| #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 unsigned int |
| csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, unsigned short len, |
| unsigned short proto, unsigned int sum) |
| __asm__ ("add.d %2, %0\n\t" |
| : "0" (sum), "r" (daddr), "r" (saddr), "r" ((ntohs(len) << 16) + (proto << 8))); |