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[releases.git] / x86 / um / asm / checksum_32.h
1 /*
2  * Licensed under the GPL
3  */
4
5 #ifndef __UM_SYSDEP_CHECKSUM_H
6 #define __UM_SYSDEP_CHECKSUM_H
7
8 static inline __sum16 ip_compute_csum(const void *buff, int len)
9 {
10     return csum_fold (csum_partial(buff, len, 0));
11 }
12
13 #define _HAVE_ARCH_IPV6_CSUM
14 static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
15                                           const struct in6_addr *daddr,
16                                           __u32 len, __u8 proto,
17                                           __wsum sum)
18 {
19         __asm__(
20                 "addl 0(%1), %0         ;\n"
21                 "adcl 4(%1), %0         ;\n"
22                 "adcl 8(%1), %0         ;\n"
23                 "adcl 12(%1), %0        ;\n"
24                 "adcl 0(%2), %0         ;\n"
25                 "adcl 4(%2), %0         ;\n"
26                 "adcl 8(%2), %0         ;\n"
27                 "adcl 12(%2), %0        ;\n"
28                 "adcl %3, %0            ;\n"
29                 "adcl %4, %0            ;\n"
30                 "adcl $0, %0            ;\n"
31                 : "=&r" (sum)
32                 : "r" (saddr), "r" (daddr),
33                   "r"(htonl(len)), "r"(htonl(proto)), "0"(sum));
34
35         return csum_fold(sum);
36 }
37
38 #endif