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using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using Ryujinx.Graphics.Shader.StructuredIr;
using System;
using static Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions.InstGenHelper;
using static Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions.InstGenMemory;
using static Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions.InstGenPacking;
using static Ryujinx.Graphics.Shader.StructuredIr.InstructionInfo;
namespace Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions
{
static class InstGen
{
public static string GetExpression(CodeGenContext context, IAstNode node)
{
if (node is AstOperation operation)
{
return GetExpression(context, operation);
}
else if (node is AstOperand operand)
{
return context.OperandManager.GetExpression(operand, context.Config.Stage);
}
throw new ArgumentException($"Invalid node type \"{node?.GetType().Name ?? "null"}\".");
}
private static string GetExpression(CodeGenContext context, AstOperation operation)
{
Instruction inst = operation.Inst;
InstInfo info = GetInstructionInfo(inst);
if ((info.Type & InstType.Call) != 0)
{
bool atomic = (info.Type & InstType.Atomic) != 0;
int arity = (int)(info.Type & InstType.ArityMask);
string args = string.Empty;
for (int argIndex = 0; argIndex < arity; argIndex++)
{
if (argIndex != 0)
{
args += ", ";
}
VariableType dstType = GetSrcVarType(inst, argIndex);
if (argIndex == 0 && atomic)
{
Instruction memRegion = inst & Instruction.MrMask;
switch (memRegion)
{
case Instruction.MrShared: args += LoadShared (context, operation); break;
case Instruction.MrStorage: args += LoadStorage(context, operation); break;
default: throw new InvalidOperationException($"Invalid memory region \"{memRegion}\".");
}
// We use the first 2 operands above.
argIndex++;
}
else
{
args += GetSoureExpr(context, operation.GetSource(argIndex), dstType);
}
}
if (inst == Instruction.Ballot)
{
return $"unpackUint2x32({info.OpName}({args})).x";
}
else
{
return info.OpName + "(" + args + ")";
}
}
else if ((info.Type & InstType.Op) != 0)
{
string op = info.OpName;
int arity = (int)(info.Type & InstType.ArityMask);
string[] expr = new string[arity];
for (int index = 0; index < arity; index++)
{
IAstNode src = operation.GetSource(index);
string srcExpr = GetSoureExpr(context, src, GetSrcVarType(inst, index));
bool isLhs = arity == 2 && index == 0;
expr[index] = Enclose(srcExpr, src, inst, info, isLhs);
}
switch (arity)
{
case 0:
return op;
case 1:
return op + expr[0];
case 2:
return $"{expr[0]} {op} {expr[1]}";
case 3:
return $"{expr[0]} {op[0]} {expr[1]} {op[1]} {expr[2]}";
}
}
else if ((info.Type & InstType.Special) != 0)
{
switch (inst)
{
case Instruction.ImageLoad:
return ImageLoadOrStore(context, operation);
case Instruction.ImageStore:
return ImageLoadOrStore(context, operation);
case Instruction.LoadAttribute:
return LoadAttribute(context, operation);
case Instruction.LoadConstant:
return LoadConstant(context, operation);
case Instruction.LoadLocal:
return LoadLocal(context, operation);
case Instruction.LoadShared:
return LoadShared(context, operation);
case Instruction.LoadStorage:
return LoadStorage(context, operation);
case Instruction.Lod:
return Lod(context, operation);
case Instruction.PackDouble2x32:
return PackDouble2x32(context, operation);
case Instruction.PackHalf2x16:
return PackHalf2x16(context, operation);
case Instruction.StoreLocal:
return StoreLocal(context, operation);
case Instruction.StoreShared:
return StoreShared(context, operation);
case Instruction.StoreStorage:
return StoreStorage(context, operation);
case Instruction.TextureSample:
return TextureSample(context, operation);
case Instruction.TextureSize:
return TextureSize(context, operation);
case Instruction.UnpackDouble2x32:
return UnpackDouble2x32(context, operation);
case Instruction.UnpackHalf2x16:
return UnpackHalf2x16(context, operation);
}
}
throw new InvalidOperationException($"Unexpected instruction type \"{info.Type}\".");
}
}
}
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