tests/net.mograsim.machine.tests/src/net/mograsim/machine/standard/memory/MainMemoryTest.java

   1 package net.mograsim.machine.standard.memory;
   2
   3 import static org.junit.jupiter.api.Assertions.assertEquals;
   4
   5 import java.math.BigInteger;
   6 import java.util.Random;
   7 import java.util.stream.LongStream;
   8
   9 import org.junit.jupiter.params.ParameterizedTest;
  10 import org.junit.jupiter.params.provider.MethodSource;
  11
  12 import net.mograsim.logic.core.timeline.Timeline;
  13 import net.mograsim.logic.core.types.Bit;
  14 import net.mograsim.logic.core.types.BitVector;
  15 import net.mograsim.logic.core.wires.CoreWire;
  16 import net.mograsim.logic.core.wires.CoreWire.ReadWriteEnd;
  17 import net.mograsim.machine.MainMemory;
  18 import net.mograsim.machine.MainMemoryDefinition;
  19 import net.mograsim.machine.StandardMainMemory;
  20
  21 class MainMemoryTest
  22 {
  23
  24         private Timeline t = new Timeline(10);
  25
  26         @ParameterizedTest(name = "seed = {0}")
  27         @MethodSource("seedsForRandom")
  28         public void wordAddressableMemoryLargeTest(long seed)
  29         {
  30                 CoreWire rW = new CoreWire(t, 1, 2);
  31                 CoreWire data = new CoreWire(t, 16, 2);
  32                 CoreWire address = new CoreWire(t, 64, 2);
  33                 ReadWriteEnd rWI = rW.createReadWriteEnd();
  34                 ReadWriteEnd dataI = data.createReadWriteEnd();
  35                 ReadWriteEnd addressI = address.createReadWriteEnd();
  36
  37                 MainMemoryDefinition definition = MainMemoryDefinition.create(64, 16, 4096L, Long.MAX_VALUE);
  38                 CoreBitVectorMemory<MainMemory> memory = new CoreBitVectorMemory<>(t, 4, definition, data.createReadWriteEnd(),
  39                                 rW.createReadOnlyEnd(), address.createReadOnlyEnd(), false);
  40                 memory.setMemory(new StandardMainMemory(definition));
  41
  42                 Random r = new Random(seed);
  43                 for (long j = 1; j > 0; j *= 2)
  44                 {
  45                         for (int i = 0; i < 100; i++)
  46                         {
  47                                 BitVector bAddress = BitVector.from(4096 + i + j, 64);
  48                                 addressI.feedSignals(bAddress);
  49                                 t.executeAll();
  50                                 BigInteger random = BigInteger.valueOf(Math.abs(r.nextInt()));
  51                                 BitVector vector = BitVector.from(random, 16);
  52                                 dataI.feedSignals(vector);
  53                                 rWI.feedSignals(Bit.ZERO);
  54                                 t.executeAll();
  55                                 rWI.feedSignals(Bit.ONE);
  56                                 t.executeAll();
  57                                 dataI.clearSignals();
  58                                 t.executeAll();
  59
  60                                 assertEquals(vector, dataI.getValues(), "seed=" + seed + ", j=" + j + ", i=" + i);
  61                         }
  62                 }
  63         }
  64
  65         public static LongStream seedsForRandom()
  66         {
  67                 return LongStream.range(0, 20);
  68         }
  69 }