hex.swap (arity 3)

Unsafe if dst and src overlap! but safe if they are the exact same address.
hex1[:n], hex2[:n] = hex2[:n], hex1[:n]

Signature

def swap n, hex1, hex2 @ end { ... }

Defined in hex/memory.fj — lines 115–121 (view on GitHub).

Complexity

• Time: n(3@)

• Space: n(3@+36)

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

Source

Click to view the macro body

def swap n, hex1, hex2 @ end {
    stl.comp_if1 hex1==hex2, end
    .xor n, hex1, hex2
    .xor n, hex2, hex1
    .xor n, hex1, hex2
  end:
}

Depends on

• hex.xor/3

• stl.comp_if1

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