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-rw-r--r--libcxx/include/thread5
1 files changed, 5 insertions, 0 deletions
diff --git a/libcxx/include/thread b/libcxx/include/thread
index df06ff70f8e..400459ae7f3 100644
--- a/libcxx/include/thread
+++ b/libcxx/include/thread
@@ -434,7 +434,12 @@ sleep_for(const chrono::duration<_Rep, _Period>& __d)
using namespace chrono;
if (__d > duration<_Rep, _Period>::zero())
{
+#if defined(_LIBCPP_COMPILER_GCC) && (__powerpc__ || __POWERPC__)
+ // GCC's long double const folding is incomplete for IBM128 long doubles.
+ _LIBCPP_CONSTEXPR duration<long double> _Max = duration<long double>(ULLONG_MAX/1000000000ULL) ;
+#else
_LIBCPP_CONSTEXPR duration<long double> _Max = nanoseconds::max();
+#endif
nanoseconds __ns;
if (__d < _Max)
{
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