`hex.sub` (arity 3)¶

dst[:n] -= src[:n]

Signature¶

def sub n, dst, src { ... }

Defined in hex/math.fj — lines 165–169 (view on GitHub).

See the complexity glossary for what @, w, dw, dbit, n mean.

The following must be initialised before this macro is invoked:

Click to view the macro body

def sub n, dst, src {
    .sub.clear_carry
    rep(n, i) .sub dst+i*dw, src+i*dw
    .sub.clear_carry
}