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linux-next/arch/x86/um/asm/checksum_64.h
Al Viro 4301785c7c um/x86: merge 32 and 64bit variants of checksum.h
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
2012-10-09 22:28:16 +02:00

20 lines
361 B
C

/*
* Licensed under the GPL
*/
#ifndef __UM_SYSDEP_CHECKSUM_H
#define __UM_SYSDEP_CHECKSUM_H
static inline unsigned add32_with_carry(unsigned a, unsigned b)
{
asm("addl %2,%0\n\t"
"adcl $0,%0"
: "=r" (a)
: "0" (a), "r" (b));
return a;
}
extern __sum16 ip_compute_csum(const void *buff, int len);
#endif