Make __float128 a floating point type.

Allows float128 to be used in non gnu mode. Enable some tests for non-gnu mode. Fixes #569.
boostorg · Sep 7, 2024 · 2b80178 · 2b80178
1 parent 0ab75f9
commit 2b80178
Show file tree

Hide file tree

Showing 5 changed files with 29 additions and 1 deletion.
diff --git a/config/Jamfile.v2 b/config/Jamfile.v2
@@ -70,6 +70,7 @@ mp-run-simple has_mpc.cpp mpc mpfr gmp : : :
 mp-run-simple has_tommath.cpp tommath : : :
       <include>$(tommath_path) : has_tommath ;
 mp-run-simple has_float128.cpp quadmath : : : : has_float128 ;
+mp-run-simple has_basic_float128.cpp quadmath : : : : has_basic_float128 ;
 exe has_intel_quad : has_intel_quad.cpp : <cxxflags>-Qoption,cpp,--extended_float_type ;
 exe has_eigen : has_eigen.cpp ;
 exe has_f2c : has_f2c.cpp f2c ;
@@ -83,6 +84,7 @@ explicit has_mpfr ;
 explicit has_mpfi ;
 explicit has_tommath ;
 explicit has_float128 ;
+explicit has_basic_float128 ;
 explicit has_intel_quad ;
 explicit has_mpc ;
 explicit has_eigen ;

diff --git a/config/has_basic_float128.cpp b/config/has_basic_float128.cpp
@@ -0,0 +1,16 @@
+//  Copyright John Maddock 2024.
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/config.hpp>
+
+extern "C" __float128 sqrtq(__float128);
+
+int main()
+{
+   __float128 f = 0;
+   f = sqrtq(f);
+
+   return 0;
+}
diff --git a/include/boost/multiprecision/detail/number_base.hpp b/include/boost/multiprecision/detail/number_base.hpp
@@ -1534,6 +1534,11 @@ struct number_category<number<Backend, ExpressionTemplates> > : public number_ca
 template <class tag, class A1, class A2, class A3, class A4>
 struct number_category<detail::expression<tag, A1, A2, A3, A4> > : public number_category<typename detail::expression<tag, A1, A2, A3, A4>::result_type>
 {};
+#if defined(__SIZEOF_FLOAT128__)
+template <>
+struct number_category<__float128> : public std::integral_constant<int, number_kind_floating_point> {};
+#endif
+
 //
 // Specializations for types which do not always have numberic_limits specializations:
 //

diff --git a/include/boost/multiprecision/traits/std_integer_traits.hpp b/include/boost/multiprecision/traits/std_integer_traits.hpp
@@ -27,6 +27,11 @@ struct make_unsigned : public std::make_unsigned<T> {};
 template <class T>
 struct make_signed : public std::make_signed<T> {};
 
+#if defined(__SIZEOF_FLOAT128__)
+template <>
+struct is_arithmetic<__float128> : public std::true_type {};
+#endif
+
 #ifdef BOOST_HAS_INT128
 
 template <>

diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
@@ -204,7 +204,7 @@ test-suite arithmetic_tests :
 
    [ run test_arithmetic_mpfi_50.cpp mpfi mpfr gmp no_eh_support : : : [ check-target-builds ../config//has_mpfi : : <build>no ] [ check-target-builds ../config//has_float128 : <source>quadmath ] ]
 
-   [ run test_arithmetic_float_128.cpp quadmath no_eh_support : : : [ check-target-builds ../config//has_float128 : : <build>no ] ]
+   [ run test_arithmetic_float_128.cpp quadmath no_eh_support : : : [ check-target-builds ../config//has_basic_float128 : : <build>no ] ]
    [ run test_arithmetic_float_128.cpp no_eh_support : : : [ check-target-builds ../config//has_intel_quad : <cxxflags>-Qoption,cpp,--extended_float_type : <build>no ] [ check-target-builds ../config//has_float128 : <source>quadmath ] : test_arithmetic_intel_quad ]
 
    [ run test_arithmetic_mpc.cpp mpc mpfr gmp : : : [ check-target-builds ../config//has_mpc : : <build>no ] [ check-target-builds ../config//has_float128 : <source>quadmath ] ]