net.mograsim.machine/src/net/mograsim/machine/mi/MicroInstructionDefinition.java

   1 package net.mograsim.machine.mi;
   2
   3 import java.math.BigInteger;
   4
   5 import net.mograsim.machine.mi.parameters.IntegerClassification;
   6 import net.mograsim.machine.mi.parameters.IntegerImmediate;
   7 import net.mograsim.machine.mi.parameters.MicroInstructionParameter;
   8 import net.mograsim.machine.mi.parameters.MnemonicFamily;
   9 import net.mograsim.machine.mi.parameters.ParameterClassification;
  10 import net.mograsim.machine.mi.parameters.MicroInstructionParameter.ParameterType;
  11
  12 public interface MicroInstructionDefinition
  13 {
  14         /**
  15          * @return The {@link ParameterClassification}s of which a MicroInstruction is composed.
  16          */
  17         public ParameterClassification[] getParameterClassifications();
  18
  19         /**
  20          * @throws IndexOutOfBoundsException
  21          */
  22         public ParameterClassification getParameterClassification(int index);
  23
  24
  25         /**
  26          * @return The amount of {@link MicroInstructionParameter}s in a {@link MicroInstruction} that follows this definition.
  27          */
  28         public default int size()
  29         {
  30                 return getParameterClassifications().length;
  31         }
  32
  33         public default MicroInstruction createDefaultInstruction()
  34         {
  35                 int size = size();
  36                 MicroInstructionParameter[] params = new MicroInstructionParameter[size];
  37                 ParameterClassification[] classes = getParameterClassifications();
  38                 for(int i = 0; i < size; i++)
  39                 {
  40                         MicroInstructionParameter newParam;
  41                         ParameterClassification classification = classes[i];
  42                         ParameterType type = classification.getExpectedType();
  43                         switch(type)
  44                         {
  45                         case BOOLEAN_IMMEDIATE:
  46                         case MNEMONIC:
  47                                 newParam = ((MnemonicFamily) classification).get(0);
  48                                 break;
  49                         case INTEGER_IMMEDIATE:
  50                                 newParam = new IntegerImmediate(BigInteger.valueOf(0), ((IntegerClassification) classification).getExpectedBits());
  51                                 break;
  52                         default:
  53                                 throw new IllegalStateException("Unknown ParameterType " + type);
  54                         }
  55                         params[i] = newParam;
  56                 }
  57                 return new StandardMicroInstruction(params);
  58         }
  59
  60         public static MicroInstructionDefinition create(ParameterClassification... classes)
  61         {
  62                 return new StandardMicroInstructionDefinition(classes);
  63         }
  64 }