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| author | Ingo Molnar <mingo@elte.hu> | 2009-01-11 02:42:53 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-11 02:42:53 +0100 |
| commit | 506c10f26c481b7f8ef27c1c79290f68989b2e9e (patch) | |
| tree | 03de82e812f00957aa6276dac2fe51c3358e88d7 /arch/sparc/lib/ipcsum.S | |
| parent | e1df957670aef74ffd9a4ad93e6d2c90bf6b4845 (diff) | |
| parent | c59765042f53a79a7a65585042ff463b69cb248c (diff) | |
Merge commit 'v2.6.29-rc1' into perfcounters/core
Conflicts:
include/linux/kernel_stat.h
Diffstat (limited to 'arch/sparc/lib/ipcsum.S')
| -rw-r--r-- | arch/sparc/lib/ipcsum.S | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/sparc/lib/ipcsum.S b/arch/sparc/lib/ipcsum.S new file mode 100644 index 00000000000..58ca5b9a877 --- /dev/null +++ b/arch/sparc/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 |