bit.swap (arity 2)

a, b = b, a
a,b are bits.

Signature

def swap a, b @ a0, a1, notnot, end { ... }

Defined in bit/memory.fj — lines 94–104 (view on GitHub).

Complexity

• Time: 2@+5

• Space: 3@+8

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

Source

Click to view the macro body

def swap a, b @ a0, a1, notnot, end {
    .if a, a0, a1
  a0:
    .if b, end, notnot
  a1:
    .if b, notnot, end
  notnot:
    .not a
    .not b
  end:
}

Depends on

• bit.if/3

• bit.not/1

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