[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/copyuser_64.S b/arch/powerpc/lib/copyuser_64.S
index a6b54cb..25ec537 100644
--- a/arch/powerpc/lib/copyuser_64.S
+++ b/arch/powerpc/lib/copyuser_64.S
@@ -24,7 +24,7 @@
dcbt 0,r4
beq .Lcopy_page_4K
andi. r6,r6,7
- mtcrf 0x01,r5
+ PPC_MTOCRF 0x01,r5
blt cr1,.Lshort_copy
bne .Ldst_unaligned
.Ldst_aligned:
@@ -135,7 +135,7 @@
b .Ldo_tail
.Ldst_unaligned:
- mtcrf 0x01,r6 /* put #bytes to 8B bdry into cr7 */
+ PPC_MTOCRF 0x01,r6 /* put #bytes to 8B bdry into cr7 */
subf r5,r6,r5
li r7,0
cmpldi r1,r5,16
@@ -150,7 +150,7 @@
2: bf cr7*4+1,3f
37: lwzx r0,r7,r4
83: stwx r0,r7,r3
-3: mtcrf 0x01,r5
+3: PPC_MTOCRF 0x01,r5
add r4,r6,r4
add r3,r6,r3
b .Ldst_aligned