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|
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using Ryujinx.Graphics.Shader.StructuredIr;
using System.Collections.Generic;
using System.Linq;
using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
namespace Ryujinx.Graphics.Shader.Translation
{
static class Rewriter
{
public static void RunPass(HelperFunctionManager hfm, BasicBlock[] blocks, ShaderConfig config)
{
bool isVertexShader = config.Stage == ShaderStage.Vertex;
bool isImpreciseFragmentShader = config.Stage == ShaderStage.Fragment && config.GpuAccessor.QueryHostReducedPrecision();
bool hasConstantBufferDrawParameters = config.GpuAccessor.QueryHasConstantBufferDrawParameters();
bool hasVectorIndexingBug = config.GpuAccessor.QueryHostHasVectorIndexingBug();
bool supportsSnormBufferTextureFormat = config.GpuAccessor.QueryHostSupportsSnormBufferTextureFormat();
for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
{
BasicBlock block = blocks[blkIndex];
for (LinkedListNode<INode> node = block.Operations.First; node != null; node = node.Next)
{
if (node.Value is not Operation operation)
{
continue;
}
if (isVertexShader)
{
if (hasConstantBufferDrawParameters)
{
if (ReplaceConstantBufferWithDrawParameters(node, operation))
{
config.SetUsedFeature(FeatureFlags.DrawParameters);
}
}
else if (HasConstantBufferDrawParameters(operation))
{
config.SetUsedFeature(FeatureFlags.DrawParameters);
}
}
if (isImpreciseFragmentShader)
{
EnableForcePreciseIfNeeded(operation);
}
if (hasVectorIndexingBug)
{
InsertVectorComponentSelect(node, config);
}
if (operation is TextureOperation texOp)
{
node = InsertTexelFetchScale(hfm, node, config);
node = InsertTextureSizeUnscale(hfm, node, config);
if (texOp.Inst == Instruction.TextureSample)
{
node = InsertCoordNormalization(node, config);
node = InsertCoordGatherBias(node, config);
node = InsertConstOffsets(node, config);
if (texOp.Type == SamplerType.TextureBuffer && !supportsSnormBufferTextureFormat)
{
node = InsertSnormNormalization(node, config);
}
}
}
}
}
}
private static void EnableForcePreciseIfNeeded(Operation operation)
{
// There are some cases where a small bias is added to values to prevent division by zero.
// When operating with reduced precision, it is possible for this bias to get rounded to 0
// and cause a division by zero.
// To prevent that, we force those operations to be precise even if the host wants
// imprecise operations for performance.
if (operation.Inst == (Instruction.FP32 | Instruction.Divide) &&
operation.GetSource(0).Type == OperandType.Constant &&
operation.GetSource(0).AsFloat() == 1f &&
operation.GetSource(1).AsgOp is Operation addOp &&
addOp.Inst == (Instruction.FP32 | Instruction.Add) &&
addOp.GetSource(1).Type == OperandType.Constant)
{
addOp.ForcePrecise = true;
}
}
private static void InsertVectorComponentSelect(LinkedListNode<INode> node, ShaderConfig config)
{
Operation operation = (Operation)node.Value;
if (operation.Inst != Instruction.Load ||
operation.StorageKind != StorageKind.ConstantBuffer ||
operation.SourcesCount < 3)
{
return;
}
Operand bindingIndex = operation.GetSource(0);
Operand fieldIndex = operation.GetSource(1);
Operand elemIndex = operation.GetSource(operation.SourcesCount - 1);
if (bindingIndex.Type != OperandType.Constant ||
fieldIndex.Type != OperandType.Constant ||
elemIndex.Type == OperandType.Constant)
{
return;
}
BufferDefinition buffer = config.Properties.ConstantBuffers[bindingIndex.Value];
StructureField field = buffer.Type.Fields[fieldIndex.Value];
int elemCount = (field.Type & AggregateType.ElementCountMask) switch
{
AggregateType.Vector2 => 2,
AggregateType.Vector3 => 3,
AggregateType.Vector4 => 4,
_ => 1
};
if (elemCount == 1)
{
return;
}
Operand result = null;
for (int i = 0; i < elemCount; i++)
{
Operand value = Local();
Operand[] inputs = new Operand[operation.SourcesCount];
for (int srcIndex = 0; srcIndex < inputs.Length - 1; srcIndex++)
{
inputs[srcIndex] = operation.GetSource(srcIndex);
}
inputs[inputs.Length - 1] = Const(i);
Operation loadOp = new Operation(Instruction.Load, StorageKind.ConstantBuffer, value, inputs);
node.List.AddBefore(node, loadOp);
if (i == 0)
{
result = value;
}
else
{
Operand isCurrentIndex = Local();
Operand selection = Local();
Operation compareOp = new Operation(Instruction.CompareEqual, isCurrentIndex, new Operand[] { elemIndex, Const(i) });
Operation selectOp = new Operation(Instruction.ConditionalSelect, selection, new Operand[] { isCurrentIndex, value, result });
node.List.AddBefore(node, compareOp);
node.List.AddBefore(node, selectOp);
result = selection;
}
}
operation.TurnIntoCopy(result);
}
private static LinkedListNode<INode> InsertTexelFetchScale(HelperFunctionManager hfm, LinkedListNode<INode> node, ShaderConfig config)
{
TextureOperation texOp = (TextureOperation)node.Value;
bool isBindless = (texOp.Flags & TextureFlags.Bindless) != 0;
bool intCoords = (texOp.Flags & TextureFlags.IntCoords) != 0;
bool isArray = (texOp.Type & SamplerType.Array) != 0;
bool isIndexed = (texOp.Type & SamplerType.Indexed) != 0;
int coordsCount = texOp.Type.GetDimensions();
int coordsIndex = isBindless || isIndexed ? 1 : 0;
bool isImage = IsImageInstructionWithScale(texOp.Inst);
if ((texOp.Inst == Instruction.TextureSample || isImage) &&
(intCoords || isImage) &&
!isBindless &&
!isIndexed &&
config.Stage.SupportsRenderScale() &&
TypeSupportsScale(texOp.Type))
{
int functionId = hfm.GetOrCreateFunctionId(HelperFunctionName.TexelFetchScale);
int samplerIndex = isImage
? config.GetTextureDescriptors().Length + config.FindImageDescriptorIndex(texOp)
: config.FindTextureDescriptorIndex(texOp);
for (int index = 0; index < coordsCount; index++)
{
Operand scaledCoord = Local();
Operand[] callArgs;
if (config.Stage == ShaderStage.Fragment)
{
callArgs = new Operand[] { Const(functionId), texOp.GetSource(coordsIndex + index), Const(samplerIndex), Const(index) };
}
else
{
callArgs = new Operand[] { Const(functionId), texOp.GetSource(coordsIndex + index), Const(samplerIndex) };
}
node.List.AddBefore(node, new Operation(Instruction.Call, 0, scaledCoord, callArgs));
texOp.SetSource(coordsIndex + index, scaledCoord);
}
}
return node;
}
private static LinkedListNode<INode> InsertTextureSizeUnscale(HelperFunctionManager hfm, LinkedListNode<INode> node, ShaderConfig config)
{
TextureOperation texOp = (TextureOperation)node.Value;
bool isBindless = (texOp.Flags & TextureFlags.Bindless) != 0;
bool intCoords = (texOp.Flags & TextureFlags.IntCoords) != 0;
bool isArray = (texOp.Type & SamplerType.Array) != 0;
bool isIndexed = (texOp.Type & SamplerType.Indexed) != 0;
if (texOp.Inst == Instruction.TextureSize &&
texOp.Index < 2 &&
!isBindless &&
!isIndexed &&
config.Stage.SupportsRenderScale() &&
TypeSupportsScale(texOp.Type))
{
int functionId = hfm.GetOrCreateFunctionId(HelperFunctionName.TextureSizeUnscale);
int samplerIndex = config.FindTextureDescriptorIndex(texOp, ignoreType: true);
for (int index = texOp.DestsCount - 1; index >= 0; index--)
{
Operand dest = texOp.GetDest(index);
Operand unscaledSize = Local();
// Replace all uses with the unscaled size value.
// This must be done before the call is added, since it also is a use of the original size.
foreach (INode useOp in dest.UseOps)
{
for (int srcIndex = 0; srcIndex < useOp.SourcesCount; srcIndex++)
{
if (useOp.GetSource(srcIndex) == dest)
{
useOp.SetSource(srcIndex, unscaledSize);
}
}
}
Operand[] callArgs = new Operand[] { Const(functionId), dest, Const(samplerIndex) };
node.List.AddAfter(node, new Operation(Instruction.Call, 0, unscaledSize, callArgs));
}
}
return node;
}
private static bool IsImageInstructionWithScale(Instruction inst)
{
// Currently, we don't support scaling images that are modified,
// so we only need to care about the load instruction.
return inst == Instruction.ImageLoad;
}
private static bool TypeSupportsScale(SamplerType type)
{
return (type & SamplerType.Mask) == SamplerType.Texture2D;
}
private static LinkedListNode<INode> InsertCoordNormalization(LinkedListNode<INode> node, ShaderConfig config)
{
// Emulate non-normalized coordinates by normalizing the coordinates on the shader.
// Without normalization, the coordinates are expected to the in the [0, W or H] range,
// and otherwise, it is expected to be in the [0, 1] range.
// We normalize by dividing the coords by the texture size.
TextureOperation texOp = (TextureOperation)node.Value;
bool isBindless = (texOp.Flags & TextureFlags.Bindless) != 0;
bool intCoords = (texOp.Flags & TextureFlags.IntCoords) != 0;
bool isCoordNormalized = isBindless || config.GpuAccessor.QueryTextureCoordNormalized(texOp.Handle, texOp.CbufSlot);
if (isCoordNormalized || intCoords)
{
return node;
}
bool isArray = (texOp.Type & SamplerType.Array) != 0;
bool isIndexed = (texOp.Type & SamplerType.Indexed) != 0;
int coordsCount = texOp.Type.GetDimensions();
int coordsIndex = isBindless || isIndexed ? 1 : 0;
config.SetUsedFeature(FeatureFlags.IntegerSampling);
int normCoordsCount = (texOp.Type & SamplerType.Mask) == SamplerType.TextureCube ? 2 : coordsCount;
for (int index = 0; index < normCoordsCount; index++)
{
Operand coordSize = Local();
Operand[] texSizeSources;
if (isBindless || isIndexed)
{
texSizeSources = new Operand[] { texOp.GetSource(0), Const(0) };
}
else
{
texSizeSources = new Operand[] { Const(0) };
}
node.List.AddBefore(node, new TextureOperation(
Instruction.TextureSize,
texOp.Type,
texOp.Format,
texOp.Flags,
texOp.CbufSlot,
texOp.Handle,
index,
new[] { coordSize },
texSizeSources));
config.SetUsedTexture(Instruction.TextureSize, texOp.Type, texOp.Format, texOp.Flags, texOp.CbufSlot, texOp.Handle);
Operand source = texOp.GetSource(coordsIndex + index);
Operand coordNormalized = Local();
node.List.AddBefore(node, new Operation(Instruction.FP32 | Instruction.Divide, coordNormalized, source, GenerateI2f(node, coordSize)));
texOp.SetSource(coordsIndex + index, coordNormalized);
}
return node;
}
private static LinkedListNode<INode> InsertCoordGatherBias(LinkedListNode<INode> node, ShaderConfig config)
{
// The gather behavior when the coordinate sits right in the middle of two texels is not well defined.
// To ensure the correct texel is sampled, we add a small bias value to the coordinate.
// This value is calculated as the minimum value required to change the texel it will sample from,
// and is 0 if the host does not require the bias.
TextureOperation texOp = (TextureOperation)node.Value;
bool isBindless = (texOp.Flags & TextureFlags.Bindless) != 0;
bool isGather = (texOp.Flags & TextureFlags.Gather) != 0;
int gatherBiasPrecision = config.GpuAccessor.QueryHostGatherBiasPrecision();
if (!isGather || gatherBiasPrecision == 0)
{
return node;
}
bool intCoords = (texOp.Flags & TextureFlags.IntCoords) != 0;
bool isArray = (texOp.Type & SamplerType.Array) != 0;
bool isIndexed = (texOp.Type & SamplerType.Indexed) != 0;
int coordsCount = texOp.Type.GetDimensions();
int coordsIndex = isBindless || isIndexed ? 1 : 0;
config.SetUsedFeature(FeatureFlags.IntegerSampling);
int normCoordsCount = (texOp.Type & SamplerType.Mask) == SamplerType.TextureCube ? 2 : coordsCount;
for (int index = 0; index < normCoordsCount; index++)
{
Operand coordSize = Local();
Operand scaledSize = Local();
Operand bias = Local();
Operand[] texSizeSources;
if (isBindless || isIndexed)
{
texSizeSources = new Operand[] { texOp.GetSource(0), Const(0) };
}
else
{
texSizeSources = new Operand[] { Const(0) };
}
node.List.AddBefore(node, new TextureOperation(
Instruction.TextureSize,
texOp.Type,
texOp.Format,
texOp.Flags,
texOp.CbufSlot,
texOp.Handle,
index,
new[] { coordSize },
texSizeSources));
config.SetUsedTexture(Instruction.TextureSize, texOp.Type, texOp.Format, texOp.Flags, texOp.CbufSlot, texOp.Handle);
node.List.AddBefore(node, new Operation(
Instruction.FP32 | Instruction.Multiply,
scaledSize,
GenerateI2f(node, coordSize),
ConstF((float)(1 << (gatherBiasPrecision + 1)))));
node.List.AddBefore(node, new Operation(Instruction.FP32 | Instruction.Divide, bias, ConstF(1f), scaledSize));
Operand source = texOp.GetSource(coordsIndex + index);
Operand coordBiased = Local();
node.List.AddBefore(node, new Operation(Instruction.FP32 | Instruction.Add, coordBiased, source, bias));
texOp.SetSource(coordsIndex + index, coordBiased);
}
return node;
}
private static LinkedListNode<INode> InsertConstOffsets(LinkedListNode<INode> node, ShaderConfig config)
{
// Non-constant texture offsets are not allowed (according to the spec),
// however some GPUs does support that.
// For GPUs where it is not supported, we can replace the instruction with the following:
// For texture*Offset, we replace it by texture*, and add the offset to the P coords.
// The offset can be calculated as offset / textureSize(lod), where lod = textureQueryLod(coords).
// For texelFetchOffset, we replace it by texelFetch and add the offset to the P coords directly.
// For textureGatherOffset, we split the operation into up to 4 operations, one for each component
// that is accessed, where each textureGather operation has a different offset for each pixel.
TextureOperation texOp = (TextureOperation)node.Value;
bool hasOffset = (texOp.Flags & TextureFlags.Offset) != 0;
bool hasOffsets = (texOp.Flags & TextureFlags.Offsets) != 0;
bool hasInvalidOffset = (hasOffset || hasOffsets) && !config.GpuAccessor.QueryHostSupportsNonConstantTextureOffset();
bool isBindless = (texOp.Flags & TextureFlags.Bindless) != 0;
if (!hasInvalidOffset)
{
return node;
}
bool isGather = (texOp.Flags & TextureFlags.Gather) != 0;
bool hasDerivatives = (texOp.Flags & TextureFlags.Derivatives) != 0;
bool intCoords = (texOp.Flags & TextureFlags.IntCoords) != 0;
bool hasLodBias = (texOp.Flags & TextureFlags.LodBias) != 0;
bool hasLodLevel = (texOp.Flags & TextureFlags.LodLevel) != 0;
bool isArray = (texOp.Type & SamplerType.Array) != 0;
bool isIndexed = (texOp.Type & SamplerType.Indexed) != 0;
bool isMultisample = (texOp.Type & SamplerType.Multisample) != 0;
bool isShadow = (texOp.Type & SamplerType.Shadow) != 0;
int coordsCount = texOp.Type.GetDimensions();
int offsetsCount;
if (hasOffsets)
{
offsetsCount = coordsCount * 4;
}
else if (hasOffset)
{
offsetsCount = coordsCount;
}
else
{
offsetsCount = 0;
}
Operand[] offsets = new Operand[offsetsCount];
Operand[] sources = new Operand[texOp.SourcesCount - offsetsCount];
int copyCount = 0;
if (isBindless || isIndexed)
{
copyCount++;
}
Operand[] lodSources = new Operand[copyCount + coordsCount];
for (int index = 0; index < lodSources.Length; index++)
{
lodSources[index] = texOp.GetSource(index);
}
copyCount += coordsCount;
if (isArray)
{
copyCount++;
}
if (isShadow)
{
copyCount++;
}
if (hasDerivatives)
{
copyCount += coordsCount * 2;
}
if (isMultisample)
{
copyCount++;
}
else if (hasLodLevel)
{
copyCount++;
}
int srcIndex = 0;
int dstIndex = 0;
for (int index = 0; index < copyCount; index++)
{
sources[dstIndex++] = texOp.GetSource(srcIndex++);
}
bool areAllOffsetsConstant = true;
for (int index = 0; index < offsetsCount; index++)
{
Operand offset = texOp.GetSource(srcIndex++);
areAllOffsetsConstant &= offset.Type == OperandType.Constant;
offsets[index] = offset;
}
hasInvalidOffset &= !areAllOffsetsConstant;
if (!hasInvalidOffset)
{
return node;
}
if (hasLodBias)
{
sources[dstIndex++] = texOp.GetSource(srcIndex++);
}
if (isGather && !isShadow)
{
sources[dstIndex++] = texOp.GetSource(srcIndex++);
}
int coordsIndex = isBindless || isIndexed ? 1 : 0;
int componentIndex = texOp.Index;
Operand[] dests = new Operand[texOp.DestsCount];
for (int i = 0; i < texOp.DestsCount; i++)
{
dests[i] = texOp.GetDest(i);
}
Operand bindlessHandle = isBindless || isIndexed ? sources[0] : null;
LinkedListNode<INode> oldNode = node;
if (isGather && !isShadow)
{
config.SetUsedFeature(FeatureFlags.IntegerSampling);
Operand[] newSources = new Operand[sources.Length];
sources.CopyTo(newSources, 0);
Operand[] texSizes = InsertTextureLod(node, texOp, lodSources, bindlessHandle, coordsCount);
int destIndex = 0;
for (int compIndex = 0; compIndex < 4; compIndex++)
{
if (((texOp.Index >> compIndex) & 1) == 0)
{
continue;
}
for (int index = 0; index < coordsCount; index++)
{
config.SetUsedTexture(Instruction.TextureSize, texOp.Type, texOp.Format, texOp.Flags, texOp.CbufSlot, texOp.Handle);
Operand offset = Local();
Operand intOffset = offsets[index + (hasOffsets ? compIndex * coordsCount : 0)];
node.List.AddBefore(node, new Operation(
Instruction.FP32 | Instruction.Divide,
offset,
GenerateI2f(node, intOffset),
GenerateI2f(node, texSizes[index])));
Operand source = sources[coordsIndex + index];
Operand coordPlusOffset = Local();
node.List.AddBefore(node, new Operation(Instruction.FP32 | Instruction.Add, coordPlusOffset, source, offset));
newSources[coordsIndex + index] = coordPlusOffset;
}
TextureOperation newTexOp = new TextureOperation(
Instruction.TextureSample,
texOp.Type,
texOp.Format,
texOp.Flags & ~(TextureFlags.Offset | TextureFlags.Offsets),
texOp.CbufSlot,
texOp.Handle,
1,
new[] { dests[destIndex++] },
newSources);
node = node.List.AddBefore(node, newTexOp);
}
}
else
{
if (intCoords)
{
for (int index = 0; index < coordsCount; index++)
{
Operand source = sources[coordsIndex + index];
Operand coordPlusOffset = Local();
node.List.AddBefore(node, new Operation(Instruction.Add, coordPlusOffset, source, offsets[index]));
sources[coordsIndex + index] = coordPlusOffset;
}
}
else
{
config.SetUsedFeature(FeatureFlags.IntegerSampling);
Operand[] texSizes = InsertTextureLod(node, texOp, lodSources, bindlessHandle, coordsCount);
for (int index = 0; index < coordsCount; index++)
{
config.SetUsedTexture(Instruction.TextureSize, texOp.Type, texOp.Format, texOp.Flags, texOp.CbufSlot, texOp.Handle);
Operand offset = Local();
Operand intOffset = offsets[index];
node.List.AddBefore(node, new Operation(
Instruction.FP32 | Instruction.Divide,
offset,
GenerateI2f(node, intOffset),
GenerateI2f(node, texSizes[index])));
Operand source = sources[coordsIndex + index];
Operand coordPlusOffset = Local();
node.List.AddBefore(node, new Operation(Instruction.FP32 | Instruction.Add, coordPlusOffset, source, offset));
sources[coordsIndex + index] = coordPlusOffset;
}
}
TextureOperation newTexOp = new TextureOperation(
Instruction.TextureSample,
texOp.Type,
texOp.Format,
texOp.Flags & ~(TextureFlags.Offset | TextureFlags.Offsets),
texOp.CbufSlot,
texOp.Handle,
componentIndex,
dests,
sources);
node = node.List.AddBefore(node, newTexOp);
}
node.List.Remove(oldNode);
for (int index = 0; index < texOp.SourcesCount; index++)
{
texOp.SetSource(index, null);
}
return node;
}
private static Operand[] InsertTextureLod(
LinkedListNode<INode> node,
TextureOperation texOp,
Operand[] lodSources,
Operand bindlessHandle,
int coordsCount)
{
Operand[] texSizes = new Operand[coordsCount];
Operand lod = Local();
node.List.AddBefore(node, new TextureOperation(
Instruction.Lod,
texOp.Type,
texOp.Format,
texOp.Flags,
texOp.CbufSlot,
texOp.Handle,
0,
new[] { lod },
lodSources));
for (int index = 0; index < coordsCount; index++)
{
texSizes[index] = Local();
Operand[] texSizeSources;
if (bindlessHandle != null)
{
texSizeSources = new Operand[] { bindlessHandle, GenerateF2i(node, lod) };
}
else
{
texSizeSources = new Operand[] { GenerateF2i(node, lod) };
}
node.List.AddBefore(node, new TextureOperation(
Instruction.TextureSize,
texOp.Type,
texOp.Format,
texOp.Flags,
texOp.CbufSlot,
texOp.Handle,
index,
new[] { texSizes[index] },
texSizeSources));
}
return texSizes;
}
private static LinkedListNode<INode> InsertSnormNormalization(LinkedListNode<INode> node, ShaderConfig config)
{
TextureOperation texOp = (TextureOperation)node.Value;
// We can't query the format of a bindless texture,
// because the handle is unknown, it can have any format.
if (texOp.Flags.HasFlag(TextureFlags.Bindless))
{
return node;
}
TextureFormat format = config.GpuAccessor.QueryTextureFormat(texOp.Handle, texOp.CbufSlot);
int maxPositive = format switch
{
TextureFormat.R8Snorm => sbyte.MaxValue,
TextureFormat.R8G8Snorm => sbyte.MaxValue,
TextureFormat.R8G8B8A8Snorm => sbyte.MaxValue,
TextureFormat.R16Snorm => short.MaxValue,
TextureFormat.R16G16Snorm => short.MaxValue,
TextureFormat.R16G16B16A16Snorm => short.MaxValue,
_ => 0
};
// The value being 0 means that the format is not a SNORM format,
// so there's nothing to do here.
if (maxPositive == 0)
{
return node;
}
// Do normalization. We assume SINT formats are being used
// as replacement for SNORM (which is not supported).
for (int i = 0; i < texOp.DestsCount; i++)
{
Operand dest = texOp.GetDest(i);
INode[] uses = dest.UseOps.ToArray();
Operation convOp = new Operation(Instruction.ConvertS32ToFP32, Local(), dest);
Operation normOp = new Operation(Instruction.FP32 | Instruction.Multiply, Local(), convOp.Dest, ConstF(1f / maxPositive));
node = node.List.AddAfter(node, convOp);
node = node.List.AddAfter(node, normOp);
foreach (INode useOp in uses)
{
if (useOp is not Operation op)
{
continue;
}
// Replace all uses of the texture pixel value with the normalized value.
for (int index = 0; index < op.SourcesCount; index++)
{
if (op.GetSource(index) == dest)
{
op.SetSource(index, normOp.Dest);
}
}
}
}
return node;
}
private static Operand GenerateI2f(LinkedListNode<INode> node, Operand value)
{
Operand res = Local();
node.List.AddBefore(node, new Operation(Instruction.ConvertS32ToFP32, res, value));
return res;
}
private static Operand GenerateF2i(LinkedListNode<INode> node, Operand value)
{
Operand res = Local();
node.List.AddBefore(node, new Operation(Instruction.ConvertFP32ToS32, res, value));
return res;
}
private static bool ReplaceConstantBufferWithDrawParameters(LinkedListNode<INode> node, Operation operation)
{
Operand GenerateLoad(IoVariable ioVariable)
{
Operand value = Local();
node.List.AddBefore(node, new Operation(Instruction.Load, StorageKind.Input, value, Const((int)ioVariable)));
return value;
}
bool modified = false;
for (int srcIndex = 0; srcIndex < operation.SourcesCount; srcIndex++)
{
Operand src = operation.GetSource(srcIndex);
if (src.Type == OperandType.ConstantBuffer && src.GetCbufSlot() == 0)
{
switch (src.GetCbufOffset())
{
case Constants.NvnBaseVertexByteOffset / 4:
operation.SetSource(srcIndex, GenerateLoad(IoVariable.BaseVertex));
modified = true;
break;
case Constants.NvnBaseInstanceByteOffset / 4:
operation.SetSource(srcIndex, GenerateLoad(IoVariable.BaseInstance));
modified = true;
break;
case Constants.NvnDrawIndexByteOffset / 4:
operation.SetSource(srcIndex, GenerateLoad(IoVariable.DrawIndex));
modified = true;
break;
}
}
}
return modified;
}
private static bool HasConstantBufferDrawParameters(Operation operation)
{
for (int srcIndex = 0; srcIndex < operation.SourcesCount; srcIndex++)
{
Operand src = operation.GetSource(srcIndex);
if (src.Type == OperandType.ConstantBuffer && src.GetCbufSlot() == 0)
{
switch (src.GetCbufOffset())
{
case Constants.NvnBaseVertexByteOffset / 4:
case Constants.NvnBaseInstanceByteOffset / 4:
case Constants.NvnDrawIndexByteOffset / 4:
return true;
}
}
}
return false;
}
}
}
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