[dxbc] Add new emitNewSpecConstant method

Convenience method to declare new specialization constants.

src/dxbc/dxbc_compiler.cpp

@@ -5427,6 +5427,20 @@ namespace dxvk {
   }
   
   
+  uint32_t DxbcCompiler::emitNewSpecConstant(
+          DxvkSpecConstantId      specId,
+          DxbcScalarType          type,
+          uint32_t                value,
+    const char*                   name) {
+    uint32_t id = m_module.specConst32(
+      getScalarTypeId(type), value);
+    
+    m_module.decorateSpecId(id, uint32_t(specId));
+    m_module.setDebugName(id, name);
+    return id;
+  }
+
+
   DxbcRegisterValue DxbcCompiler::getSpecConstant(DxvkSpecConstantId specId) {
     const uint32_t specIdOffset = uint32_t(specId) - uint32_t(DxvkSpecConstantId::SpecConstantIdMin);
     

src/dxbc/dxbc_compiler.h

@@ -986,6 +986,12 @@ namespace dxvk {
     
     ////////////////////////////////////////
     // Spec constant declaration and access
+    uint32_t emitNewSpecConstant(
+            DxvkSpecConstantId      specId,
+            DxbcScalarType          type,
+            uint32_t                value,
+      const char*                   name);
+
     DxbcRegisterValue getSpecConstant(
             DxvkSpecConstantId      specId);