| #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. |
| */ |
| |
| extern inline unsigned int |
| csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, unsigned short len, |
| unsigned short proto, unsigned int sum) |
| { |
| int 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" ((ntohs(len) << 16) + (proto << 8))); |
| |
| return res; |
| } |
| |
| #endif |
