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Faster emulated half comparisons

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This commit is contained in:
Charles Schlosser
2025-06-17 17:05:58 +00:00
committed by Antonio Sánchez
parent ac6955ebc6
commit bcce88c99e
3 changed files with 121 additions and 35 deletions
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48
test/half_float.cpp
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@@ -72,17 +72,16 @@ void test_conversion() {
// NaNs and infinities.
VERIFY(!(numext::isinf)(float(half(65504.0f)))); // Largest finite number.
VERIFY(!(numext::isnan)(float(half(0.0f))));
VERIFY((numext::isfinite)(float(half(65504.0f))));
VERIFY((numext::isfinite)(float(half(0.0f))));
VERIFY((numext::isinf)(float(half(__half_raw(0xfc00)))));
VERIFY((numext::isnan)(float(half(__half_raw(0xfc01)))));
VERIFY((numext::isinf)(float(half(__half_raw(0x7c00)))));
VERIFY((numext::isnan)(float(half(__half_raw(0x7c01)))));
#if !EIGEN_COMP_MSVC
// Visual Studio errors out on divisions by 0
VERIFY((numext::isnan)(float(half(0.0 / 0.0))));
VERIFY((numext::isinf)(float(half(1.0 / 0.0))));
VERIFY((numext::isinf)(float(half(-1.0 / 0.0))));
#endif
VERIFY((numext::isnan)(float(NumTraits<half>::quiet_NaN())));
VERIFY((numext::isinf)(float(NumTraits<half>::infinity())));
VERIFY((numext::isinf)(float(-NumTraits<half>::infinity())));
// Exactly same checks as above, just directly on the half representation.
VERIFY(!(numext::isinf)(half(__half_raw(0x7bff))));
@@ -92,12 +91,9 @@ void test_conversion() {
VERIFY((numext::isinf)(half(__half_raw(0x7c00))));
VERIFY((numext::isnan)(half(__half_raw(0x7c01))));
#if !EIGEN_COMP_MSVC
// Visual Studio errors out on divisions by 0
VERIFY((numext::isnan)(half(0.0 / 0.0)));
VERIFY((numext::isinf)(half(1.0 / 0.0)));
VERIFY((numext::isinf)(half(-1.0 / 0.0)));
#endif
VERIFY((numext::isnan)(NumTraits<half>::quiet_NaN()));
VERIFY((numext::isinf)(NumTraits<half>::infinity()));
VERIFY((numext::isinf)(-NumTraits<half>::infinity()));
// Conversion to bool
VERIFY(!static_cast<bool>(half(0.0)));
@@ -204,19 +200,25 @@ void test_comparison() {
VERIFY(half(1.0f) != half(2.0f));
// Comparisons with NaNs and infinities.
#if !EIGEN_COMP_MSVC
// Visual Studio errors out on divisions by 0
VERIFY(!(half(0.0 / 0.0) == half(0.0 / 0.0)));
VERIFY(half(0.0 / 0.0) != half(0.0 / 0.0));
VERIFY(!(NumTraits<half>::quiet_NaN() == NumTraits<half>::quiet_NaN()));
VERIFY(NumTraits<half>::quiet_NaN() != NumTraits<half>::quiet_NaN());
VERIFY(!(half(1.0) == half(0.0 / 0.0)));
VERIFY(!(half(1.0) < half(0.0 / 0.0)));
VERIFY(!(half(1.0) > half(0.0 / 0.0)));
VERIFY(half(1.0) != half(0.0 / 0.0));
VERIFY(!(internal::random<half>() == NumTraits<half>::quiet_NaN()));
VERIFY(!(internal::random<half>() < NumTraits<half>::quiet_NaN()));
VERIFY(!(internal::random<half>() > NumTraits<half>::quiet_NaN()));
VERIFY(!(internal::random<half>() <= NumTraits<half>::quiet_NaN()));
VERIFY(!(internal::random<half>() >= NumTraits<half>::quiet_NaN()));
VERIFY(internal::random<half>() != NumTraits<half>::quiet_NaN());
VERIFY(half(1.0) < half(1.0 / 0.0));
VERIFY(half(1.0) > half(-1.0 / 0.0));
#endif
VERIFY(!(NumTraits<half>::quiet_NaN() == internal::random<half>()));
VERIFY(!(NumTraits<half>::quiet_NaN() < internal::random<half>()));
VERIFY(!(NumTraits<half>::quiet_NaN() > internal::random<half>()));
VERIFY(!(NumTraits<half>::quiet_NaN() <= internal::random<half>()));
VERIFY(!(NumTraits<half>::quiet_NaN() >= internal::random<half>()));
VERIFY(NumTraits<half>::quiet_NaN() != internal::random<half>());
VERIFY(internal::random<half>() < NumTraits<half>::infinity());
VERIFY(internal::random<half>() > -NumTraits<half>::infinity());
}
void test_basic_functions() {