Function emit_cipher_reset

src/codec.cpp:98–107

reload cipher_state from cipher_init

    // reload cipher_state from cipher_init 
    inline void emit_cipher_reset(X64Emitter& e, const VMConfig& vm) {
        const auto& r = vm.dispatcher_regs();
        const std::int32_t init_off = static_cast<std::int32_t>(vm.state_layout().cipher_extra) + kCipherInitOff;
        e.mov_reg_mem(
            r.cipher_state,
            r.state_ptr,
            init_off,
            true
        );
    }

    // fetch one byte from [ip], decrypt with current cipher state, update state,
    // advance ip, leave result in low 8 of dst