From 3edd3aa9826cc794b7c4457d81c186a8a9e34dd5 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Wed, 25 Jan 2023 19:38:20 +0200
Subject: [PATCH] Define and use BOOST_CORE_HAS_FLOAT128

---
 include/boost/core/max_align.hpp | 20 +++++++++++++++++++-
 test/max_align_test.cpp          |  2 +-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/include/boost/core/max_align.hpp b/include/boost/core/max_align.hpp
index 35d61d5..12c2692 100644
--- a/include/boost/core/max_align.hpp
+++ b/include/boost/core/max_align.hpp
@@ -14,6 +14,24 @@
 #include <boost/config.hpp>
 #include <cstddef>
 
+// BOOST_CORE_HAS_FLOAT128
+
+#if defined(BOOST_HAS_FLOAT128)
+
+# define BOOST_CORE_HAS_FLOAT128
+
+#elif defined(__SIZEOF_FLOAT128__)
+
+# define BOOST_CORE_HAS_FLOAT128
+
+#elif defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 404) && defined(__i386__)
+
+# define BOOST_CORE_HAS_FLOAT128
+
+#endif
+
+// max_align_t, max_align
+
 namespace boost
 {
 namespace core
@@ -42,7 +60,7 @@ union max_align_t
     double d;
     long double ld;
 
-#if defined(BOOST_HAS_FLOAT128) || defined(__SIZEOF_FLOAT128__)
+#if defined(BOOST_CORE_HAS_FLOAT128)
 
     __float128 f128;
 
diff --git a/test/max_align_test.cpp b/test/max_align_test.cpp
index 113e27e..4b4a97d 100644
--- a/test/max_align_test.cpp
+++ b/test/max_align_test.cpp
@@ -41,7 +41,7 @@ int main()
     BOOST_TEST_GE( boost::core::max_align, boost::alignment_of<double>::value );
     BOOST_TEST_GE( boost::core::max_align, boost::alignment_of<long double>::value );
 
-#if defined(BOOST_HAS_FLOAT128) || defined(__SIZEOF_FLOAT128__)
+#if defined(BOOST_CORE_HAS_FLOAT128)
 
     BOOST_TEST_GE( boost::core::max_align, boost::alignment_of<__float128>::value );