Re: [PATCH] powerpc/32: Remove one insn in __bswapdi2

[Christophe Leroy]

Le 10/08/2016 à 10:56, Gabriel Paubert a écrit :

On Fri, Aug 05, 2016 at 01:28:02PM +0200, Christophe Leroy wrote:

Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
---
 arch/powerpc/kernel/misc_32.S | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index e025230..e18055c 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -578,9 +578,8 @@ _GLOBAL(__bswapdi2)
        rlwimi  r9,r4,24,0,7
        rlwimi  r10,r3,24,0,7
        rlwimi  r9,r4,24,16,23
-       rlwimi  r10,r3,24,16,23
+       rlwimi  r4,r3,24,16,23
        mr      r3,r9
-       mr      r4,r10
        blr

Hmmm, are you sure that it works? rlwimi is a bit special since the
first operand is both an input and an output of the instruction.

Oops, you are right ...