Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/sparc64/lib/ipcsum.S b/arch/sparc64/lib/ipcsum.S
new file mode 100644
index 0000000..58ca5b9
--- /dev/null
+++ b/arch/sparc64/lib/ipcsum.S
@@ -0,0 +1,34 @@
+ .text
+ .align 32
+ .globl ip_fast_csum
+ .type ip_fast_csum,#function
+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
+ .size ip_fast_csum, .-ip_fast_csum