[mlir][dxsa] Add dcl_tessellator_domain instruction

mlir/include/mlir/Dialect/DXSA/IR/DXSAOps.td

@@ -51,6 +51,25 @@ def DXSA_GlobalFlagsAttr :
   let assemblyFormat = "`<` $value `>`";
 }
 
+def DXSA_TessellatorDomain_Isoline : I32EnumAttrCase<"domain_isoline", 1>;
+def DXSA_TessellatorDomain_Tri     : I32EnumAttrCase<"domain_tri",     2>;
+def DXSA_TessellatorDomain_Quad    : I32EnumAttrCase<"domain_quad",    3>;
+
+def DXSA_TessellatorDomain : I32EnumAttr<
+    "TessellatorDomain", "tessellator domain", [
+      DXSA_TessellatorDomain_Isoline,
+      DXSA_TessellatorDomain_Tri,
+      DXSA_TessellatorDomain_Quad
+    ]> {
+  let cppNamespace = "::mlir::dxsa";
+  let genSpecializedAttr = 0;
+}
+
+def DXSA_TessellatorDomainAttr :
+    EnumAttr<DXSADialect, DXSA_TessellatorDomain, "tessellator_domain"> {
+  let assemblyFormat = "$value";
+}
+
 //===----------------------------------------------------------------------===//
 // DXSA op definitions
 //===----------------------------------------------------------------------===//
@@ -196,4 +215,21 @@ def DXSA_DclOutputControlPointCount :
   let assemblyFormat = [{ $count attr-dict }];
 }
 
+def DXSA_DclTessellatorDomain : DXSA_Op<"dcl_tessellator_domain"> {
+  let summary = "declares the tessellator domain";
+  let description = [{
+    The `dxsa.dcl_tessellator_domain` operation declares the tessellator
+    domain.
+
+    Example:
+
+    ```mlir
+    dxsa.dcl_tessellator_domain domain_quad
+    ```
+  }];
+
+  let arguments = (ins DXSA_TessellatorDomainAttr:$domain);
+  let assemblyFormat = "$domain attr-dict";
+}
+
 #endif // DXSA_OPS

mlir/lib/Target/DXSA/BinaryParser.cpp

@@ -529,6 +529,12 @@ class DXBuilder {
         builder, loc, builder.getI32IntegerAttr(count));
   }
 
+  Instruction buildDclTessellatorDomain(uint32_t domain, Location loc) {
+    auto domainAttr = dxsa::TessellatorDomainAttr::get(
+        builder.getContext(), static_cast<dxsa::TessellatorDomain>(domain));
+    return dxsa::DclTessellatorDomain::create(builder, loc, domainAttr);
+  }
+
 private:
   MLIRContext *context;
   ModuleOp module;
@@ -891,6 +897,14 @@ class Parser {
     return builder.buildDclOutputControlPointCount(count, loc);
   }
 
+  FailureOr<Instruction> parseDclTessellatorDomain(uint32_t opcodeToken,
+                                                   Location loc) {
+    auto domain = DECODE_D3D11_SB_TESS_DOMAIN(opcodeToken);
+    if (domain == D3D11_SB_TESSELLATOR_DOMAIN_UNDEFINED)
+      return emitError(getLocation(), "tessellator domain cannot be zero");
+    return builder.buildDclTessellatorDomain(domain, loc);
+  }
+
   OptionalParseResult parseDclInstruction(uint32_t opcodeToken, Location loc,
                                           Instruction &out) {
     FailureOr<Instruction> result;
@@ -907,6 +921,9 @@ class Parser {
     case D3D11_SB_OPCODE_DCL_OUTPUT_CONTROL_POINT_COUNT:
       result = parseDclOutputControlPointCount(opcodeToken, loc);
       break;
+    case D3D11_SB_OPCODE_DCL_TESS_DOMAIN:
+      result = parseDclTessellatorDomain(opcodeToken, loc);
+      break;
     default:
       return std::nullopt;
     }

mlir/test/Target/DXSA/dcl_tessellator_domain.mlir

@@ -0,0 +1,7 @@
+// RUN: mlir-translate --import-dxsa-bin %S/inputs/dcl_tessellator_domain.bin | FileCheck %s
+
+// CHECK:      module {
+// CHECK-NEXT:   dxsa.dcl_tessellator_domain domain_isoline
+// CHECK-NEXT:   dxsa.dcl_tessellator_domain domain_tri
+// CHECK-NEXT:   dxsa.dcl_tessellator_domain domain_quad
+// CHECK-NEXT: }