This is an example compiler for FlooP programs that can generate JavaScript or asm.js code.
You'll need node.js and npm first. Grab the source code from github and install dependencies:
git clone git://github.com/zaach/floop.js.git
cd floop.js
npm install
You also need to download the source code for the modified LLJS to asm.js compiler:
git clone git://github.com/zaach/LLJS.git
Add the ljc executable to your path, or export it in the LJC_PATH environmental variable:
cd LLJS
export LJC_PATH=`pwd`/bin/ljc
To use the command-line JavaScript shell with asm.js support, grab a jsshell binary from the Firefox Nightly build directory. The Nightly Firefox builds also support asm.js.
Use the floopc CLI to compile your FlooP programs.
node ./bin/floopc [options] <file>
Options:
-b, --backend Backend to use for code generation [asmjs, js, lljs] [default: "asmjs"]
-e, --exported-funcs The functions to export (comma-delimited)
-a, --ast Print only an ast [boolean]
-p, --parse Parse only [boolean]
-m, --module-name Export the module with this name
Generate an asm.js module of your FlooP program:
cd floop.js
./bin/floopc examples/fibo.bloop -e FIBO -m fibo > fibo.js
Include this module in a webpage to run:
<script src="fibo.js"></script>
<script>
// log the 8th fibonacci number
console.log(fibo.FIBO(8));
</script>
If you want the script to execute from the command-line, don't specify any functions to export and it will run the MAIN function defined in the FLooP module:
./bin/floopc examples/fibo.bloop > fibo-shell.js
Then run it from the command-line:
$ node fibo-shell.js
17711
10
You should see any output you have printed from the module, followed by the number of miliseconds it took to execute the program (10 in this case).
If you use a js executable with asm.js support, you'll also get feedback on the correctness of the asm.js module after it goes through its checks:
$ js fibo.js
warning: Successfully compiled asm.js code
17711
1
Wow, just look at how fast that is.
MIT