
BWORK[i-1] = _BWORK(i);
}
}
//-- zgeesx --------------------------------------------------------------------
void
LAPACK_DECL(zgeesx)(const char *JOBVS,
const char *SORT,
LOGICAL (*SELECT)(const DOUBLE_COMPLEX *),
const char *SENSE,
const INTEGER *N,
DOUBLE_COMPLEX *A,
const INTEGER *LDA,
INTEGER *SDIM,
DOUBLE_COMPLEX *W,
DOUBLE_COMPLEX *VS,
const INTEGER *LDVS,
DOUBLE *RCONDE,
DOUBLE *RCONDV,
DOUBLE_COMPLEX *WORK,
const INTEGER *LWORK,
DOUBLE *RWORK,
LOGICAL *BWORK,
INTEGER *INFO)
{
using std::max;
using std::min;
//
// Test the input parameters so that we pass LAPACK error checks
//
*INFO = 0;
const bool lQuery = (*LWORK==-1);
const bool wantVS = (*JOBVS=='V');
const bool wantST = (*SORT=='S');
const bool wantSN = (*SENSE=='N');
const bool wantSE = (*SENSE=='E');
const bool wantSV = (*SENSE=='V');
const bool wantSB = (*SENSE=='B');
if ((!wantVS) && (*JOBVS!='N')) {
*INFO = 1;
} else if ((!wantST) && (*SORT!='N')) {
*INFO = 2;
} else if (!(wantSN || wantSE || wantSV || wantSB)
|| ( !wantST && !wantSN))
{
*INFO = 4;
} else if (*N<0) {
*INFO = 5;
} else if (*LDA<max(INTEGER(1),*N)) {
*INFO = 7;
} else if (*LDVS<1 || (wantVS && *LDVS<*N)) {
*INFO = 11;
}
if (*INFO!=0) {
LAPACK_ERROR("ZGEESX", INFO);
*INFO = -(*INFO);
return;
}
//
// Setup FLENS matrix/vector types
//
typedef DGeMatrixView::IndexType IndexType;
SENSE::Sense sense = SENSE::Sense(*SENSE);
auto zA = reinterpret_cast<CXX_DOUBLE_COMPLEX *>(A);
auto zW = reinterpret_cast<CXX_DOUBLE_COMPLEX *>(W);
auto zVS = reinterpret_cast<CXX_DOUBLE_COMPLEX *>(VS);
auto zWORK = reinterpret_cast<CXX_DOUBLE_COMPLEX *>(WORK);
ZGeMatrixView _A = ZFSView(*N, *N, zA, *LDA);
IndexType _SDIM = *SDIM;
ZDenseVectorView _W = ZArrayView(*N, zW, 1);
ZGeMatrixView _VS = ZFSView(*N, *N, zVS, *LDVS);
ZDenseVectorView _WORK = ZArrayView(*LWORK, zWORK, 1);
DDenseVectorView _RWORK = DArrayView(*N, RWORK, 1);
BDenseVector _BWORK(*N);
for (INTEGER i=1; i<*N; ++i) {
_BWORK(i) = BWORK[i-1];
}
//
// Test if work has at least minimal worksize
//
auto wsQuery = esx_wsq(wantVS, sense, _A);
INTEGER minWork = wsQuery.first;
if (*LWORK<minWork && !lQuery) {
*INFO = 15;
}
if (*INFO!=0) {
LAPACK_ERROR("ZGEESX", INFO);
*INFO = -(*INFO);
return;
}
//
// Call FLENS implementation
//
SelectFunction<CXX_DOUBLE_COMPLEX> select(SELECT);
esx(wantVS, wantST, select, sense, _A, _SDIM, _W, _VS,
*RCONDE, *RCONDV, _WORK, _RWORK, _BWORK);
*SDIM = _SDIM;
for (INTEGER i=1; i<*N; ++i) {
BWORK[i-1] = _BWORK(i);
}
}
} // extern "C"
} } // namespace lapack, flens
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