code: def _fploadstr(ins):
      
      output = _pload(ins.quad[2], 2)
      if ins.quad[1][0] != '$':
          output.append('call __LOADSTR')
          REQUIRES.add('loadstr.asm')
  
      return output
docs: Loads from stack pointer (SP) + X, being
      X 2st parameter.
  
      1st operand must be a SIGNED integer.
      Unlike ploadstr, this version does not push the result
      back into the stack.