uint32.rs - mozsearch

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pub fn eq_mask(a: u32, b: u32) -> u32 {

    let x = a ^ b;

    let minus_x = (!x).wrapping_add(1u32);

    let x_or_minus_x = x | minus_x;

    let xnx = x_or_minus_x.wrapping_shr(31);

    xnx.wrapping_sub(1u32)

pub fn gte_mask(a: u32, b: u32) -> u32 {

    let x = a;

    let y = b;

    let x_xor_y = x ^ y;

    let x_sub_y = x.wrapping_sub(y);

    let x_sub_y_xor_y = x_sub_y ^ y;

    let q = x_xor_y | x_sub_y_xor_y;

    let x_xor_q = x ^ q;

    let x_xor_q_ = x_xor_q.wrapping_shr(31);

    x_xor_q_.wrapping_sub(1u32)