[libcxx-commits] [libcxx] [libc++] <experimental/simd> Add load constructor for class simd/simd_mask (PR #76610)

[Nikolas Klauser via libcxx-commits]

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@@ -0,0 +1,80 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14
+
+// <experimental/simd>
+//
+// [simd.class]
+// template<class Flags> simd_mask(const value_type* mem, Flags);
+
+#include "../test_utils.h"
+
+namespace ex = std::experimental::parallelism_v2;
+
+template <class T, std::size_t>
+struct CheckSimdMaskLoadCtor {
+  template <class SimdAbi>
+  void operator()() {
+    constexpr std::size_t array_size = ex::simd_size_v<T, SimdAbi>;
+
+    // element aligned tag
+    constexpr std::size_t element_alignas_size = alignof(bool);
+    alignas(element_alignas_size) bool element_buffer[array_size];
+    for (size_t i = 0; i < array_size; ++i)
+      element_buffer[i] = static_cast<bool>(i % 2);
+    ex::simd_mask<T, SimdAbi> element_mask(element_buffer, ex::element_aligned_tag());
+    assert_simd_mask_values_equal(element_mask, element_buffer);
+
+    // vector aligned tag
+    constexpr std::size_t vector_alignas_size = ex::memory_alignment_v<ex::simd_mask<T, SimdAbi>>;
+    alignas(vector_alignas_size) bool vector_buffer[array_size];
+    for (size_t i = 0; i < array_size; ++i)
+      vector_buffer[i] = static_cast<bool>(i % 2);
+    ex::simd_mask<T, SimdAbi> vector_mask(vector_buffer, ex::vector_aligned_tag());
+    assert_simd_mask_values_equal(vector_mask, vector_buffer);
+
+    // overaligned tag
+    constexpr std::size_t over_alignas_size = bit_ceil(sizeof(bool) + 1);
+    alignas(over_alignas_size) bool overaligned_buffer[array_size];
+    for (size_t i = 0; i < array_size; ++i)
+      overaligned_buffer[i] = static_cast<bool>(i % 2);
+    ex::simd_mask<T, SimdAbi> overaligned_mask(overaligned_buffer, ex::overaligned_tag<over_alignas_size>());
+    assert_simd_mask_values_equal(overaligned_mask, overaligned_buffer);
+  }
+};
+
+template <class T, class Flags, class SimdAbi = ex::simd_abi::compatible<T>, class = void>
+struct has_load_ctor : std::false_type {};
+
+template <class T, class Flags, class SimdAbi>
+struct has_load_ctor<T,
+                     Flags,
+                     SimdAbi,
+                     std::void_t<decltype(ex::simd_mask<T, SimdAbi>(std::declval<const bool*>(), Flags()))>>
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philnik777 wrote:

Same here.

https://github.com/llvm/llvm-project/pull/76610