void NewPoissonOp::axby( FArrayBox& a_lhs, const FArrayBox& a_x,
const FArrayBox& a_y, Real a_a, Real a_b)
{
a_lhs.copy(a_x);
a_lhs*=a_a;
a_lhs.plus(a_y, a_b);
}
void NewPoissonOp::incr( FArrayBox& a_lhs, const FArrayBox& a_x, Real a_scale)
{
a_lhs.plus(a_x, a_scale);
}