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powerpc/64: Align hot loops of memset() and backwards_memcpy()

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Align the hot loops in our assembly implementation of memset()
and backwards_memcpy().

backwards_memcpy() is called from tcp_v4_rcv(), so we might
want to optimise this a little more.

Signed-off-by: Anton Blanchard <anton@samba.org>
Reviewed-by: Nick Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Anton Blanchard 2016-08-04 16:53:22 +10:00 committed by Michael Ellerman
parent e0319829a9
commit 12ab11a2c0
1 changed files with 2 additions and 0 deletions
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arch/powerpc/lib/mem_64.S
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@ -37,6 +37,7 @@ _GLOBAL(memset)
clrldi r5,r5,58
mtctr r0
beq 5f
.balign 16
4: std r4,0(r6)
std r4,8(r6)
std r4,16(r6)
@ -90,6 +91,7 @@ _GLOBAL(backwards_memcpy)
andi. r0,r6,3
mtctr r7
bne 5f
.balign 16
1: lwz r7,-4(r4)
lwzu r8,-8(r4)
stw r7,-4(r6)