From 486fdaae667142b1196f449a9766f3a2cc58c164 Mon Sep 17 00:00:00 2001 From: NAKAMURA Takumi Date: Sun, 12 Jan 2014 14:44:46 +0000 Subject: [PATCH] raw_stream formatter: [Win32] Use std::signbit() if available, instead of _fpclass(). FIXME: It should be generic to C++11. For now, it is dedicated to mingw-w64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199052 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Support/raw_ostream.cpp | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp index cb9648981a3..84f5ab592e6 100644 --- a/lib/Support/raw_ostream.cpp +++ b/lib/Support/raw_ostream.cpp @@ -227,11 +227,17 @@ raw_ostream &raw_ostream::operator<<(double N) { // On MSVCRT and compatible, output of %e is incompatible to Posix // by default. Number of exponent digits should be at least 2. "%+03d" // FIXME: Implement our formatter to here or Support/Format.h! +#if __cplusplus >= 201103L && defined(__MINGW32__) + // FIXME: It should be generic to C++11. + if (N == 0.0 && std::signbit(N)) + return *this << "-0.000000e+00"; +#else int fpcl = _fpclass(N); // negative zero if (fpcl == _FPCLASS_NZ) return *this << "-0.000000e+00"; +#endif char buf[16]; unsigned len; -- 2.34.1