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powerpc: Align hot loops of some string functions

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Align the hot loops in our assembly implementation of strncpy(),
strncmp() and memchr().

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Anton Blanchard 2016-05-26 08:39:55 +10:00 committed by Michael Ellerman
parent 3ece16632b
commit 87a156fb18
1 changed files with 3 additions and 0 deletions
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3
arch/powerpc/lib/string.S
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@ -24,6 +24,7 @@ _GLOBAL(strncpy)
mtctr r5 mtctr r5
addi r6,r3,-1 addi r6,r3,-1
addi r4,r4,-1 addi r4,r4,-1
.balign 16
1: lbzu r0,1(r4) 1: lbzu r0,1(r4)
cmpwi 0,r0,0 cmpwi 0,r0,0
stbu r0,1(r6) stbu r0,1(r6)
@ -42,6 +43,7 @@ _GLOBAL(strncmp)
mtctr r5 mtctr r5
addi r5,r3,-1 addi r5,r3,-1
addi r4,r4,-1 addi r4,r4,-1
.balign 16
1: lbzu r3,1(r5) 1: lbzu r3,1(r5)
cmpwi 1,r3,0 cmpwi 1,r3,0
lbzu r0,1(r4) lbzu r0,1(r4)
@ -73,6 +75,7 @@ _GLOBAL(memchr)
beq- 2f beq- 2f
mtctr r5 mtctr r5
addi r3,r3,-1 addi r3,r3,-1
.balign 16
1: lbzu r0,1(r3) 1: lbzu r0,1(r3)
cmpw 0,r0,r4 cmpw 0,r0,r4
bdnzf 2,1b bdnzf 2,1b