Initial tessellation shader support (#2534)

* Initial tessellation shader support

* Nits

* Re-arrange built-in table

* This is not needed anymore

* PR feedback

1 files changed, 20 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.Shader/Instructions/InstEmitMove.cs b/Ryujinx.Graphics.Shader/Instructions/InstEmitMove.cs
index 245b2253..240fd6b1 100644
--- a/Ryujinx.Graphics.Shader/Instructions/InstEmitMove.cs
+++ b/Ryujinx.Graphics.Shader/Instructions/InstEmitMove.cs
@@ -79,6 +79,10 @@ namespace Ryujinx.Graphics.Shader.Instructions
                     src = Attribute(AttributeConsts.LaneId);
                     break;
 
+                case SReg.InvocationId:
+                    src = Attribute(AttributeConsts.InvocationId);
+                    break;
+
                 case SReg.YDirection:
                     src = ConstF(1); // TODO: Use value from Y direction GPU register.
                     break;
@@ -87,6 +91,22 @@ namespace Ryujinx.Graphics.Shader.Instructions
                     src = context.Config.Stage == ShaderStage.Fragment ? Attribute(AttributeConsts.ThreadKill) : Const(0);
                     break;
 
+                case SReg.InvocationInfo:
+                    if (context.Config.Stage != ShaderStage.Compute && context.Config.Stage != ShaderStage.Fragment)
+                    {
+                        Operand primitiveId = Attribute(AttributeConsts.PrimitiveId);
+                        Operand patchVerticesIn = Attribute(AttributeConsts.PatchVerticesIn);
+
+                        patchVerticesIn = context.ShiftLeft(patchVerticesIn, Const(16));
+
+                        src = context.BitwiseOr(primitiveId, patchVerticesIn);
+                    }
+                    else
+                    {
+                        src = Const(0);
+                    }
+                    break;
+
                 case SReg.TId:
                     Operand tidX = Attribute(AttributeConsts.ThreadIdX);
                     Operand tidY = Attribute(AttributeConsts.ThreadIdY);