public void Visit(DollarExpr e)
{
result = new FloInt(e.SymbolTable.Here);
}
public void Visit(AtAtAtExpr e)
{
SymbolInfo si = e.SymbolTable.LookupExisting(e.Token);
if (!(si is DatSymbolInfo))
throw new ParseException("Expected DAT symbol", e.Token);
result = new FloInt((si as DatSymbolInfo).Dp + e.SymbolTable.HubAddress);
}
public void Visit(ConverterExpr e)
{
switch (e.Token.Text.ToUpper())
{
case "FLOAT":
result = new FloInt((float)Expr.EvaluateIntConstant(e.Operand, this.insideDat));
break;
case "ROUND":
result = new FloInt((int)(Expr.EvaluateFloatConstant(e.Operand, this.insideDat) + 0.5));
break;
case "TRUNC":
result = new FloInt((int)(Expr.EvaluateFloatConstant(e.Operand, this.insideDat)));
break;
}
}
public void Visit(ConstantExpr e)
{
result = Expr.EvaluateConstant(e, this.insideDat);
}
public void Visit(FloatExpr e)
{
result = new FloInt(e.FloatValue);
}
public void Visit(RegisterExpr e)
{
if (insideDat)
result = new FloInt(e.Reg + 0x1f0);
else
throw new ParseException("Registers not allowed in constant expression", e.Token);
}
public void Visit(IntExpr e)
{
result = new FloInt(e.IntValue);
}
public void Visit(ConExpr e)
{
if (e.ObjectToken == null)
{
ConSymbolInfo csi = e.SymbolTable.LookupExisting(e.Token) as ConSymbolInfo;
if (csi == null)
throw new ParseException("Expected " + e.Token.Text + " to be CON", e.Token);
result = csi.Value;
}
else
{
ObjSymbolInfo osi = e.SymbolTable.LookupExisting(e.ObjectToken) as ObjSymbolInfo;
if (osi == null)
throw new ParseException("Not an object", e.ObjectToken);
GlobalSymbolInfo gsi = GlobalSymbolTable.LookupExisting(osi.FilenameToken);
ConSymbolInfo csi = gsi.SymbolTable.LookupExisting(e.Token) as ConSymbolInfo;
if (csi == null)
throw new ParseException("Expected " + e.Token.Text + " to be CON", e.Token);
result = csi.Value;
}
}
public void Visit(IdExpr e)
{
SymbolInfo symbolInfo = e.SymbolTable.LookupExisting(e.Token);
if (symbolInfo is DatSymbolInfo)
{
if (insideDat)
{
int x = (symbolInfo as DatSymbolInfo).CogAddressX4;
if ((x & 3) != 0)
throw new ParseException("Address is not long", e.Token);
result = new FloInt(x / 4);
return;
}
// else
result = new FloInt((symbolInfo as DatSymbolInfo).Dp);
return;
}
ConSymbolInfo conSymbolInfo = e.SymbolTable.LookupExisting(e.Token) as ConSymbolInfo;
if (conSymbolInfo == null)
throw new ParseException("Non-constant symbol", e.Token);
result = conSymbolInfo.Value;
}
public void Visit(BinaryExpr e)
{
FloInt r1 = Expr.EvaluateConstant(e.Operand1, insideDat);
FloInt r2 = Expr.EvaluateConstant(e.Operand2, insideDat);
if (r1.IsInt)
{
if (!r2.IsInt)
throw new ParseException("Can't mix int and floating-point", e.Token);
int i1 = r1.IntValue;
int i2 = r2.IntValue;
switch (e.Token.Text.ToUpper())
{
case "->": result = new FloInt(Ror(i1, i2)); break;
case "<-": result = new FloInt(Rol(i1, i2)); break;
case ">>": result = new FloInt(Shr(i1, i2)); break;
case "<<": result = new FloInt(i1 << i2); break;
case "~>": result = new FloInt(Sar(i1, i2)); break;
case "><": result = new FloInt(Rev(i1, i2)); break;
case "&": result = new FloInt(i1 & i2); break;
case "|": result = new FloInt(i1 | i2); break;
case "^": result = new FloInt(i1 ^ i2); break;
case "*": result = new FloInt(i1 * i2); break;
case "**": result = new FloInt((int)(((long)i1 * (long)i2) >> 32)); break;
case "/": result = new FloInt(i1 / i2); break;
case "//": result = new FloInt(i1 % i2); break;
case "+": result = new FloInt(i1 + i2); break;
case "-": result = new FloInt(i1 - i2); break;
case "#>": result = new FloInt(i1 > i2 ? i1 : i2); break;
case "<#": result = new FloInt(i1 > i2 ? i2 : i1); break;
case "<": result = new FloInt(i1 < i2 ? -1 : 0); break;
case ">": result = new FloInt(i1 > i2 ? -1 : 0); break;
case "<>": result = new FloInt(i1 != i2 ? -1 : 0); break;
case "==": result = new FloInt(i1 == i2 ? -1 : 0); break;
case "=<": result = new FloInt(i1 <= i2 ? -1 : 0); break;
case "=>": result = new FloInt(i1 >= i2 ? -1 : 0); break;
case "AND": result = new FloInt((i1 != 0) && (i2 != 0) ? -1 : 0); break;
case "OR": result = new FloInt((i1 != 0) || (i2 != 0) ? -1 : 0); break;
default: throw new ParseException("Bad operator in constant expression: " + e.Token.Text, e.Token);
}
}
else // r1 is float
{
if (r2.IsInt)
throw new ParseException("Can't mix int and floating-point", e.Token);
float f1 = r1.FloatValue;
float f2 = r2.FloatValue;
switch (e.Token.Text.ToUpper())
{
case "*": result = new FloInt(f1 * f2); break;
case "/": result = new FloInt(f1 / f2); break;
case "+": result = new FloInt(f1 + f2); break;
case "-": result = new FloInt(f1 - f2); break;
case "#>": result = new FloInt(f1 > f2 ? f1 : f2); break;
case "<#": result = new FloInt(f1 > f2 ? f2 : f1); break;
case "<": result = new FloInt(f1 < f2 ? 1.0f : 0.0f); break;
case ">": result = new FloInt(f1 > f2 ? 1.0f : 0.0f); break;
case "<>": result = new FloInt(f1 != f2 ? 1.0f : 0.0f); break;
case "==": result = new FloInt(f1 == f2 ? 1.0f : 0.0f); break;
case "=<": result = new FloInt(f1 <= f2 ? 1.0f : 0.0f); break;
case "=>": result = new FloInt(f1 >= f2 ? 1.0f : 0.0f); break;
case "AND": result = new FloInt((f1 != 0.0f) && (f2 != 0.0f) ? 1.0f : 0.0f); break;
case "OR": result = new FloInt((f1 != 0.0f) || (f2 != 0.0f) ? 1.0f : 0.0f); break;
default: throw new ParseException("Bad operator in constant expression: " + e.Token.Text, e.Token);
}
}
}
public void Visit(UnaryExpr e)
{
if (e.Token.Text == "@")
{
result = new FloInt(EvaluateAt(e.Operand));
return;
}
result = Expr.EvaluateConstant(e.Operand, insideDat);
if (result.IsInt)
{
switch (e.Token.Text.ToUpper())
{
case "^^": result = new FloInt((int)Math.Sqrt((uint)result.IntValue)); break;
case "||": result = new FloInt(Math.Abs(result.IntValue)); break;
case "|<": result = new FloInt(1 << result.IntValue); break;
case ">|": result = new FloInt(Encode(result.IntValue)); break;
case "!": result = new FloInt(~result.IntValue); break;
case "NOT": result = new FloInt(result.IntValue != 0 ? 0 : -1); break;
case "-": result = new FloInt(-result.IntValue); break;
default: throw new ParseException("Bad operator in constant expression: " + e.Token.Text, e.Token);
}
}
else
{
switch (e.Token.Text.ToUpper())
{
case "^^": result = new FloInt((float)Math.Sqrt(result.FloatValue)); break;
case "||": result = new FloInt(Math.Abs(result.FloatValue)); break;
case "NOT": result = new FloInt(result.FloatValue != 0.0f ? 0.0f : 1.0f); break;
case "-": result = new FloInt(-result.FloatValue); break;
default: throw new ParseException("Bad operator in constant expression: " + e.Token.Text, e.Token);
}
}
}
