hex.sign_extend

sign-extends hex[:signed_n] into hex[:full_n]

Signature

def sign_extend full_n, signed_n, hex @ negative, positive { ... }

Defined in hex/math_basic.fj — lines 212–218 (view on GitHub).

Complexity

• Time: (full_n - signed_n)(@+4)

• Space: (full_n - signed_n)(@+16)

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

Source

Click to view the macro body

def sign_extend full_n, signed_n, hex @ negative, positive {
    .zero full_n - signed_n, hex + signed_n * dw
    .sign signed_n, hex, negative, positive
  negative:
    .not full_n - signed_n, hex + signed_n * dw
  positive:
}

Depends on

• hex.not/2

• hex.sign

• hex.zero/2

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