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ipv6: Optimize ipv6_addr_is_ll_all_{nodes,routers}().

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Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki / 吉藤英明 2013-01-20 07:38:52 +00:00 committed by David S. Miller
parent 9d10077400
commit d1641565f6
1 changed files with 10 additions and 0 deletions
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10
include/net/addrconf.h
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@ -288,16 +288,26 @@ static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
{ {
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
__u64 *p = (__u64 *)addr;
return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
#else
return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
addr->s6_addr32[1] | addr->s6_addr32[2] | addr->s6_addr32[1] | addr->s6_addr32[2] |
(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
#endif
} }
static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
{ {
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
__u64 *p = (__u64 *)addr;
return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
#else
return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
addr->s6_addr32[1] | addr->s6_addr32[2] | addr->s6_addr32[1] | addr->s6_addr32[2] |
(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
#endif
} }
static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)