net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/Modelinc12.java

   1 package net.mograsim.logic.model.am2900.components;
   2
   3 import static net.mograsim.logic.core.types.Bit.U;
   4 import static net.mograsim.logic.core.types.Bit.X;
   5 import static net.mograsim.logic.core.types.Bit.Z;
   6 import static net.mograsim.logic.core.types.Bit.ZERO;
   7
   8 import java.util.Arrays;
   9 import java.util.Map;
  10
  11 import net.mograsim.logic.core.types.Bit;
  12 import net.mograsim.logic.core.wires.CoreWire.ReadEnd;
  13 import net.mograsim.logic.core.wires.CoreWire.ReadWriteEnd;
  14 import net.mograsim.logic.model.model.LogicModelModifiable;
  15 import net.mograsim.logic.model.model.components.atomic.SimpleRectangularHardcodedModelComponent;
  16 import net.mograsim.logic.model.model.wires.Pin;
  17 import net.mograsim.logic.model.model.wires.PinUsage;
  18 import net.mograsim.logic.model.serializing.IndirectModelComponentCreator;
  19 import net.mograsim.logic.model.snippets.symbolrenderers.PinNamesSymbolRenderer.PinNamesParams.Position;
  20
  21 public class Modelinc12 extends SimpleRectangularHardcodedModelComponent
  22 {
  23         public Modelinc12(LogicModelModifiable model, String name)
  24         {
  25                 super(model, "inc12", name, "Incrementer", false);
  26                 setSize(40, 20);
  27                 addPin(new Pin(model, this, "A", 12, PinUsage.INPUT, 20, 20), Position.TOP);
  28                 addPin(new Pin(model, this, "CI", 1, PinUsage.INPUT, 40, 10), Position.LEFT);
  29                 addPin(new Pin(model, this, "Y", 12, PinUsage.OUTPUT, 20, 0), Position.BOTTOM);
  30
  31                 init();
  32         }
  33
  34         @Override
  35         public Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
  36         {
  37                 Bit[] ABits = readEnds.get("A").getValues().getBits();
  38                 Bit CIVal = readEnds.get("CI").getValue();
  39                 Bit[] YBits = new Bit[12];
  40                 if (CIVal == X)
  41                         Arrays.fill(YBits, X);
  42                 else if (CIVal == U)
  43                         Arrays.fill(YBits, U);
  44                 else if (CIVal == Z)
  45                         Arrays.fill(YBits, X);
  46                 else if (CIVal == ZERO)
  47                         YBits = ABits;
  48                 else
  49                 {
  50                         Bit carry = Bit.ONE;
  51                         // TODO extract to helper. This code almost also exists in ModelAm2910RegCntr.
  52                         for (int i = 11; i >= 0; i--)
  53                         {
  54                                 Bit a = ABits[i];
  55                                 YBits[i] = a.xor(carry);
  56                                 carry = a.and(carry);
  57                         }
  58                 }
  59                 readWriteEnds.get("Y").feedSignals(YBits);
  60                 return null;
  61         }
  62
  63         static
  64         {
  65                 IndirectModelComponentCreator.setComponentSupplier(Modelinc12.class.getCanonicalName(), (m, p, n) -> new Modelinc12(m, n));
  66         }
  67 }