Ryujinx/Ryujinx.Graphics.Shader/Instructions/InstEmitAttribute.cs
gdkchan d512ce122c
Initial tessellation shader support (#2534)
* Initial tessellation shader support

* Nits

* Re-arrange built-in table

* This is not needed anymore

* PR feedback
2021-10-18 18:38:04 -03:00

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6.9 KiB
C#

using Ryujinx.Graphics.Shader.Decoders;
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using Ryujinx.Graphics.Shader.Translation;
using static Ryujinx.Graphics.Shader.Instructions.InstEmitHelper;
using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
namespace Ryujinx.Graphics.Shader.Instructions
{
static partial class InstEmit
{
public static void Al2p(EmitterContext context)
{
InstAl2p op = context.GetOp<InstAl2p>();
context.Copy(GetDest(op.Dest), context.IAdd(GetSrcReg(context, op.SrcA), Const(op.Imm11)));
}
public static void Ald(EmitterContext context)
{
InstAld op = context.GetOp<InstAld>();
Operand primVertex = context.Copy(GetSrcReg(context, op.SrcB));
for (int index = 0; index < (int)op.AlSize + 1; index++)
{
Register rd = new Register(op.Dest + index, RegisterType.Gpr);
if (rd.IsRZ)
{
break;
}
if (op.Phys)
{
Operand userAttrOffset = context.ISubtract(GetSrcReg(context, op.SrcA), Const(AttributeConsts.UserAttributeBase));
Operand userAttrIndex = context.ShiftRightU32(userAttrOffset, Const(2));
context.Copy(Register(rd), context.LoadAttribute(Const(AttributeConsts.UserAttributeBase), userAttrIndex, primVertex));
context.Config.SetUsedFeature(FeatureFlags.IaIndexing);
}
else if (op.SrcB == RegisterConsts.RegisterZeroIndex || op.P)
{
int offset = op.Imm11 + index * 4;
context.FlagAttributeRead(offset);
if (op.O)
{
offset |= AttributeConsts.LoadOutputMask;
}
Operand src = op.P ? AttributePerPatch(offset) : Attribute(offset);
context.Copy(Register(rd), src);
}
else
{
int offset = op.Imm11 + index * 4;
context.FlagAttributeRead(offset);
if (op.O)
{
offset |= AttributeConsts.LoadOutputMask;
}
Operand src = Const(offset);
context.Copy(Register(rd), context.LoadAttribute(src, Const(0), primVertex));
}
}
}
public static void Ast(EmitterContext context)
{
InstAst op = context.GetOp<InstAst>();
for (int index = 0; index < (int)op.AlSize + 1; index++)
{
if (op.SrcB + index > RegisterConsts.RegisterZeroIndex)
{
break;
}
Register rd = new Register(op.SrcB + index, RegisterType.Gpr);
if (op.Phys)
{
Operand userAttrOffset = context.ISubtract(GetSrcReg(context, op.SrcA), Const(AttributeConsts.UserAttributeBase));
Operand userAttrIndex = context.ShiftRightU32(userAttrOffset, Const(2));
context.StoreAttribute(Const(AttributeConsts.UserAttributeBase), userAttrIndex, Register(rd));
context.Config.SetUsedFeature(FeatureFlags.OaIndexing);
}
else
{
// TODO: Support indirect stores using Ra.
int offset = op.Imm11 + index * 4;
context.FlagAttributeWritten(offset);
Operand dest = op.P ? AttributePerPatch(offset) : Attribute(offset);
context.Copy(dest, Register(rd));
}
}
}
public static void Ipa(EmitterContext context)
{
InstIpa op = context.GetOp<InstIpa>();
context.FlagAttributeRead(op.Imm10);
Operand res;
if (op.Idx)
{
Operand userAttrOffset = context.ISubtract(GetSrcReg(context, op.SrcA), Const(AttributeConsts.UserAttributeBase));
Operand userAttrIndex = context.ShiftRightU32(userAttrOffset, Const(2));
res = context.LoadAttribute(Const(AttributeConsts.UserAttributeBase), userAttrIndex, Const(0));
res = context.FPMultiply(res, Attribute(AttributeConsts.PositionW));
context.Config.SetUsedFeature(FeatureFlags.IaIndexing);
}
else
{
res = Attribute(op.Imm10);
if (op.Imm10 >= AttributeConsts.UserAttributeBase && op.Imm10 < AttributeConsts.UserAttributeEnd)
{
int index = (op.Imm10 - AttributeConsts.UserAttributeBase) >> 4;
if (context.Config.ImapTypes[index].GetFirstUsedType() == PixelImap.Perspective)
{
res = context.FPMultiply(res, Attribute(AttributeConsts.PositionW));
}
}
}
if (op.IpaOp == IpaOp.Multiply)
{
Operand srcB = GetSrcReg(context, op.SrcB);
res = context.FPMultiply(res, srcB);
}
res = context.FPSaturate(res, op.Sat);
context.Copy(GetDest(op.Dest), res);
}
public static void Isberd(EmitterContext context)
{
InstIsberd op = context.GetOp<InstIsberd>();
// This instruction performs a load from ISBE memory,
// however it seems to be only used to get some vertex
// input data, so we instead propagate the offset so that
// it can be used on the attribute load.
context.Copy(GetDest(op.Dest), GetSrcReg(context, op.SrcA));
}
public static void OutR(EmitterContext context)
{
InstOutR op = context.GetOp<InstOutR>();
EmitOut(context, op.OutType.HasFlag(OutType.Emit), op.OutType.HasFlag(OutType.Cut));
}
public static void OutI(EmitterContext context)
{
InstOutI op = context.GetOp<InstOutI>();
EmitOut(context, op.OutType.HasFlag(OutType.Emit), op.OutType.HasFlag(OutType.Cut));
}
public static void OutC(EmitterContext context)
{
InstOutC op = context.GetOp<InstOutC>();
EmitOut(context, op.OutType.HasFlag(OutType.Emit), op.OutType.HasFlag(OutType.Cut));
}
private static void EmitOut(EmitterContext context, bool emit, bool cut)
{
if (!(emit || cut))
{
context.Config.GpuAccessor.Log("Invalid OUT encoding.");
}
if (emit)
{
context.EmitVertex();
}
if (cut)
{
context.EndPrimitive();
}
}
}
}