Home Browse Files
      1
      2
      3
      4
      5
      6
      7
      8
      9
     10
     11
     12
     13
     14
     15
     16
     17
     18
     19
     20
     21
     22
     23
     24
     25
     26
     27
     28
     29
     30
     31
     32
     33
     34
     35
     36
     37
     38
     39
     40
     41
     42
     43
     44
     45
     46
     47
     48
     49
     50
     51
     52
     53
     54
     55
     56
     57
     58
     59
     60
     61
     62
     63
     64
     65
     66
     67
     68
     69
     70
     71
     72
     73
     74
     75
     76
     77
     78
     79
     80
     81
     82
     83
     84
     85
     86
     87
     88
     89
     90
     91
     92
     93
     94
     95
     96
     97
     98
     99
     100
#include <flens/lapack/interface/include/config.h>


namespace flens { namespace lapack {

extern "C" {

//-- dgeqrf --------------------------------------------------------------------
void
LAPACK_DECL(dgeqp3)(const INTEGER    *M,
                    const INTEGER    *N,
                    DOUBLE           *A,
                    const INTEGER    *LDA,
                    INTEGER          *JPVT,
                    DOUBLE           *TAU,
                    DOUBLE           *WORK,
                    const INTEGER    *LWORK,
                    INTEGER          *INFO)
{
    using std::max;
    using std::min;
//
//  Test the input parameters so that we pass LAPACK error checks
//
    *INFO = 0;
    if (*M<0) {
        *INFO = -1;
    } else if (*N<0) {
        *INFO = -2;
    } else if (*LDA<std::max(INTEGER(1), *M)) {
        *INFO = -4;
    } else if (*LWORK<3*(*N)+1) {
        *INFO = -8;
    }
    if (*INFO!=0) {
        *INFO = -(*INFO);
        LAPACK_ERROR("DGEQP3", INFO);
        *INFO = -(*INFO);
        return;
    }

    DGeMatrixView       _A      = DFSView(*M, *N, A, *LDA);
    IDenseVectorView    _JPVT   = IArrayView(*N, JPVT, 1);
    DDenseVectorView    _TAU    = DArrayView(min(*M,*N), TAU, 1);
    DDenseVectorView    _WORK   = DArrayView(*LWORK, WORK, 1);

    qp3(_A, _JPVT, _TAU, _WORK);
}

//-- zgeqrf --------------------------------------------------------------------
void
LAPACK_DECL(zgeqp3)(const INTEGER    *M,
                    const INTEGER    *N,
                    DOUBLE_COMPLEX   *A,
                    const INTEGER    *LDA,
                    INTEGER          *JPVT,
                    DOUBLE_COMPLEX   *TAU,
                    DOUBLE_COMPLEX   *WORK,
                    const INTEGER    *LWORK,
                    DOUBLE           *RWORK,
                    INTEGER          *INFO)
{
    using std::max;
    using std::min;
//
//  Test the input parameters so that we pass LAPACK error checks
//
    *INFO = 0;
    if (*M<0) {
        *INFO = -1;
    } else if (*N<0) {
        *INFO = -2;
    } else if (*LDA<std::max(INTEGER(1), *M)) {
        *INFO = -4;
    } else if (*LWORK<(*N)+1) {
        *INFO = -8;
    }
    if (*INFO!=0) {
        *INFO = -(*INFO);
        LAPACK_ERROR("ZGEQP3", INFO);
        *INFO = -(*INFO);
        return;
    }

    auto zA    = reinterpret_cast<CXX_DOUBLE_COMPLEX *>(A);
    auto zTAU  = reinterpret_cast<CXX_DOUBLE_COMPLEX *>(TAU);
    auto zWORK = reinterpret_cast<CXX_DOUBLE_COMPLEX *>(WORK);

    ZGeMatrixView       _A      = ZFSView(*M, *N, zA, *LDA);
    IDenseVectorView    _JPVT   = IArrayView(*N, JPVT, 1);
    ZDenseVectorView    _TAU    = ZArrayView(min(*M,*N), zTAU, 1);
    ZDenseVectorView    _WORK   = ZArrayView(*LWORK, zWORK, 1);
    DDenseVectorView    _RWORK  = DArrayView(2*(*N), RWORK, 1);

    qp3(_A, _JPVT, _TAU, _WORK, _RWORK);
}

} // extern "C"

} } // namespace lapack, flens





































































































Home