gistfile1.txt

static int[] t = {0, 5, 1, 6, 4, 3, 2, 7};

int foo(final byte value) {
  int x = value & 0xff;
  x |= x >> 1;
  x |= x >> 2;
  x |= x >> 4;
  x *= 0x1d;
  x &= 0xff;
  x >>= 5;
  return t[x];
}