diff options
Diffstat (limited to 'src/testlib/qtestcase.cpp')
| -rw-r--r-- | src/testlib/qtestcase.cpp | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/src/testlib/qtestcase.cpp b/src/testlib/qtestcase.cpp index 72bba52db3d..d8db979af86 100644 --- a/src/testlib/qtestcase.cpp +++ b/src/testlib/qtestcase.cpp @@ -3085,6 +3085,25 @@ TO_STRING_IMPL(bool, %d) TO_STRING_IMPL(signed char, %hhd) TO_STRING_IMPL(unsigned char, %hhu) +// Merge of ISO C23 getpayload() and issignaling() +template <typename T> static auto decodeNanPayload(T t) +{ + constexpr int Digits = std::numeric_limits<T>::digits; + constexpr quint64 MantissaMask = (Q_UINT64_C(1) << (Digits - 1)) - 1; + constexpr quint64 IsQuietBit = quint64(QT_CONFIG(signaling_nan)) << (Digits - 2); + constexpr quint64 PayloadMask = MantissaMask & ~IsQuietBit; + + struct R { + quint64 payload; + bool isQuiet; + } r; + Q_ASSERT(qIsNaN(t)); + quint64 u = qFromUnaligned<typename QIntegerForSizeof<T>::Unsigned>(&t); + r.payload = u & PayloadMask; + r.isQuiet = !QT_CONFIG(signaling_nan) || (u & IsQuietBit); + return r; +} + static bool signbit(qfloat16 f) { return f.signBit(); } // Be consistent about display of infinities and NaNs (snprintf()'s varies, @@ -3101,7 +3120,13 @@ template <typename T> static char *toStringFp(T t) qstrncpy(msg, (negative ? "-inf" : "inf"), 128); break; case FP_NAN: - qstrncpy(msg, (negative ? "-nan" : "nan"), 128); + if (auto r = decodeNanPayload(t); r.payload) { + std::snprintf(msg, 128, "%s%snan(%#llx)", + negative ? "-" : "", r.isQuiet ? "" : "s", r.payload); + } else { + Q_ASSERT(r.isQuiet); // only quiet NaNs can have payload == 0 + qstrncpy(msg, (negative ? "-nan" : "nan"), 128); + } break; case FP_ZERO: qstrncpy(msg, (negative ? "-0 (-0x0p+0)" : "0 (0x0p+0)"), 128); |