Implement Geometry shaders (#280)

* Implement Geometry shaders

* Add EmitVertex() and EndPrimitive()

* Read output geometry data from header

* Stub Vmad

* Add Iadd_I32

* Stub Mov_S (S2R)

* Stub Isberd

* Change vertex index to gpr39 in Abuf

* Add stub messages for consistency

* Do not print input block when there is no attributes

* Use GL_ARB_enhanced_layouts

* Skip geometry shaders when there's no GL_ARB_enhanced_layouts

* Address feedback

* Address feedback

1 files changed, 20 insertions, 0 deletions

diff --git a/Ryujinx.Graphics/Gal/Shader/ShaderDecodeMove.cs b/Ryujinx.Graphics/Gal/Shader/ShaderDecodeMove.cs
index 4c9e59cf..c6b71fb0 100644
--- a/Ryujinx.Graphics/Gal/Shader/ShaderDecodeMove.cs
+++ b/Ryujinx.Graphics/Gal/Shader/ShaderDecodeMove.cs
@@ -85,6 +85,16 @@ namespace Ryujinx.Graphics.Gal.Shader
             EmitI2i(Block, OpCode, ShaderOper.RR);
         }
 
+        public static void Isberd(ShaderIrBlock Block, long OpCode)
+        {
+            //This instruction seems to be used to translate from an address to a vertex index in a GS
+            //Stub it as such
+
+            Block.AddNode(new ShaderIrCmnt("Stubbed."));
+
+            Block.AddNode(GetPredNode(new ShaderIrAsg(GetOperGpr0(OpCode), GetOperGpr8(OpCode)), OpCode));
+        }
+
         public static void Mov_C(ShaderIrBlock Block, long OpCode)
         {
             ShaderIrOperCbuf Cbuf = GetOperCbuf34(OpCode);
@@ -128,6 +138,16 @@ namespace Ryujinx.Graphics.Gal.Shader
             EmitSel(Block, OpCode, ShaderOper.RR);
         }
 
+        public static void Mov_S(ShaderIrBlock Block, long OpCode)
+        {
+            Block.AddNode(new ShaderIrCmnt("Stubbed."));
+
+            //Zero is used as a special number to get a valid "0 * 0 + VertexIndex" in a GS
+            ShaderIrNode Source = new ShaderIrOperImm(0);
+
+            Block.AddNode(GetPredNode(new ShaderIrAsg(GetOperGpr0(OpCode), Source), OpCode));
+        }
+
         private static void EmitF2f(ShaderIrBlock Block, long OpCode, ShaderOper Oper)
         {
             bool NegA = ((OpCode >> 45) & 1) != 0;