get8
x = get8();
x = (x << 8) | get8();
x = (x << 8) | get8();
x = (x << 8) | get8();
x = (x << 8) | get8();
x = (x << 8) | get8();
x = (x << 8) | get8();
return (x << 8) | get8();
uint8_t op = get8() & 0xf;