handwritten ASM.js

gistfile1.txt

// ( +n )  // double
// ( n|0 ) // signed int



function calc_module () {

  'use asm';

  function sumInt( n1, n2 ) {

    n1 = n1|0;
    n2 = n2|0;
    
    return ( n1 + n2 )|0;

  }

  return { sumInt: sumInt };

}

console.log( calc_module().sumInt( 1, 2 ) );

// CONSOLE
// -----------------
// Successfully compiled asm.js code (total compilation time 0ms; not stored in cache) asm.html
// 3
// -----------------







function calc_module2 ( stdlib ) {

  'use asm';
  
  const PI = stdlib.Math.PI;

  function sumInt( n1, n2 ) {

    n1 = n1|0;
    n2 = n2|0;
    return ( n1 + n2 )|0;

  }

  function degToRad ( deg ) {

    deg = +deg;
    return +( deg * PI / 180.0 );

  }

  return {
    sumInt: sumInt,
    degToRad: degToRad
  };

}

console.log( calc_module2( window ).degToRad( 180 ) );

// CONSOLE
// -----------------
// Successfully compiled asm.js code (total compilation time 0ms; not stored in cache) asm.html
// 3.141592653589793
// -----------------


// Double to Int with `~~`
// ---
// var a = 1|0;
// var b = 0;
//
// b = ~~a + 0.5;
// ---

very cool!