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Implement isnan

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This commit is contained in:
Victor Zverovich
2022-03-14 20:37:46 -07:00
parent a204b8dde7
commit ed18ca3eae
3 changed files with 28 additions and 24 deletions
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21
test/format-test.cc
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@@ -87,6 +87,27 @@ TEST(float_test, isfinite) {
#endif
}
template <typename Float> void check_isnan() {
using fmt::detail::isnan;
EXPECT_FALSE(isnan(Float(0.0)));
EXPECT_FALSE(isnan(Float(42.0)));
EXPECT_FALSE(isnan(Float(-42.0)));
EXPECT_FALSE(isnan(Float(fmt::detail::max_value<double>())));
// Use double because std::numeric_limits is broken for __float128.
using limits = std::numeric_limits<double>;
EXPECT_FALSE(isnan(Float(limits::infinity())));
EXPECT_FALSE(isnan(Float(-limits::infinity())));
EXPECT_TRUE(isnan(Float(limits::quiet_NaN())));
EXPECT_TRUE(isnan(Float(-limits::quiet_NaN())));
}
TEST(float_test, isnan) {
check_isnan<double>();
#ifdef __SIZEOF_FLOAT128__
check_isnan<fmt::detail::float128>();
#endif
}
struct uint32_pair {
uint32_t u[2];
};