diff options
author | 2021-03-04 09:10:07 -0800 | |
---|---|---|
committer | 2021-03-05 09:40:59 -0500 | |
commit | ab21820d47e4f83875dda008b600514d3520fd35 (patch) | |
tree | e32adb788be1e541a2fdfb91b5edf92a84f897e4 /absl/random/exponential_distribution_test.cc | |
parent | b0735979d778a768caee207f01f327535cbd2140 (diff) |
Export of internal Abseil changes
--
e2de21d54c02b6419c57c0f4e2a16b608deca260 by Evan Brown <ezb@google.com>:
Remove the InsertEnd benchmark.
This benchmark has significantly different possible behaviors that can result in misleading metrics. Specifically, we can have a case where we are deallocating the last node in the b-tree in the erase and then allocating a new node in the insert call repeatedly, whereas normally, we end up just inserting/erasing a value from the last node. Also, the name of the benchmark is misleading because it involves an erase and an insert, but the name only mentions the insert.
PiperOrigin-RevId: 360930639
--
51f6bb97b9cbdb809c31b77e93ce080ca3cba9ea by Benjamin Barenblat <bbaren@google.com>:
Stop testing with double-double random variables
On POWER, long double is often represented as a pair of doubles added
together (double-double arithmetic). We’ve already special-cased
double-double arithmetic in a number of tests, but compiler
bugs [1, 2, 3] have now triggered both false positives and false
negatives, which suggests testing with double doubles is unlikely to
yield useful signal. Remove the special casing and detect if we’re on a
double-double system; if so, just don’t test long doubles.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99048
[2] https://bugs.llvm.org/show_bug.cgi?id=49131
[3] https://bugs.llvm.org/show_bug.cgi?id=49132
PiperOrigin-RevId: 360793161
--
07fb4d7932c2f5d711c480f759dacb0be60f975e by Abseil Team <absl-team@google.com>:
internal change
PiperOrigin-RevId: 360712825
GitOrigin-RevId: e2de21d54c02b6419c57c0f4e2a16b608deca260
Change-Id: I98389b5a8789dcc8f35abc00c767e909181665f0
Diffstat (limited to 'absl/random/exponential_distribution_test.cc')
-rw-r--r-- | absl/random/exponential_distribution_test.cc | 28 |
1 files changed, 10 insertions, 18 deletions
diff --git a/absl/random/exponential_distribution_test.cc b/absl/random/exponential_distribution_test.cc index 5a8afde5..af11d61c 100644 --- a/absl/random/exponential_distribution_test.cc +++ b/absl/random/exponential_distribution_test.cc @@ -30,6 +30,7 @@ #include "gtest/gtest.h" #include "absl/base/internal/raw_logging.h" #include "absl/base/macros.h" +#include "absl/numeric/internal/representation.h" #include "absl/random/internal/chi_square.h" #include "absl/random/internal/distribution_test_util.h" #include "absl/random/internal/pcg_engine.h" @@ -47,7 +48,15 @@ using absl::random_internal::kChiSquared; template <typename RealType> class ExponentialDistributionTypedTest : public ::testing::Test {}; -using RealTypes = ::testing::Types<float, double, long double>; +// double-double arithmetic is not supported well by either GCC or Clang; see +// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99048, +// https://bugs.llvm.org/show_bug.cgi?id=49131, and +// https://bugs.llvm.org/show_bug.cgi?id=49132. Don't bother running these tests +// with double doubles until compiler support is better. +using RealTypes = + std::conditional<absl::numeric_internal::IsDoubleDouble(), + ::testing::Types<float, double>, + ::testing::Types<float, double, long double>>::type; TYPED_TEST_CASE(ExponentialDistributionTypedTest, RealTypes); TYPED_TEST(ExponentialDistributionTypedTest, SerializeTest) { @@ -126,23 +135,6 @@ TYPED_TEST(ExponentialDistributionTypedTest, SerializeTest) { ss >> after; -#if defined(__powerpc64__) || defined(__PPC64__) || defined(__powerpc__) || \ - defined(__ppc__) || defined(__PPC__) - if (std::is_same<TypeParam, long double>::value) { - // Roundtripping floating point values requires sufficient precision to - // reconstruct the exact value. It turns out that long double has some - // errors doing this on ppc, particularly for values - // near {1.0 +/- epsilon}. - if (lambda <= std::numeric_limits<double>::max() && - lambda >= std::numeric_limits<double>::lowest()) { - EXPECT_EQ(static_cast<double>(before.lambda()), - static_cast<double>(after.lambda())) - << ss.str(); - } - continue; - } -#endif - EXPECT_EQ(before.lambda(), after.lambda()) // << ss.str() << " " // << (ss.good() ? "good " : "") // |