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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/sparc/lib/ipcsum.S | |
| parent | Initial commit. (diff) | |
| download | linux-upstream/4.19.249.tar.xz linux-upstream/4.19.249.zip | |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sparc/lib/ipcsum.S')
| -rw-r--r-- | arch/sparc/lib/ipcsum.S | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/sparc/lib/ipcsum.S b/arch/sparc/lib/ipcsum.S new file mode 100644 index 000000000..531d89c9d --- /dev/null +++ b/arch/sparc/lib/ipcsum.S @@ -0,0 +1,36 @@ +/* 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) |