Accept 80-bit long double in <complex> (microsoft#1316)

simmse · StephanTLavavej · web-flow · commit c70b7a830eda · 2020-09-25T16:20:14.000-07:00
Co-authored-by: Stephan T. Lavavej &lt;stl@microsoft.com&gt;
diff --git a/stl/inc/complex b/stl/inc/complex
@@ -223,13 +223,21 @@ public:
     }
 
     static bool _Isinf(_Ty _Left) { // test for infinity
+#if defined(__INTEL_COMPILER) && defined(__LONG_DOUBLE_SIZE__) && __LONG_DOUBLE_SIZE__ == 80
+        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);
         return (_Uint & 0x7fffffffffffffffU) == 0x7ff0000000000000U;
+#endif // ^^^ 64-bit long double ^^^
     }
 
     static _CONSTEXPR20 bool _Isnan(_Ty _Left) {
+#if defined(__INTEL_COMPILER) && defined(__LONG_DOUBLE_SIZE__) && __LONG_DOUBLE_SIZE__ == 80
+        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);
         return (_Uint & 0x7fffffffffffffffU) > 0x7ff0000000000000U;
+#endif // ^^^ 64-bit long double ^^^
     }
 
     static constexpr _Ty _Nanv() { // return NaN

Original file line number	Diff line number	Diff line change
`@@ -223,13 +223,21 @@ public:`
`223`	`223`	`}`
`224`	`224`
`225`	`225`	`static bool _Isinf(_Ty _Left) { // test for infinity`
	`226`	`+#if defined(__INTEL_COMPILER) && defined(__LONG_DOUBLE_SIZE__) && __LONG_DOUBLE_SIZE__ == 80`
	`227`	`+ return _CSTD _LDtest(&_Left) == _INFCODE;`
	`228`	`+#else // ^^^ 80-bit long double (not supported by MSVC in general, see GH-1316) / 64-bit long double vvv`
`226`	`229`	`const auto _Uint = _Bit_cast<uint64_t>(_Left);`
`227`	`230`	`return (_Uint & 0x7fffffffffffffffU) == 0x7ff0000000000000U;`
	`231`	`+#endif // ^^^ 64-bit long double ^^^`
`228`	`232`	`}`
`229`	`233`
`230`	`234`	`static _CONSTEXPR20 bool _Isnan(_Ty _Left) {`
	`235`	`+#if defined(__INTEL_COMPILER) && defined(__LONG_DOUBLE_SIZE__) && __LONG_DOUBLE_SIZE__ == 80`
	`236`	`+ return _CSTD _LDtest(&_Left) == _NANCODE;`
	`237`	`+#else // ^^^ 80-bit long double (not supported by MSVC in general, see GH-1316) / 64-bit long double vvv`
`231`	`238`	`const auto _Uint = _Bit_cast<uint64_t>(_Left);`
`232`	`239`	`return (_Uint & 0x7fffffffffffffffU) > 0x7ff0000000000000U;`
	`240`	`+#endif // ^^^ 64-bit long double ^^^`
`233`	`241`	`}`
`234`	`242`
`235`	`243`	`static constexpr _Ty _Nanv() { // return NaN`