/// <summary>
/// Gets a random number generator.
/// </summary>
/// <param name="variant">The opcode variant.</param>
/// <returns>A <see cref="Random"/> object.</returns>
/// <remarks>
/// The seed of the RNG depends on the operands used by the opcode variant,
/// but is constant across uses.
/// </remarks>
Random GetRandom(X86OpcodeVariantSpec variant)
{
string name = string.Join("_", from o in variant.Operands.Cast <X86OperandSpec>()
select GetOperandManualName(o));
return(new Random(name.GetHashCode()));
}
/// <summary>
/// Writes a single test for a specific opcode variant.
/// </summary>
/// <param name="spec">The opcode spec.</param>
/// <param name="variant">The opcode variant.</param>
/// <param name="writer">The text writer to write to.</param>
void WriteTest(X86OpcodeSpec spec, X86OpcodeVariantSpec variant, TextWriter writer)
{
var operandStrings = from o in variant.Operands.Cast <X86OperandSpec>()
select GetOperandStrings(o.Type, o.Size, o.FixedRegister, GetRandom(variant));
string operands = string.Join(", ", from o in operandStrings select o.Item1);
string instruction = spec.Mnemonic.ToUpperInvariant();
if (operandStrings.Any())
{
instruction += " " + string.Join(", ", from o in operandStrings select o.Item2);
}
string feedback16;
byte[] bytes16 = GetEncodedInstruction(DataSize.Bit16, instruction, out feedback16);
string feedback32;
byte[] bytes32 = GetEncodedInstruction(DataSize.Bit32, instruction, out feedback32);
string feedback64;
byte[] bytes64 = GetEncodedInstruction(DataSize.Bit64, instruction, out feedback64);
string methodName = spec.Mnemonic.ToUpperInvariant();
if (variant.Operands.Any())
{
methodName += "_" + string.Join("_", from o in variant.Operands.Cast <X86OperandSpec>()
select IdentifierValidation.Replace(GetOperandManualName(o), ""));
}
writer.WriteLine(T + T + "[Test]");
writer.WriteLine(T + T + "public void {0}()", AsValidIdentifier(methodName));
writer.WriteLine(T + T + "{");
writer.WriteLine(T + T + T + "var instruction = Instr.{0}({1});", AsValidIdentifier(spec.Name), operands);
writer.WriteLine();
writer.WriteLine(T + T + T + "// " + instruction);
if (bytes16 != null)
{
writer.WriteLine(T + T + T + "AssertInstruction(instruction, DataSize.Bit16, new byte[] { " +
string.Join(", ", from b in bytes16 select string.Format("0x{0:X2}", b)) + " });");
}
else
{
writer.WriteLine(T + T + T + "AssertInstructionFail(instruction, DataSize.Bit16);");
}
if (bytes32 != null)
{
writer.WriteLine(T + T + T + "AssertInstruction(instruction, DataSize.Bit32, new byte[] { " +
string.Join(", ", from b in bytes32 select string.Format("0x{0:X2}", b)) + " });");
}
else
{
writer.WriteLine(T + T + T + "AssertInstructionFail(instruction, DataSize.Bit32);");
}
if (bytes64 != null)
{
writer.WriteLine(T + T + T + "AssertInstruction(instruction, DataSize.Bit64, new byte[] { " +
string.Join(", ", from b in bytes64 select string.Format("0x{0:X2}", b)) + " });");
}
else
{
writer.WriteLine(T + T + T + "AssertInstructionFail(instruction, DataSize.Bit64);");
}
if (bytes16 == null && bytes32 == null && bytes64 == null)
{
throw new ScriptException(string.Format("Assembling {0} for the tests failed with the following messages:\n" +
"16-bit: {1}\n32-bit: {2}\n64-bit: {3}",
instruction, ProcessFeedback(feedback16), ProcessFeedback(feedback32), ProcessFeedback(feedback64)));
}
writer.WriteLine(T + T + "}");
}