367 lines
12 KiB
C#
367 lines
12 KiB
C#
using Ryujinx.Graphics.Shader.CodeGen.Glsl;
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using Ryujinx.Graphics.Shader.Decoders;
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using Ryujinx.Graphics.Shader.IntermediateRepresentation;
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using Ryujinx.Graphics.Shader.StructuredIr;
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using Ryujinx.Graphics.Shader.Translation.Optimizations;
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using System;
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using System.Collections.Generic;
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using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
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namespace Ryujinx.Graphics.Shader.Translation
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{
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public static class Translator
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{
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private const int HeaderSize = 0x50;
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private struct FunctionCode
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{
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public Operation[] Code { get; }
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public FunctionCode(Operation[] code)
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{
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Code = code;
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}
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}
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public static ShaderProgram Translate(
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ulong address,
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IGpuAccessor gpuAccessor,
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TranslationFlags flags,
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TranslationCounts counts = null)
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{
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counts ??= new TranslationCounts();
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return Translate(DecodeShader(address, gpuAccessor, flags, counts, out ShaderConfig config), config);
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}
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public static ShaderProgram Translate(
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ulong addressA,
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ulong addressB,
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IGpuAccessor gpuAccessor,
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TranslationFlags flags,
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TranslationCounts counts = null)
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{
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counts ??= new TranslationCounts();
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FunctionCode[] funcA = DecodeShader(addressA, gpuAccessor, flags | TranslationFlags.VertexA, counts, out ShaderConfig configA);
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FunctionCode[] funcB = DecodeShader(addressB, gpuAccessor, flags, counts, out ShaderConfig config);
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config.SetUsedFeature(configA.UsedFeatures);
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return Translate(Combine(funcA, funcB), config, configA.Size);
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}
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private static ShaderProgram Translate(FunctionCode[] functions, ShaderConfig config, int sizeA = 0)
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{
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var cfgs = new ControlFlowGraph[functions.Length];
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var frus = new RegisterUsage.FunctionRegisterUsage[functions.Length];
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for (int i = 0; i < functions.Length; i++)
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{
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cfgs[i] = ControlFlowGraph.Create(functions[i].Code);
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if (i != 0)
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{
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frus[i] = RegisterUsage.RunPass(cfgs[i]);
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}
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}
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Function[] funcs = new Function[functions.Length];
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for (int i = 0; i < functions.Length; i++)
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{
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var cfg = cfgs[i];
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int inArgumentsCount = 0;
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int outArgumentsCount = 0;
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if (i != 0)
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{
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var fru = frus[i];
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inArgumentsCount = fru.InArguments.Length;
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outArgumentsCount = fru.OutArguments.Length;
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}
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if (cfg.Blocks.Length != 0)
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{
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RegisterUsage.FixupCalls(cfg.Blocks, frus);
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Dominance.FindDominators(cfg);
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Dominance.FindDominanceFrontiers(cfg.Blocks);
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Ssa.Rename(cfg.Blocks);
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Optimizer.RunPass(cfg.Blocks, config);
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Lowering.RunPass(cfg.Blocks, config);
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}
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funcs[i] = new Function(cfg.Blocks, $"fun{i}", false, inArgumentsCount, outArgumentsCount);
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}
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StructuredProgramInfo sInfo = StructuredProgram.MakeStructuredProgram(funcs, config);
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GlslProgram program = GlslGenerator.Generate(sInfo, config);
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ShaderProgramInfo spInfo = new ShaderProgramInfo(
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program.CBufferDescriptors,
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program.SBufferDescriptors,
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program.TextureDescriptors,
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program.ImageDescriptors,
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sInfo.UsesInstanceId);
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string glslCode = program.Code;
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return new ShaderProgram(spInfo, config.Stage, glslCode, config.Size, sizeA);
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}
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private static FunctionCode[] DecodeShader(
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ulong address,
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IGpuAccessor gpuAccessor,
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TranslationFlags flags,
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TranslationCounts counts,
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out ShaderConfig config)
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{
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Block[][] cfg;
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if ((flags & TranslationFlags.Compute) != 0)
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{
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config = new ShaderConfig(gpuAccessor, flags, counts);
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cfg = Decoder.Decode(gpuAccessor, address);
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}
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else
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{
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config = new ShaderConfig(new ShaderHeader(gpuAccessor, address), gpuAccessor, flags, counts);
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cfg = Decoder.Decode(gpuAccessor, address + HeaderSize);
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}
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if (cfg == null)
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{
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gpuAccessor.Log("Invalid branch detected, failed to build CFG.");
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return Array.Empty<FunctionCode>();
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}
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Dictionary<ulong, int> funcIds = new Dictionary<ulong, int>();
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for (int funcIndex = 0; funcIndex < cfg.Length; funcIndex++)
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{
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funcIds.Add(cfg[funcIndex][0].Address, funcIndex);
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}
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List<FunctionCode> funcs = new List<FunctionCode>();
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ulong maxEndAddress = 0;
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for (int funcIndex = 0; funcIndex < cfg.Length; funcIndex++)
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{
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EmitterContext context = new EmitterContext(config, funcIndex != 0, funcIds);
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for (int blkIndex = 0; blkIndex < cfg[funcIndex].Length; blkIndex++)
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{
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Block block = cfg[funcIndex][blkIndex];
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if (maxEndAddress < block.EndAddress)
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{
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maxEndAddress = block.EndAddress;
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}
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context.CurrBlock = block;
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context.MarkLabel(context.GetLabel(block.Address));
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EmitOps(context, block);
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}
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funcs.Add(new FunctionCode(context.GetOperations()));
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}
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config.SizeAdd((int)maxEndAddress + (flags.HasFlag(TranslationFlags.Compute) ? 0 : HeaderSize));
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return funcs.ToArray();
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}
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internal static void EmitOps(EmitterContext context, Block block)
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{
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for (int opIndex = 0; opIndex < block.OpCodes.Count; opIndex++)
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{
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OpCode op = block.OpCodes[opIndex];
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if ((context.Config.Flags & TranslationFlags.DebugMode) != 0)
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{
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string instName;
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if (op.Emitter != null)
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{
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instName = op.Emitter.Method.Name;
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}
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else
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{
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instName = "???";
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context.Config.GpuAccessor.Log($"Invalid instruction at 0x{op.Address:X6} (0x{op.RawOpCode:X16}).");
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}
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string dbgComment = $"0x{op.Address:X6}: 0x{op.RawOpCode:X16} {instName}";
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context.Add(new CommentNode(dbgComment));
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}
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if (op.NeverExecute)
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{
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continue;
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}
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Operand predSkipLbl = null;
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bool skipPredicateCheck = op is OpCodeBranch opBranch && !opBranch.PushTarget;
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if (op is OpCodeBranchPop opBranchPop)
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{
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// If the instruction is a SYNC or BRK instruction with only one
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// possible target address, then the instruction is basically
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// just a simple branch, we can generate code similar to branch
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// instructions, with the condition check on the branch itself.
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skipPredicateCheck = opBranchPop.Targets.Count < 2;
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}
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if (!(op.Predicate.IsPT || skipPredicateCheck))
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{
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Operand label;
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if (opIndex == block.OpCodes.Count - 1 && block.Next != null)
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{
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label = context.GetLabel(block.Next.Address);
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}
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else
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{
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label = Label();
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predSkipLbl = label;
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}
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Operand pred = Register(op.Predicate);
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if (op.InvertPredicate)
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{
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context.BranchIfTrue(label, pred);
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}
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else
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{
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context.BranchIfFalse(label, pred);
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}
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}
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context.CurrOp = op;
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op.Emitter?.Invoke(context);
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if (predSkipLbl != null)
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{
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context.MarkLabel(predSkipLbl);
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}
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}
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}
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private static FunctionCode[] Combine(FunctionCode[] a, FunctionCode[] b)
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{
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// Here we combine two shaders.
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// For shader A:
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// - All user attribute stores on shader A are turned into copies to a
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// temporary variable. It's assumed that shader B will consume them.
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// - All return instructions are turned into branch instructions, the
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// branch target being the start of the shader B code.
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// For shader B:
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// - All user attribute loads on shader B are turned into copies from a
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// temporary variable, as long that attribute is written by shader A.
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FunctionCode[] output = new FunctionCode[a.Length + b.Length - 1];
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List<Operation> ops = new List<Operation>(a.Length + b.Length);
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Operand[] temps = new Operand[AttributeConsts.UserAttributesCount * 4];
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Operand lblB = Label();
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for (int index = 0; index < a[0].Code.Length; index++)
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{
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Operation operation = a[0].Code[index];
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if (IsUserAttribute(operation.Dest))
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{
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int tIndex = (operation.Dest.Value - AttributeConsts.UserAttributeBase) / 4;
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Operand temp = temps[tIndex];
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if (temp == null)
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{
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temp = Local();
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temps[tIndex] = temp;
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}
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operation.Dest = temp;
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}
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if (operation.Inst == Instruction.Return)
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{
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ops.Add(new Operation(Instruction.Branch, lblB));
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}
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else
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{
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ops.Add(operation);
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}
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}
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ops.Add(new Operation(Instruction.MarkLabel, lblB));
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for (int index = 0; index < b[0].Code.Length; index++)
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{
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Operation operation = b[0].Code[index];
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for (int srcIndex = 0; srcIndex < operation.SourcesCount; srcIndex++)
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{
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Operand src = operation.GetSource(srcIndex);
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if (IsUserAttribute(src))
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{
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Operand temp = temps[(src.Value - AttributeConsts.UserAttributeBase) / 4];
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if (temp != null)
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{
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operation.SetSource(srcIndex, temp);
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}
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}
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}
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ops.Add(operation);
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}
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output[0] = new FunctionCode(ops.ToArray());
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for (int i = 1; i < a.Length; i++)
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{
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output[i] = a[i];
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}
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for (int i = 1; i < b.Length; i++)
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{
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output[a.Length + i - 1] = b[i];
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}
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return output;
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}
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private static bool IsUserAttribute(Operand operand)
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{
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return operand != null &&
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operand.Type == OperandType.Attribute &&
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operand.Value >= AttributeConsts.UserAttributeBase &&
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operand.Value < AttributeConsts.UserAttributeEnd;
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}
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}
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} |