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/petsc/src/ksp/ksp/impls/fcg/
H A Dfcg.c78 Vec B, R, Z, X, Pcurr, Ccurr; in KSPSolve_FCG() local
154 Ccurr = fcg->Cvecs[idx]; in KSPSolve_FCG()
204 PetscCall(KSP_MatMult(ksp, Amat, Pcurr, Ccurr)); /* w <- A*pi (stored in ci) */ in KSPSolve_FCG()
206 PetscCall(VecXDot(Pcurr, Ccurr, &dpi)); /* dpi <- pi'*w */ in KSPSolve_FCG()
216 PetscCall(VecAXPY(R, -alpha, Ccurr)); /* r <- r - alpha * wi */ in KSPSolve_FCG()
263 PetscCall(VecScale(Ccurr, 1.0 / dpi)); /* w <- ci/dpi */ in KSPSolve_FCG()