[libcxx-commits] [libcxx] [libc++] Implement P2876R3: std::simd constructors and accessors (PR #177216)

[Hristo Hristov via libcxx-commits]

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@@ -0,0 +1,48 @@
+//===----------------------------------------------------------------------===//
+//
+// 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.mask.ctor]
+// constexpr simd_mask(const bitset<size()>& b) noexcept;
+
+#include "../test_utils.h"
+#include <bitset>
+
+namespace ex = std::experimental::parallelism_v2;
+
+template <class T, std::size_t>
+struct CheckSimdMaskCtorBitset {
+  template <class SimdAbi>
+  void operator()() {
+    constexpr std::size_t array_size = ex::simd_size_v<T, SimdAbi>;
+    
+    std::bitset<array_size> b;
+    bool expected_buffer[array_size];
+
+    for (size_t i = 0; i < array_size; ++i) {
+      bool val = (i % 2 == 0);
+      if (val) 
+        b[i] = true;
+      expected_buffer[i] = val;
+    }
+
+    // Construct mask
+    ex::simd_mask<T, SimdAbi> mask(b);
+
+    assert_simd_mask_values_equal(mask, expected_buffer);
+    static_assert(noexcept(ex::simd_mask<T, SimdAbi>(b)));
+  }
+};
+
+int main(int, char**) {
+  test_all_simd_abi<CheckSimdMaskCtorBitset>();
+  return 0;
+}
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Zingam wrote:

Plrase insert a new line at the end of files.

https://github.com/llvm/llvm-project/pull/177216