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[libc++] <experimental/simd> Add unary operators for class simd_mask #118468

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[libc++] <experimental/simd> Add unary operators for class simd_mask #118468

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0d51370
[libc++] <experimental/simd> Add unary operators for class simd_mask
joy2myself Apr 23, 2024
3515b73
Merge branch 'main' into mask_unary
joy2myself Mar 8, 2025
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1 change: 1 addition & 0 deletions libcxx/docs/Status/ParallelismProjects.csv
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Expand Up @@ -39,5 +39,6 @@ Section,Description,Dependencies,Assignee,Complete
| `[parallel.simd.mask.class] <https://wg21.link/N4808>`_, "`simd_mask load constructor <https://github.com/llvm/llvm-project/pull/76610>`_", None, Yin Zhang, |Complete|
| `[parallel.simd.mask.class] <https://wg21.link/N4808>`_, "`simd_mask subscript operators <https://github.com/llvm/llvm-project/pull/68960>`_", None, Yin Zhang, |Complete|
| `[parallel.simd.mask.class] <https://wg21.link/N4808>`_, "`simd_mask copy functions <https://github.com/llvm/llvm-project/pull/78935>`_", None, Yin Zhang, |Complete|
| `[parallel.simd.mask.class] <https://wg21.link/N4808>`_, "`simd_mask unary operators <https://github.com/llvm/llvm-project/pull/118468>`_", None, Yin Zhang, |Complete|
| `[parallel.simd.mask.class] <https://wg21.link/N4808>`_, "Class template simd_mask implementation", None, Yin Zhang, |In Progress|
| `[parallel.simd.mask.nonmembers] <https://wg21.link/N4808>`_, "simd_mask non-member operations", None, Yin Zhang, |In Progress|
2 changes: 2 additions & 0 deletions libcxx/include/experimental/__simd/scalar.h
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Expand Up @@ -93,6 +93,8 @@ struct __mask_operations<_Tp, simd_abi::__scalar> {
static _LIBCPP_HIDE_FROM_ABI void __load(_MaskStorage& __s, const bool* __mem) noexcept { __s.__data = __mem[0]; }

static _LIBCPP_HIDE_FROM_ABI void __store(_MaskStorage __s, bool* __mem) noexcept { __mem[0] = __s.__data; }

static _LIBCPP_HIDE_FROM_ABI _MaskStorage __negate(_MaskStorage __s) noexcept { return {{!__s.__data}}; }
};

} // namespace parallelism_v2
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3 changes: 3 additions & 0 deletions libcxx/include/experimental/__simd/simd_mask.h
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Expand Up @@ -79,6 +79,9 @@ class simd_mask {
// scalar access [simd.mask.subscr]
_LIBCPP_HIDE_FROM_ABI reference operator[](size_t __i) noexcept { return reference(__s_, __i); }
_LIBCPP_HIDE_FROM_ABI value_type operator[](size_t __i) const noexcept { return __s_.__get(__i); }

// unary operators
_LIBCPP_HIDE_FROM_ABI simd_mask operator!() const noexcept { return simd_mask(_Impl::__negate(__s_), __storage_tag); }
};

template <class _Tp, class _Abi>
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2 changes: 2 additions & 0 deletions libcxx/include/experimental/__simd/vec_ext.h
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Expand Up @@ -121,6 +121,8 @@ struct __mask_operations<_Tp, simd_abi::__vec_ext<_Np>> {
for (size_t __i = 0; __i < _Np; __i++)
__mem[__i] = static_cast<bool>(__s.__data[__i]);
}

static _LIBCPP_HIDE_FROM_ABI _MaskStorage __negate(_MaskStorage __s) noexcept { return {{~__s.__data}}; }
};

} // namespace parallelism_v2
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38 changes: 38 additions & 0 deletions libcxx/test/std/experimental/simd/simd.mask.class/simd_mask_unary.pass.cpp
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@@ -0,0 +1,38 @@
//===----------------------------------------------------------------------===//
//
// 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.class]
// simd_mask operator!() const noexcept;

#include "../test_utils.h"
#include <algorithm>
#include <experimental/simd>

namespace ex = std::experimental::parallelism_v2;

template <class T, std::size_t>
struct CheckSimdMaskNotOperator {
template <class SimdAbi>
void operator()() {
constexpr std::size_t array_size = ex::simd_size_v<T, SimdAbi>;
ex::simd_mask<T, SimdAbi> origin_mask(true);
static_assert(noexcept(!origin_mask));
std::array<bool, array_size> expected_value;
std::fill(expected_value.begin(), expected_value.end(), false);
assert_simd_mask_values_equal<array_size>(!origin_mask, expected_value);
}
};

int main(int, char**) {
test_all_simd_abi<CheckSimdMaskNotOperator>();
return 0;
}