net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/am2910/GUIAm2910RegCntr.java

   1 package net.mograsim.logic.model.am2900.components.am2910;
   2
   3 import static net.mograsim.logic.core.types.Bit.ONE;
   4 import static net.mograsim.logic.core.types.Bit.U;
   5 import static net.mograsim.logic.core.types.Bit.ZERO;
   6
   7 import java.util.Arrays;
   8 import java.util.Map;
   9
  10 import net.mograsim.logic.core.types.Bit;
  11 import net.mograsim.logic.core.wires.Wire.ReadEnd;
  12 import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;
  13 import net.mograsim.logic.model.model.ViewModelModifiable;
  14 import net.mograsim.logic.model.model.components.atomic.SimpleRectangularHardcodedGUIComponent;
  15 import net.mograsim.logic.model.model.wires.Pin;
  16 import net.mograsim.logic.model.model.wires.PinUsage;
  17 import net.mograsim.logic.model.serializing.IndirectGUIComponentCreator;
  18 import net.mograsim.logic.model.snippets.symbolrenderers.PinNamesSymbolRenderer.PinNamesParams.Position;
  19
  20 public class GUIAm2910RegCntr extends SimpleRectangularHardcodedGUIComponent
  21 {
  22         public GUIAm2910RegCntr(ViewModelModifiable model, String name)
  23         {
  24                 super(model, name, "Register/\nCounter");
  25                 setSize(40, 40);
  26                 addPin(new Pin(this, "D", 12, PinUsage.INPUT, 20, 0), Position.BOTTOM);
  27                 addPin(new Pin(this, "_RLD", 1, PinUsage.INPUT, 0, 5), Position.RIGHT);
  28                 addPin(new Pin(this, "WE", 1, PinUsage.INPUT, 0, 20), Position.RIGHT);
  29                 addPin(new Pin(this, "DEC", 1, PinUsage.INPUT, 0, 30), Position.RIGHT);
  30                 addPin(new Pin(this, "C", 1, PinUsage.INPUT, 40, 20), Position.LEFT);
  31                 addPin(new Pin(this, "Y", 12, PinUsage.OUTPUT, 20, 40), Position.TOP);
  32         }
  33
  34         @Override
  35         protected Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
  36         {
  37                 Bit[] QC = (Bit[]) lastState;
  38                 if (QC == null)
  39                 {
  40                         QC = new Bit[13];
  41                         Arrays.fill(QC, U);
  42                 }
  43
  44                 ReadEnd D = readEnds.get("D");
  45                 ReadEnd _RLD = readEnds.get("_RLD");
  46                 ReadEnd WE = readEnds.get("WE");
  47                 ReadEnd DEC = readEnds.get("DEC");
  48                 ReadEnd C = readEnds.get("C");
  49                 ReadWriteEnd Y = readWriteEnds.get("Y");
  50
  51                 Bit oldCVal = QC[12];
  52                 Bit CVal = C.getValue();
  53
  54                 // TODO handle U/X/Z
  55                 if (oldCVal == ZERO && CVal == ONE)
  56                 {
  57                         if ((DEC.getValue() == ZERO && WE.getValue() == ONE) || _RLD.getValue() == ZERO)
  58                                 System.arraycopy(D.getValues().getBits(), 0, QC, 0, 12);
  59                         else if (WE.getValue() == ONE)
  60                         {
  61                                 Bit carry = Bit.ZERO;
  62                                 // TODO extract to helper. This code almost also exists in GUIinc12.
  63                                 // TODO maybe invert loop direction
  64                                 for (int i = 11; i >= 0; i--)
  65                                 {
  66                                         Bit a = QC[i];
  67                                         QC[i] = a.xnor(carry);
  68                                         carry = a.or(carry);
  69                                 }
  70                         }
  71                 }
  72                 QC[12] = CVal;
  73                 Y.feedSignals(Arrays.copyOfRange(QC, 0, 12));
  74
  75                 return QC;
  76         }
  77
  78         static
  79         {
  80                 IndirectGUIComponentCreator.setComponentSupplier(GUIAm2910RegCntr.class.getCanonicalName(),
  81                                 (m, p, n) -> new GUIAm2910RegCntr(m, n));
  82         }
  83 }