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powerpc/64: Remove static branch hints from memset()

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Static branch hints override dynamic branch prediction on recent
POWER CPUs. We should only use them when we are overwhelmingly
sure of the direction.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Anton Blanchard 2018-08-21 11:04:12 +10:00 • committed by Michael Ellerman
parent ba2dd8a26b
commit be54c1216f
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/lib/mem_64.S
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@ -40,7 +40,7 @@ _GLOBAL(memset)
.Lms: PPC_MTOCRF(1,r0)
mr r6,r3
blt cr1,8f
beq+ 3f /* if already 8-byte aligned */
beq 3f /* if already 8-byte aligned */
subf r5,r0,r5
bf 31,1f
stb r4,0(r6)
@ -85,7 +85,7 @@ _GLOBAL(memset)
addi r6,r6,8
8: cmpwi r5,0
PPC_MTOCRF(1,r5)
beqlr+
beqlr
bf 29,9f
stw r4,0(r6)
addi r6,r6,4