| From | Christophe Leroy <> | Subject | [PATCH v2 24/25] powerpc32: small optimisation in flush_icache_range() | Date | Tue, 22 Sep 2015 18:51:17 +0200 (CEST) |
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Inlining of _dcache_range() functions has shown that the compiler does the same thing a bit better with one insn less
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> --- New in v2
arch/powerpc/kernel/misc_32.S | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S index 1728f61..1597424 100644 --- a/arch/powerpc/kernel/misc_32.S +++ b/arch/powerpc/kernel/misc_32.S @@ -348,10 +348,9 @@ BEGIN_FTR_SECTION PURGE_PREFETCHED_INS blr /* for 601, do nothing */ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE) - li r5,L1_CACHE_BYTES-1 - andc r3,r3,r5 + rlwinm r3,r3,0,0,31 - L1_CACHE_SHIFT subf r4,r3,r4 - add r4,r4,r5 + addi r4,r4,L1_CACHE_BYTES - 1 srwi. r4,r4,L1_CACHE_SHIFT beqlr mtctr r4 -- 2.1.0
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