diff options
Diffstat (limited to 'chromium/net/base/int128_unittest.cc')
| -rw-r--r-- | chromium/net/base/int128_unittest.cc | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/chromium/net/base/int128_unittest.cc b/chromium/net/base/int128_unittest.cc new file mode 100644 index 00000000000..78790e765fd --- /dev/null +++ b/chromium/net/base/int128_unittest.cc @@ -0,0 +1,265 @@ +// Copyright (c) 2012 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "base/basictypes.h" +#include "base/logging.h" +#include "net/base/int128.h" +#include "testing/gtest/include/gtest/gtest.h" + + +TEST(Int128, AllTests) { + uint128 zero(0); + uint128 one(1); + uint128 one_2arg(0, 1); + uint128 two(0, 2); + uint128 three(0, 3); + uint128 big(2000, 2); + uint128 big_minus_one(2000, 1); + uint128 bigger(2001, 1); + uint128 biggest(kuint128max); + uint128 high_low(1, 0); + uint128 low_high(0, kuint64max); + EXPECT_LT(one, two); + EXPECT_GT(two, one); + EXPECT_LT(one, big); + EXPECT_LT(one, big); + EXPECT_EQ(one, one_2arg); + EXPECT_NE(one, two); + EXPECT_GT(big, one); + EXPECT_GE(big, two); + EXPECT_GE(big, big_minus_one); + EXPECT_GT(big, big_minus_one); + EXPECT_LT(big_minus_one, big); + EXPECT_LE(big_minus_one, big); + EXPECT_NE(big_minus_one, big); + EXPECT_LT(big, biggest); + EXPECT_LE(big, biggest); + EXPECT_GT(biggest, big); + EXPECT_GE(biggest, big); + EXPECT_EQ(big, ~~big); + EXPECT_EQ(one, one | one); + EXPECT_EQ(big, big | big); + EXPECT_EQ(one, one | zero); + EXPECT_EQ(one, one & one); + EXPECT_EQ(big, big & big); + EXPECT_EQ(zero, one & zero); + EXPECT_EQ(zero, big & ~big); + EXPECT_EQ(zero, one ^ one); + EXPECT_EQ(zero, big ^ big); + EXPECT_EQ(one, one ^ zero); + EXPECT_EQ(big, big << 0); + EXPECT_EQ(big, big >> 0); + EXPECT_GT(big << 1, big); + EXPECT_LT(big >> 1, big); + EXPECT_EQ(big, (big << 10) >> 10); + EXPECT_EQ(big, (big >> 1) << 1); + EXPECT_EQ(one, (one << 80) >> 80); + EXPECT_EQ(zero, (one >> 80) << 80); + EXPECT_EQ(zero, big >> 128); + EXPECT_EQ(zero, big << 128); + EXPECT_EQ(Uint128High64(biggest), kuint64max); + EXPECT_EQ(Uint128Low64(biggest), kuint64max); + EXPECT_EQ(zero + one, one); + EXPECT_EQ(one + one, two); + EXPECT_EQ(big_minus_one + one, big); + EXPECT_EQ(one - one, zero); + EXPECT_EQ(one - zero, one); + EXPECT_EQ(zero - one, biggest); + EXPECT_EQ(big - big, zero); + EXPECT_EQ(big - one, big_minus_one); + EXPECT_EQ(big + kuint64max, bigger); + EXPECT_EQ(biggest + 1, zero); + EXPECT_EQ(zero - 1, biggest); + EXPECT_EQ(high_low - one, low_high); + EXPECT_EQ(low_high + one, high_low); + EXPECT_EQ(Uint128High64((uint128(1) << 64) - 1), 0u); + EXPECT_EQ(Uint128Low64((uint128(1) << 64) - 1), kuint64max); + EXPECT_TRUE(!!one); + EXPECT_TRUE(!!high_low); + EXPECT_FALSE(!!zero); + EXPECT_FALSE(!one); + EXPECT_FALSE(!high_low); + EXPECT_TRUE(!zero); + EXPECT_TRUE(zero == 0); + EXPECT_FALSE(zero != 0); + EXPECT_FALSE(one == 0); + EXPECT_TRUE(one != 0); + + uint128 test = zero; + EXPECT_EQ(++test, one); + EXPECT_EQ(test, one); + EXPECT_EQ(test++, one); + EXPECT_EQ(test, two); + EXPECT_EQ(test -= 2, zero); + EXPECT_EQ(test, zero); + EXPECT_EQ(test += 2, two); + EXPECT_EQ(test, two); + EXPECT_EQ(--test, one); + EXPECT_EQ(test, one); + EXPECT_EQ(test--, one); + EXPECT_EQ(test, zero); + EXPECT_EQ(test |= three, three); + EXPECT_EQ(test &= one, one); + EXPECT_EQ(test ^= three, two); + EXPECT_EQ(test >>= 1, one); + EXPECT_EQ(test <<= 1, two); + + EXPECT_EQ(big, -(-big)); + EXPECT_EQ(two, -((-one) - 1)); + EXPECT_EQ(kuint128max, -one); + EXPECT_EQ(zero, -zero); + + LOG(INFO) << one; + LOG(INFO) << big_minus_one; +} + +TEST(Int128, PodTests) { + uint128_pod pod = { 12345, 67890 }; + uint128 from_pod(pod); + EXPECT_EQ(12345u, Uint128High64(from_pod)); + EXPECT_EQ(67890u, Uint128Low64(from_pod)); + + uint128 zero(0); + uint128_pod zero_pod = {0, 0}; + uint128 one(1); + uint128_pod one_pod = {0, 1}; + uint128 two(2); + uint128_pod two_pod = {0, 2}; + uint128 three(3); + uint128_pod three_pod = {0, 3}; + uint128 big(1, 0); + uint128_pod big_pod = {1, 0}; + + EXPECT_EQ(zero, zero_pod); + EXPECT_EQ(zero_pod, zero); + EXPECT_EQ(zero_pod, zero_pod); + EXPECT_EQ(one, one_pod); + EXPECT_EQ(one_pod, one); + EXPECT_EQ(one_pod, one_pod); + EXPECT_EQ(two, two_pod); + EXPECT_EQ(two_pod, two); + EXPECT_EQ(two_pod, two_pod); + + EXPECT_NE(one, two_pod); + EXPECT_NE(one_pod, two); + EXPECT_NE(one_pod, two_pod); + + EXPECT_LT(one, two_pod); + EXPECT_LT(one_pod, two); + EXPECT_LT(one_pod, two_pod); + EXPECT_LE(one, one_pod); + EXPECT_LE(one_pod, one); + EXPECT_LE(one_pod, one_pod); + EXPECT_LE(one, two_pod); + EXPECT_LE(one_pod, two); + EXPECT_LE(one_pod, two_pod); + + EXPECT_GT(two, one_pod); + EXPECT_GT(two_pod, one); + EXPECT_GT(two_pod, one_pod); + EXPECT_GE(two, two_pod); + EXPECT_GE(two_pod, two); + EXPECT_GE(two_pod, two_pod); + EXPECT_GE(two, one_pod); + EXPECT_GE(two_pod, one); + EXPECT_GE(two_pod, one_pod); + + EXPECT_EQ(three, one | two_pod); + EXPECT_EQ(three, one_pod | two); + EXPECT_EQ(three, one_pod | two_pod); + EXPECT_EQ(one, three & one_pod); + EXPECT_EQ(one, three_pod & one); + EXPECT_EQ(one, three_pod & one_pod); + EXPECT_EQ(two, three ^ one_pod); + EXPECT_EQ(two, three_pod ^ one); + EXPECT_EQ(two, three_pod ^ one_pod); + EXPECT_EQ(two, three & (~one)); + EXPECT_EQ(three, ~~three); + + EXPECT_EQ(two, two_pod << 0); + EXPECT_EQ(two, one_pod << 1); + EXPECT_EQ(big, one_pod << 64); + EXPECT_EQ(zero, one_pod << 128); + EXPECT_EQ(two, two_pod >> 0); + EXPECT_EQ(one, two_pod >> 1); + EXPECT_EQ(one, big_pod >> 64); + + EXPECT_EQ(one, zero + one_pod); + EXPECT_EQ(one, zero_pod + one); + EXPECT_EQ(one, zero_pod + one_pod); + EXPECT_EQ(one, two - one_pod); + EXPECT_EQ(one, two_pod - one); + EXPECT_EQ(one, two_pod - one_pod); +} + +TEST(Int128, OperatorAssignReturnRef) { + uint128 v(1); + (v += 4) -= 3; + EXPECT_EQ(2, v); +} + +TEST(Int128, Multiply) { + uint128 a, b, c; + + // Zero test. + a = 0; + b = 0; + c = a * b; + EXPECT_EQ(0, c); + + // Max carries. + a = uint128(0) - 1; + b = uint128(0) - 1; + c = a * b; + EXPECT_EQ(1, c); + + // Self-operation with max carries. + c = uint128(0) - 1; + c *= c; + EXPECT_EQ(1, c); + + // 1-bit x 1-bit. + for (int i = 0; i < 64; ++i) { + for (int j = 0; j < 64; ++j) { + a = uint128(1) << i; + b = uint128(1) << j; + c = a * b; + EXPECT_EQ(uint128(1) << (i+j), c); + } + } + + // Verified with dc. + a = uint128(GG_ULONGLONG(0xffffeeeeddddcccc), + GG_ULONGLONG(0xbbbbaaaa99998888)); + b = uint128(GG_ULONGLONG(0x7777666655554444), + GG_ULONGLONG(0x3333222211110000)); + c = a * b; + EXPECT_EQ(uint128(GG_ULONGLONG(0x530EDA741C71D4C3), + GG_ULONGLONG(0xBF25975319080000)), c); + EXPECT_EQ(0, c - b * a); + EXPECT_EQ(a*a - b*b, (a+b) * (a-b)); + + // Verified with dc. + a = uint128(GG_ULONGLONG(0x0123456789abcdef), + GG_ULONGLONG(0xfedcba9876543210)); + b = uint128(GG_ULONGLONG(0x02468ace13579bdf), + GG_ULONGLONG(0xfdb97531eca86420)); + c = a * b; + EXPECT_EQ(uint128(GG_ULONGLONG(0x97a87f4f261ba3f2), + GG_ULONGLONG(0x342d0bbf48948200)), c); + EXPECT_EQ(0, c - b * a); + EXPECT_EQ(a*a - b*b, (a+b) * (a-b)); +} + +TEST(Int128, AliasTests) { + uint128 x1(1, 2); + uint128 x2(2, 4); + x1 += x1; + EXPECT_EQ(x2, x1); + + uint128 x3(1, 1ull << 63); + uint128 x4(3, 0); + x3 += x3; + EXPECT_EQ(x4, x3); +} |