1/*
2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25using System;
26using System.Collections.Generic;
27
28class OpcodeCall : Opcode {
29
30	Word target;
31
32	internal OpcodeCall() : this(null)
33	{
34	}
35
36	internal OpcodeCall(Word target)
37	{
38		this.target = target;
39	}
40
41	internal override void ResolveTarget(Word target)
42	{
43		if (this.target != null) {
44			throw new Exception("Opcode already resolved");
45		}
46		this.target = target;
47	}
48
49	internal override void Run(CPU cpu)
50	{
51		target.Run(cpu);
52	}
53
54	internal override Word GetReference(T0Comp ctx)
55	{
56		if (target == null) {
57			throw new Exception("Unresolved call target");
58		}
59		return target;
60	}
61
62	internal override CodeElement ToCodeElement()
63	{
64		return new CodeElementUInt((uint)target.Slot);
65	}
66
67	public override string ToString()
68	{
69		return "call " + (target == null ? "UNRESOLVED" : target.Name);
70	}
71}
72