fusl/include/sys/sysmacros.h

#ifndef _SYS_SYSMACROS_H
#define _SYS_SYSMACROS_H

#define major(x) \
  ((unsigned)((((x) >> 31 >> 1) & 0xfffff000) | (((x) >> 8) & 0x00000fff)))
#define minor(x) ((unsigned)((((x) >> 12) & 0xffffff00) | ((x)&0x000000ff)))

#define makedev(x, y)                                         \
  ((((x)&0xfffff000ULL) << 32) | (((x)&0x00000fffULL) << 8) | \
   (((y)&0xffffff00ULL) << 12) | (((y)&0x000000ffULL)))

#endif