2 files changed, 29 insertions, 0 deletions
diff --git a/source/compiler-core/slang-downstream-compiler.h b/source/compiler-core/slang-downstream-compiler.h
index c23a6eff0..6ffcf7aea 100644
--- a/source/compiler-core/slang-downstream-compiler.h
+++ b/source/compiler-core/slang-downstream-compiler.h
@@ -197,6 +197,13 @@ struct DownstreamCompileOptions
         Precise,
     };
 
+    enum class FloatingPointDenormalMode : uint8_t
+    {
+        Any,
+        Preserve,
+        FlushToZero,
+    };
+
     enum PipelineType : uint8_t
     {
         Unknown,
@@ -277,6 +284,11 @@ struct DownstreamCompileOptions
 
     // The debug info format to use.
     SlangDebugInfoFormat m_debugInfoFormat = SLANG_DEBUG_INFO_FORMAT_DEFAULT;
+
+    // The floating point denormal handling mode to use for each floating point precision
+    FloatingPointDenormalMode denormalModeFp16 = FloatingPointDenormalMode::Any;
+    FloatingPointDenormalMode denormalModeFp32 = FloatingPointDenormalMode::Any;
+    FloatingPointDenormalMode denormalModeFp64 = FloatingPointDenormalMode::Any;
 };
 static_assert(std::is_trivially_copyable_v<DownstreamCompileOptions>);
 
@@ -482,6 +494,7 @@ struct DownstreamCompilerUtilBase
     typedef CompileOptions::DebugInfoType DebugInfoType;
 
     typedef CompileOptions::FloatingPointMode FloatingPointMode;
+    typedef CompileOptions::FloatingPointDenormalMode FloatingPointDenormalMode;
 
     typedef DownstreamProductFlag ProductFlag;
     typedef DownstreamProductFlags ProductFlags;
diff --git a/source/compiler-core/slang-dxc-compiler.cpp b/source/compiler-core/slang-dxc-compiler.cpp
index 0d4bc0a59..e27a0fc37 100644
--- a/source/compiler-core/slang-dxc-compiler.cpp
+++ b/source/compiler-core/slang-dxc-compiler.cpp
@@ -512,6 +512,22 @@ SlangResult DXCDownstreamCompiler::compile(const CompileOptions& inOptions, IArt
         break;
     }
 
+    switch (options.denormalModeFp32)
+    {
+    default:
+    case CompileOptions::FloatingPointDenormalMode::Any:
+        break;
+
+    case CompileOptions::FloatingPointDenormalMode::Preserve:
+        args.add(L"-denorm");
+        args.add(L"preserve");
+        break;
+
+    case CompileOptions::FloatingPointDenormalMode::FlushToZero:
+        args.add(L"-denorm");
+        args.add(L"ftz");
+        break;
+    }
 
     switch (options.optimizationLevel)
     {