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-rw-r--r--third_party/highway/hwy/tests/swizzle_test.cc272
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diff --git a/third_party/highway/hwy/tests/swizzle_test.cc b/third_party/highway/hwy/tests/swizzle_test.cc
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+++ b/third_party/highway/hwy/tests/swizzle_test.cc
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+// Copyright 2019 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 <stddef.h>
+#include <string.h> // memset
+
+#include "hwy/base.h"
+
+#undef HWY_TARGET_INCLUDE
+#define HWY_TARGET_INCLUDE "tests/swizzle_test.cc"
+#include "hwy/foreach_target.h" // IWYU pragma: keep
+#include "hwy/highway.h"
+#include "hwy/tests/test_util-inl.h"
+
+HWY_BEFORE_NAMESPACE();
+namespace hwy {
+namespace HWY_NAMESPACE {
+
+struct TestGetLane {
+ template <class T, class D>
+ HWY_NOINLINE void operator()(T /*unused*/, D d) {
+ const auto v = Iota(d, T(1));
+ HWY_ASSERT_EQ(T(1), GetLane(v));
+ }
+};
+
+HWY_NOINLINE void TestAllGetLane() {
+ ForAllTypes(ForPartialVectors<TestGetLane>());
+}
+
+struct TestExtractLane {
+ template <class T, class D>
+ HWY_NOINLINE void operator()(T /*unused*/, D d) {
+ const auto v = Iota(d, T(1));
+ for (size_t i = 0; i < Lanes(d); ++i) {
+ const T actual = ExtractLane(v, i);
+ HWY_ASSERT_EQ(static_cast<T>(i + 1), actual);
+ }
+ }
+};
+
+HWY_NOINLINE void TestAllExtractLane() {
+ ForAllTypes(ForPartialVectors<TestExtractLane>());
+}
+
+struct TestInsertLane {
+ template <class T, class D>
+ HWY_NOINLINE void operator()(T /*unused*/, D d) {
+ using V = Vec<D>;
+ const V v = Iota(d, T(1));
+ const size_t N = Lanes(d);
+ auto lanes = AllocateAligned<T>(N);
+ Store(v, d, lanes.get());
+
+ for (size_t i = 0; i < Lanes(d); ++i) {
+ lanes[i] = T{0};
+ const V actual = InsertLane(v, i, static_cast<T>(i + 1));
+ HWY_ASSERT_VEC_EQ(d, v, actual);
+ Store(v, d, lanes.get()); // restore lane i
+ }
+ }
+};
+
+HWY_NOINLINE void TestAllInsertLane() {
+ ForAllTypes(ForPartialVectors<TestInsertLane>());
+}
+
+struct TestDupEven {
+ template <class T, class D>
+ HWY_NOINLINE void operator()(T /*unused*/, D d) {
+ const size_t N = Lanes(d);
+ auto expected = AllocateAligned<T>(N);
+ for (size_t i = 0; i < N; ++i) {
+ expected[i] = static_cast<T>((static_cast<int>(i) & ~1) + 1);
+ }
+ HWY_ASSERT_VEC_EQ(d, expected.get(), DupEven(Iota(d, 1)));
+ }
+};
+
+HWY_NOINLINE void TestAllDupEven() {
+ ForUIF3264(ForShrinkableVectors<TestDupEven>());
+}
+
+struct TestDupOdd {
+ template <class T, class D>
+ HWY_NOINLINE void operator()(T /*unused*/, D d) {
+#if HWY_TARGET != HWY_SCALAR
+ const size_t N = Lanes(d);
+ auto expected = AllocateAligned<T>(N);
+ for (size_t i = 0; i < N; ++i) {
+ expected[i] = static_cast<T>((static_cast<int>(i) & ~1) + 2);
+ }
+ HWY_ASSERT_VEC_EQ(d, expected.get(), DupOdd(Iota(d, 1)));
+#else
+ (void)d;
+#endif
+ }
+};
+
+HWY_NOINLINE void TestAllDupOdd() {
+ ForUIF3264(ForShrinkableVectors<TestDupOdd>());
+}
+
+struct TestOddEven {
+ template <class T, class D>
+ HWY_NOINLINE void operator()(T /*unused*/, D d) {
+ const size_t N = Lanes(d);
+ const auto even = Iota(d, 1);
+ const auto odd = Iota(d, static_cast<T>(1 + N));
+ auto expected = AllocateAligned<T>(N);
+ for (size_t i = 0; i < N; ++i) {
+ expected[i] = static_cast<T>(1 + i + ((i & 1) ? N : 0));
+ }
+ HWY_ASSERT_VEC_EQ(d, expected.get(), OddEven(odd, even));
+ }
+};
+
+HWY_NOINLINE void TestAllOddEven() {
+ ForAllTypes(ForShrinkableVectors<TestOddEven>());
+}
+
+struct TestOddEvenBlocks {
+ template <class T, class D>
+ HWY_NOINLINE void operator()(T /*unused*/, D d) {
+ const size_t N = Lanes(d);
+ const auto even = Iota(d, 1);
+ const auto odd = Iota(d, static_cast<T>(1 + N));
+ auto expected = AllocateAligned<T>(N);
+ for (size_t i = 0; i < N; ++i) {
+ const size_t idx_block = i / (16 / sizeof(T));
+ expected[i] = static_cast<T>(1 + i + ((idx_block & 1) ? N : 0));
+ }
+ HWY_ASSERT_VEC_EQ(d, expected.get(), OddEvenBlocks(odd, even));
+ }
+};
+
+HWY_NOINLINE void TestAllOddEvenBlocks() {
+ ForAllTypes(ForGEVectors<128, TestOddEvenBlocks>());
+}
+
+struct TestSwapAdjacentBlocks {
+ template <class T, class D>
+ HWY_NOINLINE void operator()(T /*unused*/, D d) {
+ const size_t N = Lanes(d);
+ constexpr size_t kLanesPerBlock = 16 / sizeof(T);
+ if (N < 2 * kLanesPerBlock) return;
+ const auto vi = Iota(d, 1);
+ auto expected = AllocateAligned<T>(N);
+ for (size_t i = 0; i < N; ++i) {
+ const size_t idx_block = i / kLanesPerBlock;
+ const size_t base = (idx_block ^ 1) * kLanesPerBlock;
+ const size_t mod = i % kLanesPerBlock;
+ expected[i] = static_cast<T>(1 + base + mod);
+ }
+ HWY_ASSERT_VEC_EQ(d, expected.get(), SwapAdjacentBlocks(vi));
+ }
+};
+
+HWY_NOINLINE void TestAllSwapAdjacentBlocks() {
+ ForAllTypes(ForGEVectors<128, TestSwapAdjacentBlocks>());
+}
+
+struct TestTableLookupLanes {
+ template <class T, class D>
+ HWY_NOINLINE void operator()(T /*unused*/, D d) {
+ const RebindToSigned<D> di;
+ using TI = TFromD<decltype(di)>;
+#if HWY_TARGET != HWY_SCALAR
+ const size_t N = Lanes(d);
+ auto idx = AllocateAligned<TI>(N);
+ memset(idx.get(), 0, N * sizeof(TI));
+ auto expected = AllocateAligned<T>(N);
+ const auto v = Iota(d, 1);
+
+ if (N <= 8) { // Test all permutations
+ for (size_t i0 = 0; i0 < N; ++i0) {
+ idx[0] = static_cast<TI>(i0);
+
+ for (size_t i1 = 0; i1 < N; ++i1) {
+ if (N >= 2) idx[1] = static_cast<TI>(i1);
+ for (size_t i2 = 0; i2 < N; ++i2) {
+ if (N >= 4) idx[2] = static_cast<TI>(i2);
+ for (size_t i3 = 0; i3 < N; ++i3) {
+ if (N >= 4) idx[3] = static_cast<TI>(i3);
+
+ for (size_t i = 0; i < N; ++i) {
+ expected[i] = static_cast<T>(idx[i] + 1); // == v[idx[i]]
+ }
+
+ const auto opaque1 = IndicesFromVec(d, Load(di, idx.get()));
+ const auto actual1 = TableLookupLanes(v, opaque1);
+ HWY_ASSERT_VEC_EQ(d, expected.get(), actual1);
+
+ const auto opaque2 = SetTableIndices(d, idx.get());
+ const auto actual2 = TableLookupLanes(v, opaque2);
+ HWY_ASSERT_VEC_EQ(d, expected.get(), actual2);
+ }
+ }
+ }
+ }
+ } else {
+ // Too many permutations to test exhaustively; choose one with repeated
+ // and cross-block indices and ensure indices do not exceed #lanes.
+ // For larger vectors, upper lanes will be zero.
+ HWY_ALIGN TI idx_source[16] = {1, 3, 2, 2, 8, 1, 7, 6,
+ 15, 14, 14, 15, 4, 9, 8, 5};
+ for (size_t i = 0; i < N; ++i) {
+ idx[i] = (i < 16) ? idx_source[i] : 0;
+ // Avoid undefined results / asan error for scalar by capping indices.
+ if (idx[i] >= static_cast<TI>(N)) {
+ idx[i] = static_cast<TI>(N - 1);
+ }
+ expected[i] = static_cast<T>(idx[i] + 1); // == v[idx[i]]
+ }
+
+ const auto opaque1 = IndicesFromVec(d, Load(di, idx.get()));
+ const auto actual1 = TableLookupLanes(v, opaque1);
+ HWY_ASSERT_VEC_EQ(d, expected.get(), actual1);
+
+ const auto opaque2 = SetTableIndices(d, idx.get());
+ const auto actual2 = TableLookupLanes(v, opaque2);
+ HWY_ASSERT_VEC_EQ(d, expected.get(), actual2);
+ }
+#else
+ const TI index = 0;
+ const auto v = Set(d, 1);
+ const auto opaque1 = SetTableIndices(d, &index);
+ HWY_ASSERT_VEC_EQ(d, v, TableLookupLanes(v, opaque1));
+ const auto opaque2 = IndicesFromVec(d, Zero(di));
+ HWY_ASSERT_VEC_EQ(d, v, TableLookupLanes(v, opaque2));
+#endif
+ }
+};
+
+HWY_NOINLINE void TestAllTableLookupLanes() {
+ ForUIF3264(ForPartialVectors<TestTableLookupLanes>());
+}
+
+
+// NOLINTNEXTLINE(google-readability-namespace-comments)
+} // namespace HWY_NAMESPACE
+} // namespace hwy
+HWY_AFTER_NAMESPACE();
+
+#if HWY_ONCE
+
+namespace hwy {
+HWY_BEFORE_TEST(HwySwizzleTest);
+HWY_EXPORT_AND_TEST_P(HwySwizzleTest, TestAllGetLane);
+HWY_EXPORT_AND_TEST_P(HwySwizzleTest, TestAllExtractLane);
+HWY_EXPORT_AND_TEST_P(HwySwizzleTest, TestAllInsertLane);
+HWY_EXPORT_AND_TEST_P(HwySwizzleTest, TestAllDupEven);
+HWY_EXPORT_AND_TEST_P(HwySwizzleTest, TestAllDupOdd);
+HWY_EXPORT_AND_TEST_P(HwySwizzleTest, TestAllOddEven);
+HWY_EXPORT_AND_TEST_P(HwySwizzleTest, TestAllOddEvenBlocks);
+HWY_EXPORT_AND_TEST_P(HwySwizzleTest, TestAllSwapAdjacentBlocks);
+HWY_EXPORT_AND_TEST_P(HwySwizzleTest, TestAllTableLookupLanes);
+} // namespace hwy
+
+#endif
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