예제 #1
0
  /* op is either =, %=, &=, *=, /=, +=, -=, ^=, |=, <<=, >>=, or >>>=.
   *
   * expr and var can be null.
   */
  private void atVariableAssign(
      Expr expr, int op, Variable var, Declarator d, ASTree right, boolean doDup)
      throws CompileError {
    int varType = d.getType();
    int varArray = d.getArrayDim();
    String varClass = d.getClassName();
    int varNo = getLocalVar(d);

    if (op != '=') atVariable(var);

    // expr is null if the caller is atDeclarator().
    if (expr == null && right instanceof ArrayInit)
      atArrayVariableAssign((ArrayInit) right, varType, varArray, varClass);
    else atAssignCore(expr, op, right, varType, varArray, varClass);

    if (doDup)
      if (is2word(varType, varArray)) bytecode.addOpcode(DUP2);
      else bytecode.addOpcode(DUP);

    if (varArray > 0) bytecode.addAstore(varNo);
    else if (varType == DOUBLE) bytecode.addDstore(varNo);
    else if (varType == FLOAT) bytecode.addFstore(varNo);
    else if (varType == LONG) bytecode.addLstore(varNo);
    else if (isRefType(varType)) bytecode.addAstore(varNo);
    else bytecode.addIstore(varNo);

    exprType = varType;
    arrayDim = varArray;
    className = varClass;
  }
예제 #2
0
  public void atVariable(Variable v) throws CompileError {
    Declarator d = v.getDeclarator();
    exprType = d.getType();
    arrayDim = d.getArrayDim();
    className = d.getClassName();
    int var = getLocalVar(d);

    if (arrayDim > 0) bytecode.addAload(var);
    else
      switch (exprType) {
        case CLASS:
          bytecode.addAload(var);
          break;
        case LONG:
          bytecode.addLload(var);
          break;
        case FLOAT:
          bytecode.addFload(var);
          break;
        case DOUBLE:
          bytecode.addDload(var);
          break;
        default: // BOOLEAN, BYTE, CHAR, SHORT, INT
          bytecode.addIload(var);
          break;
      }
  }
예제 #3
0
  protected int getLocalVar(Declarator d) {
    int v = d.getLocalVar();
    if (v < 0) {
      v = getMaxLocals(); // delayed variable allocation.
      d.setLocalVar(v);
      incMaxLocals(1);
    }

    return v;
  }
예제 #4
0
  public void atDeclarator(Declarator d) throws CompileError {
    d.setLocalVar(getMaxLocals());
    d.setClassName(resolveClassName(d.getClassName()));

    int size;
    if (is2word(d.getType(), d.getArrayDim())) size = 2;
    else size = 1;

    incMaxLocals(size);

    /*  NOTE: Array initializers has not been supported.
     */
    ASTree init = d.getInitializer();
    if (init != null) {
      doTypeCheck(init);
      atVariableAssign(null, '=', null, d, init, false);
    }
  }
예제 #5
0
  private void atPlusPlus(int token, ASTree oprand, Expr expr, boolean doDup) throws CompileError {
    boolean isPost = oprand == null; // ++i or i++?
    if (isPost) oprand = expr.oprand2();

    if (oprand instanceof Variable) {
      Declarator d = ((Variable) oprand).getDeclarator();
      int t = exprType = d.getType();
      arrayDim = d.getArrayDim();
      int var = getLocalVar(d);
      if (arrayDim > 0) badType(expr);

      if (t == DOUBLE) {
        bytecode.addDload(var);
        if (doDup && isPost) bytecode.addOpcode(DUP2);

        bytecode.addDconst(1.0);
        bytecode.addOpcode(token == PLUSPLUS ? DADD : DSUB);
        if (doDup && !isPost) bytecode.addOpcode(DUP2);

        bytecode.addDstore(var);
      } else if (t == LONG) {
        bytecode.addLload(var);
        if (doDup && isPost) bytecode.addOpcode(DUP2);

        bytecode.addLconst((long) 1);
        bytecode.addOpcode(token == PLUSPLUS ? LADD : LSUB);
        if (doDup && !isPost) bytecode.addOpcode(DUP2);

        bytecode.addLstore(var);
      } else if (t == FLOAT) {
        bytecode.addFload(var);
        if (doDup && isPost) bytecode.addOpcode(DUP);

        bytecode.addFconst(1.0f);
        bytecode.addOpcode(token == PLUSPLUS ? FADD : FSUB);
        if (doDup && !isPost) bytecode.addOpcode(DUP);

        bytecode.addFstore(var);
      } else if (t == BYTE || t == CHAR || t == SHORT || t == INT) {
        if (doDup && isPost) bytecode.addIload(var);

        int delta = token == PLUSPLUS ? 1 : -1;
        if (var > 0xff) {
          bytecode.addOpcode(WIDE);
          bytecode.addOpcode(IINC);
          bytecode.addIndex(var);
          bytecode.addIndex(delta);
        } else {
          bytecode.addOpcode(IINC);
          bytecode.add(var);
          bytecode.add(delta);
        }

        if (doDup && !isPost) bytecode.addIload(var);
      } else badType(expr);
    } else {
      if (oprand instanceof Expr) {
        Expr e = (Expr) oprand;
        if (e.getOperator() == ARRAY) {
          atArrayPlusPlus(token, isPost, e, doDup);
          return;
        }
      }

      atFieldPlusPlus(token, isPost, oprand, expr, doDup);
    }
  }