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.types.BitVector;
  12 import net.mograsim.logic.core.wires.Wire.ReadEnd;
  13 import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;
  14 import net.mograsim.logic.model.model.ViewModelModifiable;
  15 import net.mograsim.logic.model.model.components.atomic.SimpleRectangularHardcodedGUIComponent;
  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.IndirectGUIComponentCreator;
  19 import net.mograsim.logic.model.snippets.symbolrenderers.PinNamesSymbolRenderer.PinNamesParams.Position;
  20
  21 public class GUIAm2910RegCntr extends SimpleRectangularHardcodedGUIComponent
  22 {
  23         public GUIAm2910RegCntr(ViewModelModifiable model, String name)
  24         {
  25                 super(model, name, "Register/\nCounter");
  26                 setSize(40, 40);
  27                 addPin(new Pin(this, "D", 12, PinUsage.INPUT, 20, 0), Position.BOTTOM);
  28                 addPin(new Pin(this, "_RLD", 1, PinUsage.INPUT, 0, 5), Position.RIGHT);
  29                 addPin(new Pin(this, "WE", 1, PinUsage.INPUT, 0, 20), Position.RIGHT);
  30                 addPin(new Pin(this, "DEC", 1, PinUsage.INPUT, 0, 30), Position.RIGHT);
  31                 addPin(new Pin(this, "C", 1, PinUsage.INPUT, 40, 20), Position.LEFT);
  32                 addPin(new Pin(this, "Y", 12, PinUsage.OUTPUT, 20, 40), Position.TOP);
  33         }
  34
  35         @Override
  36         public Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
  37         {
  38                 Bit[] QC = (Bit[]) lastState;
  39                 if (QC == null)
  40                 {
  41                         QC = new Bit[13];
  42                         Arrays.fill(QC, U);
  43                 }
  44
  45                 ReadEnd D = readEnds.get("D");
  46                 ReadEnd _RLD = readEnds.get("_RLD");
  47                 ReadEnd WE = readEnds.get("WE");
  48                 ReadEnd DEC = readEnds.get("DEC");
  49                 ReadEnd C = readEnds.get("C");
  50                 ReadWriteEnd Y = readWriteEnds.get("Y");
  51
  52                 Bit oldCVal = QC[12];
  53                 Bit CVal = C.getValue();
  54
  55                 // TODO handle U/X/Z
  56                 if (oldCVal == ZERO && CVal == ONE)
  57                 {
  58                         if ((DEC.getValue() == ZERO && WE.getValue() == ONE) || _RLD.getValue() == ZERO)
  59                                 System.arraycopy(D.getValues().getBits(), 0, QC, 0, 12);
  60                         else if (WE.getValue() == ONE)
  61                         {
  62                                 Bit carry = Bit.ZERO;
  63                                 // TODO extract to helper. This code almost also exists in GUIinc12.
  64                                 // TODO maybe invert loop direction
  65                                 for (int i = 11; i >= 0; i--)
  66                                 {
  67                                         Bit a = QC[i];
  68                                         QC[i] = a.xnor(carry);
  69                                         carry = a.or(carry);
  70                                 }
  71                         }
  72                 }
  73                 QC[12] = CVal;
  74                 Y.feedSignals(Arrays.copyOfRange(QC, 0, 12));
  75
  76                 return QC;
  77         }
  78
  79         @Override
  80         protected Object getHighLevelState(Object state, String stateID)
  81         {
  82                 switch (stateID)
  83                 {
  84                 case "q":
  85                         return BitVector.of(Arrays.copyOfRange((Bit[]) state, 0, 12));
  86                 default:
  87                         return super.getHighLevelState(state, stateID);
  88                 }
  89         }
  90
  91         @Override
  92         protected Object setHighLevelState(Object lastState, String stateID, Object newHighLevelState)
  93         {
  94                 switch (stateID)
  95                 {
  96                 case "q":
  97                         BitVector newHighLevelStateCasted = (BitVector) newHighLevelState;
  98                         if (newHighLevelStateCasted.length() != 12)
  99                                 throw new IllegalArgumentException("Expected BitVector of length 12, not " + newHighLevelStateCasted.length());
 100                         System.arraycopy(newHighLevelStateCasted.getBits(), 0, lastState, 0, 12);
 101                         return lastState;
 102                 default:
 103                         return super.setHighLevelState(lastState, stateID, newHighLevelState);
 104                 }
 105         }
 106
 107         static
 108         {
 109                 IndirectGUIComponentCreator.setComponentSupplier(GUIAm2910RegCntr.class.getCanonicalName(),
 110                                 (m, p, n) -> new GUIAm2910RegCntr(m, n));
 111         }
 112 }