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156ab87500
See: * https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319 * https://discourse.llvm.org/t/rfc-project-hand-in-hand-llvm-libc-libc-code-sharing/77701 We're dropping support for C++03 for Zig due to the first change; it would be insane to ship 1018 duplicate header files just for this outdated use case. As a result of the second change, I had to bring in a subset of the headers from llvm-libc since libc++ now depends on these. Hopefully we can continue to get away with not copying the entirety of llvm-libc.
88 lines
2.3 KiB
C++
Vendored
88 lines
2.3 KiB
C++
Vendored
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_EXPERIMENTAL___SIMD_DECLARATION_H
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#define _LIBCPP_EXPERIMENTAL___SIMD_DECLARATION_H
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#include <__config>
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#include <__cstddef/size_t.h>
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#if _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
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// TODO: support more targets
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# if defined(__AVX__)
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# define _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES 32
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# else
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# define _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES 16
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# endif
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_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL
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inline namespace parallelism_v2 {
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namespace simd_abi {
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template <int>
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struct __vec_ext;
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struct __scalar;
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using scalar = __scalar;
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// TODO: make this platform dependent
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template <int _Np>
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using fixed_size = __vec_ext<_Np>;
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template <class _Tp>
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inline constexpr int max_fixed_size = 32;
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// TODO: make this platform dependent
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template <class _Tp>
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using compatible = __vec_ext<16 / sizeof(_Tp)>;
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// TODO: make this platform dependent
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template <class _Tp>
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using native = __vec_ext<_LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES / sizeof(_Tp)>;
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// TODO: make this platform dependent
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template <class _Tp, size_t _Np, class... _Abis>
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struct deduce {
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using type = fixed_size<_Np>;
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};
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// TODO: make this platform dependent
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template <class _Tp, size_t _Np, class... _Abis>
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using deduce_t = typename deduce<_Tp, _Np, _Abis...>::type;
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} // namespace simd_abi
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template <class _Tp, class _Abi>
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struct __simd_storage;
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template <class _Tp, class _Abi>
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struct __mask_storage;
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template <class _Tp, class _Abi>
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struct __simd_operations;
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template <class _Tp, class _Abi>
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struct __mask_operations;
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struct element_aligned_tag;
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struct vector_aligned_tag;
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template <size_t>
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struct overaligned_tag;
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template <class _Tp, class _Abi = simd_abi::compatible<_Tp>>
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class simd;
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template <class _Tp, class _Abi = simd_abi::compatible<_Tp>>
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class simd_mask;
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} // namespace parallelism_v2
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_LIBCPP_END_NAMESPACE_EXPERIMENTAL
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#endif // _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
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#endif // _LIBCPP_EXPERIMENTAL___SIMD_DECLARATION_H
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