[mlir][dxsa] Add dcl_input_siv instruction

Example:
  dxsa.dcl_input_siv <type = input, components = 4, mask = <x, y, z, w>, index = [0]>, <position>

Signed-off-by: Vladimir Shiryaev <tagolog@users.noreply.github.com>

Author: tagolog

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

@@ -759,6 +759,24 @@ def DXSA_DclIndexRange : DXSA_Op<"dcl_index_range"> {
   let hasVerifier = 1;
 }
 
+def DXSA_DclInputSiv : DXSA_Op<"dcl_input_siv"> {
+  let summary = "declares an input register as a System Interpreted Value";
+  let description = [{
+    The `dxsa.dcl_input_siv` operation declares an input register
+    that expects a System Interpreted Value to be provided
+    from the upstream Stage.
+
+    Example:
+
+    ```mlir
+    dxsa.dcl_input_siv <type = input, components = 4, mask = <x, y, z, w>, index = [0]>, <position>
+    ```
+  }];
+  let arguments = (ins DXSA_InlineOperandAttr:$operand,
+                       DXSA_SystemValueNameAttr:$name);
+  let assemblyFormat = "$operand `,` $name attr-dict";
+}
+
 def DXSA_DclOutputSgv : DXSA_Op<"dcl_output_sgv"> {
   let summary = "declares an output as a System Generated Value";
   let description = [{

mlir/lib/Target/DXSA/BinaryParser.cpp

@@ -651,6 +651,12 @@ class DXBuilder {
                                        builder.getI32IntegerAttr(count));
   }
 
+  Instruction buildDclInputSiv(dxsa::InlineOperandAttr operand,
+                               dxsa::SystemValueName name, Location loc) {
+    auto nameAttr = dxsa::SystemValueNameAttr::get(builder.getContext(), name);
+    return dxsa::DclInputSiv::create(builder, loc, operand, nameAttr);
+  }
+
   Instruction buildDclOutputSgv(dxsa::InlineOperandAttr operand,
                                 dxsa::SystemValueName name, Location loc) {
     auto nameAttr = dxsa::SystemValueNameAttr::get(builder.getContext(), name);
@@ -1275,6 +1281,14 @@ class Parser {
     return builder.buildDclIndexRange(*operand, *count, loc);
   }
 
+  FailureOr<Instruction> parseDclInputSiv(Location loc) {
+    auto operand = parseInlineOperand();
+    FAILURE_IF_FAILED(operand);
+    auto name = parseSystemValueName(getLocation());
+    FAILURE_IF_FAILED(name);
+    return builder.buildDclInputSiv(*operand, *name, loc);
+  }
+
   FailureOr<Instruction> parseDclOutputSgv(Location loc) {
     auto operand = parseInlineOperand();
     FAILURE_IF_FAILED(operand);
@@ -1441,6 +1455,9 @@ class Parser {
     case D3D10_SB_OPCODE_DCL_INDEX_RANGE:
       result = parseDclIndexRange(loc);
       break;
+    case D3D10_SB_OPCODE_DCL_INPUT_SIV:
+      result = parseDclInputSiv(loc);
+      break;
     case D3D10_SB_OPCODE_DCL_OUTPUT_SGV:
       result = parseDclOutputSgv(loc);
       break;

mlir/test/Target/DXSA/dcl_input_siv.mlir

@@ -0,0 +1,8 @@
+// RUN: mlir-translate --import-dxsa-bin %S/inputs/dcl_input_siv.bin | FileCheck %s
+
+// CHECK:      module {
+// CHECK-NEXT:   dxsa.dcl_input_siv <type = input, components = 4, mask = <x, y, z, w>, index = [0]>, <position>
+// CHECK-NEXT:   dxsa.dcl_input_siv <type = input, components = 4, mask = <x, y, z>, index = [1]>, <clipDistance>
+// CHECK-NEXT:   dxsa.dcl_input_siv <type = input, components = 4, mask = <x, y>, index = [2]>, <cullDistance>
+// CHECK-NEXT:   dxsa.dcl_input_siv <type = input, components = 4, mask = <x>, index = [3]>, <finalQuadUInsideTessFactor>
+// CHECK-NEXT: }