From 506871651e809818bce6fdb02b6becabe50b5c4f Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Mon, 12 Jan 2026 09:16:59 -0500
Subject: [PATCH 1/3] Add expanded reproducer test set

---
 test/Jamfile               |  1 +
 test/github_issue_1294.cpp | 40 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 test/github_issue_1294.cpp

diff --git a/test/Jamfile b/test/Jamfile
index 4d353e375..e318db689 100644
--- a/test/Jamfile
+++ b/test/Jamfile
@@ -82,6 +82,7 @@ run github_issue_1110.cpp ;
 run github_issue_1112.cpp ;
 run github_issue_1174.cpp ;
 run github_issue_1260.cpp ;
+run github_issue_1294.cpp ;
 
 run link_1.cpp link_2.cpp link_3.cpp ;
 run quick.cpp ;
diff --git a/test/github_issue_1294.cpp b/test/github_issue_1294.cpp
new file mode 100644
index 000000000..93b3e56b9
--- /dev/null
+++ b/test/github_issue_1294.cpp
@@ -0,0 +1,40 @@
+// Copyright 2025 Matt Borland
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+//
+// See: https://github.com/cppalliance/decimal/issues/1294
+
+#include <boost/decimal.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+using namespace boost::decimal;
+
+template <typename T>
+void test()
+{
+    const T val {"0.999"};
+    constexpr T ref_1 {1};
+    constexpr T ref_0 {0};
+
+    BOOST_TEST_EQ(ceil(val), ref_1);
+    BOOST_TEST_EQ(floor(val), ref_0);
+    BOOST_TEST_EQ(trunc(val), ref_0);
+    BOOST_TEST_EQ(round(val), ref_1);
+    BOOST_TEST_EQ(lround(val), 1L);
+    BOOST_TEST_EQ(nearbyint(val), 1);
+    BOOST_TEST_EQ(lrint(val), 1L);
+    BOOST_TEST_EQ(llrint(val), 1LL);
+}
+
+int main()
+{
+    test<decimal32_t>();
+    test<decimal64_t>();
+    test<decimal128_t>();
+
+    test<decimal_fast32_t>();
+    test<decimal_fast64_t>();
+    test<decimal_fast128_t>();
+
+    return boost::report_errors();
+}

From c0067b0d803fbb3816e263bbd9f97f12b6f9fe2d Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Mon, 12 Jan 2026 09:33:10 -0500
Subject: [PATCH 2/3] Fix conditional logic

---
 include/boost/decimal/detail/cmath/round.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/decimal/detail/cmath/round.hpp b/include/boost/decimal/detail/cmath/round.hpp
index 0ed3fc16f..bbb478306 100644
--- a/include/boost/decimal/detail/cmath/round.hpp
+++ b/include/boost/decimal/detail/cmath/round.hpp
@@ -43,11 +43,11 @@ constexpr auto round(const T num) noexcept
     T iptr {};
     const auto x {modf(num, &iptr)};
 
-    if (x >= half && iptr > 0)
+    if (x >= half)
     {
         ++iptr;
     }
-    else if (abs(x) >= half && iptr < 0)
+    else if (x <= -half)
     {
         --iptr;
     }

From b6954c244825a27502e922cb539cfd715f2a678b Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Mon, 12 Jan 2026 09:33:21 -0500
Subject: [PATCH 3/3] Add additional edge case test value

---
 test/github_issue_1294.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/test/github_issue_1294.cpp b/test/github_issue_1294.cpp
index 93b3e56b9..f1b872d27 100644
--- a/test/github_issue_1294.cpp
+++ b/test/github_issue_1294.cpp
@@ -9,6 +9,23 @@
 
 using namespace boost::decimal;
 
+template <typename T>
+void test_round_down()
+{
+    const T val {"0.499"};
+    constexpr T ref_1 {1};
+    constexpr T ref_0 {0};
+
+    BOOST_TEST_EQ(ceil(val), ref_1);
+    BOOST_TEST_EQ(floor(val), ref_0);
+    BOOST_TEST_EQ(trunc(val), ref_0);
+    BOOST_TEST_EQ(round(val), ref_0);
+    BOOST_TEST_EQ(lround(val), 0L);
+    BOOST_TEST_EQ(nearbyint(val), 0);
+    BOOST_TEST_EQ(lrint(val), 0L);
+    BOOST_TEST_EQ(llrint(val), 0LL);
+}
+
 template <typename T>
 void test()
 {
@@ -24,6 +41,8 @@ void test()
     BOOST_TEST_EQ(nearbyint(val), 1);
     BOOST_TEST_EQ(lrint(val), 1L);
     BOOST_TEST_EQ(llrint(val), 1LL);
+
+    test_round_down<T>();
 }
 
 int main()