[wasm] Binary 0xD: update encoding of opcodes, types, and add immediates.

src/wasm/ast-decoder.h

Index: src/wasm/ast-decoder.h
diff --git a/src/wasm/ast-decoder.h b/src/wasm/ast-decoder.h
index feafa2618fa52990afea9178a54a6a780ac3d877..9ce323efcbab6d917e75f166d47637d2e70c3e05 100644
--- a/src/wasm/ast-decoder.h
+++ b/src/wasm/ast-decoder.h
@@ -186,14 +186,19 @@ struct BreakDepthOperand {
 };
 
 struct CallIndirectOperand {
+  uint32_t table_index;
   uint32_t index;
   FunctionSig* sig;
   unsigned length;
   inline CallIndirectOperand(Decoder* decoder, const byte* pc) {
-    unsigned len1 = 0;
-    unsigned len2 = 0;
-    index = decoder->checked_read_u32v(pc, 1 + len1, &len2, "signature index");
-    length = len1 + len2;
+    unsigned len = 0;
+    index = decoder->checked_read_u32v(pc, 1, &len, "signature index");
+    table_index = decoder->checked_read_u8(pc, 1 + len, "table index");
+    if (table_index != 0) {
+      decoder->error(pc, pc + 1 + len, "expected table index 0, found %u",
+                     table_index);
+    }
+    length = 1 + len;
     sig = nullptr;
   }
 };
@@ -211,6 +216,18 @@ struct CallFunctionOperand {
   }
 };
 
+struct MemoryIndexOperand {
+  uint32_t index;
+  unsigned length;
+  inline MemoryIndexOperand(Decoder* decoder, const byte* pc) {
+    index = decoder->checked_read_u8(pc, 1, "memory index");
+    if (index != 0) {
+      decoder->error(pc, pc + 1, "expected memory index 0, found %u", index);
+    }
+    length = 1;
+  }
+};
+
 struct BranchTableOperand {
   uint32_t table_count;
   const byte* start;