mcs/class/dlr/Runtime/Microsoft.Dynamic/Interpreter/Instructions/Instruction.cs

   1 /* ****************************************************************************
   2  *
   3  * Copyright (c) Microsoft Corporation.
   4  *
   5  * This source code is subject to terms and conditions of the Apache License, Version 2.0. A
   6  * copy of the license can be found in the License.html file at the root of this distribution. If
   7  * you cannot locate the  Apache License, Version 2.0, please send an email to
   8  * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
   9  * by the terms of the Apache License, Version 2.0.
  10  *
  11  * You must not remove this notice, or any other, from this software.
  12  *
  13  *
  14  * ***************************************************************************/
  15
  16 using System;
  17 using System.Collections.Generic;
  18 using System.Diagnostics;
  19 using System.Reflection;
  20 using System.Runtime.CompilerServices;
  21 using Microsoft.Scripting.Runtime;
  22 using Microsoft.Scripting.Utils;
  23
  24 namespace Microsoft.Scripting.Interpreter {
  25     public interface IInstructionProvider {
  26         void AddInstructions(LightCompiler compiler);
  27     }
  28
  29     public abstract partial class Instruction {
  30         public virtual int ConsumedStack { get { return 0; } }
  31         public virtual int ProducedStack { get { return 0; } }
  32         public virtual int ConsumedContinuations { get { return 0; } }
  33         public virtual int ProducedContinuations { get { return 0; } }
  34
  35         public int StackBalance {
  36             get { return ProducedStack - ConsumedStack; }
  37         }
  38
  39         public int ContinuationsBalance {
  40             get { return ProducedContinuations - ConsumedContinuations; }
  41         }
  42
  43         public abstract int Run(InterpretedFrame frame);
  44
  45         public virtual string InstructionName {
  46             get { return GetType().Name.Replace("Instruction", ""); }
  47         }
  48
  49         public override string ToString() {
  50             return InstructionName + "()";
  51         }
  52
  53         public virtual string ToDebugString(int instructionIndex, object cookie, Func<int, int> labelIndexer, IList<object> objects) {
  54             return ToString();
  55         }
  56
  57         public virtual object GetDebugCookie(LightCompiler compiler) {
  58             return null;
  59         }
  60     }
  61 }