net.mograsim.machine/src/net/mograsim/machine/standard/memory/WordAddressableMemory.java

   1 package net.mograsim.machine.standard.memory;
   2
   3 import java.math.BigInteger;
   4
   5 import net.mograsim.logic.core.types.Bit;
   6 import net.mograsim.logic.core.types.BitVector;
   7 import net.mograsim.machine.GenericMemory;
   8 import net.mograsim.machine.MainMemory;
   9 import net.mograsim.machine.MainMemoryDefinition;
  10
  11 public class WordAddressableMemory extends GenericMemory<BitVector> implements MainMemory
  12 {
  13         private final int cellWidth;
  14         private final MainMemoryDefinition definition;
  15
  16         public WordAddressableMemory(MainMemoryDefinition definition)
  17         {
  18                 super(definition);
  19                 this.cellWidth = definition.getCellWidth();
  20                 this.definition = definition;
  21         }
  22
  23         @Override
  24         public BitVector getCell(long address)
  25         {
  26                 BitVector data = super.getCell(address);
  27                 return data == null ? BitVector.of(Bit.ZERO, cellWidth) : data;
  28         }
  29
  30         @Override
  31         public BigInteger getCellAsBigInteger(long address)
  32         {
  33                 BitVector data = getCell(address);
  34                 return data == null ? BigInteger.valueOf(0) : data.getUnsignedValue();
  35         }
  36
  37         @Override
  38         public void setCellAsBigInteger(long address, BigInteger data)
  39         {
  40                 setCell(address, BitVector.from(data, cellWidth));
  41         }
  42
  43         @Override
  44         public MainMemoryDefinition getDefinition()
  45         {
  46                 return definition;
  47         }
  48 }