hex.abs

x[:n] = |x[:n]| (two’s complement; the minimal value -2^(4n-1) stays itself)

Signature

def abs n, x @ negative, end { ... }

Defined in hex/math_basic.fj — lines 201–206 (view on GitHub).

Complexity

• Time: 2@+4n

• Space: n(1.5@+20)

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

Source

Click to view the macro body

def abs n, x @ negative, end {
    .sign n, x, negative, end
  negative:
    .neg n, x
  end:
}

Depends on

• hex.neg

• hex.sign

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