Subroutine mld_precaply

mld_precaply(p,x,y,desc_a,info)
mld_precaply(p,x,y,desc_a,info,trans,work)

This routine computes $y = op(M^{-1}) x$, where $M$ is a previously built preconditioner, stored into p, and $op$ denotes the preconditioner itself or its transpose, according to the value of trans. Note that, when MLD2P4 is used with a Krylov solver from PSBLAS, mld_precaply is called within the PSBLAS routine mld_krylov and hence it is completely transparent to the user.