From f786686d50a314f5974e8c9288c229e45733b551 Mon Sep 17 00:00:00 2001
From: Miodrag Milanovic <mmicko@gmail.com>
Date: Thu, 10 Jul 2025 12:28:04 +0200
Subject: [PATCH] Add warning for carry chain split

---
 himbaechel/uarch/gatemate/gatemate_util.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/himbaechel/uarch/gatemate/gatemate_util.h b/himbaechel/uarch/gatemate/gatemate_util.h
index e209e22c..8b5e3a7b 100644
--- a/himbaechel/uarch/gatemate/gatemate_util.h
+++ b/himbaechel/uarch/gatemate/gatemate_util.h
@@ -63,7 +63,7 @@ int extract_bits(const dict<KeyType, Property> &ct, const KeyType &key, int star
 }
 
 template <typename T>
-std::vector<std::vector<T>> splitNestedVector(const std::vector<std::vector<T>> &input, size_t maxSize = 32)
+std::vector<std::vector<T>> splitNestedVector(const std::vector<std::vector<T>> &input, size_t maxSize = 64)
 {
     std::vector<std::vector<T>> result;
 
@@ -73,6 +73,8 @@ std::vector<std::vector<T>> splitNestedVector(const std::vector<std::vector<T>>
             size_t end = std::min(i + maxSize, inner.size());
             result.emplace_back(inner.begin() + i, inner.begin() + end);
             i = end;
+            if (i < inner.size())
+                log_warning("Carry chain has been split, expect timing penalty.\n");
         }
     }