VM sample

gistfile1.js

while(offset >= 0) {
  switch(offset) {
  case 0: // "PUSH 10"
    stack.push(10);
  case 2: // "PUSH 8"
    stack.push(8);
  case 4: // "LESS"
    var a = stack.pop();
    var b = stack.pop();
    stack.push((a < b)? 1: 0);
  case 8: // "IF"
    var a = stack.pop();
    if(a) { offset = 0; break; } // want GOTO
  case 10:
    offset = -1;
  }
}