hex.add_mul (arity 4)

res[n] += a[n] * b[1]

Signature

def add_mul n, res, a, b < .mul.dst { ... }

Defined in hex/mul.fj — lines 23–29 (view on GitHub).

Complexity

• Time: n(5@+26)

• Space: n(4@+52)

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

Requires init

The following must be initialised before this macro is invoked:

• hex.add.init (or hex.init)

Source

Click to view the macro body

def add_mul n, res, a, b < .mul.dst {
    .mul.clear_carry
    .xor .mul.dst, b
    rep(n, i) .add_mul res+i*dw, a+i*dw
    .xor .mul.dst, b
    .mul.clear_carry
}

Depends on

• hex.mul.clear_carry

• hex.xor/2

Used by

• hex.mul

• hex.mul10

Example uses

• hex.mul10 in hex/mul.fj

• hex.mul in hex/mul.fj

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