mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-09-12 02:38:50 +02:00
257 lines
No EOL
7.9 KiB
C#
257 lines
No EOL
7.9 KiB
C#
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
|
|
using System.Collections.Generic;
|
|
using System.Diagnostics;
|
|
using System.Linq;
|
|
|
|
namespace Ryujinx.Graphics.Shader.Translation.Optimizations
|
|
{
|
|
static class Optimizer
|
|
{
|
|
public static void Optimize(BasicBlock[] blocks, ShaderStage stage)
|
|
{
|
|
for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
|
|
{
|
|
GlobalToStorage.RunPass(blocks[blkIndex], stage);
|
|
}
|
|
|
|
bool modified;
|
|
|
|
do
|
|
{
|
|
modified = false;
|
|
|
|
for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
|
|
{
|
|
BasicBlock block = blocks[blkIndex];
|
|
|
|
LinkedListNode<INode> node = block.Operations.First;
|
|
|
|
while (node != null)
|
|
{
|
|
LinkedListNode<INode> nextNode = node.Next;
|
|
|
|
bool isUnused = IsUnused(node.Value);
|
|
|
|
if (!(node.Value is Operation operation) || isUnused)
|
|
{
|
|
if (isUnused)
|
|
{
|
|
RemoveNode(block, node);
|
|
|
|
modified = true;
|
|
}
|
|
|
|
node = nextNode;
|
|
|
|
continue;
|
|
}
|
|
|
|
ConstantFolding.RunPass(operation);
|
|
|
|
Simplification.RunPass(operation);
|
|
|
|
if (DestIsLocalVar(operation))
|
|
{
|
|
if (operation.Inst == Instruction.Copy)
|
|
{
|
|
PropagateCopy(operation);
|
|
|
|
RemoveNode(block, node);
|
|
|
|
modified = true;
|
|
}
|
|
else if ((operation.Inst == Instruction.PackHalf2x16 && PropagatePack(operation)) ||
|
|
(operation.Inst == Instruction.ShuffleXor && MatchDdxOrDdy(operation)))
|
|
{
|
|
if (operation.Dest.UseOps.Count == 0)
|
|
{
|
|
RemoveNode(block, node);
|
|
}
|
|
|
|
modified = true;
|
|
}
|
|
}
|
|
|
|
node = nextNode;
|
|
}
|
|
|
|
if (BranchElimination.RunPass(block))
|
|
{
|
|
RemoveNode(block, block.Operations.Last);
|
|
|
|
modified = true;
|
|
}
|
|
}
|
|
}
|
|
while (modified);
|
|
}
|
|
|
|
private static void PropagateCopy(Operation copyOp)
|
|
{
|
|
// Propagate copy source operand to all uses of
|
|
// the destination operand.
|
|
Operand dest = copyOp.Dest;
|
|
Operand src = copyOp.GetSource(0);
|
|
|
|
INode[] uses = dest.UseOps.ToArray();
|
|
|
|
foreach (INode useNode in uses)
|
|
{
|
|
for (int index = 0; index < useNode.SourcesCount; index++)
|
|
{
|
|
if (useNode.GetSource(index) == dest)
|
|
{
|
|
useNode.SetSource(index, src);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private static bool PropagatePack(Operation packOp)
|
|
{
|
|
// Propagate pack source operands to uses by unpack
|
|
// instruction. The source depends on the unpack instruction.
|
|
bool modified = false;
|
|
|
|
Operand dest = packOp.Dest;
|
|
Operand src0 = packOp.GetSource(0);
|
|
Operand src1 = packOp.GetSource(1);
|
|
|
|
INode[] uses = dest.UseOps.ToArray();
|
|
|
|
foreach (INode useNode in uses)
|
|
{
|
|
if (!(useNode is Operation operation) || operation.Inst != Instruction.UnpackHalf2x16)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (operation.GetSource(0) == dest)
|
|
{
|
|
operation.TurnIntoCopy(operation.ComponentIndex == 1 ? src1 : src0);
|
|
|
|
modified = true;
|
|
}
|
|
}
|
|
|
|
return modified;
|
|
}
|
|
|
|
public static bool MatchDdxOrDdy(Operation operation)
|
|
{
|
|
// It's assumed that "operation.Inst" is ShuffleXor,
|
|
// that should be checked before calling this method.
|
|
Debug.Assert(operation.Inst == Instruction.ShuffleXor);
|
|
|
|
bool modified = false;
|
|
|
|
Operand src2 = operation.GetSource(1);
|
|
Operand src3 = operation.GetSource(2);
|
|
|
|
if (src2.Type != OperandType.Constant || (src2.Value != 1 && src2.Value != 2))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (src3.Type != OperandType.Constant || src3.Value != 0x1c03)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool isDdy = src2.Value == 2;
|
|
bool isDdx = !isDdy;
|
|
|
|
// We can replace any use by a FSWZADD with DDX/DDY, when
|
|
// the following conditions are true:
|
|
// - The mask should be 0b10100101 for DDY, or 0b10011001 for DDX.
|
|
// - The first source operand must be the shuffle output.
|
|
// - The second source operand must be the shuffle first source operand.
|
|
INode[] uses = operation.Dest.UseOps.ToArray();
|
|
|
|
foreach (INode use in uses)
|
|
{
|
|
if (!(use is Operation test))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (!(use is Operation useOp) || useOp.Inst != Instruction.SwizzleAdd)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
Operand fswzaddSrc1 = useOp.GetSource(0);
|
|
Operand fswzaddSrc2 = useOp.GetSource(1);
|
|
Operand fswzaddSrc3 = useOp.GetSource(2);
|
|
|
|
if (fswzaddSrc1 != operation.Dest)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (fswzaddSrc2 != operation.GetSource(0))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (fswzaddSrc3.Type != OperandType.Constant)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
int mask = fswzaddSrc3.Value;
|
|
|
|
if ((isDdx && mask != 0b10011001) ||
|
|
(isDdy && mask != 0b10100101))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
useOp.TurnInto(isDdx ? Instruction.Ddx : Instruction.Ddy, fswzaddSrc2);
|
|
|
|
modified = true;
|
|
}
|
|
|
|
return modified;
|
|
}
|
|
|
|
private static void RemoveNode(BasicBlock block, LinkedListNode<INode> llNode)
|
|
{
|
|
// Remove a node from the nodes list, and also remove itself
|
|
// from all the use lists on the operands that this node uses.
|
|
block.Operations.Remove(llNode);
|
|
|
|
Queue<INode> nodes = new Queue<INode>();
|
|
|
|
nodes.Enqueue(llNode.Value);
|
|
|
|
while (nodes.TryDequeue(out INode node))
|
|
{
|
|
for (int index = 0; index < node.SourcesCount; index++)
|
|
{
|
|
Operand src = node.GetSource(index);
|
|
|
|
if (src.Type != OperandType.LocalVariable)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (src.UseOps.Remove(node) && src.UseOps.Count == 0)
|
|
{
|
|
nodes.Enqueue(src.AsgOp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private static bool IsUnused(INode node)
|
|
{
|
|
return DestIsLocalVar(node) && node.Dest.UseOps.Count == 0;
|
|
}
|
|
|
|
private static bool DestIsLocalVar(INode node)
|
|
{
|
|
return node.Dest != null && node.Dest.Type == OperandType.LocalVariable;
|
|
}
|
|
}
|
|
} |