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// Copyright 2022 Google LLC
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "hwy/aligned_allocator.h"
// clang-format off
#undef HWY_TARGET_INCLUDE
#define HWY_TARGET_INCLUDE "hwy/contrib/algo/copy_test.cc"
#include "hwy/foreach_target.h" // IWYU pragma: keep
#include "hwy/contrib/algo/copy-inl.h"
#include "hwy/tests/test_util-inl.h"
// clang-format on
// If your project requires C++14 or later, you can ignore this and pass lambdas
// directly to Transform, without requiring an lvalue as we do here for C++11.
#if __cplusplus < 201402L
#define HWY_GENERIC_LAMBDA 0
#else
#define HWY_GENERIC_LAMBDA 1
#endif
HWY_BEFORE_NAMESPACE();
namespace hwy {
namespace HWY_NAMESPACE {
// Returns random integer in [0, 128), which fits in any lane type.
template <typename T>
T Random7Bit(RandomState& rng) {
return static_cast<T>(Random32(&rng) & 127);
}
// In C++14, we can instead define these as generic lambdas next to where they
// are invoked.
#if !HWY_GENERIC_LAMBDA
struct IsOdd {
template <class D, class V>
Mask<D> operator()(D d, V v) const {
return TestBit(v, Set(d, TFromD<D>{1}));
}
};
#endif // !HWY_GENERIC_LAMBDA
// Invokes Test (e.g. TestCopyIf) with all arg combinations. T comes from
// ForFloatTypes.
template <class Test>
struct ForeachCountAndMisalign {
template <typename T, class D>
HWY_NOINLINE void operator()(T /*unused*/, D d) const {
RandomState rng;
const size_t N = Lanes(d);
const size_t misalignments[3] = {0, N / 4, 3 * N / 5};
for (size_t count = 0; count < 2 * N; ++count) {
for (size_t ma : misalignments) {
for (size_t mb : misalignments) {
Test()(d, count, ma, mb, rng);
}
}
}
}
};
struct TestFill {
template <class D>
void operator()(D d, size_t count, size_t misalign_a, size_t misalign_b,
RandomState& rng) {
using T = TFromD<D>;
// HWY_MAX prevents error when misalign == count == 0.
AlignedFreeUniquePtr<T[]> pa =
AllocateAligned<T>(HWY_MAX(1, misalign_a + count));
T* expected = pa.get() + misalign_a;
const T value = Random7Bit<T>(rng);
for (size_t i = 0; i < count; ++i) {
expected[i] = value;
}
AlignedFreeUniquePtr<T[]> pb = AllocateAligned<T>(misalign_b + count + 1);
T* actual = pb.get() + misalign_b;
actual[count] = T{0}; // sentinel
Fill(d, value, count, actual);
HWY_ASSERT_EQ(T{0}, actual[count]); // did not write past end
const auto info = hwy::detail::MakeTypeInfo<T>();
const char* target_name = hwy::TargetName(HWY_TARGET);
hwy::detail::AssertArrayEqual(info, expected, actual, count, target_name,
__FILE__, __LINE__);
}
};
void TestAllFill() {
ForAllTypes(ForPartialVectors<ForeachCountAndMisalign<TestFill>>());
}
struct TestCopy {
template <class D>
void operator()(D d, size_t count, size_t misalign_a, size_t misalign_b,
RandomState& rng) {
using T = TFromD<D>;
// Prevents error if size to allocate is zero.
AlignedFreeUniquePtr<T[]> pa =
AllocateAligned<T>(HWY_MAX(1, misalign_a + count));
T* a = pa.get() + misalign_a;
for (size_t i = 0; i < count; ++i) {
a[i] = Random7Bit<T>(rng);
}
AlignedFreeUniquePtr<T[]> pb =
AllocateAligned<T>(HWY_MAX(1, misalign_b + count));
T* b = pb.get() + misalign_b;
Copy(d, a, count, b);
const auto info = hwy::detail::MakeTypeInfo<T>();
const char* target_name = hwy::TargetName(HWY_TARGET);
hwy::detail::AssertArrayEqual(info, a, b, count, target_name, __FILE__,
__LINE__);
}
};
void TestAllCopy() {
ForAllTypes(ForPartialVectors<ForeachCountAndMisalign<TestCopy>>());
}
struct TestCopyIf {
template <class D>
void operator()(D d, size_t count, size_t misalign_a, size_t misalign_b,
RandomState& rng) {
using T = TFromD<D>;
// Prevents error if size to allocate is zero.
AlignedFreeUniquePtr<T[]> pa =
AllocateAligned<T>(HWY_MAX(1, misalign_a + count));
T* a = pa.get() + misalign_a;
for (size_t i = 0; i < count; ++i) {
a[i] = Random7Bit<T>(rng);
}
const size_t padding = Lanes(ScalableTag<T>());
AlignedFreeUniquePtr<T[]> pb =
AllocateAligned<T>(HWY_MAX(1, misalign_b + count + padding));
T* b = pb.get() + misalign_b;
AlignedFreeUniquePtr<T[]> expected = AllocateAligned<T>(HWY_MAX(1, count));
size_t num_odd = 0;
for (size_t i = 0; i < count; ++i) {
if (a[i] & 1) {
expected[num_odd++] = a[i];
}
}
#if HWY_GENERIC_LAMBDA
const auto is_odd = [](const auto d, const auto v) HWY_ATTR {
return TestBit(v, Set(d, TFromD<decltype(d)>{1}));
};
#else
const IsOdd is_odd;
#endif
T* end = CopyIf(d, a, count, b, is_odd);
const size_t num_written = static_cast<size_t>(end - b);
HWY_ASSERT_EQ(num_odd, num_written);
const auto info = hwy::detail::MakeTypeInfo<T>();
const char* target_name = hwy::TargetName(HWY_TARGET);
hwy::detail::AssertArrayEqual(info, expected.get(), b, num_odd, target_name,
__FILE__, __LINE__);
}
};
void TestAllCopyIf() {
ForUI163264(ForPartialVectors<ForeachCountAndMisalign<TestCopyIf>>());
}
// NOLINTNEXTLINE(google-readability-namespace-comments)
} // namespace HWY_NAMESPACE
} // namespace hwy
HWY_AFTER_NAMESPACE();
#if HWY_ONCE
namespace hwy {
HWY_BEFORE_TEST(CopyTest);
HWY_EXPORT_AND_TEST_P(CopyTest, TestAllFill);
HWY_EXPORT_AND_TEST_P(CopyTest, TestAllCopy);
HWY_EXPORT_AND_TEST_P(CopyTest, TestAllCopyIf);
} // namespace hwy
#endif
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