From 3ae20774096ddb42ea03142d0c55f9564da4ba50 Mon Sep 17 00:00:00 2001
From: Oxore <oxore@protonmail.com>
Date: Sun, 18 Feb 2024 22:01:29 +0300
Subject: Fix runtime error in regmask printing routine

---
 src/disasm.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/disasm.cpp b/src/disasm.cpp
index be4a9a8..3a27400 100644
--- a/src/disasm.cpp
+++ b/src/disasm.cpp
@@ -1791,7 +1791,9 @@ static size_t snprint_reg_mask(
     size_t span = 0;
     // 17-th bit used to close the span with 0 value unconditionally
     for (int i = 0; i < 17; i++) {
-        const uint32_t mask = 1 << (arg_type == ArgType::kRegMaskPredecrement ? (15 - i) : i);
+        const uint32_t mask = (i <= 15)
+            ? (1 << ((arg_type == ArgType::kRegMaskPredecrement) ? (15 - i) : i))
+            : 0;
         const bool hit = regmask & mask;
         const bool span_open = hit && span == 0;
         const bool span_closed = !hit && span > 1;
-- 
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