Method emit_handler

src/codec.cpp:594–706

    }

    void ImmCodec::emit_handler(X64Emitter& e, const VMConfig& vm) const {
        const auto& r = vm.dispatcher_regs();

        // slot index → scratch_a; width byte → scratch_b
        emit_fetch_byte_dec(e, vm, r.scratch_a);
        emit_fetch_byte_dec(e, vm, r.scratch_b);

        // fetch the 4 obfuscation components, 8 bytes each, then compute
        // a + b xor c - d 
        e.sub_reg_imm32(rx::rsp, 48); // 32 for components, 16 for align

        // a -> [rsp+16]
        emit_fetch_uN_dec(
            e,
            vm,
            rx::rax,
            8
        );
        e.mov_mem_reg(
            rx::rsp,
            16,
            rx::rax,
            true
        );

        // b -> [rsp+24]
        emit_fetch_uN_dec(
            e,
            vm,
            rx::rax,
            8
        );
        e.mov_mem_reg(
            rx::rsp,
            24,
            rx::rax,
            true
        );

        // c -> [rsp+32]
        emit_fetch_uN_dec(
            e,
            vm,
            rx::rax,
            8
        );
        e.mov_mem_reg(
            rx::rsp,
            32,
            rx::rax,
            true
        );

        // d -> [rsp+40]
        emit_fetch_uN_dec(
            e,
            vm,
            rx::rax,