summaryrefslogtreecommitdiff
path: root/arch/powerpc/lib
diff options
context:
space:
mode:
authorSteven Rostedt <rostedt@goodmis.org>2008-03-01 03:04:57 +1100
committerPaul Mackerras <paulus@samba.org>2008-04-07 10:03:03 +1000
commit0119536cd314ef95553604208c25bc35581f7f0a (patch)
treec196d0652c5bc6bee252d6628cfd76771b2e9131 /arch/powerpc/lib
parent4df4441e418c809f263939b9f371b67aca28a280 (diff)
[POWERPC] Add hand-coded assembly strcmp
We have an assembly version of strncmp for the bootwrapper, but not for the kernel, so we end up using the C version in the kernel. This takes the strncmp code from the bootup and copies it to the kernel proper, adding two instructions so it copes correctly with len==0. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/lib')
-rw-r--r--arch/powerpc/lib/string.S14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/lib/string.S b/arch/powerpc/lib/string.S
index c4c622d8e6ac..49eb1f1a2bb4 100644
--- a/arch/powerpc/lib/string.S
+++ b/arch/powerpc/lib/string.S
@@ -75,6 +75,20 @@ _GLOBAL(strcmp)
beq 1b
blr
+_GLOBAL(strncmp)
+ PPC_LCMPI r5,0
+ beqlr
+ mtctr r5
+ addi r5,r3,-1
+ addi r4,r4,-1
+1: lbzu r3,1(r5)
+ cmpwi 1,r3,0
+ lbzu r0,1(r4)
+ subf. r3,r0,r3
+ beqlr 1
+ bdnzt eq,1b
+ blr
+
_GLOBAL(strlen)
addi r4,r3,-1
1: lbzu r0,1(r4)