diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-31 04:23:31 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-31 04:23:31 +0300 |
| commit | 6de71484cf9561edb45224f659a9db38b6056d5e (patch) | |
| tree | 588fe6f7c98147b805085503c863d371e2fa497e /arch/sparc/lib/ipcsum.S | |
| parent | 1dff81f20cd55ffa5a8ee984da70ce0b99d29606 (diff) | |
| parent | e3c6d4ee545e427b55882d97d3b663c6411645fe (diff) | |
| download | linux-6de71484cf9561edb45224f659a9db38b6056d5e.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (98 commits)
sparc: move select of ARCH_SUPPORTS_MSI
sparc: drop SUN_IO
sparc: unify sections.h
sparc: use .data.init_task section for init_thread_union
sparc: fix array overrun check in of_device_64.c
sparc: unify module.c
sparc64: prepare module_64.c for unification
sparc64: use bit neutral Elf symbols
sparc: unify module.h
sparc: introduce CONFIG_BITS
sparc: fix hardirq.h removal fallout
sparc64: do not export pus_fs_struct
sparc: use sparc64 version of scatterlist.h
sparc: Commonize memcmp assembler.
sparc: Unify strlen assembler.
sparc: Add asm/asm.h
sparc: Kill memcmp_32.S code which has been ifdef'd out for centuries.
sparc: replace for_each_cpu_mask_nr with for_each_cpu
sparc: fix sparse warnings in irq_32.c
sparc: add include guards to kernel.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 000000000000..58ca5b9a8778 --- /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 |