code: def _notf(ins):
      ''' Negates top of the stack (48 bits)
      '''
      output = _float_oper(ins.quad[2])
      output.append('call __NOTF')
      output.append('push af')
      REQUIRES.add('notf.asm')
      return outpuf _notf(ins):
      ''' Negates top of the stack (48 bits)
      '''
      output = _float_oper(ins.quad[2])
      output.append('call __NOTF')
      output.append('push af')
      REQUIRES.add('notf.asm')
      return output
docs: Negates top of the stack (48 bits)