net.mograsim.machine/test/net/mograsim/machine/standard/memory/WordAddressableMemoryTest.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
   8 import org.junit.jupiter.api.Test;
   9
  10 import net.mograsim.logic.core.timeline.Timeline;
  11 import net.mograsim.logic.core.types.Bit;
  12 import net.mograsim.logic.core.types.BitVector;
  13 import net.mograsim.logic.core.wires.Wire;
  14 import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;
  15 import net.mograsim.machine.MainMemoryDefinition;
  16
  17 class WordAddressableMemoryTest {
  18
  19         private Timeline t = new Timeline(10);
  20
  21         @Test
  22         public void wordAddressableMemoryLargeTest()
  23         {
  24                 Wire rW = new Wire(t, 1, 2);
  25                 Wire data = new Wire(t, 16, 2);
  26                 Wire address = new Wire(t, 64, 2);
  27                 ReadWriteEnd rWI = rW.createReadWriteEnd();
  28                 ReadWriteEnd dataI = data.createReadWriteEnd();
  29                 ReadWriteEnd addressI = address.createReadWriteEnd();
  30
  31                 @SuppressWarnings("unused")
  32                 WordAddressableMemoryComponent memory = new WordAddressableMemoryComponent(t, 4, MainMemoryDefinition.create(64, 16, 4096L, Long.MAX_VALUE), data.createReadWriteEnd(),
  33                                 rW.createReadOnlyEnd(), address.createReadOnlyEnd());
  34
  35                 Random r = new Random();
  36                 for (long j = 1; j > 0; j *= 2)
  37                 {
  38                         for (int i = 0; i < 50; i++)
  39                         {
  40                                 String sAddress = String.format("%64s", BigInteger.valueOf(4096 + i + j).toString(2)).replace(' ', '0');
  41                                 sAddress = new StringBuilder(sAddress).reverse().toString();
  42                                 BitVector bAddress = BitVector.parse(sAddress);
  43                                 addressI.feedSignals(bAddress);
  44                                 t.executeAll();
  45                                 String random = BigInteger.valueOf(Math.abs(r.nextInt())).toString(5);
  46                                 random = random.substring(Integer.max(0, random.length() - 16));
  47                                 random = String.format("%16s", random).replace(' ', '0');
  48                                 random = random.replace('2', 'X').replace('3', 'Z').replace('4', 'U');
  49                                 BitVector vector = BitVector.parse(random);
  50                                 dataI.feedSignals(vector);
  51                                 rWI.feedSignals(Bit.ZERO);
  52                                 t.executeAll();
  53                                 rWI.feedSignals(Bit.ONE);
  54                                 t.executeAll();
  55                                 dataI.clearSignals();
  56                                 t.executeAll();
  57
  58                                 assertEquals(dataI.getValues(), vector);
  59                         }
  60                 }
  61         }
  62
  63 }