1 package net.mograsim.logic.model.am2900.components.am2910;
4 import static net.mograsim.logic.core.types.Bit.*;
6 import net.mograsim.logic.core.types.Bit;
7 import net.mograsim.logic.core.types.BitVector;
8 import net.mograsim.logic.core.wires.Wire.ReadEnd;
9 import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;
10 import net.mograsim.logic.model.model.ViewModelModifiable;
11 import net.mograsim.logic.model.model.components.atomic.SimpleRectangularHardcodedGUIComponent;
12 import net.mograsim.logic.model.model.wires.Pin;
13 import net.mograsim.logic.model.snippets.symbolrenderers.PinNamesSymbolRenderer.PinNamesParams.Position;
15 public class GUIAm2910SP extends SimpleRectangularHardcodedGUIComponent
17 public GUIAm2910SP(ViewModelModifiable model, String name)
19 super(model, name, "Stack\npointer");
21 addPin(new Pin(this, "STKI0", 1, 0, 5), Usage.INPUT, Position.RIGHT);
22 addPin(new Pin(this, "STKI1", 1, 0, 15), Usage.INPUT, Position.RIGHT);
23 addPin(new Pin(this, "C", 1, 0, 25), Usage.INPUT, Position.RIGHT);
24 addPin(new Pin(this, "A", 3, 10, 30), Usage.OUTPUT, Position.TOP);
25 addPin(new Pin(this, "B", 3, 30, 30), Usage.OUTPUT, Position.TOP);
26 addPin(new Pin(this, "_FULL", 1, 40, 15), Usage.OUTPUT, Position.LEFT);
30 protected Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
32 BitAndInt SPC = (BitAndInt) lastState;
35 SPC = new BitAndInt();
41 Bit STKI0Val = readEnds.get("STKI0").getValue();
42 Bit STKI1Val = readEnds.get("STKI1").getValue();
43 Bit CVal = readEnds.get("C").getValue();
44 if (SPC.bit == ZERO && CVal == ONE)
45 if (STKI0Val == U && STKI1Val == U)
47 else if (!STKI0Val.isBinary() || !STKI1Val.isBinary())
49 else if (STKI0Val == ONE && STKI1Val == ZERO)
53 SP = SP == 5 ? 5 : SP + 1;
54 } else if (STKI0Val == ZERO && STKI1Val == ONE)
57 else if (STKI0Val == ONE && STKI1Val == ONE)
59 SP = SP <= 0 ? SP : SP - 1;
60 readWriteEnds.get("A").feedSignals(getAsBitVector(SP == 0 ? 7 : SP - 1));
61 readWriteEnds.get("B").feedSignals(getAsBitVector(SP == 5 ? 4 : SP));
62 readWriteEnds.get("_FULL").feedSignals(SP == -2 ? U : SP == -1 ? X : SP == 5 ? ZERO : ONE);
69 private static class BitAndInt
76 * -1 means X, -2 means U
78 private static BitVector getAsBitVector(int i)
81 return BitVector.of(X, 3);
83 return BitVector.of(U, 3);
84 // TODO maybe this is the wrong way around
85 return BitVector.of((i & 0b100) > 0 ? ONE : ZERO, (i & 0b10) > 0 ? ONE : ZERO, (i & 0b1) > 0 ? ONE : ZERO);