public void ShouldParseInstructionWithBytePointerSizeOperand()
{
const string mnemonic = "mov";
const string operandRegister = "rax";
string operand1 = $"[{operandRegister}]";
const string pointerType = "BYTE";
const string sourceRegister = "dl";
// mov BYTE [rax], dl
string instructionText = $"{mnemonic} {pointerType} PTR {operand1}, {sourceRegister}";
const int operandCount = 2;
var syntaxTree = IntelX64SyntaxTree.Parse(instructionText);
var root = syntaxTree.Root;
var instruction = root.InstructionStatement;
Assert.Equal(mnemonic, instruction.Token());
Assert.Equal(operandCount, instruction.Operands.Length);
var operand = instruction.Operand1 <BracketedExpressionSyntax>();
Assert.Equal(pointerType, operand.PointerTypeToken());
var pointerExpression = operand.Expression.As <ExpressionStatementSyntax>().Expression;
Assert.Equal(operandRegister, pointerExpression.As <RegisterNameExpressionSyntax>().Token());
Assert.Equal(sourceRegister, instruction.Operand2 <RegisterNameExpressionSyntax>().Token());
}
public void ShouldParseInstructionWithCorrectBinaryPrecedence()
{
const string mnemonic = "mov";
const string operand1Register = "rax";
const string operand2Literal = "2*4+8";
// mov rax, 2*4+8
string instructionText = $"{mnemonic} {operand1Register}, {operand2Literal}";
const int operandCount = 2;
var syntaxTree = IntelX64SyntaxTree.Parse(instructionText);
var root = syntaxTree.Root;
var instruction = root.InstructionStatement;
Assert.Equal(mnemonic, instruction.Token());
Assert.Equal(operandCount, instruction.Operands.Length);
Assert.Equal(operand1Register, instruction.Operand1 <RegisterNameExpressionSyntax>().Token());
var operand2 = instruction.Operand2 <BinaryExpressionSyntax>();
Assert.Equal("+", operand2.OperatorToken.Text);
Assert.Equal(2, operand2.Left.As <BinaryExpressionSyntax>().Left.As <LiteralExpressionSyntax>().Value);
Assert.Equal(4, operand2.Left.As <BinaryExpressionSyntax>().Right.As <LiteralExpressionSyntax>().Value);
Assert.Equal(8, operand2.Right.As <LiteralExpressionSyntax>().Value);
}
public void ShouldParseInstructionWithZeroOperands()
{
const string instructionText = "nop";
var syntaxTree = IntelX64SyntaxTree.Parse(instructionText);
var root = syntaxTree.Root;
var instruction = root.InstructionStatement;
Assert.Equal(instructionText, instruction.Token());
Assert.Empty(instruction.Operands);
}
public void ShouldParseInstructionWithOne32BitOperand()
{
const string mnemonic = "pop";
const string operand1 = "rcx";
// pop rcx
string instructionText = $"{mnemonic} {operand1}";
var syntaxTree = IntelX64SyntaxTree.Parse(instructionText);
var root = syntaxTree.Root;
var instruction = root.InstructionStatement;
Assert.Equal(mnemonic, instruction.Token());
Assert.Single(instruction.Operands);
var operand = instruction.Operand1 <RegisterNameExpressionSyntax>();
Assert.Equal(operand1, operand.Token());
}
public void ShouldAssembleInstructionToBuffer(string inputText, byte[] expectedBytes)
{
var assembler = CreateAssembler(new TestMemory {
Address = 0
});
var instruction = IntelX64SyntaxTree.Parse(inputText).Root.InstructionStatement;
Assert.NotNull(instruction);
using (var builder = new Sequence <byte>())
{
assembler.Emit(builder, instruction, new TestSymbolResolver());
var instructionBuffer = builder.AsReadOnlySequence.ToArray();
Assert.Equal(expectedBytes.Length, instructionBuffer.Length);
Assert.Equal(expectedBytes, instructionBuffer);
}
}
public void ShouldParseInstructionWithLiteralOperand()
{
const string mnemonic = "push";
const string operand1Text = "2";
const int operand1Value = 2;
// push 2
string instructionText = $"{mnemonic} {operand1Text}";
var syntaxTree = IntelX64SyntaxTree.Parse(instructionText);
var root = syntaxTree.Root;
var instruction = root.InstructionStatement;
Assert.Equal(mnemonic, instruction.Token());
Assert.Single(instruction.Operands);
var operand1 = instruction.Operand1 <LiteralExpressionSyntax>();
Assert.Equal(operand1Text, operand1.LiteralToken.Text);
Assert.Equal(operand1Value, operand1.Value);
}
public void ShouldParseInstructionWithQwordPointerSizeOperand()
{
const string mnemonic = "push";
const string operandRegister = "rax";
string operand1 = $"[{operandRegister}]";
const string pointerType = "QWORD";
// push QWORD PTR [rax]
string instructionText = $"{mnemonic} {pointerType} PTR {operand1}";
var syntaxTree = IntelX64SyntaxTree.Parse(instructionText);
var root = syntaxTree.Root;
var instruction = root.InstructionStatement;
Assert.Equal(mnemonic, instruction.Token());
Assert.Single(instruction.Operands);
var operand = instruction.Operand1 <BracketedExpressionSyntax>();
Assert.Equal(pointerType, operand.PointerTypeToken());
Assert.Equal(operandRegister, operand.Expression.StatementAs <RegisterNameExpressionSyntax>().Token());
}
public void ShouldParseInstructionWithRegisterAndLiteralOperands(string operand2Literal, int operand2Value)
{
const string mnemonic = "mov";
const string operand1Register = "rax";
string instructionText = $"{mnemonic} {operand1Register}, {operand2Literal}";
const int operandCount = 2;
var syntaxTree = IntelX64SyntaxTree.Parse(instructionText);
var root = syntaxTree.Root;
var instruction = root.InstructionStatement;
Assert.Equal(mnemonic, instruction.Token());
Assert.Equal(operandCount, instruction.Operands.Length);
Assert.Equal(operand1Register, instruction.Operand1 <RegisterNameExpressionSyntax>().Token());
var operand2 = instruction.Operand2 <LiteralExpressionSyntax>();
Assert.Equal(operand2Literal, operand2.LiteralToken.Text);
Assert.Equal(operand2Value, operand2.Value);
}
public void ShouldParseInstructionBinaryExpressionWithRegisterAndSourceRegister(string expressionOperator)
{
const string mnemonic = "mov";
const string leftRegister = "rax";
const string pointerType = "BYTE";
const int rightImmediateValue = 2;
const string sourceRegister = "dl";
string instructionText = $"{mnemonic} {pointerType} ptr [{leftRegister} {expressionOperator} {rightImmediateValue}], {sourceRegister}";
const int operandCount = 2;
var syntaxTree = IntelX64SyntaxTree.Parse(instructionText);
var root = syntaxTree.Root;
var instruction = root.InstructionStatement;
Assert.Equal(mnemonic, instruction.Token());
Assert.Equal(operandCount, instruction.Operands.Length);
var operand = instruction.Operand1 <BracketedExpressionSyntax>();
Assert.Equal(pointerType, operand.PointerTypeToken());
var pointerExpression = operand.Expression.As <ExpressionStatementSyntax>().Expression;
var binaryExpression = pointerExpression.As <BinaryExpressionSyntax>();
var left = binaryExpression.Left.As <RegisterNameExpressionSyntax>();
Assert.Equal(leftRegister, left.Token());
Assert.Equal(expressionOperator, binaryExpression.OperatorToken.Text);
var right = binaryExpression.Right.As <LiteralExpressionSyntax>();
Assert.Equal(rightImmediateValue, right.Value);
var operand2 = instruction.Operand2 <RegisterNameExpressionSyntax>();
Assert.Equal(sourceRegister, operand2.Token());
}
public void ShouldParseInstructionWithTwoOperands()
{
const string mnemonic = "xor";
const string operand1Text = "rax";
const string operand2Text = "rcx";
// xor rax, rcx
string instructionText = $"{mnemonic} {operand1Text}, {operand2Text}";
const int operandCount = 2;
var syntaxTree = IntelX64SyntaxTree.Parse(instructionText);
var root = syntaxTree.Root;
var instruction = root.InstructionStatement;
Assert.Equal(mnemonic, instruction.Token());
Assert.Equal(operandCount, instruction.Operands.Length);
var operand1 = instruction.Operand1 <RegisterNameExpressionSyntax>();
Assert.Equal(operand1Text, operand1.Token());
var operand2 = instruction.Operand2 <RegisterNameExpressionSyntax>();
Assert.Equal(operand2Text, operand2.Token());
}