MIPS: Rewrite csum_fold to plain C.
This isn't only short and easier to read and fully portable but also shrinks a Malta kernel's by 160 bytes. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
parent
eaa27f34e9
commit
d0f0f63ac1
|
@ -103,22 +103,16 @@ __wsum csum_partial_copy_nocheck(const void *src, void *dst,
|
|||
/*
|
||||
* Fold a partial checksum without adding pseudo headers
|
||||
*/
|
||||
static inline __sum16 csum_fold(__wsum sum)
|
||||
static inline __sum16 csum_fold(__wsum csum)
|
||||
{
|
||||
__asm__(
|
||||
" .set push # csum_fold\n"
|
||||
" .set noat \n"
|
||||
" sll $1, %0, 16 \n"
|
||||
" addu %0, $1 \n"
|
||||
" sltu $1, %0, $1 \n"
|
||||
" srl %0, %0, 16 \n"
|
||||
" addu %0, $1 \n"
|
||||
" xori %0, 0xffff \n"
|
||||
" .set pop"
|
||||
: "=r" (sum)
|
||||
: "0" (sum));
|
||||
u32 sum = (__force u32)csum;;
|
||||
|
||||
return (__force __sum16)sum;
|
||||
sum += (sum << 16);
|
||||
csum = (sum < csum);
|
||||
sum >>= 16;
|
||||
sum += csum;
|
||||
|
||||
return (__force __sum16)~sum;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
Loading…
Reference in a new issue