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code generations for unary operators

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Clemens-Dautermann 2020-08-21 00:18:21 +02:00
parent 07079366b8
commit e6b20b5aa9
7 changed files with 202 additions and 153 deletions
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32
Compiler/Generator/Generator.cs
View file

@ -32,14 +32,40 @@ namespace Compiler.Generator
$"{functionBody}";
break;
case NodeType.ReturnStatementNode:
s = $"movl ${Generate(rootNode.Children[0])}, %eax \n" +
s = $"{Generate(rootNode.Children[0])}" +
"ret\n";
break;
case NodeType.ExpressionNode:
s = ((ConstantNode) rootNode).value.ToString();
s = Generate(rootNode.Children[0]);
break;
case NodeType.ConstantNode:
s = $"movl ${((ConstantNode) rootNode).value.ToString()}, %eax\n";
break;
case NodeType.UnaryOperatorNode:
switch (((UnaryOperatorNode) rootNode).OperatorType)
{
case OperatorType.Negation:
s = $"{Generate(rootNode.Children[0])}" +
"neg %eax\n";
break;
case OperatorType.BitwiseComplement:
s = $"{Generate(rootNode.Children[0])}" +
"not %eax\n";
break;
case OperatorType.LogicalNegation:
s = $"{Generate(rootNode.Children[0])}" +
"cmpl $0, %eax\n" +
"movl $0, %eax\n" + //xorl %eax, %eax should also work, but doesn't
"sete %al\n";
break;
default:
throw new NotSpecifiedException(NodeType.UnaryOperatorNode,
((UnaryOperatorNode) rootNode).OperatorType);
}
break;
default:
throw new ArgumentOutOfRangeException();
throw new NotSpecifiedException(rootNode.NodeType);
}
return s;

21
Compiler/Generator/NotSpecifiedException.cs Normal file
View file

@ -0,0 +1,21 @@
using System;
using Compiler.Lexer;
using Compiler.Parser.Nodes;
namespace Compiler.Generator
{
public class NotSpecifiedException : Exception
{
public override string Message { get; }
public NotSpecifiedException(NodeType nodeType)
{
Message = $"No code generation for {nodeType} specified.";
}
public NotSpecifiedException(NodeType nodeType, OperatorType operatorType)
{
Message = $"No code generation for {nodeType}:{operatorType} specified.";
}
}
}