2 // System.Reflection.Emit.OpCode
5 // Duncan Mak (duncan@ximian.com)
7 // Permission is hereby granted, free of charge, to any person obtaining
8 // a copy of this software and associated documentation files (the
9 // "Software"), to deal in the Software without restriction, including
10 // without limitation the rights to use, copy, modify, merge, publish,
11 // distribute, sublicense, and/or sell copies of the Software, and to
12 // permit persons to whom the Software is furnished to do so, subject to
13 // the following conditions:
15 // The above copyright notice and this permission notice shall be
16 // included in all copies or substantial portions of the Software.
18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
29 using System.Runtime.InteropServices;
31 namespace System.Reflection.Emit {
34 public struct OpCode {
36 internal byte op1, op2;
37 byte push, pop, size, type, args, flow;
41 // Op1, Op2, StackBehaviourPush, StackBehaviourPop
42 // Size, OpCodeType, OperandType, FlowControl
44 internal OpCode (int p, int q)
47 op1 = (byte) ((p >> 0) & 0xFF);
48 op2 = (byte) ((p >> 8) & 0xFF);
49 push = (byte) ((p >> 16) & 0xFF);
50 pop = (byte) ((p >> 24) & 0xFF);
52 size = (byte) ((q >> 0) & 0xFF);
53 type = (byte) ((q >> 8) & 0xFF);
54 args = (byte) ((q >> 16) & 0xFF);
55 flow = (byte) ((q >> 24) & 0xFF);
59 public override int GetHashCode ()
61 return Name.GetHashCode ();
64 public override bool Equals (Object obj)
66 if (obj == null || !(obj is OpCode))
69 OpCode v = (OpCode) obj;
71 return v.op1 == op1 && v.op2 == op2;
74 public bool Equals (OpCode obj)
76 return obj.op1 == op1 && obj.op2 == op2;
79 public override string ToString ()
87 return OpCodeNames.names [op2];
89 return OpCodeNames.names [256 + op2];
99 public OpCodeType OpCodeType {
101 return (OpCodeType) type;
105 public OperandType OperandType {
107 return (OperandType) args;
111 public FlowControl FlowControl {
113 return (FlowControl) flow;
117 public StackBehaviour StackBehaviourPop {
119 return (StackBehaviour) pop;
123 public StackBehaviour StackBehaviourPush {
125 return (StackBehaviour) push;
134 // two byte instruction - combine
135 // Some old MS betas returned (op1 << 2) | op2 here...
136 return (short) ((op1 << 8) | op2);
141 public static bool operator == (OpCode a, OpCode b)
143 return a.op1 == b.op1 && a.op2 == b.op2;
146 public static bool operator != (OpCode a, OpCode b)
148 return a.op1 != b.op1 || a.op2 != b.op2;