Function stgexc_

Reorders the generalized real Schur decomposition of a real matrix pair (A,B) using an orthogonal equivalence transformation so that the diagonal block of (A,B) with row index IFST is moved to row ILST.

extern(C) void stgexc_ (
  int* wantq,
  int* wantz,
  int* n,
  float* a,
  int* lda,
  float* b,
  int* ldb,
  float* q,
  int* ldq,
  float* z,
  int* ldz,
  int* ifst,
  int* ilst,
  float* work,
  int* lwork,
  int* info
);