wasm-dis

The wasm-dis tool converts WAST into WASM. We will use the add.wasm file that we created in the previous example here. Let's look at the steps:

1. In order to convert the WebAssembly module into WebAssembly text format, using the wasm-dis binary, run the following command:

   $ /path/to/build/directory/of/binaryen/wasm-dis add.wasm -o gen-add.wast

2. We generate the gen-add.wast file using the -o option with the filename (gen-add.wast):

   (module
   (type $i32_i32_=>_i32 (func (param i32 i32) 
     (result i32)))
   (func $0 (param $0 i32) (param $1 i32) (result i32)
              (i32.add  (local.get $0)  (local.get $1) )
   )
   )

3. wasm-dis first validates the given file (.wasm) and then converts it into a .wat file. To check various options supported by wasm-dis, run the following command:

   $ /path/to/build/directory/of/binaryen/wasm-dis --help
   wasm-dis INFILE 
   Un-assemble a .wasm (WebAssembly binary...