[POWERPC] Use mtocrf instruction in asm when CONFIG_POWER4_ONLY=y
mtocrf is a faster single-field mtcrf (move to condition register
fields) instruction available in POWER4 and later processors. It can
make quite a difference in performance on some implementations, so use
it for CONFIG_POWER4_ONLY builds.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
index 68df202..11ce045 100644
--- a/arch/powerpc/lib/mem_64.S
+++ b/arch/powerpc/lib/mem_64.S
@@ -19,7 +19,7 @@
rlwimi r4,r4,16,0,15
cmplw cr1,r5,r0 /* do we get that far? */
rldimi r4,r4,32,0
- mtcrf 1,r0
+ PPC_MTOCRF 1,r0
mr r6,r3
blt cr1,8f
beq+ 3f /* if already 8-byte aligned */
@@ -49,7 +49,7 @@
bdnz 4b
5: srwi. r0,r5,3
clrlwi r5,r5,29
- mtcrf 1,r0
+ PPC_MTOCRF 1,r0
beq 8f
bf 29,6f
std r4,0(r6)
@@ -65,7 +65,7 @@
std r4,0(r6)
addi r6,r6,8
8: cmpwi r5,0
- mtcrf 1,r5
+ PPC_MTOCRF 1,r5
beqlr+
bf 29,9f
stw r4,0(r6)