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#define STR(x) #x
#define STRING(x) STR(x)
#include <flens/lapack/interface/include/config.h>
namespace flens { namespace lapack {
extern "C" {
//-- dgesvx --------------------------------------------------------------------
void
LAPACK_DECL(dgesvx)(const char *FACT,
const char *TRANS,
const INTEGER *N,
const INTEGER *NRHS,
DOUBLE *A,
const INTEGER *LDA,
DOUBLE *AF,
const INTEGER *LDAF,
INTEGER *IPIV,
char *EQUED,
DOUBLE *R,
DOUBLE *C,
DOUBLE *B,
const INTEGER *LDB,
DOUBLE *X,
const INTEGER *LDX,
DOUBLE *RCOND,
DOUBLE *FERR,
DOUBLE *BERR,
DOUBLE *WORK,
INTEGER *IWORK,
INTEGER *INFO)
{
LAPACK_DEBUG_OUT("LAPACK INTERFACE: dgesvx");
//
// Test the input parameters so that we pass LAPACK error checks
//
typedef DOUBLE T;
typedef INTEGER IndexType;
const T Zero(0), One(1);
const T bigNum = One / lamch<T>(SafeMin);
bool rowEqu, colEqu;
if (*FACT=='N' || *FACT=='E') {
*EQUED = 'N';
rowEqu = false;
colEqu = false;
} else {
rowEqu = (*EQUED=='R' || *EQUED=='B');
colEqu = (*EQUED=='C' || *EQUED=='B');
}
*INFO = 0;
if (*FACT!='F' && *FACT!='N' && *FACT!='E') {
*INFO = -1;
} else if (*TRANS!='N' && *TRANS!='T' && *TRANS!='C') {
*INFO = -2;
} else if (*N<0) {
*INFO = -3;
} else if (*NRHS<0) {
*INFO = -4;
} else if (*LDA<std::max(INTEGER(1), *N)) {
*INFO = -6;
} else if (*LDAF<std::max(INTEGER(1), *N)) {
*INFO = -8;
} else if (*FACT=='F' && !(rowEqu || colEqu || *EQUED=='N')) {
*INFO = -10;
} else {
if (rowEqu) {
T rcMin = bigNum;
for (IndexType j=0; j<*N; ++j) {
rcMin = min(rcMin, R[j]);
}
if (rcMin<=Zero) {
*INFO = -11;
}
}
if (colEqu && *INFO==0) {
T rcMin = bigNum;
for (IndexType j=0; j<*N; ++j) {
rcMin = min(rcMin, C[j]);
}
if (rcMin<=Zero) {
*INFO = -12;
}
}
if (*INFO==0) {
if (*LDB<std::max(INTEGER(1), *N)) {
*INFO = -14;
} else if (*LDX<std::max(INTEGER(1), *N)) {
*INFO = -16;
}
}
}
if (*INFO!=0) {
*INFO = -(*INFO);
LAPACK_ERROR("DGESVX", INFO);
*INFO = -(*INFO);
return;
}
//
// Call FLENS implementation
//
SVX::Fact _FACT = SVX::Fact(*FACT);
Transpose _TRANS = cxxf77blas::getCxxBlasEnum<Transpose>(*TRANS);
DGeMatrixView _A = DFSView(*N, *N, *LDA, A);
DGeMatrixView _AF = DFSView(*N, *N, *LDAF, AF);
IDenseVectorView _IPIV = IArrayView(*N, IPIV, 1);
SVX::Equilibration _EQUED = SVX::Equilibration(*EQUED);
DDenseVectorView _R = DArrayView(*N, R, 1);
DDenseVectorView _C = DArrayView(*N, C, 1);
DGeMatrixView _B = DFSView(*N, *NRHS, *LDB, B);
DGeMatrixView _X = DFSView(*N, *NRHS, *LDX, X);
DDenseVectorView _FERR = DArrayView(*NRHS, FERR, 1);
DDenseVectorView _BERR = DArrayView(*NRHS, BERR, 1);
DDenseVectorView _WORK = DArrayView(*N*4, WORK, 1);
IDenseVectorView _IWORK = IArrayView(*N, IWORK, 1);
*INFO = svx(_FACT, _TRANS, _A, _AF, _IPIV, _EQUED, _R, _C, _B, _X, *RCOND,
_FERR, _BERR, _WORK, _IWORK);
*EQUED = char(_EQUED);
}
} // extern "C"
} } // namespace lapack, flens
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