private void WriteAst(HlslAst ast)
{
var compiler = new NodeCompiler(_registers);
var rootGroups = ast.Roots.GroupBy(r => r.Key.RegisterKey);
if (_registers.MethodOutputRegisters.Count == 1)
{
var rootGroup = rootGroups.Single();
var registerKey = rootGroup.Key;
var roots = rootGroup.OrderBy(r => r.Key.ComponentIndex).Select(r => r.Value).ToList();
string statement = compiler.Compile(roots, 4);
WriteLine($"return {statement};");
}
else
{
foreach (var rootGroup in rootGroups)
{
var registerKey = rootGroup.Key;
var roots = rootGroup.OrderBy(r => r.Key.ComponentIndex).Select(r => r.Value).ToList();
RegisterDeclaration outputRegister = _registers.MethodOutputRegisters[registerKey];
string statement = compiler.Compile(roots, roots.Count);
WriteLine($"o.{outputRegister.Name} = {statement};");
}
WriteLine();
WriteLine($"return o;");
}
}
public int GetRegisterFullLength(RegisterKey registerKey)
{
if (registerKey.Type == RegisterType.Const)
{
var constant = FindConstant(ParameterType.Float, registerKey.Number);
return(constant.Columns);
}
RegisterDeclaration decl = _registerDeclarations[registerKey];
switch (decl.TypeName)
{
case "float":
return(1);
case "float2":
return(2);
case "float3":
return(3);
case "float4":
return(4);
default:
throw new InvalidOperationException();
}
}
private void Load(ShaderModel shader)
{
ConstantDeclarations = shader.ParseConstantTable().ConstantDeclarations;
foreach (var constantDeclaration in ConstantDeclarations)
{
RegisterType registerType;
switch (constantDeclaration.RegisterSet)
{
case RegisterSet.Bool:
registerType = RegisterType.ConstBool;
break;
case RegisterSet.Float4:
registerType = RegisterType.Const;
break;
case RegisterSet.Int4:
registerType = RegisterType.ConstInt;
break;
case RegisterSet.Sampler:
registerType = RegisterType.Sampler;
break;
default:
throw new InvalidOperationException();
}
if (registerType == RegisterType.Sampler)
{
// Use declaration from declaration instruction instead
continue;
}
for (int r = 0; r < constantDeclaration.RegisterCount; r++)
{
var registerKey = new RegisterKey(registerType, constantDeclaration.RegisterIndex + r);
var registerDeclaration = new RegisterDeclaration(registerKey);
_registerDeclarations.Add(registerKey, registerDeclaration);
}
}
foreach (var instruction in shader.Tokens.Where(i => i.HasDestination))
{
if (instruction.Opcode == Opcode.Dcl)
{
var registerDeclaration = new RegisterDeclaration(instruction);
RegisterKey registerKey = registerDeclaration.RegisterKey;
_registerDeclarations.Add(registerKey, registerDeclaration);
switch (registerKey.Type)
{
case RegisterType.Input:
case RegisterType.MiscType:
MethodInputRegisters.Add(registerKey, registerDeclaration);
break;
case RegisterType.Output:
case RegisterType.ColorOut:
MethodOutputRegisters.Add(registerKey, registerDeclaration);
break;
case RegisterType.Sampler:
case RegisterType.Addr:
break;
default:
throw new Exception($"Unexpected dcl {registerKey.Type}");
}
}
else if (instruction.Opcode == Opcode.Def)
{
var constant = new Constant(
instruction.GetParamRegisterNumber(0),
instruction.GetParamSingle(1),
instruction.GetParamSingle(2),
instruction.GetParamSingle(3),
instruction.GetParamSingle(4));
_constantDefinitions.Add(constant);
}
else if (instruction.Opcode == Opcode.DefI)
{
var constantInt = new ConstantInt(instruction.GetParamRegisterNumber(0),
instruction.Data[1],
instruction.Data[2],
instruction.Data[3],
instruction.Data[4]);
_constantIntDefinitions.Add(constantInt);
}
else
{
// Find all assignments to color outputs, because pixel shader outputs are not declared.
int destIndex = instruction.GetDestinationParamIndex();
RegisterType registerType = instruction.GetParamRegisterType(destIndex);
int registerNumber = instruction.GetParamRegisterNumber(destIndex);
var registerKey = new RegisterKey(registerType, registerNumber);
if (_registerDeclarations.ContainsKey(registerKey) == false)
{
var reg = new RegisterDeclaration(registerKey);
_registerDeclarations[registerKey] = reg;
if (registerType == RegisterType.ColorOut ||
registerType == RegisterType.RastOut ||
registerType == RegisterType.Output ||
registerType == RegisterType.AttrOut)
{
MethodOutputRegisters[registerKey] = reg;
}
}
}
}
}
void WriteTemps()
{
Dictionary <RegisterKey, int> tempRegisters = new Dictionary <RegisterKey, int>();
foreach (var inst in _shader.Instructions)
{
foreach (var operand in inst.Operands)
{
if (operand is DestinationOperand dest)
{
if (dest.RegisterType == RegisterType.Temp)
{
var registerKey = new RegisterKey(dest.RegisterType, (int)dest.RegisterNumber);
if (!tempRegisters.ContainsKey(registerKey))
{
var reg = new RegisterDeclaration(registerKey);
_registers._registerDeclarations[registerKey] = reg;
tempRegisters[registerKey] = (int)inst.GetDestinationWriteMask();
}
else
{
tempRegisters[registerKey] |= (int)inst.GetDestinationWriteMask();
}
}
}
}
}
if (tempRegisters.Count == 0)
{
return;
}
foreach (IGrouping <int, RegisterKey> group in tempRegisters.GroupBy(
kv => kv.Value,
kv => kv.Key))
{
int writeMask = group.Key;
string writeMaskName; switch (writeMask)
{
case 0x1:
writeMaskName = "float";
break;
case 0x3:
writeMaskName = "float2";
break;
case 0x7:
writeMaskName = "float3";
break;
case 0xF:
writeMaskName = "float4";
break;
default:
// TODO
writeMaskName = "float4";
break;
//throw new NotImplementedException();
}
WriteLine("{0} {1};", writeMaskName, string.Join(", ", group));
}
}