diff options
| -rw-r--r-- | src/unittest/test_serialization.cpp | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/unittest/test_serialization.cpp b/src/unittest/test_serialization.cpp index b526792c4..ca4116413 100644 --- a/src/unittest/test_serialization.cpp +++ b/src/unittest/test_serialization.cpp @@ -674,6 +674,19 @@ void TestSerialization::testFloatFormat() return; } + // The code below compares the IEEE conversion functions with a + // known good IEC559/IEEE754 implementation. This test neeeds + // IEC559 compliance in the compiler. +#if defined(__GNUC__) && (!defined(__STDC_IEC_559__) || defined(__FAST_MATH__)) + // GNU C++ lies about its IEC559 support when -ffast-math is active. + // https://gcc.gnu.org/bugzilla//show_bug.cgi?id=84949 + bool is_iec559 = false; +#else + bool is_iec559 = std::numeric_limits<f32>::is_iec559; +#endif + if (!is_iec559) + return; + auto test_single = [&fs, &fm](const u32 &i) -> bool { memcpy(&fm, &i, 4); fs = u32Tof32Slow(i); |