diff options
Diffstat (limited to 'sys/dev/random/uint128.h')
| -rw-r--r-- | sys/dev/random/uint128.h | 43 |
1 files changed, 22 insertions, 21 deletions
diff --git a/sys/dev/random/uint128.h b/sys/dev/random/uint128.h index b2cc1e0..22380b2 100644 --- a/sys/dev/random/uint128.h +++ b/sys/dev/random/uint128.h @@ -1,5 +1,5 @@ /*- - * Copyright (c) 2014 Mark R V Murray + * Copyright (c) 2015 Mark R V Murray * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -27,7 +27,7 @@ */ #ifndef SYS_DEV_RANDOM_UINT128_H_INCLUDED -#define SYS_DEV_RANDOM_UINT128_H_INCLUDED +#define SYS_DEV_RANDOM_UINT128_H_INCLUDED /* This whole thing is a crock :-( * @@ -35,40 +35,41 @@ */ #ifdef __SIZEOF_INT128__ -typedef __uint128_t uint128_t; -#else -typedef uint64_t uint128_t[2]; +#define USE_REAL_UINT128_T #endif -static __inline void -uint128_clear(uint128_t *big_uint) -{ -#ifdef __SIZEOF_INT128__ - (*big_uint) = 0ULL; +#ifdef USE_REAL_UINT128_T +typedef __uint128_t uint128_t; +#define UINT128_ZERO 0ULL #else - (*big_uint)[0] = (*big_uint)[1] = 0UL; +typedef struct { + /* Ignore endianness */ + uint64_t u128t_word0; + uint64_t u128t_word1; +} uint128_t; +static const uint128_t very_long_zero = {0UL,0UL}; +#define UINT128_ZERO very_long_zero #endif -} static __inline void -uint128_increment(uint128_t *big_uint) +uint128_increment(uint128_t *big_uintp) { -#ifdef __SIZEOF_INT128__ - (*big_uint)++; +#ifdef USE_REAL_UINT128_T + (*big_uintp)++; #else - (*big_uint)[0]++; - if ((*big_uint)[0] == 0UL) - (*big_uint)[1]++; + big_uintp->u128t_word0++; + if (big_uintp->u128t_word0 == 0UL) + big_uintp->u128t_word1++; #endif } static __inline int uint128_is_zero(uint128_t big_uint) { -#ifdef __SIZEOF_INT128__ - return (big_uint == 0ULL); +#ifdef USE_REAL_UINT128_T + return (big_uint == UINT128_ZERO); #else - return (big_uint[0] == 0UL && big_uint[1] == 0UL); + return (big_uint.u128t_word0 == 0UL && big_uint.u128t_word1 == 0UL); #endif } |
