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void
_delay_ms(double __ms)
{
   uint16_t __ticks;
   double __tmp ;
#if __HAS_DELAY_CYCLES && defined(__OPTIMIZE__) && !defined(__DELAY_BACKWARD_COMPATIBLE__)
   uint32_t __ticks_dc;
   extern void __builtin_avr_delay_cycles(unsigned long);
   __tmp = ((F_CPU) / 1e3) * __ms;

   #if defined(__DELAY_ROUND_DOWN__)
      __ticks_dc = (uint32_t)fabs(__tmp);

   #elif defined(__DELAY_ROUND_CLOSEST__)
      __ticks_dc = (uint32_t)(fabs(__tmp)+0.5);

   #else
      //round up by default
      __ticks_dc = (uint32_t)(ceil(fabs(__tmp)));
   #endif

   __builtin_avr_delay_cycles(__ticks_dc);

#elif !__HAS_DELAY_CYCLES || (__HAS_DELAY_CYCLES && !defined(__OPTIMIZE__)) || defined (__DELAY_BACKWARD_COMPATIBLE__)
   __tmp = ((F_CPU) / 4e3) * __ms;
   if (__tmp < 1.0)
      __ticks = 1;
   else if (__tmp > 65535)
   {
      //   __ticks = requested delay in 1/10 ms
      __ticks = (uint16_t) (__ms * 10.0);
      while(__ticks)
      {
         // wait 1/10 ms
         _delay_loop_2(((F_CPU) / 4e3) / 10);
         __ticks --;
      }
      return;
   }
   else
      __ticks = (uint16_t)__tmp;
   _delay_loop_2(__ticks);
#endif
}

#ifndef __OPTIMIZE__
# warning "Compiler optimizations disabled; functions from <util/delay.h> won't work as designed"
#endif