Anyone compiling Forth VMs to WASM yet?

[RickCarlino]

I just compiled a small-ish Forth VM to Web Assembly. It works (meaning, it can evalutate strings and perform character I/O), but it is hogging all of the resources on the main tab and is not usable in its current form. I suspect error on my part rather than a bug in the original VM source because it runs just fine on native Linux.

Has anyone worked with WASM yet? Anyone have any ideas where I went wrong on this one? Comments appreciated. Here's a reproducible use case: https://github.com/RickCarlino/WASM-Forth

[massung]

I don't know web assembly, but looking over the code, my initial guess is that - when compiled to JavaScript - the variable "initialScript" is not properly null terminated.

You may want to either explicitly put a '\0' at the end or track how many bytes of the initial script have been read and see if that fixes it.

Here's hoping that's it. :)

Note: I like the way you did the BUILTIN macro.

Jeff M.

On Aug 21, 2017 18:35, "Rick Carlino" [email protected] wrote:

I just compiled a small-ish Forth VM to Web Assembly https://developer.mozilla.org/en-US/docs/WebAssembly. It works (meaning, it can evalutate strings and perform character I/O), but it is hogging all of the resources on the main tab and is not usable in its current form. I suspect error on my part rather than a bug in the original VM source because it runs just fine on native Linux.

Has anyone worked with WASM yet? Anyone have any ideas where I went wrong on this one? Comments appreciated. Here's a reproducible use case: https://github.com/RickCarlino/WASM-Forth

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[larsbrinkhoff]

@pipcet ported my Forth to asm.js. I think he did some work on wasm as well.

[phreda4]

Rick, I try to generate WASM like jit compiler but two main dificult appear. First, WASM work with a stack data but only one parameter can be return, this is an artificial limitation, search multi value return in wasm forum, perhaps change in the future, if not, I need simulate the data stack. Return stack is not accesible but you can llive with this, simulate too. Other is the ausence of jmp or goto, I compile to x86 and not to hi-level lang, I need this for an eficient compile

[postspectacular]

This too looks v. interesting: https://github.com/stefano/wasm-forth