net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/am2904/ModelAm2904RegCTInstrDecode.java

   1 package net.mograsim.logic.model.am2900.components.am2904;
   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.X;
   6 import static net.mograsim.logic.core.types.Bit.ZERO;
   7
   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.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 ModelAm2904RegCTInstrDecode extends SimpleRectangularHardcodedModelComponent
  22 {
  23         public ModelAm2904RegCTInstrDecode(LogicModelModifiable model, String name)
  24         {
  25                 super(model, "Am2904RegCTInstrDecode", name, "Instruction\ndecode", false);
  26                 setSize(80, 80);
  27                 addPin(new Pin(model, this, "I12-11", 2, PinUsage.INPUT, 0, 30), Position.RIGHT);
  28                 addPin(new Pin(model, this, "I5-0", 6, PinUsage.INPUT, 0, 50), Position.RIGHT);
  29                 // muSR MUX:
  30                 // 00: 0
  31                 // 01: 1
  32                 // 10: M
  33                 // 11: I
  34                 addPin(new Pin(model, this, "muSR_MUX", 2, PinUsage.OUTPUT, 80, 10), Position.LEFT);
  35                 addPin(new Pin(model, this, "muSR_OVRRET", 1, PinUsage.OUTPUT, 80, 20), Position.LEFT);
  36                 addPin(new Pin(model, this, "muSR_CINV", 1, PinUsage.OUTPUT, 80, 30), Position.LEFT);
  37                 addPin(new Pin(model, this, "muSR_WEZ", 1, PinUsage.OUTPUT, 80, 40), Position.LEFT);
  38                 addPin(new Pin(model, this, "muSR_WEC", 1, PinUsage.OUTPUT, 80, 50), Position.LEFT);
  39                 addPin(new Pin(model, this, "muSR_WEN", 1, PinUsage.OUTPUT, 80, 60), Position.LEFT);
  40                 addPin(new Pin(model, this, "muSR_WEOVR", 1, PinUsage.OUTPUT, 80, 70), Position.LEFT);
  41                 // MSR MUX:
  42                 // 000: 0
  43                 // 001: 1
  44                 // 010: mu
  45                 // 011: Y
  46                 // 100: I
  47                 // 101: I, invert C
  48                 // 110: Swap OVR and C
  49                 // 111: _M
  50                 addPin(new Pin(model, this, "MSR_MUX", 3, PinUsage.OUTPUT, 20, 0), Position.BOTTOM);
  51                 addPin(new Pin(model, this, "OEN", 1, PinUsage.OUTPUT, 60, 0), Position.BOTTOM);
  52                 // Y MUX:
  53                 // 00: mu
  54                 // 01: mu
  55                 // 10: M
  56                 // 11: I
  57                 addPin(new Pin(model, this, "Y_MUX", 2, PinUsage.OUTPUT, 10, 80), Position.TOP);
  58                 // CT MUX:
  59                 // see Am2900 Family Data Book, Am2904, Table 4 (CT_MUX2-0 = I3-1)
  60                 addPin(new Pin(model, this, "CT_MUX", 3, PinUsage.OUTPUT, 30, 80), Position.TOP);
  61                 addPin(new Pin(model, this, "CT_INV", 1, PinUsage.OUTPUT, 40, 80), Position.TOP);
  62                 addPin(new Pin(model, this, "CT_EXP", 1, PinUsage.OUTPUT, 50, 80), Position.TOP);
  63                 // C0 MUX:
  64                 // 00xx: 0
  65                 // 01xx: 1
  66                 // 10xx: CX
  67                 // 1100: muC
  68                 // 1101: _muC
  69                 // 1110: MC
  70                 // 1111: _MC
  71                 addPin(new Pin(model, this, "C0_MUX", 4, PinUsage.OUTPUT, 70, 80), Position.TOP);
  72
  73                 init();
  74         }
  75
  76         @Override
  77         public Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
  78         {
  79                 Bit[] I5_0Bits = readEnds.get("I5-0").getValues().getBits();
  80                 Bit[] I12_11Bits = readEnds.get("I12-11").getValues().getBits();
  81                 int IAsInt = 0;
  82                 for (int i = 0; i < 6; i++)
  83                         switch (I5_0Bits[5 - i])
  84                         {
  85                         case ONE:
  86                                 IAsInt |= 1 << i;
  87                                 break;
  88                         case U:
  89                                 for (ReadWriteEnd e : readWriteEnds.values())
  90                                         e.feedSignals(BitVector.of(U, e.width()));
  91                                 return null;
  92                         case X:
  93                         case Z:
  94                                 for (ReadWriteEnd e : readWriteEnds.values())
  95                                         e.feedSignals(BitVector.of(X, e.width()));
  96                                 return null;
  97                         case ZERO:
  98                                 break;
  99                         default:
 100                                 throw new IllegalArgumentException("Unknown enum constant: " + I5_0Bits[i]);
 101                         }
 102                 switch (IAsInt)
 103                 {
 104                 case 0:
 105                 case 2:
 106                         readWriteEnds.get("muSR_MUX").feedSignals(ONE, ZERO);
 107                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 108                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 109                         readWriteEnds.get("muSR_WEZ").feedSignals(ONE);
 110                         readWriteEnds.get("muSR_WEC").feedSignals(ONE);
 111                         readWriteEnds.get("muSR_WEN").feedSignals(ONE);
 112                         readWriteEnds.get("muSR_WEOVR").feedSignals(ONE);
 113                         break;
 114                 case 1:
 115                         readWriteEnds.get("muSR_MUX").feedSignals(ZERO, ONE);
 116                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 117                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 118                         readWriteEnds.get("muSR_WEZ").feedSignals(ONE);
 119                         readWriteEnds.get("muSR_WEC").feedSignals(ONE);
 120                         readWriteEnds.get("muSR_WEN").feedSignals(ONE);
 121                         readWriteEnds.get("muSR_WEOVR").feedSignals(ONE);
 122                         break;
 123                 case 3:
 124                         readWriteEnds.get("muSR_MUX").feedSignals(ZERO, ZERO);
 125                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 126                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 127                         readWriteEnds.get("muSR_WEZ").feedSignals(ONE);
 128                         readWriteEnds.get("muSR_WEC").feedSignals(ONE);
 129                         readWriteEnds.get("muSR_WEN").feedSignals(ONE);
 130                         readWriteEnds.get("muSR_WEOVR").feedSignals(ONE);
 131                         break;
 132                 case 6:
 133                 case 7:
 134                         readWriteEnds.get("muSR_MUX").feedSignals(ONE, ONE);
 135                         readWriteEnds.get("muSR_OVRRET").feedSignals(ONE);
 136                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 137                         readWriteEnds.get("muSR_WEZ").feedSignals(ONE);
 138                         readWriteEnds.get("muSR_WEC").feedSignals(ONE);
 139                         readWriteEnds.get("muSR_WEN").feedSignals(ONE);
 140                         readWriteEnds.get("muSR_WEOVR").feedSignals(ONE);
 141                         break;
 142                 case 8:
 143                         readWriteEnds.get("muSR_MUX").feedSignals(ZERO, ZERO);
 144                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 145                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 146                         readWriteEnds.get("muSR_WEZ").feedSignals(ONE);
 147                         readWriteEnds.get("muSR_WEC").feedSignals(ZERO);
 148                         readWriteEnds.get("muSR_WEN").feedSignals(ZERO);
 149                         readWriteEnds.get("muSR_WEOVR").feedSignals(ZERO);
 150                         break;
 151                 case 9:
 152                         readWriteEnds.get("muSR_MUX").feedSignals(ZERO, ONE);
 153                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 154                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 155                         readWriteEnds.get("muSR_WEZ").feedSignals(ONE);
 156                         readWriteEnds.get("muSR_WEC").feedSignals(ZERO);
 157                         readWriteEnds.get("muSR_WEN").feedSignals(ZERO);
 158                         readWriteEnds.get("muSR_WEOVR").feedSignals(ZERO);
 159                         break;
 160                 case 10:
 161                         readWriteEnds.get("muSR_MUX").feedSignals(ZERO, ZERO);
 162                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 163                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 164                         readWriteEnds.get("muSR_WEZ").feedSignals(ZERO);
 165                         readWriteEnds.get("muSR_WEC").feedSignals(ONE);
 166                         readWriteEnds.get("muSR_WEN").feedSignals(ZERO);
 167                         readWriteEnds.get("muSR_WEOVR").feedSignals(ZERO);
 168                         break;
 169                 case 11:
 170                         readWriteEnds.get("muSR_MUX").feedSignals(ZERO, ONE);
 171                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 172                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 173                         readWriteEnds.get("muSR_WEZ").feedSignals(ZERO);
 174                         readWriteEnds.get("muSR_WEC").feedSignals(ONE);
 175                         readWriteEnds.get("muSR_WEN").feedSignals(ZERO);
 176                         readWriteEnds.get("muSR_WEOVR").feedSignals(ZERO);
 177                         break;
 178                 case 12:
 179                         readWriteEnds.get("muSR_MUX").feedSignals(ZERO, ZERO);
 180                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 181                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 182                         readWriteEnds.get("muSR_WEZ").feedSignals(ZERO);
 183                         readWriteEnds.get("muSR_WEC").feedSignals(ZERO);
 184                         readWriteEnds.get("muSR_WEN").feedSignals(ONE);
 185                         readWriteEnds.get("muSR_WEOVR").feedSignals(ZERO);
 186                         break;
 187                 case 13:
 188                         readWriteEnds.get("muSR_MUX").feedSignals(ZERO, ONE);
 189                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 190                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 191                         readWriteEnds.get("muSR_WEZ").feedSignals(ZERO);
 192                         readWriteEnds.get("muSR_WEC").feedSignals(ZERO);
 193                         readWriteEnds.get("muSR_WEN").feedSignals(ONE);
 194                         readWriteEnds.get("muSR_WEOVR").feedSignals(ZERO);
 195                         break;
 196                 case 14:
 197                         readWriteEnds.get("muSR_MUX").feedSignals(ZERO, ZERO);
 198                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 199                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 200                         readWriteEnds.get("muSR_WEZ").feedSignals(ZERO);
 201                         readWriteEnds.get("muSR_WEC").feedSignals(ZERO);
 202                         readWriteEnds.get("muSR_WEN").feedSignals(ZERO);
 203                         readWriteEnds.get("muSR_WEOVR").feedSignals(ONE);
 204                         break;
 205                 case 15:
 206                         readWriteEnds.get("muSR_MUX").feedSignals(ZERO, ONE);
 207                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 208                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 209                         readWriteEnds.get("muSR_WEZ").feedSignals(ZERO);
 210                         readWriteEnds.get("muSR_WEC").feedSignals(ZERO);
 211                         readWriteEnds.get("muSR_WEN").feedSignals(ZERO);
 212                         readWriteEnds.get("muSR_WEOVR").feedSignals(ONE);
 213                         break;
 214                 case 24:
 215                 case 25:
 216                 case 40:
 217                 case 41:
 218                 case 56:
 219                 case 57:
 220                         readWriteEnds.get("muSR_MUX").feedSignals(ONE, ONE);
 221                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 222                         readWriteEnds.get("muSR_CINV").feedSignals(ONE);
 223                         readWriteEnds.get("muSR_WEZ").feedSignals(ONE);
 224                         readWriteEnds.get("muSR_WEC").feedSignals(ONE);
 225                         readWriteEnds.get("muSR_WEN").feedSignals(ONE);
 226                         readWriteEnds.get("muSR_WEOVR").feedSignals(ONE);
 227                         break;
 228                 default:
 229                         readWriteEnds.get("muSR_MUX").feedSignals(ONE, ONE);
 230                         readWriteEnds.get("muSR_OVRRET").feedSignals(ZERO);
 231                         readWriteEnds.get("muSR_CINV").feedSignals(ZERO);
 232                         readWriteEnds.get("muSR_WEZ").feedSignals(ONE);
 233                         readWriteEnds.get("muSR_WEC").feedSignals(ONE);
 234                         readWriteEnds.get("muSR_WEN").feedSignals(ONE);
 235                         readWriteEnds.get("muSR_WEOVR").feedSignals(ONE);
 236                 }
 237                 switch (IAsInt)
 238                 {
 239                 case 0:
 240                         readWriteEnds.get("MSR_MUX").feedSignals(ZERO, ONE, ONE);
 241                         break;
 242                 case 1:
 243                         readWriteEnds.get("MSR_MUX").feedSignals(ZERO, ZERO, ONE);
 244                         break;
 245                 case 2:
 246                         readWriteEnds.get("MSR_MUX").feedSignals(ZERO, ONE, ZERO);
 247                         break;
 248                 case 3:
 249                         readWriteEnds.get("MSR_MUX").feedSignals(ZERO, ZERO, ZERO);
 250                         break;
 251                 case 4:
 252                         readWriteEnds.get("MSR_MUX").feedSignals(ONE, ONE, ZERO);
 253                         break;
 254                 case 5:
 255                         readWriteEnds.get("MSR_MUX").feedSignals(ONE, ONE, ONE);
 256                         break;
 257                 case 8:
 258                 case 9:
 259                 case 24:
 260                 case 25:
 261                 case 40:
 262                 case 41:
 263                 case 56:
 264                 case 57:
 265                         readWriteEnds.get("MSR_MUX").feedSignals(ONE, ZERO, ONE);
 266                         break;
 267                 default:
 268                         readWriteEnds.get("MSR_MUX").feedSignals(ONE, ZERO, ZERO);
 269                         break;
 270                 }
 271                 readWriteEnds.get("OEN").feedSignals(I5_0Bits[0].or(I5_0Bits[1]).or(I5_0Bits[2]).or(I5_0Bits[3]).or(I5_0Bits[4]).or(I5_0Bits[5]));
 272                 readWriteEnds.get("Y_MUX").feedSignals(I5_0Bits[0], I5_0Bits[1]);
 273                 readWriteEnds.get("CT_INV").feedSignals(I5_0Bits[5]);
 274                 readWriteEnds.get("CT_MUX").feedSignals(I5_0Bits[2], I5_0Bits[3], I5_0Bits[4]);
 275                 readWriteEnds.get("CT_EXP").feedSignals((IAsInt & 0b111110) == 0b001110 ? ONE : ZERO);
 276                 readWriteEnds.get("C0_MUX").feedSignals(I12_11Bits[0], I12_11Bits[1], I5_0Bits[0],
 277                                 I5_0Bits[2].and(I5_0Bits[3].not()).and(I5_0Bits[4].not()));
 278                 return null;
 279         }
 280
 281         static
 282         {
 283                 IndirectModelComponentCreator.setComponentSupplier(ModelAm2904RegCTInstrDecode.class.getCanonicalName(),
 284                                 (m, p, n) -> new ModelAm2904RegCTInstrDecode(m, n));
 285         }
 286 }