Zig 0.17.0-dev (Split by item)

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mul

soft.mul

fn mul(a: u8, b: u8) u8

File

lib/std/crypto/aes/soft.zig:792

Code

fn mul(a: u8, b: u8) u8 {
    @setEvalBranchQuota(30000);

    var i: u8 = a;
    var j: u9 = b;
    var s: u9 = 0;

    while (i > 0) : (i >>= 1) {
        if (i & 1 != 0) {
            s ^= j;
        }

        j *= 2;
        if (j & 0x100 != 0) {
            j ^= poly;
        }
    }

    return @as(u8, @truncate(s));
}