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Export of internal Abseil changes

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--
d35c72d705155dcd89a92835103540f14c643d10 by Gennadiy Rozental <rogeeff@google.com>:

helpxml changed to report types of flags with built-in value type.

PiperOrigin-RevId: 275131440

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f3478792943d7dd40a6ef6083a8e5d374f43a65e by Abseil Team <absl-team@google.com>:

Add space padding tests for hex conversions.

PiperOrigin-RevId: 275120155

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7c2e4725403e173660f33f94af686a75d3722936 by Andy Soffer <asoffer@google.com>:

Fix https://github.com/abseil/abseil-cpp/issues/379
by renaming `roundup` to `round_up`

PiperOrigin-RevId: 275106110

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84cb30d6ee509961ac4359cfdda1360973b9527d by Laramie Leavitt <lar@google.com>:

Move random_internal::wide_multiply into a file by the same name.

PiperOrigin-RevId: 275059359

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06d691a8c187b5d899e7863784b23bdcfd580cb2 by Abseil Team <absl-team@google.com>:

Add missing "return" keyword.

PiperOrigin-RevId: 275036408
GitOrigin-RevId: d35c72d705155dcd89a92835103540f14c643d10
Change-Id: Id837b4de6c9cfe18f0a088363754bfe389df985b
This commit is contained in:
Abseil Team 2019-10-16 15:51:11 -07:00 • committed by Andy Soffer
parent ab3552a189
commit a15364ce4d
12 changed files with 275 additions and 118 deletions
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42
absl/random/internal/distribution_impl_test.cc
View file

@ -461,46 +461,4 @@ TEST(DistributionImplTest, ExhaustiveFloat) {
}
}
TEST(DistributionImplTest, MultiplyU64ToU128Test) {
using absl::random_internal::MultiplyU64ToU128;
constexpr uint64_t k1 = 1;
constexpr uint64_t kMax = ~static_cast<uint64_t>(0);
EXPECT_EQ(absl::uint128(0), MultiplyU64ToU128(0, 0));
// Max uint64
EXPECT_EQ(MultiplyU64ToU128(kMax, kMax),
absl::MakeUint128(0xfffffffffffffffe, 0x0000000000000001));
EXPECT_EQ(absl::MakeUint128(0, kMax), MultiplyU64ToU128(kMax, 1));
EXPECT_EQ(absl::MakeUint128(0, kMax), MultiplyU64ToU128(1, kMax));
for (int i = 0; i < 64; ++i) {
EXPECT_EQ(absl::MakeUint128(0, kMax) << i,
MultiplyU64ToU128(kMax, k1 << i));
EXPECT_EQ(absl::MakeUint128(0, kMax) << i,
MultiplyU64ToU128(k1 << i, kMax));
}
// 1-bit x 1-bit.
for (int i = 0; i < 64; ++i) {
for (int j = 0; j < 64; ++j) {
EXPECT_EQ(absl::MakeUint128(0, 1) << (i + j),
MultiplyU64ToU128(k1 << i, k1 << j));
EXPECT_EQ(absl::MakeUint128(0, 1) << (i + j),
MultiplyU64ToU128(k1 << i, k1 << j));
}
}
// Verified multiplies
EXPECT_EQ(MultiplyU64ToU128(0xffffeeeeddddcccc, 0xbbbbaaaa99998888),
absl::MakeUint128(0xbbbb9e2692c5dddc, 0xc28f7531048d2c60));
EXPECT_EQ(MultiplyU64ToU128(0x0123456789abcdef, 0xfedcba9876543210),
absl::MakeUint128(0x0121fa00ad77d742, 0x2236d88fe5618cf0));
EXPECT_EQ(MultiplyU64ToU128(0x0123456789abcdef, 0xfdb97531eca86420),
absl::MakeUint128(0x0120ae99d26725fc, 0xce197f0ecac319e0));
EXPECT_EQ(MultiplyU64ToU128(0x97a87f4f261ba3f2, 0xfedcba9876543210),
absl::MakeUint128(0x96fbf1a8ae78d0ba, 0x5a6dd4b71f278320));
EXPECT_EQ(MultiplyU64ToU128(0xfedcba9876543210, 0xfdb97531eca86420),
absl::MakeUint128(0xfc98c6981a413e22, 0x342d0bbf48948200));
}
} // namespace