diff options
Diffstat (limited to 'arch/powerpc/lib/checksum_64.S')
| -rw-r--r-- | arch/powerpc/lib/checksum_64.S | 31 |
1 files changed, 2 insertions, 29 deletions
diff --git a/arch/powerpc/lib/checksum_64.S b/arch/powerpc/lib/checksum_64.S index f3ef35436612..8e6e51016cc5 100644 --- a/arch/powerpc/lib/checksum_64.S +++ b/arch/powerpc/lib/checksum_64.S @@ -18,39 +18,12 @@ #include <asm/ppc_asm.h> /* - * ip_fast_csum(r3=buf, r4=len) -- Optimized for IP header - * len is in words and is always >= 5. - * - * In practice len == 5, but this is not guaranteed. So this code does not - * attempt to use doubleword instructions. - */ -_GLOBAL(ip_fast_csum) - lwz r0,0(r3) - lwzu r5,4(r3) - addic. r4,r4,-2 - addc r0,r0,r5 - mtctr r4 - blelr- -1: lwzu r4,4(r3) - adde r0,r0,r4 - bdnz 1b - addze r0,r0 /* add in final carry */ - rldicl r4,r0,32,0 /* fold two 32-bit halves together */ - add r0,r0,r4 - srdi r0,r0,32 - rlwinm r3,r0,16,0,31 /* fold two halves together */ - add r3,r0,r3 - not r3,r3 - srwi r3,r3,16 - blr - -/* * Computes the checksum of a memory block at buff, length len, * and adds in "sum" (32-bit). * - * csum_partial(r3=buff, r4=len, r5=sum) + * __csum_partial(r3=buff, r4=len, r5=sum) */ -_GLOBAL(csum_partial) +_GLOBAL(__csum_partial) addic r0,r5,0 /* clear carry */ srdi. r6,r4,3 /* less than 8 bytes? */ |