7 files changed, 15 insertions, 15 deletions
diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp
index 340434888..a03a0989b 100644
--- a/src/blockchain_db/lmdb/db_lmdb.cpp
+++ b/src/blockchain_db/lmdb/db_lmdb.cpp
@@ -770,8 +770,8 @@ void BlockchainLMDB::add_block(const block& blk, size_t block_weight, uint64_t l
   bi.bi_timestamp = blk.timestamp;
   bi.bi_coins = coins_generated;
   bi.bi_weight = block_weight;
-  bi.bi_diff_hi = (cumulative_difficulty >> 64).convert_to<uint64_t>();
-  bi.bi_diff_lo = (cumulative_difficulty << 64 >> 64).convert_to<uint64_t>();
+  bi.bi_diff_hi = ((cumulative_difficulty >> 64) & 0xffffffffffffffff).convert_to<uint64_t>();
+  bi.bi_diff_lo = (cumulative_difficulty & 0xffffffffffffffff).convert_to<uint64_t>();
   bi.bi_hash = blk_hash;
   bi.bi_cum_rct = num_rct_outs;
   if (blk.major_version >= 4)
diff --git a/src/cryptonote_basic/cryptonote_boost_serialization.h b/src/cryptonote_basic/cryptonote_boost_serialization.h
index 3dd98f0c6..79ce610a9 100644
--- a/src/cryptonote_basic/cryptonote_boost_serialization.h
+++ b/src/cryptonote_basic/cryptonote_boost_serialization.h
@@ -365,11 +365,11 @@ namespace boost
     else
     {
       // store high part
-      cryptonote::difficulty_type x_ = x >> 64;
+      cryptonote::difficulty_type x_ = (x >> 64) & 0xffffffffffffffff;
       uint64_t v = x_.convert_to<uint64_t>();
       a & v;
       // store low part
-      x_ = x << 64 >> 64;
+      x_ = x & 0xffffffffffffffff;
       v = x_.convert_to<uint64_t>();
       a & v;
     }
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index f733efb2f..3ef20fd0b 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -2324,8 +2324,8 @@ bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qbloc
   if (result)
   {
     cryptonote::difficulty_type wide_cumulative_difficulty = m_db->get_block_cumulative_difficulty(resp.total_height - 1);
-    resp.cumulative_difficulty = (wide_cumulative_difficulty << 64 >> 64).convert_to<uint64_t>();
-    resp.cumulative_difficulty_top64 = (wide_cumulative_difficulty >> 64).convert_to<uint64_t>();
+    resp.cumulative_difficulty = (wide_cumulative_difficulty & 0xffffffffffffffff).convert_to<uint64_t>();
+    resp.cumulative_difficulty_top64 = ((wide_cumulative_difficulty >> 64) & 0xffffffffffffffff).convert_to<uint64_t>();
   }
 
   return result;
diff --git a/src/cryptonote_protocol/cryptonote_protocol_handler.inl b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
index 7adca3158..8958af7c7 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_handler.inl
+++ b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
@@ -410,8 +410,8 @@ namespace cryptonote
     m_core.get_blockchain_top(hshd.current_height, hshd.top_id);
     hshd.top_version = m_core.get_ideal_hard_fork_version(hshd.current_height);
     difficulty_type wide_cumulative_difficulty = m_core.get_block_cumulative_difficulty(hshd.current_height);
-    hshd.cumulative_difficulty = (wide_cumulative_difficulty << 64 >> 64).convert_to<uint64_t>();
-    hshd.cumulative_difficulty_top64 = (wide_cumulative_difficulty >> 64).convert_to<uint64_t>();
+    hshd.cumulative_difficulty = (wide_cumulative_difficulty & 0xffffffffffffffff).convert_to<uint64_t>();
+    hshd.cumulative_difficulty_top64 = ((wide_cumulative_difficulty >> 64) & 0xffffffffffffffff).convert_to<uint64_t>();
     hshd.current_height +=1;
     hshd.pruning_seed = m_core.get_blockchain_pruning_seed();
     return true;
diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index c41fb37d8..0ad7e59e9 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -74,9 +74,9 @@ namespace
 
   void store_difficulty(cryptonote::difficulty_type difficulty, uint64_t &sdiff, std::string &swdiff, uint64_t &stop64)
   {
-    sdiff = (difficulty << 64 >> 64).convert_to<uint64_t>();
+    sdiff = (difficulty & 0xffffffffffffffff).convert_to<uint64_t>();
     swdiff = cryptonote::hex(difficulty);
-    stop64 = (difficulty >> 64).convert_to<uint64_t>();
+    stop64 = ((difficulty >> 64) & 0xffffffffffffffff).convert_to<uint64_t>();
   }
 }
 
diff --git a/src/rpc/daemon_handler.cpp b/src/rpc/daemon_handler.cpp
index 7c8953930..c997f6f47 100644
--- a/src/rpc/daemon_handler.cpp
+++ b/src/rpc/daemon_handler.cpp
@@ -437,7 +437,7 @@ namespace rpc
     auto& chain = m_core.get_blockchain_storage();
 
     res.info.wide_difficulty = chain.get_difficulty_for_next_block();
-    res.info.difficulty = (res.info.wide_difficulty << 64 >> 64).convert_to<uint64_t>();
+    res.info.difficulty = (res.info.wide_difficulty & 0xffffffffffffffff).convert_to<uint64_t>();
 
     res.info.target = chain.get_difficulty_target();
 
@@ -459,7 +459,7 @@ namespace rpc
     res.info.testnet = m_core.get_nettype() == TESTNET;
     res.info.stagenet = m_core.get_nettype() == STAGENET;
     res.info.wide_cumulative_difficulty = m_core.get_blockchain_storage().get_db().get_block_cumulative_difficulty(res.info.height - 1);
-    res.info.cumulative_difficulty = (res.info.wide_cumulative_difficulty << 64 >> 64).convert_to<uint64_t>();
+    res.info.cumulative_difficulty = (res.info.wide_cumulative_difficulty & 0xffffffffffffffff).convert_to<uint64_t>();
     res.info.block_size_limit = res.info.block_weight_limit = m_core.get_blockchain_storage().get_current_cumulative_block_weight_limit();
     res.info.block_size_median = res.info.block_weight_median = m_core.get_blockchain_storage().get_current_cumulative_block_weight_median();
     res.info.start_time = (uint64_t)m_core.get_start_time();
@@ -829,7 +829,7 @@ namespace rpc
     }
 
     header.wide_difficulty = m_core.get_blockchain_storage().block_difficulty(header.height);
-    header.difficulty = (header.wide_difficulty << 64 >> 64).convert_to<uint64_t>();
+    header.difficulty = (header.wide_difficulty & 0xffffffffffffffff).convert_to<uint64_t>();
 
     return true;
   }
diff --git a/src/serialization/difficulty_type.h b/src/serialization/difficulty_type.h
index e32e24b78..c551095f9 100644
--- a/src/serialization/difficulty_type.h
+++ b/src/serialization/difficulty_type.h
@@ -54,8 +54,8 @@ inline bool do_serialize(Archive<true>& ar, cryptonote::difficulty_type &diff)
 {
   if (!ar.stream().good())
     return false;
-  const uint64_t hi = (diff >> 64).convert_to<uint64_t>();
-  const uint64_t lo = (diff << 64 >> 64).convert_to<uint64_t>();
+  const uint64_t hi = ((diff >> 64) & 0xffffffffffffffff).convert_to<uint64_t>();
+  const uint64_t lo = (diff & 0xffffffffffffffff).convert_to<uint64_t>();
   ar.serialize_varint(hi);
   ar.serialize_varint(lo);
   if (!ar.stream().good())