1 files changed, 25 insertions, 0 deletions
diff --git a/src/wasm-features.h b/src/wasm-features.h
index 49f49db09..6c58f1642 100644
--- a/src/wasm-features.h
+++ b/src/wasm-features.h
@@ -18,6 +18,9 @@
 #define wasm_features_h
 
 #include <stdint.h>
+#include <string>
+
+#include "compiler-support.h"
 
 struct FeatureSet {
   enum Feature : uint32_t {
@@ -31,6 +34,18 @@ struct FeatureSet {
     All = Atomics | MutableGlobals | TruncSat | SIMD | BulkMemory | SignExt
   };
 
+  static std::string toString(Feature f) {
+    switch (f) {
+      case Atomics: return "threads";
+      case MutableGlobals: return "mutable-globals";
+      case TruncSat: return "nontrapping-float-to-int";
+      case SIMD: return "simd";
+      case BulkMemory: return "bulk-memory";
+      case SignExt: return "sign-ext";
+      default: WASM_UNREACHABLE();
+    }
+  }
+
   FeatureSet() : features(MVP) {}
   FeatureSet(uint32_t features) : features(features) {}
 
@@ -59,6 +74,16 @@ struct FeatureSet {
     features = features & ~other.features & All;
   }
 
+  template<typename F>
+  void iterFeatures(F f) {
+    if (hasAtomics()) f(Atomics);
+    if (hasMutableGlobals()) f(MutableGlobals);
+    if (hasTruncSat()) f(TruncSat);
+    if (hasSIMD()) f(SIMD);
+    if (hasBulkMemory()) f(BulkMemory);
+    if (hasSignExt()) f(SignExt);
+  }
+
   bool operator<=(const FeatureSet& other) {
     return !(features & ~other.features);
   }