diff options
Diffstat (limited to 'absl/random/internal/fast_uniform_bits_test.cc')
| -rw-r--r-- | absl/random/internal/fast_uniform_bits_test.cc | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/absl/random/internal/fast_uniform_bits_test.cc b/absl/random/internal/fast_uniform_bits_test.cc index f4b9cd5fcc6d..183779445a52 100644 --- a/absl/random/internal/fast_uniform_bits_test.cc +++ b/absl/random/internal/fast_uniform_bits_test.cc @@ -45,57 +45,6 @@ TYPED_TEST(FastUniformBitsTypedTest, BasicTest) { } } -TEST(FastUniformBitsTest, TypeBoundaries32) { - // Tests that FastUniformBits can adapt to 32-bit boundaries. - absl::random_internal::FastUniformBits<uint32_t, 1> a; - absl::random_internal::FastUniformBits<uint32_t, 31> b; - absl::random_internal::FastUniformBits<uint32_t, 32> c; - - { - std::mt19937 gen; // 32-bit - a(gen); - b(gen); - c(gen); - } - - { - std::mt19937_64 gen; // 64-bit - a(gen); - b(gen); - c(gen); - } -} - -TEST(FastUniformBitsTest, TypeBoundaries64) { - // Tests that FastUniformBits can adapt to 64-bit boundaries. - absl::random_internal::FastUniformBits<uint64_t, 1> a; - absl::random_internal::FastUniformBits<uint64_t, 31> b; - absl::random_internal::FastUniformBits<uint64_t, 32> c; - absl::random_internal::FastUniformBits<uint64_t, 33> d; - absl::random_internal::FastUniformBits<uint64_t, 63> e; - absl::random_internal::FastUniformBits<uint64_t, 64> f; - - { - std::mt19937 gen; // 32-bit - a(gen); - b(gen); - c(gen); - d(gen); - e(gen); - f(gen); - } - - { - std::mt19937_64 gen; // 64-bit - a(gen); - b(gen); - c(gen); - d(gen); - e(gen); - f(gen); - } -} - class UrngOddbits { public: using result_type = uint8_t; @@ -135,18 +84,6 @@ TEST(FastUniformBitsTest, FastUniformBitsDetails) { static_assert(constants::kRangeMask == 0x0f, "constants::kRangeMask == false"); } - { - using looping = FastUniformBitsLoopingConstants<uint32_t, 31, Urng4bits>; - // To get 31 bits from a 4-bit generator, issue 8 calls and extract 4 bits - // per call on all except the first. - static_assert(looping::kN0 == 1, "looping::kN0"); - static_assert(looping::kW0 == 3, "looping::kW0"); - static_assert(looping::kM0 == 0x7, "looping::kM0"); - // (The second set of calls, kN1, will not do anything.) - static_assert(looping::kN1 == 8, "looping::kN1"); - static_assert(looping::kW1 == 4, "looping::kW1"); - static_assert(looping::kM1 == 0xf, "looping::kM1"); - } // ~7-bit URBG { @@ -158,31 +95,6 @@ TEST(FastUniformBitsTest, FastUniformBitsDetails) { static_assert(constants::kRangeMask == 0x7f, "constants::kRangeMask == 0x7f"); } - { - using looping = FastUniformBitsLoopingConstants<uint64_t, 60, UrngOddbits>; - // To get 60 bits from a 7-bit generator, issue 10 calls and extract 6 bits - // per call, discarding the excess entropy. - static_assert(looping::kN0 == 10, "looping::kN0"); - static_assert(looping::kW0 == 6, "looping::kW0"); - static_assert(looping::kM0 == 0x3f, "looping::kM0"); - // (The second set of calls, kN1, will not do anything.) - static_assert(looping::kN1 == 10, "looping::kN1"); - static_assert(looping::kW1 == 7, "looping::kW1"); - static_assert(looping::kM1 == 0x7f, "looping::kM1"); - } - { - using looping = FastUniformBitsLoopingConstants<uint64_t, 63, UrngOddbits>; - // To get 63 bits from a 7-bit generator, issue 10 calls--the same as we - // would issue for 60 bits--however this time we use two groups. The first - // group (kN0) will issue 7 calls, extracting 6 bits per call. - static_assert(looping::kN0 == 7, "looping::kN0"); - static_assert(looping::kW0 == 6, "looping::kW0"); - static_assert(looping::kM0 == 0x3f, "looping::kM0"); - // The second group (kN1) will issue 3 calls, extracting 7 bits per call. - static_assert(looping::kN1 == 10, "looping::kN1"); - static_assert(looping::kW1 == 7, "looping::kW1"); - static_assert(looping::kM1 == 0x7f, "looping::kM1"); - } } TEST(FastUniformBitsTest, Urng4_VariousOutputs) { @@ -193,33 +105,6 @@ TEST(FastUniformBitsTest, Urng4_VariousOutputs) { // 8-bit types { - absl::random_internal::FastUniformBits<uint8_t, 1> fast1; - EXPECT_EQ(0x1, fast1(urng4)); - EXPECT_EQ(0x1, fast1(urng32)); - } - { - absl::random_internal::FastUniformBits<uint8_t, 2> fast2; - EXPECT_EQ(0x1, fast2(urng4)); - EXPECT_EQ(0x1, fast2(urng32)); - } - - { - absl::random_internal::FastUniformBits<uint8_t, 4> fast4; - EXPECT_EQ(0x1, fast4(urng4)); - EXPECT_EQ(0x1, fast4(urng32)); - } - { - absl::random_internal::FastUniformBits<uint8_t, 6> fast6; - EXPECT_EQ(0x9, fast6(urng4)); // b001001 (2x3) - EXPECT_EQ(0x1, fast6(urng32)); - } - { - absl::random_internal::FastUniformBits<uint8_t, 6> fast7; - EXPECT_EQ(0x9, fast7(urng4)); // b00001001 (1x4 + 1x3) - EXPECT_EQ(0x1, fast7(urng32)); - } - - { absl::random_internal::FastUniformBits<uint8_t> fast8; EXPECT_EQ(0x11, fast8(urng4)); EXPECT_EQ(0x1, fast8(urng32)); @@ -227,22 +112,6 @@ TEST(FastUniformBitsTest, Urng4_VariousOutputs) { // 16-bit types { - absl::random_internal::FastUniformBits<uint16_t, 10> fast10; - EXPECT_EQ(0x91, fast10(urng4)); // b 0010010001 (2x3 + 1x4) - EXPECT_EQ(0x1, fast10(urng32)); - } - { - absl::random_internal::FastUniformBits<uint16_t, 11> fast11; - EXPECT_EQ(0x111, fast11(urng4)); - EXPECT_EQ(0x1, fast11(urng32)); - } - { - absl::random_internal::FastUniformBits<uint16_t, 12> fast12; - EXPECT_EQ(0x111, fast12(urng4)); - EXPECT_EQ(0x1, fast12(urng32)); - } - - { absl::random_internal::FastUniformBits<uint16_t> fast16; EXPECT_EQ(0x1111, fast16(urng4)); EXPECT_EQ(0x1, fast16(urng32)); @@ -250,17 +119,6 @@ TEST(FastUniformBitsTest, Urng4_VariousOutputs) { // 32-bit types { - absl::random_internal::FastUniformBits<uint32_t, 21> fast21; - EXPECT_EQ(0x49111, fast21(urng4)); // b 001001001 000100010001 (3x3 + 3x4) - EXPECT_EQ(0x1, fast21(urng32)); - } - { - absl::random_internal::FastUniformBits<uint32_t, 24> fast24; - EXPECT_EQ(0x111111, fast24(urng4)); - EXPECT_EQ(0x1, fast24(urng32)); - } - - { absl::random_internal::FastUniformBits<uint32_t> fast32; EXPECT_EQ(0x11111111, fast32(urng4)); EXPECT_EQ(0x1, fast32(urng32)); @@ -268,19 +126,6 @@ TEST(FastUniformBitsTest, Urng4_VariousOutputs) { // 64-bit types { - absl::random_internal::FastUniformBits<uint64_t, 5> fast5; - EXPECT_EQ(0x9, fast5(urng4)); - EXPECT_EQ(0x1, fast5(urng32)); - } - - { - absl::random_internal::FastUniformBits<uint64_t, 48> fast48; - EXPECT_EQ(0x111111111111, fast48(urng4)); - // computes in 2 steps, should be 24 << 24 - EXPECT_EQ(0x000001000001, fast48(urng32)); - } - - { absl::random_internal::FastUniformBits<uint64_t> fast64; EXPECT_EQ(0x1111111111111111, fast64(urng4)); EXPECT_EQ(0x0000000100000001, fast64(urng32)); |