private static VariableType GetVarTypeFromUses(Operand dest)
{
HashSet <Operand> visited = new HashSet <Operand>();
Queue <Operand> pending = new Queue <Operand>();
bool Enqueue(Operand operand)
{
if (visited.Add(operand))
{
pending.Enqueue(operand);
return(true);
}
return(false);
}
Enqueue(dest);
while (pending.TryDequeue(out Operand operand))
{
foreach (INode useNode in operand.UseOps)
{
if (!(useNode is Operation operation))
{
continue;
}
if (operation.Inst == Instruction.Copy)
{
if (operation.Dest.Type == OperandType.LocalVariable)
{
if (Enqueue(operation.Dest))
{
break;
}
}
else
{
return(OperandInfo.GetVarType(operation.Dest.Type));
}
}
else
{
for (int index = 0; index < operation.SourcesCount; index++)
{
if (operation.GetSource(index) == operand)
{
return(InstructionInfo.GetSrcVarType(operation.Inst, index));
}
}
}
}
}
return(VariableType.S32);
}
private static void AddOperation(StructuredProgramContext context, Operation operation)
{
Instruction inst = operation.Inst;
if (inst == Instruction.LoadAttribute)
{
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
if (src1.Type == OperandType.Constant && src2.Type == OperandType.Constant)
{
int attrOffset = (src1.Value & AttributeConsts.Mask) + (src2.Value << 2);
context.Info.Inputs.Add(attrOffset);
}
}
int sourcesCount = operation.SourcesCount;
int outDestsCount = operation.DestsCount != 0 ? operation.DestsCount - 1 : 0;
IAstNode[] sources = new IAstNode[sourcesCount + outDestsCount];
for (int index = 0; index < operation.SourcesCount; index++)
{
sources[index] = context.GetOperandUse(operation.GetSource(index));
}
for (int index = 0; index < outDestsCount; index++)
{
AstOperand oper = context.GetOperandDef(operation.GetDest(1 + index));
oper.VarType = InstructionInfo.GetSrcVarType(inst, sourcesCount + index);
sources[sourcesCount + index] = oper;
}
AstTextureOperation GetAstTextureOperation(TextureOperation texOp)
{
return(new AstTextureOperation(
inst,
texOp.Type,
texOp.Format,
texOp.Flags,
texOp.CbufSlot,
texOp.Handle,
texOp.Index,
sources));
}
if (operation.Dest != null)
{
AstOperand dest = context.GetOperandDef(operation.Dest);
// If all the sources are bool, it's better to use short-circuiting
// logical operations, rather than forcing a cast to int and doing
// a bitwise operation with the value, as it is likely to be used as
// a bool in the end.
if (IsBitwiseInst(inst) && AreAllSourceTypesEqual(sources, VariableType.Bool))
{
inst = GetLogicalFromBitwiseInst(inst);
}
bool isCondSel = inst == Instruction.ConditionalSelect;
bool isCopy = inst == Instruction.Copy;
if (isCondSel || isCopy)
{
VariableType type = GetVarTypeFromUses(operation.Dest);
if (isCondSel && type == VariableType.F32)
{
inst |= Instruction.FP32;
}
dest.VarType = type;
}
else
{
dest.VarType = InstructionInfo.GetDestVarType(inst);
}
IAstNode source;
if (operation is TextureOperation texOp)
{
if (texOp.Inst == Instruction.ImageLoad)
{
dest.VarType = texOp.Format.GetComponentType();
}
source = GetAstTextureOperation(texOp);
}
else if (!isCopy)
{
source = new AstOperation(inst, operation.Index, sources, operation.SourcesCount);
}
else
{
source = sources[0];
}
context.AddNode(new AstAssignment(dest, source));
}
else if (operation.Inst == Instruction.Comment)
{
context.AddNode(new AstComment(((CommentNode)operation).Comment));
}
else if (operation is TextureOperation texOp)
{
AstTextureOperation astTexOp = GetAstTextureOperation(texOp);
context.AddNode(astTexOp);
}
else
{
context.AddNode(new AstOperation(inst, operation.Index, sources, operation.SourcesCount));
}
// Those instructions needs to be emulated by using helper functions,
// because they are NVIDIA specific. Those flags helps the backend to
// decide which helper functions are needed on the final generated code.
switch (operation.Inst)
{
case Instruction.AtomicMaxS32 | Instruction.MrShared:
case Instruction.AtomicMinS32 | Instruction.MrShared:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.AtomicMinMaxS32Shared;
break;
case Instruction.AtomicMaxS32 | Instruction.MrStorage:
case Instruction.AtomicMinS32 | Instruction.MrStorage:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.AtomicMinMaxS32Storage;
break;
case Instruction.MultiplyHighS32:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.MultiplyHighS32;
break;
case Instruction.MultiplyHighU32:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.MultiplyHighU32;
break;
case Instruction.Shuffle:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.Shuffle;
break;
case Instruction.ShuffleDown:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.ShuffleDown;
break;
case Instruction.ShuffleUp:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.ShuffleUp;
break;
case Instruction.ShuffleXor:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.ShuffleXor;
break;
case Instruction.StoreShared16:
case Instruction.StoreShared8:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.StoreSharedSmallInt;
break;
case Instruction.StoreStorage16:
case Instruction.StoreStorage8:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.StoreStorageSmallInt;
break;
case Instruction.SwizzleAdd:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.SwizzleAdd;
break;
case Instruction.FSIBegin:
case Instruction.FSIEnd:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.FSI;
break;
}
}
private static void AddOperation(StructuredProgramContext context, Operation operation)
{
Instruction inst = operation.Inst;
int sourcesCount = operation.SourcesCount;
int outDestsCount = operation.DestsCount != 0 ? operation.DestsCount - 1 : 0;
IAstNode[] sources = new IAstNode[sourcesCount + outDestsCount];
for (int index = 0; index < operation.SourcesCount; index++)
{
sources[index] = context.GetOperandUse(operation.GetSource(index));
}
for (int index = 0; index < outDestsCount; index++)
{
AstOperand oper = context.GetOperandDef(operation.GetDest(1 + index));
oper.VarType = InstructionInfo.GetSrcVarType(inst, sourcesCount + index);
sources[sourcesCount + index] = oper;
}
AstTextureOperation GetAstTextureOperation(TextureOperation texOp)
{
return(new AstTextureOperation(
inst,
texOp.Type,
texOp.Format,
texOp.Flags,
texOp.CbufSlot,
texOp.Handle,
4, // TODO: Non-hardcoded array size.
texOp.Index,
sources));
}
if (operation.Dest != null)
{
AstOperand dest = context.GetOperandDef(operation.Dest);
if (inst == Instruction.LoadConstant)
{
Operand slot = operation.GetSource(0);
if (slot.Type == OperandType.Constant)
{
context.Info.CBuffers.Add(slot.Value);
}
else
{
// If the value is not constant, then we don't know
// how many constant buffers are used, so we assume
// all of them are used.
int cbCount = 32 - BitOperations.LeadingZeroCount(context.Config.GpuAccessor.QueryConstantBufferUse());
for (int index = 0; index < cbCount; index++)
{
context.Info.CBuffers.Add(index);
}
context.Info.UsesCbIndexing = true;
}
}
else if (UsesStorage(inst))
{
AddSBufferUse(context.Info.SBuffers, operation);
}
// If all the sources are bool, it's better to use short-circuiting
// logical operations, rather than forcing a cast to int and doing
// a bitwise operation with the value, as it is likely to be used as
// a bool in the end.
if (IsBitwiseInst(inst) && AreAllSourceTypesEqual(sources, VariableType.Bool))
{
inst = GetLogicalFromBitwiseInst(inst);
}
bool isCondSel = inst == Instruction.ConditionalSelect;
bool isCopy = inst == Instruction.Copy;
if (isCondSel || isCopy)
{
VariableType type = GetVarTypeFromUses(operation.Dest);
if (isCondSel && type == VariableType.F32)
{
inst |= Instruction.FP32;
}
dest.VarType = type;
}
else
{
dest.VarType = InstructionInfo.GetDestVarType(inst);
}
IAstNode source;
if (operation is TextureOperation texOp)
{
if (texOp.Inst == Instruction.ImageLoad || texOp.Inst == Instruction.ImageStore)
{
dest.VarType = texOp.Format.GetComponentType();
}
AstTextureOperation astTexOp = GetAstTextureOperation(texOp);
if (texOp.Inst == Instruction.ImageLoad)
{
context.Info.Images.Add(astTexOp);
}
else
{
context.Info.Samplers.Add(astTexOp);
}
source = astTexOp;
}
else if (!isCopy)
{
source = new AstOperation(inst, operation.Index, sources, operation.SourcesCount);
}
else
{
source = sources[0];
}
context.AddNode(new AstAssignment(dest, source));
}
else if (operation.Inst == Instruction.Comment)
{
context.AddNode(new AstComment(((CommentNode)operation).Comment));
}
else if (operation is TextureOperation texOp)
{
AstTextureOperation astTexOp = GetAstTextureOperation(texOp);
context.Info.Images.Add(astTexOp);
context.AddNode(astTexOp);
}
else
{
if (UsesStorage(inst))
{
AddSBufferUse(context.Info.SBuffers, operation);
}
context.AddNode(new AstOperation(inst, operation.Index, sources, operation.SourcesCount));
}
// Those instructions needs to be emulated by using helper functions,
// because they are NVIDIA specific. Those flags helps the backend to
// decide which helper functions are needed on the final generated code.
switch (operation.Inst)
{
case Instruction.AtomicMaxS32 | Instruction.MrShared:
case Instruction.AtomicMinS32 | Instruction.MrShared:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.AtomicMinMaxS32Shared;
break;
case Instruction.AtomicMaxS32 | Instruction.MrStorage:
case Instruction.AtomicMinS32 | Instruction.MrStorage:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.AtomicMinMaxS32Storage;
break;
case Instruction.MultiplyHighS32:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.MultiplyHighS32;
break;
case Instruction.MultiplyHighU32:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.MultiplyHighU32;
break;
case Instruction.Shuffle:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.Shuffle;
break;
case Instruction.ShuffleDown:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.ShuffleDown;
break;
case Instruction.ShuffleUp:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.ShuffleUp;
break;
case Instruction.ShuffleXor:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.ShuffleXor;
break;
case Instruction.SwizzleAdd:
context.Info.HelperFunctionsMask |= HelperFunctionsMask.SwizzleAdd;
break;
}
}
