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ryujinx-final/Ryujinx.Graphics/Shader/Translation/ControlFlowGraph.cs

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New shader translator implementation (#654) * Start implementing a new shader translator * Fix shift instructions and a typo * Small refactoring on StructuredProgram, move RemovePhis method to a separate class * Initial geometry shader support * Implement TLD4 * Fix -- There's no negation on FMUL32I * Add constant folding and algebraic simplification optimizations, nits * Some leftovers from constant folding * Avoid cast for constant assignments * Add a branch elimination pass, and misc small fixes * Remove redundant branches, add expression propagation and other improvements on the code * Small leftovers -- add missing break and continue, remove unused properties, other improvements * Add null check to handle empty block cases on block visitor * Add HADD2 and HMUL2 half float shader instructions * Optimize pack/unpack sequences, some fixes related to half float instructions * Add TXQ, TLD, TLDS and TLD4S shader texture instructions, and some support for bindless textures, some refactoring on codegen * Fix copy paste mistake that caused RZ to be ignored on the AST instruction * Add workaround for conditional exit, and fix half float instruction with constant buffer * Add missing 0.0 source for TLDS.LZ variants * Simplify the switch for TLDS.LZ * Texture instructions related fixes * Implement the HFMA instruction, and some misc. fixes * Enable constant folding on UnpackHalf2x16 instructions * Refactor HFMA to use OpCode* for opcode decoding rather than on the helper methods * Remove the old shader translator * Remove ShaderDeclInfo and other unused things * Add dual vertex shader support * Add ShaderConfig, used to pass shader type and maximum cbuffer size * Move and rename some instruction enums * Move texture instructions into a separate file * Move operand GetExpression and locals management to OperandManager * Optimize opcode decoding using a simple list and binary search * Add missing condition for do-while on goto elimination * Misc. fixes on texture instructions * Simplify TLDS switch * Address PR feedback, and a nit
2019-04-17 23:57:08 +00:00
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using System.Collections.Generic;
namespace Ryujinx.Graphics.Shader.Translation
{
static class ControlFlowGraph
{
public static BasicBlock[] MakeCfg(Operation[] operations)
{
Dictionary<Operand, BasicBlock> labels = new Dictionary<Operand, BasicBlock>();
List<BasicBlock> blocks = new List<BasicBlock>();
BasicBlock currentBlock = null;
void NextBlock(BasicBlock nextBlock)
{
if (currentBlock != null && !EndsWithUnconditionalInst(currentBlock.GetLastOp()))
{
currentBlock.Next = nextBlock;
}
currentBlock = nextBlock;
}
void NewNextBlock()
{
BasicBlock block = new BasicBlock(blocks.Count);
blocks.Add(block);
NextBlock(block);
}
bool needsNewBlock = true;
for (int index = 0; index < operations.Length; index++)
{
Operation operation = operations[index];
if (operation.Inst == Instruction.MarkLabel)
{
Operand label = operation.Dest;
if (labels.TryGetValue(label, out BasicBlock nextBlock))
{
nextBlock.Index = blocks.Count;
blocks.Add(nextBlock);
NextBlock(nextBlock);
}
else
{
NewNextBlock();
labels.Add(label, currentBlock);
}
}
else
{
if (needsNewBlock)
{
NewNextBlock();
}
currentBlock.Operations.AddLast(operation);
}
needsNewBlock = operation.Inst == Instruction.Branch ||
operation.Inst == Instruction.BranchIfTrue ||
operation.Inst == Instruction.BranchIfFalse;
if (needsNewBlock)
{
Operand label = operation.Dest;
if (!labels.TryGetValue(label, out BasicBlock branchBlock))
{
branchBlock = new BasicBlock();
labels.Add(label, branchBlock);
}
currentBlock.Branch = branchBlock;
}
}
return blocks.ToArray();
}
private static bool EndsWithUnconditionalInst(INode node)
{
if (node is Operation operation)
{
switch (operation.Inst)
{
case Instruction.Branch:
case Instruction.Discard:
case Instruction.Return:
return true;
}
}
return false;
}
}
}