From 87fa81378d22c4a2946201e5f18d93251b949475 Mon Sep 17 00:00:00 2001
From: Erich Keane <erich.keane@intel.com>
Date: Mon, 22 Mar 2021 17:29:29 -0700
Subject: [PATCH] Generalize the 80-bit long double in <complex> for Clang
 (#1728)

---
 stl/inc/complex | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/stl/inc/complex b/stl/inc/complex
index 75510baa2..897d16463 100644
--- a/stl/inc/complex
+++ b/stl/inc/complex
@@ -540,7 +540,7 @@ public:
     }
 
     static bool _Isinf(_Ty _Left) { // test for infinity
-#if defined(__INTEL_COMPILER) && defined(__LONG_DOUBLE_SIZE__) && __LONG_DOUBLE_SIZE__ == 80
+#if defined(__LDBL_DIG__) && __LDBL_DIG__ == 18
         return _CSTD _LDtest(&_Left) == _INFCODE;
 #else // ^^^ 80-bit long double (not supported by MSVC in general, see GH-1316) / 64-bit long double vvv
         const auto _Uint = _Bit_cast<uint64_t>(_Left);
@@ -549,7 +549,7 @@ public:
     }
 
     static _CONSTEXPR20 bool _Isnan(_Ty _Left) {
-#if defined(__INTEL_COMPILER) && defined(__LONG_DOUBLE_SIZE__) && __LONG_DOUBLE_SIZE__ == 80
+#if defined(__LDBL_DIG__) && __LDBL_DIG__ == 18
         return _CSTD _LDtest(&_Left) == _NANCODE;
 #else // ^^^ 80-bit long double (not supported by MSVC in general, see GH-1316) / 64-bit long double vvv
         const auto _Uint = _Bit_cast<uint64_t>(_Left);