Difference between revisions of "WebAssembly"

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The expected format is a slightly different between those two:
 
The expected format is a slightly different between those two:
  
'''wat2wasm''' (Wabt)
+
===wat2wasm (Wabt)===
 +
Example:
 +
<source lang="lisp">
 
  (module
 
  (module
 
   (func $add (param $lhs i32) (param $rhs i32) (result i32)
 
   (func $add (param $lhs i32) (param $rhs i32) (result i32)
Line 12: Line 14:
 
   (export "add" (func $add))
 
   (export "add" (func $add))
 
  )
 
  )
 +
</source>
 +
According to the official site "Wabt" is using it's own format of the Wasm.
 +
It's slightly different from the official documentation. The most current version of Wabt matches the specs, as well as supports the old syntax.
  
'''wasm-as''' (emscripten)  
+
Online studio, that's using the older version of wabt syntax. https://webassembly.studio/
 +
 
 +
For example. instead of
 +
local.get
 +
it's using
 +
get_local
 +
 
 +
===wasm-as (emscripten)===
 +
The assembler is recommended for the use in a compiler by the WebAssembly.org
 +
<source lang="lisp">
 
  (module
 
  (module
 
   (func $add (param $lhs i32) (param $rhs i32) (result i32)
 
   (func $add (param $lhs i32) (param $rhs i32) (result i32)
Line 24: Line 38:
 
   (export "add" (func $add))
 
   (export "add" (func $add))
 
  )
 
  )
 +
</source>
 +
 +
==Use on the Wiki==
 +
WebAssembly is using s-expressions as its textual format (for either Wabt or Emscript) .
 +
it's handy to use syntax highlighter for the code and use "lisp" language to set colors.
 +
<pre>
 +
  <source lang="lisp">
 +
    ;; web assembly goes here
 +
  </source>
 +
</pre>
 
==See Also==
 
==See Also==
 +
* [[WebAssembly/Roadmap]]
 +
* [[WebAssembly/Compiler]] - getting the compiler
 +
* [[WebAssembly/JS]]
 +
* [[WebAssembly/Internals]]
 +
* [[WebAssembly/Instructions]] - Instructions of the WASM code
 
* https://webassembly.org/ - the official site
 
* https://webassembly.org/ - the official site
 
* https://webassembly.github.io/spec/core/text/index.html - text format (S-Expression) specs
 
* https://webassembly.github.io/spec/core/text/index.html - text format (S-Expression) specs
 
* https://webassembly.github.io/spec/core/binary/index.html - binary format specs
 
* https://webassembly.github.io/spec/core/binary/index.html - binary format specs
 +
* https://developer.mozilla.org/en-US/docs/WebAssembly/Understanding_the_text_format
 +
 
* https://rsms.me/wasm-intro - introduction to webassembly
 
* https://rsms.me/wasm-intro - introduction to webassembly
 +
* https://blog.scottlogic.com/2018/04/26/webassembly-by-hand.html
 
[[Category:WebAssembly]]
 
[[Category:WebAssembly]]

Revision as of 11:50, 26 November 2019

Assemblers

There are different assemblers available, from Wabt and emscripten.org. The expected format is a slightly different between those two:

wat2wasm (Wabt)

Example:

 (module
   (func $add (param $lhs i32) (param $rhs i32) (result i32)
     local.get $lhs
     local.get $rhs
     i32.add
   )
   (export "add" (func $add))
 )

According to the official site "Wabt" is using it's own format of the Wasm. It's slightly different from the official documentation. The most current version of Wabt matches the specs, as well as supports the old syntax.

Online studio, that's using the older version of wabt syntax. https://webassembly.studio/

For example. instead of

local.get

it's using

get_local

wasm-as (emscripten)

The assembler is recommended for the use in a compiler by the WebAssembly.org

 (module
   (func $add (param $lhs i32) (param $rhs i32) (result i32)
     (
     local.get $lhs
     local.get $rhs
     i32.add
     )
   )
   (export "add" (func $add))
 )

Use on the Wiki

WebAssembly is using s-expressions as its textual format (for either Wabt or Emscript) . it's handy to use syntax highlighter for the code and use "lisp" language to set colors.

  <source lang="lisp">
    ;; web assembly goes here
  </source>

See Also