[wasm] simd scalar lowering F32x4Add and I32x4Add

src/wasm/wasm-macro-gen.h

Index: src/wasm/wasm-macro-gen.h
diff --git a/src/wasm/wasm-macro-gen.h b/src/wasm/wasm-macro-gen.h
index fd10a3929a53ce23558551b03dbd53acc7068b2a..b7cf1ee96ba3284f2daa00bd7b3203025f116f37 100644
--- a/src/wasm/wasm-macro-gen.h
+++ b/src/wasm/wasm-macro-gen.h
@@ -614,6 +614,11 @@ class LocalDeclEncoder {
 #define WASM_SIMD_I32x4_SPLAT(x) x, kSimdPrefix, kExprI32x4Splat & 0xff
 #define WASM_SIMD_I32x4_EXTRACT_LANE(lane, x) \
   x, kSimdPrefix, kExprI32x4ExtractLane & 0xff, static_cast<byte>(lane)
+#define WASM_SIMD_I32x4_ADD(x, y) x, y, kSimdPrefix, kExprI32x4Add & 0xff
+#define WASM_SIMD_F32x4_SPLAT(x) x, kSimdPrefix, kExprF32x4Splat & 0xff
+#define WASM_SIMD_F32x4_EXTRACT_LANE(lane, x) \
+  x, kSimdPrefix, kExprF32x4ExtractLane & 0xff, static_cast<byte>(lane)
+#define WASM_SIMD_F32x4_ADD(x, y) x, y, kSimdPrefix, kExprF32x4Add & 0xff
 
 #define SIG_ENTRY_v_v kWasmFunctionTypeForm, 0, 0
 #define SIZEOF_SIG_ENTRY_v_v 3