Comment by svachalek

Nice. The way I read the cmove version, it's more or less this except the trick line goes

    res += (c == 's') ? 1 : (c == 'p') ? -1 : 0

I haven't done C in decades so I don't trust myself to performance test this but I'm curious how it compares. Pretty disappointed that TFA didn't go back and try that in C.