libcxx/include/experimental/__simd/declaration.h

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef _LIBCPP_EXPERIMENTAL___SIMD_DECLARATION_H
  11 #define _LIBCPP_EXPERIMENTAL___SIMD_DECLARATION_H
  12
  13 #include <__config>
  14 #include <__cstddef/size_t.h>
  15
  16 #if _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
  17
  18 // TODO: support more targets
  19 #  if defined(__AVX__)
  20 #    define _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES 32
  21 #  else
  22 #    define _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES 16
  23 #  endif
  24
  25 _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL
  26 inline namespace parallelism_v2 {
  27 namespace simd_abi {
  28 template <int>
  29 struct __vec_ext;
  30 struct __scalar;
  31
  32 using scalar = __scalar;
  33
  34 // TODO: make this platform dependent
  35 template <int _Np>
  36 using fixed_size = __vec_ext<_Np>;
  37
  38 template <class _Tp>
  39 inline constexpr int max_fixed_size = 32;
  40
  41 // TODO: make this platform dependent
  42 template <class _Tp>
  43 using compatible = __vec_ext<16 / sizeof(_Tp)>;
  44
  45 // TODO: make this platform dependent
  46 template <class _Tp>
  47 using native = __vec_ext<_LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES / sizeof(_Tp)>;
  48
  49 // TODO: make this platform dependent
  50 template <class _Tp, size_t _Np, class... _Abis>
  51 struct deduce {
  52   using type = fixed_size<_Np>;
  53 };
  54
  55 // TODO: make this platform dependent
  56 template <class _Tp, size_t _Np, class... _Abis>
  57 using deduce_t = typename deduce<_Tp, _Np, _Abis...>::type;
  58
  59 } // namespace simd_abi
  60
  61 template <class _Tp, class _Abi>
  62 struct __simd_storage;
  63
  64 template <class _Tp, class _Abi>
  65 struct __mask_storage;
  66
  67 template <class _Tp, class _Abi>
  68 struct __simd_operations;
  69
  70 template <class _Tp, class _Abi>
  71 struct __mask_operations;
  72
  73 struct element_aligned_tag;
  74 struct vector_aligned_tag;
  75 template <size_t>
  76 struct overaligned_tag;
  77
  78 template <class _Tp, class _Abi = simd_abi::compatible<_Tp>>
  79 class simd;
  80
  81 template <class _Tp, class _Abi = simd_abi::compatible<_Tp>>
  82 class simd_mask;
  83
  84 } // namespace parallelism_v2
  85 _LIBCPP_END_NAMESPACE_EXPERIMENTAL
  86
  87 #endif // _LIBCPP_STD_VER >= 17 && defined(_LIBCPP_ENABLE_EXPERIMENTAL)
  88 #endif // _LIBCPP_EXPERIMENTAL___SIMD_DECLARATION_H