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using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using System.Collections.Generic;
using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
namespace Ryujinx.Graphics.Shader.Translation.Optimizations
{
static class DoubleToFloat
{
public static void RunPass(HelperFunctionManager hfm, BasicBlock block)
{
for (LinkedListNode<INode> node = block.Operations.First; node != null; node = node.Next)
{
if (node.Value is not Operation operation)
{
continue;
}
node = InsertSoftFloat64(hfm, node);
}
}
private static LinkedListNode<INode> InsertSoftFloat64(HelperFunctionManager hfm, LinkedListNode<INode> node)
{
Operation operation = (Operation)node.Value;
if (operation.Inst == Instruction.PackDouble2x32)
{
int functionId = hfm.GetOrCreateFunctionId(HelperFunctionName.ConvertDoubleToFloat);
Operand[] callArgs = new Operand[] { Const(functionId), operation.GetSource(0), operation.GetSource(1) };
Operand floatValue = operation.Dest;
operation.Dest = null;
LinkedListNode<INode> newNode = node.List.AddBefore(node, new Operation(Instruction.Call, 0, floatValue, callArgs));
Utils.DeleteNode(node, operation);
return newNode;
}
else if (operation.Inst == Instruction.UnpackDouble2x32)
{
int functionId = hfm.GetOrCreateFunctionId(HelperFunctionName.ConvertFloatToDouble);
// TODO: Allow UnpackDouble2x32 to produce two outputs and get rid of "operation.Index".
Operand resultLow = operation.Index == 0 ? operation.Dest : Local();
Operand resultHigh = operation.Index == 1 ? operation.Dest : Local();
operation.Dest = null;
Operand[] callArgs = new Operand[] { Const(functionId), operation.GetSource(0), resultLow, resultHigh };
LinkedListNode<INode> newNode = node.List.AddBefore(node, new Operation(Instruction.Call, 0, (Operand)null, callArgs));
Utils.DeleteNode(node, operation);
return newNode;
}
else
{
operation.TurnDoubleIntoFloat();
return node;
}
}
}
}
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