threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
37 lines
707 B
ArmAsm
37 lines
707 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#include <linux/linkage.h>
|
|
#include <asm/export.h>
|
|
|
|
.text
|
|
ENTRY(ip_fast_csum) /* %o0 = iph, %o1 = ihl */
|
|
sub %o1, 4, %g7
|
|
lduw [%o0 + 0x00], %o2
|
|
lduw [%o0 + 0x04], %g2
|
|
lduw [%o0 + 0x08], %g3
|
|
addcc %g2, %o2, %o2
|
|
lduw [%o0 + 0x0c], %g2
|
|
addccc %g3, %o2, %o2
|
|
lduw [%o0 + 0x10], %g3
|
|
|
|
addccc %g2, %o2, %o2
|
|
addc %o2, %g0, %o2
|
|
1: addcc %g3, %o2, %o2
|
|
add %o0, 4, %o0
|
|
addccc %o2, %g0, %o2
|
|
subcc %g7, 1, %g7
|
|
be,a,pt %icc, 2f
|
|
sll %o2, 16, %g2
|
|
|
|
lduw [%o0 + 0x10], %g3
|
|
ba,pt %xcc, 1b
|
|
nop
|
|
2: addcc %o2, %g2, %g2
|
|
srl %g2, 16, %o2
|
|
addc %o2, %g0, %o2
|
|
xnor %g0, %o2, %o2
|
|
set 0xffff, %o1
|
|
retl
|
|
and %o2, %o1, %o0
|
|
ENDPROC(ip_fast_csum)
|
|
EXPORT_SYMBOL(ip_fast_csum)
|