Differential D19475 Diff 54772 sys/dev/random/uint128.h

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sys/dev/random/uint128.h

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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.		* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*		*
* $FreeBSD$		* $FreeBSD$
*/		*/

#ifndef SYS_DEV_RANDOM_UINT128_H_INCLUDED		#ifndef SYS_DEV_RANDOM_UINT128_H_INCLUDED
#define SYS_DEV_RANDOM_UINT128_H_INCLUDED		#define SYS_DEV_RANDOM_UINT128_H_INCLUDED

		#include <sys/endian.h>

/* This whole thing is a crock :-(		/* This whole thing is a crock :-(
*		*
* Everyone knows you always need the __uint128_t types!		* Everyone knows you always need the __uint128_t types!
*/		*/

#ifdef __SIZEOF_INT128__		#ifdef __SIZEOF_INT128__
#define USE_REAL_UINT128_T		#define USE_REAL_UINT128_T
#endif		#endif
Show All 18 Lines	#ifdef USE_REAL_UINT128_T
(*big_uintp)++;		(*big_uintp)++;
#else		#else
big_uintp->u128t_word0++;		big_uintp->u128t_word0++;
if (big_uintp->u128t_word0 == 0UL)		if (big_uintp->u128t_word0 == 0UL)
big_uintp->u128t_word1++;		big_uintp->u128t_word1++;
#endif		#endif
}		}

		static __inline bool
		uint128_equals(uint128_t a, uint128_t b)
		{
		#ifdef USE_REAL_UINT128_T
		return (a == b);
		#else
		return (a.u128t_word0 == b.u128t_word0 &&
		a.u128t_word1 == b.u128t_word1);
		#endif
		}

static __inline int		static __inline int
uint128_is_zero(uint128_t big_uint)		uint128_is_zero(uint128_t big_uint)
{		{
		return (uint128_equals(big_uint, UINT128_ZERO));
		}

		static __inline uint128_t
		le128dec(const void *pp)
		{
		const uint8_t *p = pp;

#ifdef USE_REAL_UINT128_T		#ifdef USE_REAL_UINT128_T
return (big_uint == UINT128_ZERO);		return (((uint128_t)le64dec(p + 8) << 64) \| le64dec(p));
#else		#else
return (big_uint.u128t_word0 == 0UL && big_uint.u128t_word1 == 0UL);		return ((uint128_t){
		.u128t_word0 = le64dec(p),
		.u128t_word1 = le64dec(p + 8),
		});
		#endif
		}

		static __inline void
		le128enc(void *pp, uint128_t u)
		{
		uint8_t *p = pp;

		#ifdef USE_REAL_UINT128_T
		le64enc(p, (uint64_t)(u & UINT64_MAX));
		le64enc(p + 8, (uint64_t)(u >> 64));
		#else
		le64enc(p, u.u128t_word0);
		le64enc(p + 8, u.u128t_word1);
#endif		#endif
}		}

#endif /* SYS_DEV_RANDOM_UINT128_H_INCLUDED */		#endif /* SYS_DEV_RANDOM_UINT128_H_INCLUDED */