glasm: Implement InvocationId

src/shader_recompiler/backend/glasm/emit_context.cpp

@@ -77,6 +77,9 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
     if (stage == Stage::Geometry && info.loads_position) {
         Add("ATTRIB vertex_position=vertex.position;");
     }
+    if (info.uses_invocation_id) {
+        Add("ATTRIB primitive_invocation=primitive.invocation;");
+    }
     for (size_t index = 0; index < program.info.stores_frag_color.size(); ++index) {
         if (!program.info.stores_frag_color[index]) {
             continue;

src/shader_recompiler/backend/glasm/emit_glasm_not_implemented.cpp

@@ -160,8 +160,8 @@ void EmitLocalInvocationId(EmitContext& ctx, IR::Inst& inst) {
     ctx.Add("MOV.S {},invocation.localid;", inst);
 }
 
-void EmitInvocationId(EmitContext& ctx) {
-    NotImplemented();
+void EmitInvocationId(EmitContext& ctx, IR::Inst& inst) {
+    ctx.Add("MOV.S {}.x,primitive_invocation.x;", inst);
 }
 
 void EmitSampleId(EmitContext& ctx) {