summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/lib
diff options
context:
space:
mode:
authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>2017-03-28 01:07:40 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2017-08-17 23:04:35 +1000
commit694fc88ce271fd48f7939c032c1247fef81db57f (patch)
tree13473e23faddb19b97ef49d8a89cee65a584e8f1 /arch/powerpc/lib
parent00e7c259e9c44f414ead5fc9bb3c459d8235045c (diff)
downloadlinux-stable-694fc88ce271fd48f7939c032c1247fef81db57f.tar.gz
linux-stable-694fc88ce271fd48f7939c032c1247fef81db57f.tar.bz2
linux-stable-694fc88ce271fd48f7939c032c1247fef81db57f.zip
powerpc/string: Implement optimized memset variants
Based on Matthew Wilcox's patches for other architectures. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/lib')
-rw-r--r--arch/powerpc/lib/mem_64.S19
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
index 85fa9869aec5..ec531de99996 100644
--- a/arch/powerpc/lib/mem_64.S
+++ b/arch/powerpc/lib/mem_64.S
@@ -13,6 +13,23 @@
#include <asm/ppc_asm.h>
#include <asm/export.h>
+_GLOBAL(__memset16)
+ rlwimi r4,r4,16,0,15
+ /* fall through */
+
+_GLOBAL(__memset32)
+ rldimi r4,r4,32,0
+ /* fall through */
+
+_GLOBAL(__memset64)
+ neg r0,r3
+ andi. r0,r0,7
+ cmplw cr1,r5,r0
+ b .Lms
+EXPORT_SYMBOL(__memset16)
+EXPORT_SYMBOL(__memset32)
+EXPORT_SYMBOL(__memset64)
+
_GLOBAL(memset)
neg r0,r3
rlwimi r4,r4,8,16,23
@@ -20,7 +37,7 @@ _GLOBAL(memset)
rlwimi r4,r4,16,0,15
cmplw cr1,r5,r0 /* do we get that far? */
rldimi r4,r4,32,0
- PPC_MTOCRF(1,r0)
+.Lms: PPC_MTOCRF(1,r0)
mr r6,r3
blt cr1,8f
beq+ 3f /* if already 8-byte aligned */