MASK
#define MASK (~(unsigned long)0<<28)
#define MASK(n) ((1 << (n)) - 1)
#define MASK 0377
#define MASK(n) ((1 << (n)) - 1)
#define MASK (~(unsigned long)0<<28)
#define MASK(m) ((1ul << (m)) - 1ul)
#define MASK (~((unsigned long)1L<<L))
#define MASK (~((unsigned long)1<<L)) /* mask out sign */
#define MASK ((unsigned)(1 << (N - 1)) + (1 << (N - 1)) - 1)
#define MASK 0x00000fff
#define MASK(n) ((1 << (n)) - 1)
#define MASK 0377
#define MASK ((1 << __CHAR_BIT__) - 1)
#define MASK(B) (1 << (B))
#define MASK ((unsigned)(1 << (N - 1)) + (1 << (N - 1)) - 1)
#define MASK(nbits) ((1 << (nbits)) - 1)
#define MASK(nbits) ((1 << (nbits)) - 1)
#define MASK HEX
#define MASK(n) ((1ULL<<(n))-1)
#define MASK(n) ((1 << (n)) - 1) /* make an n-bit mask */
#define MASK(n) ((1ULL << (n)) - 1)
#define MASK 0x00000fff