_ f(int a, int b, int c, int d, int e, int f, int g, int h, int i, int j) {
return (f, j, a, b, i, g, d, e, h, c); ;; optimal code is 3 ops, 6 bytes
;; s6 s0 s4 XCHG3 s4 s8 s9 XCHG3 8 0 REVERSE
}