From b693947834b183434c428c2af6ee670b2f6206bb Mon Sep 17 00:00:00 2001
From: sdjasj <1594576288@qq.com>
Date: Wed, 23 Apr 2025 05:58:57 +0000
Subject: [PATCH] fix udivmod crashes when operand value exceeds logical width

---
 backends/cxxrtl/runtime/cxxrtl/cxxrtl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backends/cxxrtl/runtime/cxxrtl/cxxrtl.h b/backends/cxxrtl/runtime/cxxrtl/cxxrtl.h
index 37c84895f..886d033cb 100644
--- a/backends/cxxrtl/runtime/cxxrtl/cxxrtl.h
+++ b/backends/cxxrtl/runtime/cxxrtl/cxxrtl.h
@@ -2010,7 +2010,7 @@ std::pair<value<BitsY>, value<BitsY>> divmod_uu(const value<BitsA> &a, const val
 	value<Bits> quotient;
 	value<Bits> remainder;
 	value<Bits> dividend = a.template zext<Bits>();
-	value<Bits> divisor = b.template zext<Bits>();
+	value<Bits> divisor  = b.template trunc<BitsB>().template zext<Bits>();
 	std::tie(quotient, remainder) = dividend.udivmod(divisor);
 	return {quotient.template trunc<BitsY>(), remainder.template trunc<BitsY>()};
 }