in_cksum_arm.h File Reference

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>

Include dependency graph for in_cksum_arm.h:

Go to the source code of this file.

Macros
#define	ADD64
#define	ADD32
#define	ADD16
#define	ADD8
#define	ADD4
#define	REDUCE
#define	ADDCARRY   {if (sum > 0xffff) sum -= 0xffff;}
#define	ROL   {sum = sum << 8;} /* depends on recent REDUCE */
#define	ADDBYTE   {ROL; sum += (*w << 8); byte_swapped ^= 1;}
#define	ADDSHORT   {sum += *(u_short *)w;}
#define	ADVANCE(n)   {w += n; mlen -= n;}
#define	ADVANCEML(n)   {mlen -= n;}

Functions
int	in_cksum (struct mbuf *m, int len)
int	in4_cksum (struct mbuf *m, u_int8_t nxt, int off, int len)

Macro Definition Documentation

ADD16

#define ADD16

Value:

__asm __volatile("      \n\     ldmia   %0!, {%2, %3, %4, %5}   \n\     adds    %1,%7,%2; adcs %1,%1,%3 \n\     adcs    %1,%1,%4; adcs %1,%1,%5 \n\     adcs    %1,%1,#0\n"             \
        : "=r" (w), "=r" (sum), "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4) \
        : "0" (w), "r" (sum)    \
        : "cc")

ADD32

#define ADD32

Value:

__asm __volatile("      \n\     ldmia   %0!, {%2, %3, %4, %5}   \n\     adds    %1,%7,%2; adcs %1,%1,%3 \n\     adcs    %1,%1,%4; adcs %1,%1,%5 \n\     ldmia   %0!, {%2, %3, %4, %5}   \n\     adcs    %1,%1,%2; adcs %1,%1,%3 \n\     adcs    %1,%1,%4; adcs %1,%1,%5 \n\     adcs    %1,%1,#0\n"             \
        : "=r" (w), "=r" (sum), "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4) \
        : "0" (w), "r" (sum)    \
        : "cc")

ADD4

#define ADD4

Value:

__asm __volatile("      \n\     ldr     %2,[%0],#4              \n\     adds    %1,%4,%2                \n\     adcs    %1,%1,#0\n"             \
        : "=r" (w), "=r" (sum), "=&r" (tmp1) \
        : "0" (w), "r" (sum)            \
        : "cc")

ADD64

#define ADD64

Value:

__asm __volatile("      \n\     ldmia   %0!, {%2, %3, %4, %5}   \n\     adds    %1,%7,%2; adcs %1,%1,%3 \n\     adcs    %1,%1,%4; adcs %1,%1,%5 \n\     ldmia   %0!, {%2, %3, %4, %5}   \n\     adcs    %1,%1,%2; adcs %1,%1,%3 \n\     adcs    %1,%1,%4; adcs %1,%1,%5 \n\     ldmia   %0!, {%2, %3, %4, %5}   \n\     adcs    %1,%1,%2; adcs %1,%1,%3 \n\     adcs    %1,%1,%4; adcs %1,%1,%5 \n\     ldmia   %0!, {%2, %3, %4, %5}   \n\     adcs    %1,%1,%2; adcs %1,%1,%3 \n\     adcs    %1,%1,%4; adcs %1,%1,%5 \n\     adcs    %1,%1,#0\n"             \
        : "=r" (w), "=r" (sum), "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4) \
        : "0" (w), "r" (sum)    \
        : "cc")

ADD8

#define ADD8

Value:

__asm __volatile("      \n\     ldmia   %0!, {%2, %3}           \n\     adds    %1,%5,%2; adcs %1,%1,%3 \n\     adcs    %1,%1,#0\n"             \
        : "=r" (w), "=r" (sum), "=&r" (tmp1), "=&r" (tmp2)      \
        : "0" (w), "r" (sum)            \
        : "cc" )

REDUCE

#define REDUCE

Value:

__asm __volatile("      \n\     mov     %2, #0x00ff             \n\     orr     %2, %2, #0xff00         \n\     and     %2, %0, %2              \n\     add     %0, %2, %0, lsr #16\n"  \
        : "=r" (sum)                    \
        : "0" (sum), "r" (tmp1))