Function rrot

bitvm/src/hash/sha256.rs:940–945

(x: u32, n: usize)

    }

    fn rrot(x: u32, n: usize) -> u32 {
        if n == 0 {
            return x;
        }
        (x >> n) | (x << (32 - n))
    }

    #[test]
    fn test_sha256() {