Changeset 3462 for trunk/sources/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.3/Compiler/Instruction.cs

Timestamp:

04/21/10 15:21:34 (14 years ago)

Author:

gkronber

Message:

Refactored symbolic expression tree encoding and problem classes for symbolic regression. #937 , #938

Location:

trunk/sources/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.3/Compiler

Files:

• . (added)
• Instruction.cs (moved) (moved from trunk/sources/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.3/Instruction.cs) (1 diff)

trunk/sources/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.3/Compiler/Instruction.cs

@@ -26 +26 @@
 using System.Collections.Generic;
 using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
-using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.GeneralSymbols;
+using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Symbols;
 
-namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding {
-  public enum CodeSymbol : byte { 
-    Add,
-    Sub,
-    Mul,
-    Div,
-    Call,
-    Arg,
-    Values,
-    Dynamic
-  };
+namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Compiler {
+  // total size of this struct should be small to improve cache access while executing the code
+  // should be aligned to 8/16/32 byte
+  // size = 4(8) + 1 + 1 + 2 = 8 (12)
   public struct Instruction {
+    // the tree node can hold additional data that is necessary for the execution of this instruction
+    public SymbolicExpressionTreeNode dynamicNode;
+    // op code of the function that determines what operation should be executed
+    public byte opCode;
+    // number of arguments of the current instruction
     public byte nArguments;
-    public CodeSymbol symbol;
-    public short iArg0;
-    public SymbolicExpressionTreeNode dynamicNode;
+    // an optional short value (addresses for calls, argument index for arguments)
+    public ushort iArg0;
   }
 }