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//===-- Unittests for cpp::simd -------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/__support/CPP/simd.h"
#include "src/__support/CPP/utility.h"
#include "test/UnitTest/Test.h"
static_assert(LIBC_HAS_VECTOR_TYPE, "compiler needs ext_vector_type support");
using namespace LIBC_NAMESPACE;
TEST(LlvmLibcSIMDTest, Basic) {}
TEST(LlvmLibcSIMDTest, VectorCreation) {
cpp::simd<int> v1 = cpp::splat(5);
cpp::simd<int> v2 = cpp::iota<int>();
EXPECT_EQ(v1[0], 5);
EXPECT_EQ(v2[0], 0);
}
TEST(LlvmLibcSIMDTest, TypeTraits) {
cpp::simd<int> v1 = cpp::splat(0);
static_assert(cpp::is_simd_v<decltype(v1)>, "v1 should be a SIMD type");
static_assert(!cpp::is_simd_v<int>, "int is not a SIMD type");
static_assert(cpp::is_simd_mask_v<cpp::simd<bool, 4>>,
"should be a SIMD mask");
using Elem = cpp::simd_element_type_t<decltype(v1)>;
static_assert(cpp::is_same_v<Elem, int>, "element type should be int");
}
TEST(LlvmLibcSIMDTest, ElementwiseOperations) {
cpp::simd<int> vi1 = cpp::splat(1);
cpp::simd<int> vi2 = cpp::splat(-1);
cpp::simd<int> v_abs = cpp::abs(vi2);
cpp::simd<int> v_min = cpp::min(vi1, vi2);
cpp::simd<int> v_max = cpp::max(vi1, vi2);
EXPECT_EQ(v_abs[0], 1);
EXPECT_EQ(v_min[0], -1);
EXPECT_EQ(v_max[0], 1);
}
TEST(LlvmLibcSIMDTest, ReductionOperations) {
cpp::simd<int> v = cpp::splat(1);
int sum = cpp::reduce(v);
int prod = cpp::reduce(v, cpp::multiplies<>{});
EXPECT_EQ(sum, static_cast<int>(cpp::simd_size_v<decltype(v)>));
EXPECT_EQ(prod, 1);
}
TEST(LlvmLibcSIMDTest, MaskOperations) {
cpp::simd<bool, 8> mask{true, false, true, false, false, false, false, false};
EXPECT_TRUE(cpp::any_of(mask));
EXPECT_FALSE(cpp::all_of(mask));
EXPECT_FALSE(cpp::none_of(mask));
EXPECT_TRUE(cpp::some_of(mask));
EXPECT_EQ(cpp::find_first_set(mask), 0);
EXPECT_EQ(cpp::find_last_set(mask), 2);
EXPECT_EQ(cpp::popcount(mask), 2);
}
TEST(LlvmLibcSIMDTest, SplitConcat) {
cpp::simd<char, 8> v{1, 1, 2, 2, 3, 3, 4, 4};
auto [v1, v2, v3, v4] = cpp::split<2, 2, 2, 2>(v);
EXPECT_TRUE(cpp::all_of(v1 == 1));
EXPECT_TRUE(cpp::all_of(v2 == 2));
EXPECT_TRUE(cpp::all_of(v3 == 3));
EXPECT_TRUE(cpp::all_of(v4 == 4));
cpp::simd<char, 8> m = cpp::concat(v1, v2, v3, v4);
EXPECT_TRUE(cpp::all_of(m == v));
cpp::simd<char, 1> c(~0);
cpp::simd<char, 8> n = cpp::concat(c, c, c, c, c, c, c, c);
EXPECT_TRUE(cpp::all_of(n == ~0));
}
TEST(LlvmLibcSIMDTest, LoadStore) {
constexpr size_t SIZE = cpp::simd_size_v<cpp::simd<int>>;
alignas(alignof(cpp::simd<int>)) int buf[SIZE];
cpp::simd<int> v1 = cpp::splat(1);
cpp::store(v1, buf);
cpp::simd<int> v2 = cpp::load<cpp::simd<int>>(buf);
EXPECT_TRUE(cpp::all_of(v1 == 1));
EXPECT_TRUE(cpp::all_of(v2 == 1));
cpp::simd<int> v3 = cpp::splat(2);
cpp::store(v3, buf, /*aligned=*/true);
cpp::simd<int> v4 = cpp::load<cpp::simd<int>>(buf, /*aligned=*/true);
EXPECT_TRUE(cpp::all_of(v3 == 2));
EXPECT_TRUE(cpp::all_of(v4 == 2));
}
TEST(LlvmLibcSIMDTest, MaskedLoadStore) {
constexpr size_t SIZE = cpp::simd_size_v<cpp::simd<int>>;
alignas(alignof(cpp::simd<int>)) int buf[SIZE] = {0};
cpp::simd<int> mask = cpp::iota(0) % 2 == 0;
cpp::simd<int> v1 = cpp::splat(1);
cpp::store_masked<cpp::simd<int>>(mask, v1, buf);
cpp::simd<int> v2 = cpp::load_masked<cpp::simd<int>>(mask, buf);
EXPECT_TRUE(cpp::all_of((v2 == 1) == mask));
}
TEST(LlvmLibcSIMDTest, GatherScatter) {
constexpr int SIZE = cpp::simd_size_v<cpp::simd<int>>;
alignas(alignof(cpp::simd<int>)) int buf[SIZE];
cpp::simd<int> mask = cpp::iota(1);
cpp::simd<int> idx = cpp::iota(0);
cpp::simd<int> v1 = cpp::splat(1);
cpp::scatter<cpp::simd<int>>(mask, idx, v1, buf);
cpp::simd<int> v2 = cpp::gather<cpp::simd<int>>(mask, idx, buf);
EXPECT_TRUE(cpp::all_of(v1 == 1));
EXPECT_TRUE(cpp::all_of(v2 == 1));
}
TEST(LlvmLibcSIMDTest, MaskedCompressExpand) {
constexpr size_t SIZE = cpp::simd_size_v<cpp::simd<int>>;
alignas(alignof(cpp::simd<int>)) int buf[SIZE] = {0};
cpp::simd<int> mask_expand = cpp::iota(0) % 2 == 0;
cpp::simd<int> mask_compress = 1;
cpp::simd<int> v1 = cpp::iota(0);
cpp::compress<cpp::simd<int>>(mask_compress, v1, buf);
cpp::simd<int> v2 = cpp::expand<cpp::simd<int>>(mask_expand, buf);
EXPECT_TRUE(cpp::all_of(!mask_expand || v2 <= SIZE / 2));
}
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