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-rw-r--r--opcodes/i386-dis.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c
index b5cc638..c24c656 100644
--- a/opcodes/i386-dis.c
+++ b/opcodes/i386-dis.c
@@ -3191,8 +3191,10 @@ OP_E (int bytemode, int sizeflag)
{
havesib = 1;
FETCH_DATA (the_info, codep + 1);
- scale = (*codep >> 6) & 3;
index = (*codep >> 3) & 7;
+ if (index != 0x4)
+ /* When INDEX == 0x4, scale is ignored. */
+ scale = (*codep >> 6) & 3;
base = *codep & 7;
USED_REX (REX_EXTY);
USED_REX (REX_EXTZ);