WebUi.java

package org.edumips64.client;

import com.google.gwt.core.client.EntryPoint;

import jsinterop.annotations.JsType;

import org.edumips64.core.*;
import org.edumips64.core.is.HaltException;
import org.edumips64.core.is.InstructionBuilder;
import org.edumips64.utils.ConfigStore;
import org.edumips64.utils.InMemoryConfigStore;
import org.edumips64.utils.io.FileUtils;
import org.edumips64.utils.io.NullFileUtils;

import java.util.logging.Logger;

@JsType(namespace = "jsedumips64")
public class WebUi implements EntryPoint {
  private CPU cpu;
  private Parser parser;
  private SymbolTable symTab;
  private Memory memory;
  private Dinero dinero;

  // Executes the program. Returns an empty string on success, or an error message.
  public String runProgram(String code) {
    Logger logger = Logger.getLogger("simulator");
    logger.info("Running program: " + code);
    try {
      cpu.reset();
      dinero.reset();
      symTab.reset();
      logger.info("About to parse it.");
      parser.doParsing(code);
      logger.info("Parsed. Running.");
      cpu.setStatus(CPU.CPUStatus.RUNNING);
      while (true) {
        cpu.step();
      }
    } catch (HaltException e) {
      logger.info("All done.");
      return "";
    } catch (Exception e) {
      logger.warning("Error: " + e.toString());
      return e.toString();
    }
  }

  public String getMemory() {
    return memory.toString();
  }

  public String getRegisters() {
    return cpu.gprString();
  }

  public String getStatistics() {
    // Ugly, but GWT does not support String.format.
    return cpu.getCycles() + " cycles executed\n" +
        cpu.getInstructions() + " instructions executed\n" +
        cpu.getRAWStalls() + " RAW Stalls\n" +
        cpu.getWAWStalls() + " WAW Stalls\n" +
        cpu.getStructuralStallsDivider() + " structural stalls (divider not available)\n" +
        cpu.getStructuralStallsMemory() + " structural stalls (Memory not available)\n" +
        "Code Size: " + (memory.getInstructionsNumber() * 4) + " Bytes";
  }

  @Override
  public void onModuleLoad() {}

  public void init() {
    // Simulator initialization.
    ConfigStore config = new InMemoryConfigStore(ConfigStore.defaults);
    memory = new Memory();
    symTab = new SymbolTable(memory);
    FileUtils fu = new NullFileUtils();
    IOManager iom = new IOManager(fu, memory);
    cpu = new CPU(memory, config);
    dinero = new Dinero(memory);
    InstructionBuilder instructionBuilder = new InstructionBuilder(memory, iom, cpu, dinero, config);
    parser = new Parser(fu, symTab, memory, instructionBuilder);
  }
}