| #ifndef _CRIS_ARCH_CHECKSUM_H |
| #define _CRIS_ARCH_CHECKSUM_H |
| |
| /* Checksum some values used in TCP/UDP headers. |
| * |
| * The gain by doing this in asm is that C will not generate carry-additions |
| * for the 32-bit components of the checksum, so otherwise we would have had |
| * to split all of those into 16-bit components, then add. |
| */ |
| |
| static inline __wsum |
| csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, |
| unsigned short proto, __wsum sum) |
| { |
| __wsum res; |
| __asm__ ("add.d %2, %0\n\t" |
| "ax\n\t" |
| "add.d %3, %0\n\t" |
| "ax\n\t" |
| "add.d %4, %0\n\t" |
| "ax\n\t" |
| "addq 0, %0\n" |
| : "=r" (res) |
| : "0" (sum), "r" (daddr), "r" (saddr), "r" ((len + proto) << 8)); |
| |
| return res; |
| } |
| |
| #endif |