From 4834d196f73c7899e5b243382cb98ac71e69b6d1 Mon Sep 17 00:00:00 2001
From: Rot127 <45763064+Rot127@users.noreply.github.com>
Date: Mon, 23 Oct 2023 13:52:35 +0000
Subject: [PATCH] Fix off by one error. (#2180)

---
 arch/ARM/ARMMapping.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/ARM/ARMMapping.c b/arch/ARM/ARMMapping.c
index 57032afec2..aaeec587fd 100644
--- a/arch/ARM/ARMMapping.c
+++ b/arch/ARM/ARMMapping.c
@@ -1369,7 +1369,7 @@ static void add_cs_detail_general(MCInst *MI, arm_op_group op_group,
 		unsigned int imm3 = MCInst_getOpVal(MI, OpNum + 2);
 		unsigned ShOff = ARM_AM_getAM2Offset(imm3);
 		ARM_AM_AddrOpc subtracted = ARM_AM_getAM2Op(imm3);
-		if (!MCOperand_getReg(MCInst_getOperand(MI, OpNum + 2)) &&
+		if (!MCOperand_getReg(MCInst_getOperand(MI, OpNum + 1)) &&
 		    ShOff) {
 			ARM_get_detail_op(MI, 0)->shift.type =
 				(arm_shifter)subtracted;