Splevin ARX

random_part.c

 static void fast_mix(struct fast_pool *f)
{
        __u32 a = f->pool[0],   b = f->pool[1];
        __u32 c = f->pool[2],   d = f->pool[3];

        a += b;                 c += d;
        b = rol32(b, 6);        d = rol32(d, 27);
        d ^= a;                 b ^= c;

        a += b;                 c += d;
        b = rol32(b, 16);       d = rol32(d, 14);
        d ^= a;                 b ^= c;

        a += b;                 c += d;
        b = rol32(b, 6);        d = rol32(d, 27);
        d ^= a;                 b ^= c;

        a += b;                 c += d;
        b = rol32(b, 16);       d = rol32(d, 14);
        d ^= a;                 b ^= c;

        f->pool[0] = a;  f->pool[1] = b;
        f->pool[2] = c;  f->pool[3] = d;
        f->count++;
}