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Ryujinx/Ryujinx.Graphics/Shader/CodeGen/Glsl/GlslGenerator.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
2019-04-18 00:57:08 +01:00
using Ryujinx.Graphics.Gal;
using Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions;
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using Ryujinx.Graphics.Shader.StructuredIr;
using System;
using static Ryujinx.Graphics.Shader.CodeGen.Glsl.TypeConversion;
namespace Ryujinx.Graphics.Shader.CodeGen.Glsl
{
static class GlslGenerator
{
public static GlslProgram Generate(StructuredProgramInfo info, ShaderConfig config)
{
CodeGenContext context = new CodeGenContext(config);
Declarations.Declare(context, info);
PrintMainBlock(context, info);
return new GlslProgram(
context.CBufferDescriptors.ToArray(),
context.TextureDescriptors.ToArray(),
context.GetCode());
}
private static void PrintMainBlock(CodeGenContext context, StructuredProgramInfo info)
{
context.AppendLine("void main()");
context.EnterScope();
Declarations.DeclareLocals(context, info);
PrintBlock(context, info.MainBlock);
context.LeaveScope();
}
private static void PrintBlock(CodeGenContext context, AstBlock block)
{
AstBlockVisitor visitor = new AstBlockVisitor(block);
visitor.BlockEntered += (sender, e) =>
{
switch (e.Block.Type)
{
case AstBlockType.DoWhile:
context.AppendLine("do");
break;
case AstBlockType.Else:
context.AppendLine("else");
break;
case AstBlockType.ElseIf:
context.AppendLine($"else if ({GetCondExpr(context, e.Block.Condition)})");
break;
case AstBlockType.If:
context.AppendLine($"if ({GetCondExpr(context, e.Block.Condition)})");
break;
default: throw new InvalidOperationException($"Found unexpected block type \"{e.Block.Type}\".");
}
context.EnterScope();
};
visitor.BlockLeft += (sender, e) =>
{
context.LeaveScope();
if (e.Block.Type == AstBlockType.DoWhile)
{
context.AppendLine($"while ({GetCondExpr(context, e.Block.Condition)});");
}
};
foreach (IAstNode node in visitor.Visit())
{
if (node is AstOperation operation)
{
if (operation.Inst == Instruction.Return)
{
PrepareForReturn(context);
}
context.AppendLine(InstGen.GetExpression(context, operation) + ";");
}
else if (node is AstAssignment assignment)
{
VariableType srcType = OperandManager.GetNodeDestType(assignment.Source);
VariableType dstType = OperandManager.GetNodeDestType(assignment.Destination);
string dest;
if (assignment.Destination is AstOperand operand && operand.Type == OperandType.Attribute)
{
dest = OperandManager.GetOutAttributeName(operand, context.Config.Type);
}
else
{
dest = InstGen.GetExpression(context, assignment.Destination);
}
string src = ReinterpretCast(context, assignment.Source, srcType, dstType);
context.AppendLine(dest + " = " + src + ";");
}
else
{
throw new InvalidOperationException($"Found unexpected node type \"{node?.GetType().Name ?? "null"}\".");
}
}
}
private static string GetCondExpr(CodeGenContext context, IAstNode cond)
{
VariableType srcType = OperandManager.GetNodeDestType(cond);
return ReinterpretCast(context, cond, srcType, VariableType.Bool);
}
private static void PrepareForReturn(CodeGenContext context)
{
if (context.Config.Type == GalShaderType.Vertex)
{
context.AppendLine("gl_Position.xy *= flip;");
}
}
}
}