+++ /dev/null
-package net.mograsim.logic.model.am2900.components.am2910;
-
-import static net.mograsim.logic.core.types.Bit.ONE;
-import static net.mograsim.logic.core.types.Bit.U;
-import static net.mograsim.logic.core.types.Bit.X;
-import static net.mograsim.logic.core.types.Bit.ZERO;
-
-import java.util.Map;
-
-import net.mograsim.logic.core.types.Bit;
-import net.mograsim.logic.core.types.BitVector;
-import net.mograsim.logic.core.wires.CoreWire.ReadEnd;
-import net.mograsim.logic.core.wires.CoreWire.ReadWriteEnd;
-import net.mograsim.logic.model.model.LogicModelModifiable;
-import net.mograsim.logic.model.model.components.atomic.SimpleRectangularHardcodedModelComponent;
-import net.mograsim.logic.model.model.wires.Pin;
-import net.mograsim.logic.model.model.wires.PinUsage;
-import net.mograsim.logic.model.serializing.IndirectModelComponentCreator;
-import net.mograsim.logic.model.snippets.symbolrenderers.PinNamesSymbolRenderer.PinNamesParams.Position;
-
-public class ModelAm2910SP extends SimpleRectangularHardcodedModelComponent
-{
- public ModelAm2910SP(LogicModelModifiable model, String name)
- {
- super(model, "Am2910SP", name, "Stack\npointer", false);
- setSize(40, 30);
- addPin(new Pin(model, this, "STKI0", 1, PinUsage.INPUT, 0, 5), Position.RIGHT);
- addPin(new Pin(model, this, "STKI1", 1, PinUsage.INPUT, 0, 15), Position.RIGHT);
- addPin(new Pin(model, this, "C", 1, PinUsage.INPUT, 0, 25), Position.RIGHT);
- addPin(new Pin(model, this, "A", 3, PinUsage.OUTPUT, 10, 30), Position.TOP);
- addPin(new Pin(model, this, "B", 3, PinUsage.OUTPUT, 30, 30), Position.TOP);
- addPin(new Pin(model, this, "_FULL", 1, PinUsage.OUTPUT, 40, 15), Position.LEFT);
-
- init();
- }
-
- @Override
- public Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
- {
- BitAndInt SPC = castAndInitState(lastState);
- int SP = SPC.i;
-
- Bit STKI0Val = readEnds.get("STKI0").getValue();
- Bit STKI1Val = readEnds.get("STKI1").getValue();
- Bit CVal = readEnds.get("C").getValue();
- if (SPC.bit == ZERO && CVal == ONE)
- if (STKI0Val == U && STKI1Val == U)
- SP = -2;
- else if (!STKI0Val.isBinary() || !STKI1Val.isBinary())
- SP = -1;
- else if (STKI0Val == ONE && STKI1Val == ZERO)
- {
- // PUSH
- if (SP >= 0)
- SP = SP == 5 ? 5 : SP + 1;
- } else if (STKI0Val == ZERO && STKI1Val == ONE)
- // CLEAR
- SP = 0;
- else if (STKI0Val == ONE && STKI1Val == ONE)
- // POP
- SP = SP <= 0 ? SP : SP - 1;
- readWriteEnds.get("A").feedSignals(getAsBitVector(SP == 0 ? 7 : SP < 0 ? SP : SP - 1));
- readWriteEnds.get("B").feedSignals(getAsBitVector(SP == 5 ? 4 : SP));
- readWriteEnds.get("_FULL").feedSignals(SP == -2 ? U : SP == -1 ? X : SP == 5 ? ZERO : ONE);
-
- SPC.i = SP;
- SPC.bit = CVal;
- return SPC;
- }
-
- @Override
- protected Object getHighLevelState(Object state, String stateID)
- {
- BitAndInt SPC = castAndInitState(state);
-
- switch (stateID)
- {
- case "q":
- return getAsBitVector(SPC.i);
- default:
- return super.getHighLevelState(SPC, stateID);
- }
- }
-
- @Override
- protected Object setHighLevelState(Object lastState, String stateID, Object newHighLevelState)
- {
- BitAndInt SPC = castAndInitState(lastState);
-
- switch (stateID)
- {
- case "q":
- int i;
- BitVector newHighLevelStateCasted = (BitVector) newHighLevelState;
- if (newHighLevelStateCasted.length() != 3)
- throw new IllegalArgumentException("Expected BitVector of length 3, not " + newHighLevelStateCasted.length());
- if (newHighLevelStateCasted.isBinary())
- i = newHighLevelStateCasted.getUnsignedValue().intValue();
- else
- i = -1;// this makes setting to U impossible
- if (i > 5)
- throw new IllegalArgumentException("Given value not in range (0-5 incl.): " + i);
- SPC.i = i;
- return SPC;
- default:
- return super.setHighLevelState(SPC, stateID, newHighLevelState);
- }
- }
-
- private static BitAndInt castAndInitState(Object lastState)
- {
- BitAndInt SPC = (BitAndInt) lastState;
- if (SPC == null)
- {
- SPC = new BitAndInt();
- SPC.bit = U;
- SPC.i = -2;
- }
- return SPC;
- }
-
- private static class BitAndInt
- {
- Bit bit;
- int i;
- }
-
- /**
- * -1 means X, -2 means U
- */
- private static BitVector getAsBitVector(int i)
- {
- if (i == -1)
- return BitVector.of(X, 3);
- if (i == -2)
- return BitVector.of(U, 3);
- return BitVector.of((i & 0b100) > 0 ? ONE : ZERO, (i & 0b10) > 0 ? ONE : ZERO, (i & 0b1) > 0 ? ONE : ZERO);
- }
-
- static
- {
- IndirectModelComponentCreator.setComponentSupplier(ModelAm2910SP.class.getCanonicalName(), (m, p, n) -> new ModelAm2910SP(m, n));
- }
-}
\ No newline at end of file
projects / Mograsim.git / blobdiff