This repository was archived by the owner on Apr 27, 2023. It is now read-only.

This repository was archived by the owner on Apr 27, 2023. It is now read-only.

Instruction Proposal: xc.sbox.4 #52

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An instruction implementing an in-place 4-bit sbox

The concatenation of crs1 and crs2 describes the sbox, where the i'th nibble corresponds to sbox[i].

xc.sbox.4 crd, crs1, crs2
    let t = crs1 || crs2
    for i in 0..15
        let sbox[i] = t[4*i+3 :4*i]
    for i in 0..15
        let crd[4*i+3: 4*i] = sbox[crd[i]]

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