[PATCH v2 1/2] powerpc: net: filter: fix DIVWU instruction opcode
Vladimir Murzin
murzin.v at gmail.com
Sat Sep 28 18:22:00 EST 2013
Currently DIVWU stands for *signed* divw opcode:
7d 2a 4b 96 divwu r9,r10,r9
7d 2a 4b d6 divw r9,r10,r9
Use the *unsigned* divw opcode for DIVWU.
Suggested-by: Vassili Karpov <av1474 at comtv.ru>
Reviewed-by: Vassili Karpov <av1474 at comtv.ru>
Signed-off-by: Vladimir Murzin <murzin.v at gmail.com>
Acked-by: Matt Evans <matt at ozlabs.org>
---
Changelog
v1->v2
Added credit to Vassili Karpov (malc) who kindly reviewed generated assembly
[1] and highlighted usage of signed division.
Note: temporary, for technical reason, he's not able to receive email.
[1]http://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg71635.html
arch/powerpc/include/asm/ppc-opcode.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index eccfc16..0a4a683 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -171,7 +171,7 @@
#define PPC_INST_MULLW 0x7c0001d6
#define PPC_INST_MULHWU 0x7c000016
#define PPC_INST_MULLI 0x1c000000
-#define PPC_INST_DIVWU 0x7c0003d6
+#define PPC_INST_DIVWU 0x7c000396
#define PPC_INST_RLWINM 0x54000000
#define PPC_INST_RLDICR 0x78000004
#define PPC_INST_SLW 0x7c000030
--
1.8.1.5
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