Restoring authorship annotation for <thegeorg@yandex-team.ru>. Commit 1 of 2.

1 files changed, 1222 insertions, 1222 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/experimental/simd b/contrib/libs/cxxsupp/libcxx/include/experimental/simd
index 59a7139585..782f82cda8 100644
--- a/contrib/libs/cxxsupp/libcxx/include/experimental/simd
+++ b/contrib/libs/cxxsupp/libcxx/include/experimental/simd
@@ -1,684 +1,684 @@
-// -*- C++ -*-
-//===------------------------------- simd ---------------------------------===//
-//
+// -*- C++ -*- 
+//===------------------------------- simd ---------------------------------===// 
+// 
 // 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
-//
-//===----------------------------------------------------------------------===//
-#ifndef _LIBCPP_EXPERIMENTAL_SIMD
-#define _LIBCPP_EXPERIMENTAL_SIMD
-
-/*
-    experimental/simd synopsis
-
-namespace std::experimental {
-
-inline namespace parallelism_v2 {
-
-namespace simd_abi {
-
-struct scalar {};
-template <int N> struct fixed_size {};
-template <typename T> inline constexpr int max_fixed_size = implementation-defined;
-template <typename T> using compatible = implementation-defined;
-template <typename T> using native = implementation-defined;
-
-} // simd_abi
-
-struct element_aligned_tag {};
-struct vector_aligned_tag {};
-template <size_t> struct overaligned_tag {};
-inline constexpr element_aligned_tag element_aligned{};
-inline constexpr vector_aligned_tag vector_aligned{};
-template <size_t N> inline constexpr overaligned_tag<N> overaligned{};
-
-// traits [simd.traits]
-template <class T> struct is_abi_tag;
-template <class T> inline constexpr bool is_abi_tag_v = is_abi_tag<T>::value;
-
-template <class T> struct is_simd;
-template <class T> inline constexpr bool is_simd_v = is_simd<T>::value;
-
-template <class T> struct is_simd_mask;
-template <class T> inline constexpr bool is_simd_mask_v = is_simd_mask<T>::value;
-
-template <class T> struct is_simd_flag_type;
-template <class T> inline constexpr bool is_simd_flag_type_v = is_simd_flag_type<T>::value;
-
-template <class T, size_t N> struct abi_for_size { using type = see below; };
-template <class T, size_t N> using abi_for_size_t = typename abi_for_size<T, N>::type;
-
-template <class T, class Abi = simd_abi::compatible<T>> struct simd_size;
-template <class T, class Abi = simd_abi::compatible<T>>
-inline constexpr size_t simd_size_v = simd_size<T, Abi>::value;
-
-template <class T, class U = typename T::value_type> struct memory_alignment;
-template <class T, class U = typename T::value_type>
-inline constexpr size_t memory_alignment_v = memory_alignment<T, U>::value;
-
-// class template simd [simd.class]
-template <class T, class Abi = simd_abi::compatible<T>> class simd;
-template <class T> using native_simd = simd<T, simd_abi::native<T>>;
-template <class T, int N> using fixed_size_simd = simd<T, simd_abi::fixed_size<N>>;
-
-// class template simd_mask [simd.mask.class]
-template <class T, class Abi = simd_abi::compatible<T>> class simd_mask;
-template <class T> using native_simd_mask = simd_mask<T, simd_abi::native<T>>;
-template <class T, int N> using fixed_size_simd_mask = simd_mask<T, simd_abi::fixed_size<N>>;
-
-// casts [simd.casts]
-template <class T, class U, class Abi> see below simd_cast(const simd<U, Abi>&);
-template <class T, class U, class Abi> see below static_simd_cast(const simd<U, Abi>&);
-
-template <class T, class Abi>
-fixed_size_simd<T, simd_size_v<T, Abi>> to_fixed_size(const simd<T, Abi>&) noexcept;
-template <class T, class Abi>
-fixed_size_simd_mask<T, simd_size_v<T, Abi>> to_fixed_size(const simd_mask<T, Abi>&) noexcept;
-template <class T, size_t N> native_simd<T> to_native(const fixed_size_simd<T, N>&) noexcept;
-template <class T, size_t N>
-native_simd_mask<T> to_native(const fixed_size_simd_mask<T, N>> &) noexcept;
-template <class T, size_t N> simd<T> to_compatible(const fixed_size_simd<T, N>&) noexcept;
-template <class T, size_t N> simd_mask<T> to_compatible(const fixed_size_simd_mask<T, N>&) noexcept;
-
-template <size_t... Sizes, class T, class Abi>
-tuple<simd<T, abi_for_size_t<Sizes>>...> split(const simd<T, Abi>&);
-template <size_t... Sizes, class T, class Abi>
-tuple<simd_mask<T, abi_for_size_t<Sizes>>...> split(const simd_mask<T, Abi>&);
-template <class V, class Abi>
-array<V, simd_size_v<typename V::value_type, Abi> / V::size()> split(
-const simd<typename V::value_type, Abi>&);
-template <class V, class Abi>
-array<V, simd_size_v<typename V::value_type, Abi> / V::size()> split(
-const simd_mask<typename V::value_type, Abi>&);
-
-template <class T, class... Abis>
-simd<T, abi_for_size_t<T, (simd_size_v<T, Abis> + ...)>> concat(const simd<T, Abis>&...);
-template <class T, class... Abis>
-simd_mask<T, abi_for_size_t<T, (simd_size_v<T, Abis> + ...)>> concat(const simd_mask<T, Abis>&...);
-
-// reductions [simd.mask.reductions]
-template <class T, class Abi> bool all_of(const simd_mask<T, Abi>&) noexcept;
-template <class T, class Abi> bool any_of(const simd_mask<T, Abi>&) noexcept;
-template <class T, class Abi> bool none_of(const simd_mask<T, Abi>&) noexcept;
-template <class T, class Abi> bool some_of(const simd_mask<T, Abi>&) noexcept;
-template <class T, class Abi> int popcount(const simd_mask<T, Abi>&) noexcept;
-template <class T, class Abi> int find_first_set(const simd_mask<T, Abi>&);
-template <class T, class Abi> int find_last_set(const simd_mask<T, Abi>&);
-
-bool all_of(see below) noexcept;
-bool any_of(see below) noexcept;
-bool none_of(see below) noexcept;
-bool some_of(see below) noexcept;
-int popcount(see below) noexcept;
-int find_first_set(see below) noexcept;
-int find_last_set(see below) noexcept;
-
-// masked assignment [simd.whereexpr]
-template <class M, class T> class const_where_expression;
-template <class M, class T> class where_expression;
-
-// masked assignment [simd.mask.where]
-template <class T> struct nodeduce { using type = T; }; // exposition only
-
-template <class T> using nodeduce_t = typename nodeduce<T>::type; // exposition only
-
-template <class T, class Abi>
-where_expression<simd_mask<T, Abi>, simd<T, Abi>>
-where(const typename simd<T, Abi>::mask_type&, simd<T, Abi>&) noexcept;
-
-template <class T, class Abi>
-const_where_expression<simd_mask<T, Abi>, const simd<T, Abi>>
-where(const typename simd<T, Abi>::mask_type&, const simd<T, Abi>&) noexcept;
-
-template <class T, class Abi>
-where_expression<simd_mask<T, Abi>, simd_mask<T, Abi>>
-where(const nodeduce_t<simd_mask<T, Abi>>&, simd_mask<T, Abi>&) noexcept;
-
-template <class T, class Abi>
-const_where_expression<simd_mask<T, Abi>, const simd_mask<T, Abi>>
-where(const nodeduce_t<simd_mask<T, Abi>>&, const simd_mask<T, Abi>&) noexcept;
-
-template <class T> where_expression<bool, T> where(see below k, T& d) noexcept;
-
-template <class T>
-const_where_expression<bool, const T> where(see below k, const T& d) noexcept;
-
-// reductions [simd.reductions]
-template <class T, class Abi, class BinaryOperation = std::plus<>>
-T reduce(const simd<T, Abi>&, BinaryOperation = BinaryOperation());
-
-template <class M, class V, class BinaryOperation>
-typename V::value_type reduce(const const_where_expression<M, V>& x,
-typename V::value_type neutral_element, BinaryOperation binary_op);
-
-template <class M, class V>
-typename V::value_type reduce(const const_where_expression<M, V>& x, plus<> binary_op = plus<>());
-
-template <class M, class V>
-typename V::value_type reduce(const const_where_expression<M, V>& x, multiplies<> binary_op);
-
-template <class M, class V>
-typename V::value_type reduce(const const_where_expression<M, V>& x, bit_and<> binary_op);
-
-template <class M, class V>
-typename V::value_type reduce(const const_where_expression<M, V>& x, bit_or<> binary_op);
-
-template <class M, class V>
-typename V::value_type reduce(const const_where_expression<M, V>& x, bit_xor<> binary_op);
-
-template <class T, class Abi> T hmin(const simd<T, Abi>&);
-template <class M, class V> T hmin(const const_where_expression<M, V>&);
-template <class T, class Abi> T hmax(const simd<T, Abi>&);
-template <class M, class V> T hmax(const const_where_expression<M, V>&);
-
-// algorithms [simd.alg]
-template <class T, class Abi> simd<T, Abi> min(const simd<T, Abi>&, const simd<T, Abi>&) noexcept;
-
-template <class T, class Abi> simd<T, Abi> max(const simd<T, Abi>&, const simd<T, Abi>&) noexcept;
-
-template <class T, class Abi>
-std::pair<simd<T, Abi>, simd<T, Abi>> minmax(const simd<T, Abi>&, const simd<T, Abi>&) noexcept;
-
-template <class T, class Abi>
-simd<T, Abi> clamp(const simd<T, Abi>& v, const simd<T, Abi>& lo, const simd<T, Abi>& hi);
-
-// [simd.whereexpr]
-template <class M, class T>
-class const_where_expression {
-  const M& mask; // exposition only
-  T& data; // exposition only
-public:
-  const_where_expression(const const_where_expression&) = delete;
-  const_where_expression& operator=(const const_where_expression&) = delete;
-  remove_const_t<T> operator-() const &&;
-  template <class U, class Flags> void copy_to(U* mem, Flags f) const &&;
-};
-
-template <class M, class T>
-class where_expression : public const_where_expression<M, T> {
-public:
-  where_expression(const where_expression&) = delete;
-  where_expression& operator=(const where_expression&) = delete;
-  template <class U> void operator=(U&& x);
-  template <class U> void operator+=(U&& x);
-  template <class U> void operator-=(U&& x);
-  template <class U> void operator*=(U&& x);
-  template <class U> void operator/=(U&& x);
-  template <class U> void operator%=(U&& x);
-  template <class U> void operator&=(U&& x);
-  template <class U> void operator|=(U&& x);
-  template <class U> void operator^=(U&& x);
-  template <class U> void operator<<=(U&& x);
-  template <class U> void operator>>=(U&& x);
-  void operator++();
-  void operator++(int);
-  void operator--();
-  void operator--(int);
-  template <class U, class Flags> void copy_from(const U* mem, Flags);
-};
-
-// [simd.class]
-template <class T, class Abi> class simd {
-public:
-  using value_type = T;
-  using reference = see below;
-  using mask_type = simd_mask<T, Abi>;
-
-  using abi_type = Abi;
-  static constexpr size_t size() noexcept;
-  simd() = default;
-
-  // implicit type conversion constructor
-  template <class U> simd(const simd<U, simd_abi::fixed_size<size()>>&);
-
-  // implicit broadcast constructor (see below for constraints)
-  template <class U> simd(U&& value);
-
-  // generator constructor (see below for constraints)
-  template <class G> explicit simd(G&& gen);
-
-  // load constructor
-  template <class U, class Flags> simd(const U* mem, Flags f);
-
-  // loads [simd.load]
-  template <class U, class Flags> void copy_from(const U* mem, Flags f);
-
-  // stores [simd.store]
-  template <class U, class Flags> void copy_to(U* mem, Flags f) const;
-
-  // scalar access [simd.subscr]
-  reference operator[](size_t);
-  value_type operator[](size_t) const;
-
-  // unary operators [simd.unary]
-  simd& operator++();
-  simd operator++(int);
-  simd& operator--();
-  simd operator--(int);
-  mask_type operator!() const;
-  simd operator~() const; // see below
-  simd operator+() const;
-  simd operator-() const;
-
-  // binary operators [simd.binary]
-  friend simd operator+ (const simd&, const simd&);
-  friend simd operator- (const simd&, const simd&);
-  friend simd operator* (const simd&, const simd&);
-  friend simd operator/ (const simd&, const simd&);
-  friend simd operator% (const simd&, const simd&);
-  friend simd operator& (const simd&, const simd&);
-  friend simd operator| (const simd&, const simd&);
-  friend simd operator^ (const simd&, const simd&);
-  friend simd operator<<(const simd&, const simd&);
-  friend simd operator>>(const simd&, const simd&);
-  friend simd operator<<(const simd&, int);
-  friend simd operator>>(const simd&, int);
-
-  // compound assignment [simd.cassign]
-  friend simd& operator+= (simd&, const simd&);
-  friend simd& operator-= (simd&, const simd&);
-  friend simd& operator*= (simd&, const simd&);
-  friend simd& operator/= (simd&, const simd&);
-  friend simd& operator%= (simd&, const simd&);
-
-  friend simd& operator&= (simd&, const simd&);
-  friend simd& operator|= (simd&, const simd&);
-  friend simd& operator^= (simd&, const simd&);
-  friend simd& operator<<=(simd&, const simd&);
-  friend simd& operator>>=(simd&, const simd&);
-  friend simd& operator<<=(simd&, int);
-  friend simd& operator>>=(simd&, int);
-
-  // compares [simd.comparison]
-  friend mask_type operator==(const simd&, const simd&);
-  friend mask_type operator!=(const simd&, const simd&);
-  friend mask_type operator>=(const simd&, const simd&);
-  friend mask_type operator<=(const simd&, const simd&);
-  friend mask_type operator> (const simd&, const simd&);
-  friend mask_type operator< (const simd&, const simd&);
-};
-
-// [simd.math]
-template <class Abi> using scharv = simd<signed char, Abi>; // exposition only
-template <class Abi> using shortv = simd<short, Abi>; // exposition only
-template <class Abi> using intv = simd<int, Abi>; // exposition only
-template <class Abi> using longv = simd<long int, Abi>; // exposition only
-template <class Abi> using llongv = simd<long long int, Abi>; // exposition only
-template <class Abi> using floatv = simd<float, Abi>; // exposition only
-template <class Abi> using doublev = simd<double, Abi>; // exposition only
-template <class Abi> using ldoublev = simd<long double, Abi>; // exposition only
-template <class T, class V> using samesize = fixed_size_simd<T, V::size()>; // exposition only
-
-template <class Abi> floatv<Abi> acos(floatv<Abi> x);
-template <class Abi> doublev<Abi> acos(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> acos(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> asin(floatv<Abi> x);
-template <class Abi> doublev<Abi> asin(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> asin(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> atan(floatv<Abi> x);
-template <class Abi> doublev<Abi> atan(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> atan(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> atan2(floatv<Abi> y, floatv<Abi> x);
-template <class Abi> doublev<Abi> atan2(doublev<Abi> y, doublev<Abi> x);
-template <class Abi> ldoublev<Abi> atan2(ldoublev<Abi> y, ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> cos(floatv<Abi> x);
-template <class Abi> doublev<Abi> cos(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> cos(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> sin(floatv<Abi> x);
-template <class Abi> doublev<Abi> sin(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> sin(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> tan(floatv<Abi> x);
-template <class Abi> doublev<Abi> tan(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> tan(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> acosh(floatv<Abi> x);
-template <class Abi> doublev<Abi> acosh(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> acosh(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> asinh(floatv<Abi> x);
-template <class Abi> doublev<Abi> asinh(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> asinh(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> atanh(floatv<Abi> x);
-template <class Abi> doublev<Abi> atanh(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> atanh(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> cosh(floatv<Abi> x);
-template <class Abi> doublev<Abi> cosh(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> cosh(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> sinh(floatv<Abi> x);
-template <class Abi> doublev<Abi> sinh(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> sinh(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> tanh(floatv<Abi> x);
-template <class Abi> doublev<Abi> tanh(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> tanh(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> exp(floatv<Abi> x);
-template <class Abi> doublev<Abi> exp(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> exp(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> exp2(floatv<Abi> x);
-template <class Abi> doublev<Abi> exp2(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> exp2(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> expm1(floatv<Abi> x);
-template <class Abi> doublev<Abi> expm1(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> expm1(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> frexp(floatv<Abi> value, samesize<int, floatv<Abi>>* exp);
-template <class Abi> doublev<Abi> frexp(doublev<Abi> value, samesize<int, doublev<Abi>>* exp);
-template <class Abi> ldoublev<Abi> frexp(ldoublev<Abi> value, samesize<int, ldoublev<Abi>>* exp);
-
-template <class Abi> samesize<int, floatv<Abi>> ilogb(floatv<Abi> x);
-template <class Abi> samesize<int, doublev<Abi>> ilogb(doublev<Abi> x);
-template <class Abi> samesize<int, ldoublev<Abi>> ilogb(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> ldexp(floatv<Abi> x, samesize<int, floatv<Abi>> exp);
-template <class Abi> doublev<Abi> ldexp(doublev<Abi> x, samesize<int, doublev<Abi>> exp);
-template <class Abi> ldoublev<Abi> ldexp(ldoublev<Abi> x, samesize<int, ldoublev<Abi>> exp);
-
-template <class Abi> floatv<Abi> log(floatv<Abi> x);
-template <class Abi> doublev<Abi> log(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> log(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> log10(floatv<Abi> x);
-template <class Abi> doublev<Abi> log10(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> log10(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> log1p(floatv<Abi> x);
-template <class Abi> doublev<Abi> log1p(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> log1p(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> log2(floatv<Abi> x);
-template <class Abi> doublev<Abi> log2(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> log2(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> logb(floatv<Abi> x);
-template <class Abi> doublev<Abi> logb(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> logb(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> modf(floatv<Abi> value, floatv<Abi>* iptr);
-template <class Abi> doublev<Abi> modf(doublev<Abi> value, doublev<Abi>* iptr);
-template <class Abi> ldoublev<Abi> modf(ldoublev<Abi> value, ldoublev<Abi>* iptr);
-
-template <class Abi> floatv<Abi> scalbn(floatv<Abi> x, samesize<int, floatv<Abi>> n);
-template <class Abi> doublev<Abi> scalbn(doublev<Abi> x, samesize<int, doublev<Abi>> n);
-template <class Abi> ldoublev<Abi> scalbn(ldoublev<Abi> x, samesize<int, ldoublev<Abi>> n);
-template <class Abi> floatv<Abi> scalbln(floatv<Abi> x, samesize<long int, floatv<Abi>> n);
-template <class Abi> doublev<Abi> scalbln(doublev<Abi> x, samesize<long int, doublev<Abi>> n);
-template <class Abi> ldoublev<Abi> scalbln(ldoublev<Abi> x, samesize<long int, ldoublev<Abi>> n);
-
-template <class Abi> floatv<Abi> cbrt(floatv<Abi> x);
-template <class Abi> doublev<Abi> cbrt(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> cbrt(ldoublev<Abi> x);
-
-template <class Abi> scharv<Abi> abs(scharv<Abi> j);
-template <class Abi> shortv<Abi> abs(shortv<Abi> j);
-template <class Abi> intv<Abi> abs(intv<Abi> j);
-template <class Abi> longv<Abi> abs(longv<Abi> j);
-template <class Abi> llongv<Abi> abs(llongv<Abi> j);
-template <class Abi> floatv<Abi> abs(floatv<Abi> j);
-template <class Abi> doublev<Abi> abs(doublev<Abi> j);
-template <class Abi> ldoublev<Abi> abs(ldoublev<Abi> j);
-
-template <class Abi> floatv<Abi> hypot(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> doublev<Abi> hypot(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> ldoublev<Abi> hypot(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> floatv<Abi> hypot(floatv<Abi> x, floatv<Abi> y, floatv<Abi> z);
-template <class Abi> doublev<Abi> hypot(doublev<Abi> x, doublev<Abi> y, doublev<Abi> z);
-template <class Abi> ldoublev<Abi> hypot(ldoublev<Abi> x, ldoublev<Abi> y, ldoublev<Abi> z);
-
-template <class Abi> floatv<Abi> pow(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> doublev<Abi> pow(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> ldoublev<Abi> pow(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> floatv<Abi> sqrt(floatv<Abi> x);
-template <class Abi> doublev<Abi> sqrt(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> sqrt(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> erf(floatv<Abi> x);
-template <class Abi> doublev<Abi> erf(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> erf(ldoublev<Abi> x);
-template <class Abi> floatv<Abi> erfc(floatv<Abi> x);
-template <class Abi> doublev<Abi> erfc(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> erfc(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> lgamma(floatv<Abi> x);
-template <class Abi> doublev<Abi> lgamma(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> lgamma(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> tgamma(floatv<Abi> x);
-template <class Abi> doublev<Abi> tgamma(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> tgamma(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> ceil(floatv<Abi> x);
-template <class Abi> doublev<Abi> ceil(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> ceil(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> floor(floatv<Abi> x);
-template <class Abi> doublev<Abi> floor(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> floor(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> nearbyint(floatv<Abi> x);
-template <class Abi> doublev<Abi> nearbyint(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> nearbyint(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> rint(floatv<Abi> x);
-template <class Abi> doublev<Abi> rint(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> rint(ldoublev<Abi> x);
-
-template <class Abi> samesize<long int, floatv<Abi>> lrint(floatv<Abi> x);
-template <class Abi> samesize<long int, doublev<Abi>> lrint(doublev<Abi> x);
-template <class Abi> samesize<long int, ldoublev<Abi>> lrint(ldoublev<Abi> x);
-template <class Abi> samesize<long long int, floatv<Abi>> llrint(floatv<Abi> x);
-template <class Abi> samesize<long long int, doublev<Abi>> llrint(doublev<Abi> x);
-template <class Abi> samesize<long long int, ldoublev<Abi>> llrint(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> round(floatv<Abi> x);
-template <class Abi> doublev<Abi> round(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> round(ldoublev<Abi> x);
-template <class Abi> samesize<long int, floatv<Abi>> lround(floatv<Abi> x);
-template <class Abi> samesize<long int, doublev<Abi>> lround(doublev<Abi> x);
-template <class Abi> samesize<long int, ldoublev<Abi>> lround(ldoublev<Abi> x);
-template <class Abi> samesize<long long int, floatv<Abi>> llround(floatv<Abi> x);
-template <class Abi> samesize<long long int, doublev<Abi>> llround(doublev<Abi> x);
-template <class Abi> samesize<long long int, ldoublev<Abi>> llround(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> trunc(floatv<Abi> x);
-template <class Abi> doublev<Abi> trunc(doublev<Abi> x);
-template <class Abi> ldoublev<Abi> trunc(ldoublev<Abi> x);
-
-template <class Abi> floatv<Abi> fmod(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> doublev<Abi> fmod(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> ldoublev<Abi> fmod(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> floatv<Abi> remainder(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> doublev<Abi> remainder(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> ldoublev<Abi> remainder(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> floatv<Abi> remquo(floatv<Abi> x, floatv<Abi> y, samesize<int, floatv<Abi>>* quo);
-template <class Abi> doublev<Abi> remquo(doublev<Abi> x, doublev<Abi> y, samesize<int, doublev<Abi>>* quo);
-template <class Abi> ldoublev<Abi> remquo(ldoublev<Abi> x, ldoublev<Abi> y, samesize<int, ldoublev<Abi>>* quo);
-
-template <class Abi> floatv<Abi> copysign(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> doublev<Abi> copysign(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> ldoublev<Abi> copysign(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> doublev<Abi> nan(const char* tagp);
-template <class Abi> floatv<Abi> nanf(const char* tagp);
-template <class Abi> ldoublev<Abi> nanl(const char* tagp);
-
-template <class Abi> floatv<Abi> nextafter(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> doublev<Abi> nextafter(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> ldoublev<Abi> nextafter(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> floatv<Abi> nexttoward(floatv<Abi> x, ldoublev<Abi> y);
-template <class Abi> doublev<Abi> nexttoward(doublev<Abi> x, ldoublev<Abi> y);
-template <class Abi> ldoublev<Abi> nexttoward(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> floatv<Abi> fdim(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> doublev<Abi> fdim(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> ldoublev<Abi> fdim(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> floatv<Abi> fmax(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> doublev<Abi> fmax(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> ldoublev<Abi> fmax(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> floatv<Abi> fmin(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> doublev<Abi> fmin(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> ldoublev<Abi> fmin(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> floatv<Abi> fma(floatv<Abi> x, floatv<Abi> y, floatv<Abi> z);
-template <class Abi> doublev<Abi> fma(doublev<Abi> x, doublev<Abi> y, doublev<Abi> z);
-template <class Abi> ldoublev<Abi> fma(ldoublev<Abi> x, ldoublev<Abi> y, ldoublev<Abi> z);
-
-template <class Abi> samesize<int, floatv<Abi>> fpclassify(floatv<Abi> x);
-template <class Abi> samesize<int, doublev<Abi>> fpclassify(doublev<Abi> x);
-template <class Abi> samesize<int, ldoublev<Abi>> fpclassify(ldoublev<Abi> x);
-
-template <class Abi> simd_mask<float, Abi> isfinite(floatv<Abi> x);
-template <class Abi> simd_mask<double, Abi> isfinite(doublev<Abi> x);
-template <class Abi> simd_mask<long double, Abi> isfinite(ldoublev<Abi> x);
-
-template <class Abi> simd_mask<float, Abi> isinf(floatv<Abi> x);
-template <class Abi> simd_mask<double, Abi> isinf(doublev<Abi> x);
-template <class Abi> simd_mask<long double, Abi> isinf(ldoublev<Abi> x);
-
-template <class Abi> simd_mask<float, Abi> isnan(floatv<Abi> x);
-template <class Abi> simd_mask<double, Abi> isnan(doublev<Abi> x);
-template <class Abi> simd_mask<long double, Abi> isnan(ldoublev<Abi> x);
-
-template <class Abi> simd_mask<float, Abi> isnormal(floatv<Abi> x);
-template <class Abi> simd_mask<double, Abi> isnormal(doublev<Abi> x);
-template <class Abi> simd_mask<long double, Abi> isnormal(ldoublev<Abi> x);
-
-template <class Abi> simd_mask<float, Abi> signbit(floatv<Abi> x);
-template <class Abi> simd_mask<double, Abi> signbit(doublev<Abi> x);
-template <class Abi> simd_mask<long double, Abi> signbit(ldoublev<Abi> x);
-
-template <class Abi> simd_mask<float, Abi> isgreater(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> simd_mask<double, Abi> isgreater(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> simd_mask<long double, Abi> isgreater(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> simd_mask<float, Abi> isgreaterequal(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> simd_mask<double, Abi> isgreaterequal(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> simd_mask<long double, Abi> isgreaterequal(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> simd_mask<float, Abi> isless(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> simd_mask<double, Abi> isless(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> simd_mask<long double, Abi> isless(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> simd_mask<float, Abi> islessequal(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> simd_mask<double, Abi> islessequal(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> simd_mask<long double, Abi> islessequal(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> simd_mask<float, Abi> islessgreater(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> simd_mask<double, Abi> islessgreater(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> simd_mask<long double, Abi> islessgreater(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class Abi> simd_mask<float, Abi> isunordered(floatv<Abi> x, floatv<Abi> y);
-template <class Abi> simd_mask<double, Abi> isunordered(doublev<Abi> x, doublev<Abi> y);
-template <class Abi> simd_mask<long double, Abi> isunordered(ldoublev<Abi> x, ldoublev<Abi> y);
-
-template <class V> struct simd_div_t { V quot, rem; };
-template <class Abi> simd_div_t<scharv<Abi>> div(scharv<Abi> numer, scharv<Abi> denom);
-template <class Abi> simd_div_t<shortv<Abi>> div(shortv<Abi> numer, shortv<Abi> denom);
-template <class Abi> simd_div_t<intv<Abi>> div(intv<Abi> numer, intv<Abi> denom);
-template <class Abi> simd_div_t<longv<Abi>> div(longv<Abi> numer, longv<Abi> denom);
-template <class Abi> simd_div_t<llongv<Abi>> div(llongv<Abi> numer, llongv<Abi> denom);
-
-// [simd.mask.class]
-template <class T, class Abi>
-class simd_mask {
-public:
-  using value_type = bool;
-  using reference = see below;
-  using simd_type = simd<T, Abi>;
-  using abi_type = Abi;
-  static constexpr size_t size() noexcept;
-  simd_mask() = default;
-
-  // broadcast constructor
-  explicit simd_mask(value_type) noexcept;
-
-  // implicit type conversion constructor
-  template <class U> simd_mask(const simd_mask<U, simd_abi::fixed_size<size()>>&) noexcept;
-
-  // load constructor
-  template <class Flags> simd_mask(const value_type* mem, Flags);
-
-  // loads [simd.mask.copy]
-  template <class Flags> void copy_from(const value_type* mem, Flags);
-  template <class Flags> void copy_to(value_type* mem, Flags) const;
-
-  // scalar access [simd.mask.subscr]
-  reference operator[](size_t);
-  value_type operator[](size_t) const;
-
-  // unary operators [simd.mask.unary]
-  simd_mask operator!() const noexcept;
-
-  // simd_mask binary operators [simd.mask.binary]
-  friend simd_mask operator&&(const simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask operator||(const simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask operator& (const simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask operator| (const simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask operator^ (const simd_mask&, const simd_mask&) noexcept;
-
-  // simd_mask compound assignment [simd.mask.cassign]
-  friend simd_mask& operator&=(simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask& operator|=(simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask& operator^=(simd_mask&, const simd_mask&) noexcept;
-
-  // simd_mask compares [simd.mask.comparison]
-  friend simd_mask operator==(const simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask operator!=(const simd_mask&, const simd_mask&) noexcept;
-};
-
-} // parallelism_v2
-} // std::experimental
-
-*/
-
-#include <experimental/__config>
+// 
+//===----------------------------------------------------------------------===// 
+#ifndef _LIBCPP_EXPERIMENTAL_SIMD 
+#define _LIBCPP_EXPERIMENTAL_SIMD 
+ 
+/* 
+    experimental/simd synopsis 
+ 
+namespace std::experimental { 
+ 
+inline namespace parallelism_v2 { 
+ 
+namespace simd_abi { 
+ 
+struct scalar {}; 
+template <int N> struct fixed_size {}; 
+template <typename T> inline constexpr int max_fixed_size = implementation-defined; 
+template <typename T> using compatible = implementation-defined; 
+template <typename T> using native = implementation-defined; 
+ 
+} // simd_abi 
+ 
+struct element_aligned_tag {}; 
+struct vector_aligned_tag {}; 
+template <size_t> struct overaligned_tag {}; 
+inline constexpr element_aligned_tag element_aligned{}; 
+inline constexpr vector_aligned_tag vector_aligned{}; 
+template <size_t N> inline constexpr overaligned_tag<N> overaligned{}; 
+ 
+// traits [simd.traits] 
+template <class T> struct is_abi_tag; 
+template <class T> inline constexpr bool is_abi_tag_v = is_abi_tag<T>::value; 
+ 
+template <class T> struct is_simd; 
+template <class T> inline constexpr bool is_simd_v = is_simd<T>::value; 
+ 
+template <class T> struct is_simd_mask; 
+template <class T> inline constexpr bool is_simd_mask_v = is_simd_mask<T>::value; 
+ 
+template <class T> struct is_simd_flag_type; 
+template <class T> inline constexpr bool is_simd_flag_type_v = is_simd_flag_type<T>::value; 
+ 
+template <class T, size_t N> struct abi_for_size { using type = see below; }; 
+template <class T, size_t N> using abi_for_size_t = typename abi_for_size<T, N>::type; 
+ 
+template <class T, class Abi = simd_abi::compatible<T>> struct simd_size; 
+template <class T, class Abi = simd_abi::compatible<T>> 
+inline constexpr size_t simd_size_v = simd_size<T, Abi>::value; 
+ 
+template <class T, class U = typename T::value_type> struct memory_alignment; 
+template <class T, class U = typename T::value_type> 
+inline constexpr size_t memory_alignment_v = memory_alignment<T, U>::value; 
+ 
+// class template simd [simd.class] 
+template <class T, class Abi = simd_abi::compatible<T>> class simd; 
+template <class T> using native_simd = simd<T, simd_abi::native<T>>; 
+template <class T, int N> using fixed_size_simd = simd<T, simd_abi::fixed_size<N>>; 
+ 
+// class template simd_mask [simd.mask.class] 
+template <class T, class Abi = simd_abi::compatible<T>> class simd_mask; 
+template <class T> using native_simd_mask = simd_mask<T, simd_abi::native<T>>; 
+template <class T, int N> using fixed_size_simd_mask = simd_mask<T, simd_abi::fixed_size<N>>; 
+ 
+// casts [simd.casts] 
+template <class T, class U, class Abi> see below simd_cast(const simd<U, Abi>&); 
+template <class T, class U, class Abi> see below static_simd_cast(const simd<U, Abi>&); 
+ 
+template <class T, class Abi> 
+fixed_size_simd<T, simd_size_v<T, Abi>> to_fixed_size(const simd<T, Abi>&) noexcept; 
+template <class T, class Abi> 
+fixed_size_simd_mask<T, simd_size_v<T, Abi>> to_fixed_size(const simd_mask<T, Abi>&) noexcept; 
+template <class T, size_t N> native_simd<T> to_native(const fixed_size_simd<T, N>&) noexcept; 
+template <class T, size_t N> 
+native_simd_mask<T> to_native(const fixed_size_simd_mask<T, N>> &) noexcept; 
+template <class T, size_t N> simd<T> to_compatible(const fixed_size_simd<T, N>&) noexcept; 
+template <class T, size_t N> simd_mask<T> to_compatible(const fixed_size_simd_mask<T, N>&) noexcept; 
+ 
+template <size_t... Sizes, class T, class Abi> 
+tuple<simd<T, abi_for_size_t<Sizes>>...> split(const simd<T, Abi>&); 
+template <size_t... Sizes, class T, class Abi> 
+tuple<simd_mask<T, abi_for_size_t<Sizes>>...> split(const simd_mask<T, Abi>&); 
+template <class V, class Abi> 
+array<V, simd_size_v<typename V::value_type, Abi> / V::size()> split( 
+const simd<typename V::value_type, Abi>&); 
+template <class V, class Abi> 
+array<V, simd_size_v<typename V::value_type, Abi> / V::size()> split( 
+const simd_mask<typename V::value_type, Abi>&); 
+ 
+template <class T, class... Abis> 
+simd<T, abi_for_size_t<T, (simd_size_v<T, Abis> + ...)>> concat(const simd<T, Abis>&...); 
+template <class T, class... Abis> 
+simd_mask<T, abi_for_size_t<T, (simd_size_v<T, Abis> + ...)>> concat(const simd_mask<T, Abis>&...); 
+ 
+// reductions [simd.mask.reductions] 
+template <class T, class Abi> bool all_of(const simd_mask<T, Abi>&) noexcept; 
+template <class T, class Abi> bool any_of(const simd_mask<T, Abi>&) noexcept; 
+template <class T, class Abi> bool none_of(const simd_mask<T, Abi>&) noexcept; 
+template <class T, class Abi> bool some_of(const simd_mask<T, Abi>&) noexcept; 
+template <class T, class Abi> int popcount(const simd_mask<T, Abi>&) noexcept; 
+template <class T, class Abi> int find_first_set(const simd_mask<T, Abi>&); 
+template <class T, class Abi> int find_last_set(const simd_mask<T, Abi>&); 
+ 
+bool all_of(see below) noexcept; 
+bool any_of(see below) noexcept; 
+bool none_of(see below) noexcept; 
+bool some_of(see below) noexcept; 
+int popcount(see below) noexcept; 
+int find_first_set(see below) noexcept; 
+int find_last_set(see below) noexcept; 
+ 
+// masked assignment [simd.whereexpr] 
+template <class M, class T> class const_where_expression; 
+template <class M, class T> class where_expression; 
+ 
+// masked assignment [simd.mask.where] 
+template <class T> struct nodeduce { using type = T; }; // exposition only 
+ 
+template <class T> using nodeduce_t = typename nodeduce<T>::type; // exposition only 
+ 
+template <class T, class Abi> 
+where_expression<simd_mask<T, Abi>, simd<T, Abi>> 
+where(const typename simd<T, Abi>::mask_type&, simd<T, Abi>&) noexcept; 
+ 
+template <class T, class Abi> 
+const_where_expression<simd_mask<T, Abi>, const simd<T, Abi>> 
+where(const typename simd<T, Abi>::mask_type&, const simd<T, Abi>&) noexcept; 
+ 
+template <class T, class Abi> 
+where_expression<simd_mask<T, Abi>, simd_mask<T, Abi>> 
+where(const nodeduce_t<simd_mask<T, Abi>>&, simd_mask<T, Abi>&) noexcept; 
+ 
+template <class T, class Abi> 
+const_where_expression<simd_mask<T, Abi>, const simd_mask<T, Abi>> 
+where(const nodeduce_t<simd_mask<T, Abi>>&, const simd_mask<T, Abi>&) noexcept; 
+ 
+template <class T> where_expression<bool, T> where(see below k, T& d) noexcept; 
+ 
+template <class T> 
+const_where_expression<bool, const T> where(see below k, const T& d) noexcept; 
+ 
+// reductions [simd.reductions] 
+template <class T, class Abi, class BinaryOperation = std::plus<>> 
+T reduce(const simd<T, Abi>&, BinaryOperation = BinaryOperation()); 
+ 
+template <class M, class V, class BinaryOperation> 
+typename V::value_type reduce(const const_where_expression<M, V>& x, 
+typename V::value_type neutral_element, BinaryOperation binary_op); 
+ 
+template <class M, class V> 
+typename V::value_type reduce(const const_where_expression<M, V>& x, plus<> binary_op = plus<>()); 
+ 
+template <class M, class V> 
+typename V::value_type reduce(const const_where_expression<M, V>& x, multiplies<> binary_op); 
+ 
+template <class M, class V> 
+typename V::value_type reduce(const const_where_expression<M, V>& x, bit_and<> binary_op); 
+ 
+template <class M, class V> 
+typename V::value_type reduce(const const_where_expression<M, V>& x, bit_or<> binary_op); 
+ 
+template <class M, class V> 
+typename V::value_type reduce(const const_where_expression<M, V>& x, bit_xor<> binary_op); 
+ 
+template <class T, class Abi> T hmin(const simd<T, Abi>&); 
+template <class M, class V> T hmin(const const_where_expression<M, V>&); 
+template <class T, class Abi> T hmax(const simd<T, Abi>&); 
+template <class M, class V> T hmax(const const_where_expression<M, V>&); 
+ 
+// algorithms [simd.alg] 
+template <class T, class Abi> simd<T, Abi> min(const simd<T, Abi>&, const simd<T, Abi>&) noexcept; 
+ 
+template <class T, class Abi> simd<T, Abi> max(const simd<T, Abi>&, const simd<T, Abi>&) noexcept; 
+ 
+template <class T, class Abi> 
+std::pair<simd<T, Abi>, simd<T, Abi>> minmax(const simd<T, Abi>&, const simd<T, Abi>&) noexcept; 
+ 
+template <class T, class Abi> 
+simd<T, Abi> clamp(const simd<T, Abi>& v, const simd<T, Abi>& lo, const simd<T, Abi>& hi); 
+ 
+// [simd.whereexpr] 
+template <class M, class T> 
+class const_where_expression { 
+  const M& mask; // exposition only 
+  T& data; // exposition only 
+public: 
+  const_where_expression(const const_where_expression&) = delete; 
+  const_where_expression& operator=(const const_where_expression&) = delete; 
+  remove_const_t<T> operator-() const &&; 
+  template <class U, class Flags> void copy_to(U* mem, Flags f) const &&; 
+}; 
+ 
+template <class M, class T> 
+class where_expression : public const_where_expression<M, T> { 
+public: 
+  where_expression(const where_expression&) = delete; 
+  where_expression& operator=(const where_expression&) = delete; 
+  template <class U> void operator=(U&& x); 
+  template <class U> void operator+=(U&& x); 
+  template <class U> void operator-=(U&& x); 
+  template <class U> void operator*=(U&& x); 
+  template <class U> void operator/=(U&& x); 
+  template <class U> void operator%=(U&& x); 
+  template <class U> void operator&=(U&& x); 
+  template <class U> void operator|=(U&& x); 
+  template <class U> void operator^=(U&& x); 
+  template <class U> void operator<<=(U&& x); 
+  template <class U> void operator>>=(U&& x); 
+  void operator++(); 
+  void operator++(int); 
+  void operator--(); 
+  void operator--(int); 
+  template <class U, class Flags> void copy_from(const U* mem, Flags); 
+}; 
+ 
+// [simd.class] 
+template <class T, class Abi> class simd { 
+public: 
+  using value_type = T; 
+  using reference = see below; 
+  using mask_type = simd_mask<T, Abi>; 
+ 
+  using abi_type = Abi; 
+  static constexpr size_t size() noexcept; 
+  simd() = default; 
+ 
+  // implicit type conversion constructor 
+  template <class U> simd(const simd<U, simd_abi::fixed_size<size()>>&); 
+ 
+  // implicit broadcast constructor (see below for constraints) 
+  template <class U> simd(U&& value); 
+ 
+  // generator constructor (see below for constraints) 
+  template <class G> explicit simd(G&& gen); 
+ 
+  // load constructor 
+  template <class U, class Flags> simd(const U* mem, Flags f); 
+ 
+  // loads [simd.load] 
+  template <class U, class Flags> void copy_from(const U* mem, Flags f); 
+ 
+  // stores [simd.store] 
+  template <class U, class Flags> void copy_to(U* mem, Flags f) const; 
+ 
+  // scalar access [simd.subscr] 
+  reference operator[](size_t); 
+  value_type operator[](size_t) const; 
+ 
+  // unary operators [simd.unary] 
+  simd& operator++(); 
+  simd operator++(int); 
+  simd& operator--(); 
+  simd operator--(int); 
+  mask_type operator!() const; 
+  simd operator~() const; // see below 
+  simd operator+() const; 
+  simd operator-() const; 
+ 
+  // binary operators [simd.binary] 
+  friend simd operator+ (const simd&, const simd&); 
+  friend simd operator- (const simd&, const simd&); 
+  friend simd operator* (const simd&, const simd&); 
+  friend simd operator/ (const simd&, const simd&); 
+  friend simd operator% (const simd&, const simd&); 
+  friend simd operator& (const simd&, const simd&); 
+  friend simd operator| (const simd&, const simd&); 
+  friend simd operator^ (const simd&, const simd&); 
+  friend simd operator<<(const simd&, const simd&); 
+  friend simd operator>>(const simd&, const simd&); 
+  friend simd operator<<(const simd&, int); 
+  friend simd operator>>(const simd&, int); 
+ 
+  // compound assignment [simd.cassign] 
+  friend simd& operator+= (simd&, const simd&); 
+  friend simd& operator-= (simd&, const simd&); 
+  friend simd& operator*= (simd&, const simd&); 
+  friend simd& operator/= (simd&, const simd&); 
+  friend simd& operator%= (simd&, const simd&); 
+ 
+  friend simd& operator&= (simd&, const simd&); 
+  friend simd& operator|= (simd&, const simd&); 
+  friend simd& operator^= (simd&, const simd&); 
+  friend simd& operator<<=(simd&, const simd&); 
+  friend simd& operator>>=(simd&, const simd&); 
+  friend simd& operator<<=(simd&, int); 
+  friend simd& operator>>=(simd&, int); 
+ 
+  // compares [simd.comparison] 
+  friend mask_type operator==(const simd&, const simd&); 
+  friend mask_type operator!=(const simd&, const simd&); 
+  friend mask_type operator>=(const simd&, const simd&); 
+  friend mask_type operator<=(const simd&, const simd&); 
+  friend mask_type operator> (const simd&, const simd&); 
+  friend mask_type operator< (const simd&, const simd&); 
+}; 
+ 
+// [simd.math] 
+template <class Abi> using scharv = simd<signed char, Abi>; // exposition only 
+template <class Abi> using shortv = simd<short, Abi>; // exposition only 
+template <class Abi> using intv = simd<int, Abi>; // exposition only 
+template <class Abi> using longv = simd<long int, Abi>; // exposition only 
+template <class Abi> using llongv = simd<long long int, Abi>; // exposition only 
+template <class Abi> using floatv = simd<float, Abi>; // exposition only 
+template <class Abi> using doublev = simd<double, Abi>; // exposition only 
+template <class Abi> using ldoublev = simd<long double, Abi>; // exposition only 
+template <class T, class V> using samesize = fixed_size_simd<T, V::size()>; // exposition only 
+ 
+template <class Abi> floatv<Abi> acos(floatv<Abi> x); 
+template <class Abi> doublev<Abi> acos(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> acos(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> asin(floatv<Abi> x); 
+template <class Abi> doublev<Abi> asin(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> asin(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> atan(floatv<Abi> x); 
+template <class Abi> doublev<Abi> atan(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> atan(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> atan2(floatv<Abi> y, floatv<Abi> x); 
+template <class Abi> doublev<Abi> atan2(doublev<Abi> y, doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> atan2(ldoublev<Abi> y, ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> cos(floatv<Abi> x); 
+template <class Abi> doublev<Abi> cos(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> cos(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> sin(floatv<Abi> x); 
+template <class Abi> doublev<Abi> sin(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> sin(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> tan(floatv<Abi> x); 
+template <class Abi> doublev<Abi> tan(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> tan(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> acosh(floatv<Abi> x); 
+template <class Abi> doublev<Abi> acosh(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> acosh(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> asinh(floatv<Abi> x); 
+template <class Abi> doublev<Abi> asinh(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> asinh(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> atanh(floatv<Abi> x); 
+template <class Abi> doublev<Abi> atanh(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> atanh(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> cosh(floatv<Abi> x); 
+template <class Abi> doublev<Abi> cosh(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> cosh(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> sinh(floatv<Abi> x); 
+template <class Abi> doublev<Abi> sinh(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> sinh(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> tanh(floatv<Abi> x); 
+template <class Abi> doublev<Abi> tanh(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> tanh(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> exp(floatv<Abi> x); 
+template <class Abi> doublev<Abi> exp(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> exp(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> exp2(floatv<Abi> x); 
+template <class Abi> doublev<Abi> exp2(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> exp2(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> expm1(floatv<Abi> x); 
+template <class Abi> doublev<Abi> expm1(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> expm1(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> frexp(floatv<Abi> value, samesize<int, floatv<Abi>>* exp); 
+template <class Abi> doublev<Abi> frexp(doublev<Abi> value, samesize<int, doublev<Abi>>* exp); 
+template <class Abi> ldoublev<Abi> frexp(ldoublev<Abi> value, samesize<int, ldoublev<Abi>>* exp); 
+ 
+template <class Abi> samesize<int, floatv<Abi>> ilogb(floatv<Abi> x); 
+template <class Abi> samesize<int, doublev<Abi>> ilogb(doublev<Abi> x); 
+template <class Abi> samesize<int, ldoublev<Abi>> ilogb(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> ldexp(floatv<Abi> x, samesize<int, floatv<Abi>> exp); 
+template <class Abi> doublev<Abi> ldexp(doublev<Abi> x, samesize<int, doublev<Abi>> exp); 
+template <class Abi> ldoublev<Abi> ldexp(ldoublev<Abi> x, samesize<int, ldoublev<Abi>> exp); 
+ 
+template <class Abi> floatv<Abi> log(floatv<Abi> x); 
+template <class Abi> doublev<Abi> log(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> log(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> log10(floatv<Abi> x); 
+template <class Abi> doublev<Abi> log10(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> log10(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> log1p(floatv<Abi> x); 
+template <class Abi> doublev<Abi> log1p(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> log1p(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> log2(floatv<Abi> x); 
+template <class Abi> doublev<Abi> log2(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> log2(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> logb(floatv<Abi> x); 
+template <class Abi> doublev<Abi> logb(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> logb(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> modf(floatv<Abi> value, floatv<Abi>* iptr); 
+template <class Abi> doublev<Abi> modf(doublev<Abi> value, doublev<Abi>* iptr); 
+template <class Abi> ldoublev<Abi> modf(ldoublev<Abi> value, ldoublev<Abi>* iptr); 
+ 
+template <class Abi> floatv<Abi> scalbn(floatv<Abi> x, samesize<int, floatv<Abi>> n); 
+template <class Abi> doublev<Abi> scalbn(doublev<Abi> x, samesize<int, doublev<Abi>> n); 
+template <class Abi> ldoublev<Abi> scalbn(ldoublev<Abi> x, samesize<int, ldoublev<Abi>> n); 
+template <class Abi> floatv<Abi> scalbln(floatv<Abi> x, samesize<long int, floatv<Abi>> n); 
+template <class Abi> doublev<Abi> scalbln(doublev<Abi> x, samesize<long int, doublev<Abi>> n); 
+template <class Abi> ldoublev<Abi> scalbln(ldoublev<Abi> x, samesize<long int, ldoublev<Abi>> n); 
+ 
+template <class Abi> floatv<Abi> cbrt(floatv<Abi> x); 
+template <class Abi> doublev<Abi> cbrt(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> cbrt(ldoublev<Abi> x); 
+ 
+template <class Abi> scharv<Abi> abs(scharv<Abi> j); 
+template <class Abi> shortv<Abi> abs(shortv<Abi> j); 
+template <class Abi> intv<Abi> abs(intv<Abi> j); 
+template <class Abi> longv<Abi> abs(longv<Abi> j); 
+template <class Abi> llongv<Abi> abs(llongv<Abi> j); 
+template <class Abi> floatv<Abi> abs(floatv<Abi> j); 
+template <class Abi> doublev<Abi> abs(doublev<Abi> j); 
+template <class Abi> ldoublev<Abi> abs(ldoublev<Abi> j); 
+ 
+template <class Abi> floatv<Abi> hypot(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> doublev<Abi> hypot(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> ldoublev<Abi> hypot(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> floatv<Abi> hypot(floatv<Abi> x, floatv<Abi> y, floatv<Abi> z); 
+template <class Abi> doublev<Abi> hypot(doublev<Abi> x, doublev<Abi> y, doublev<Abi> z); 
+template <class Abi> ldoublev<Abi> hypot(ldoublev<Abi> x, ldoublev<Abi> y, ldoublev<Abi> z); 
+ 
+template <class Abi> floatv<Abi> pow(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> doublev<Abi> pow(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> ldoublev<Abi> pow(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> floatv<Abi> sqrt(floatv<Abi> x); 
+template <class Abi> doublev<Abi> sqrt(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> sqrt(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> erf(floatv<Abi> x); 
+template <class Abi> doublev<Abi> erf(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> erf(ldoublev<Abi> x); 
+template <class Abi> floatv<Abi> erfc(floatv<Abi> x); 
+template <class Abi> doublev<Abi> erfc(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> erfc(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> lgamma(floatv<Abi> x); 
+template <class Abi> doublev<Abi> lgamma(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> lgamma(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> tgamma(floatv<Abi> x); 
+template <class Abi> doublev<Abi> tgamma(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> tgamma(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> ceil(floatv<Abi> x); 
+template <class Abi> doublev<Abi> ceil(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> ceil(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> floor(floatv<Abi> x); 
+template <class Abi> doublev<Abi> floor(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> floor(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> nearbyint(floatv<Abi> x); 
+template <class Abi> doublev<Abi> nearbyint(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> nearbyint(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> rint(floatv<Abi> x); 
+template <class Abi> doublev<Abi> rint(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> rint(ldoublev<Abi> x); 
+ 
+template <class Abi> samesize<long int, floatv<Abi>> lrint(floatv<Abi> x); 
+template <class Abi> samesize<long int, doublev<Abi>> lrint(doublev<Abi> x); 
+template <class Abi> samesize<long int, ldoublev<Abi>> lrint(ldoublev<Abi> x); 
+template <class Abi> samesize<long long int, floatv<Abi>> llrint(floatv<Abi> x); 
+template <class Abi> samesize<long long int, doublev<Abi>> llrint(doublev<Abi> x); 
+template <class Abi> samesize<long long int, ldoublev<Abi>> llrint(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> round(floatv<Abi> x); 
+template <class Abi> doublev<Abi> round(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> round(ldoublev<Abi> x); 
+template <class Abi> samesize<long int, floatv<Abi>> lround(floatv<Abi> x); 
+template <class Abi> samesize<long int, doublev<Abi>> lround(doublev<Abi> x); 
+template <class Abi> samesize<long int, ldoublev<Abi>> lround(ldoublev<Abi> x); 
+template <class Abi> samesize<long long int, floatv<Abi>> llround(floatv<Abi> x); 
+template <class Abi> samesize<long long int, doublev<Abi>> llround(doublev<Abi> x); 
+template <class Abi> samesize<long long int, ldoublev<Abi>> llround(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> trunc(floatv<Abi> x); 
+template <class Abi> doublev<Abi> trunc(doublev<Abi> x); 
+template <class Abi> ldoublev<Abi> trunc(ldoublev<Abi> x); 
+ 
+template <class Abi> floatv<Abi> fmod(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> doublev<Abi> fmod(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> ldoublev<Abi> fmod(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> floatv<Abi> remainder(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> doublev<Abi> remainder(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> ldoublev<Abi> remainder(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> floatv<Abi> remquo(floatv<Abi> x, floatv<Abi> y, samesize<int, floatv<Abi>>* quo); 
+template <class Abi> doublev<Abi> remquo(doublev<Abi> x, doublev<Abi> y, samesize<int, doublev<Abi>>* quo); 
+template <class Abi> ldoublev<Abi> remquo(ldoublev<Abi> x, ldoublev<Abi> y, samesize<int, ldoublev<Abi>>* quo); 
+ 
+template <class Abi> floatv<Abi> copysign(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> doublev<Abi> copysign(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> ldoublev<Abi> copysign(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> doublev<Abi> nan(const char* tagp); 
+template <class Abi> floatv<Abi> nanf(const char* tagp); 
+template <class Abi> ldoublev<Abi> nanl(const char* tagp); 
+ 
+template <class Abi> floatv<Abi> nextafter(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> doublev<Abi> nextafter(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> ldoublev<Abi> nextafter(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> floatv<Abi> nexttoward(floatv<Abi> x, ldoublev<Abi> y); 
+template <class Abi> doublev<Abi> nexttoward(doublev<Abi> x, ldoublev<Abi> y); 
+template <class Abi> ldoublev<Abi> nexttoward(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> floatv<Abi> fdim(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> doublev<Abi> fdim(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> ldoublev<Abi> fdim(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> floatv<Abi> fmax(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> doublev<Abi> fmax(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> ldoublev<Abi> fmax(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> floatv<Abi> fmin(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> doublev<Abi> fmin(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> ldoublev<Abi> fmin(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> floatv<Abi> fma(floatv<Abi> x, floatv<Abi> y, floatv<Abi> z); 
+template <class Abi> doublev<Abi> fma(doublev<Abi> x, doublev<Abi> y, doublev<Abi> z); 
+template <class Abi> ldoublev<Abi> fma(ldoublev<Abi> x, ldoublev<Abi> y, ldoublev<Abi> z); 
+ 
+template <class Abi> samesize<int, floatv<Abi>> fpclassify(floatv<Abi> x); 
+template <class Abi> samesize<int, doublev<Abi>> fpclassify(doublev<Abi> x); 
+template <class Abi> samesize<int, ldoublev<Abi>> fpclassify(ldoublev<Abi> x); 
+ 
+template <class Abi> simd_mask<float, Abi> isfinite(floatv<Abi> x); 
+template <class Abi> simd_mask<double, Abi> isfinite(doublev<Abi> x); 
+template <class Abi> simd_mask<long double, Abi> isfinite(ldoublev<Abi> x); 
+ 
+template <class Abi> simd_mask<float, Abi> isinf(floatv<Abi> x); 
+template <class Abi> simd_mask<double, Abi> isinf(doublev<Abi> x); 
+template <class Abi> simd_mask<long double, Abi> isinf(ldoublev<Abi> x); 
+ 
+template <class Abi> simd_mask<float, Abi> isnan(floatv<Abi> x); 
+template <class Abi> simd_mask<double, Abi> isnan(doublev<Abi> x); 
+template <class Abi> simd_mask<long double, Abi> isnan(ldoublev<Abi> x); 
+ 
+template <class Abi> simd_mask<float, Abi> isnormal(floatv<Abi> x); 
+template <class Abi> simd_mask<double, Abi> isnormal(doublev<Abi> x); 
+template <class Abi> simd_mask<long double, Abi> isnormal(ldoublev<Abi> x); 
+ 
+template <class Abi> simd_mask<float, Abi> signbit(floatv<Abi> x); 
+template <class Abi> simd_mask<double, Abi> signbit(doublev<Abi> x); 
+template <class Abi> simd_mask<long double, Abi> signbit(ldoublev<Abi> x); 
+ 
+template <class Abi> simd_mask<float, Abi> isgreater(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> simd_mask<double, Abi> isgreater(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> simd_mask<long double, Abi> isgreater(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> simd_mask<float, Abi> isgreaterequal(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> simd_mask<double, Abi> isgreaterequal(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> simd_mask<long double, Abi> isgreaterequal(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> simd_mask<float, Abi> isless(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> simd_mask<double, Abi> isless(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> simd_mask<long double, Abi> isless(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> simd_mask<float, Abi> islessequal(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> simd_mask<double, Abi> islessequal(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> simd_mask<long double, Abi> islessequal(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> simd_mask<float, Abi> islessgreater(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> simd_mask<double, Abi> islessgreater(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> simd_mask<long double, Abi> islessgreater(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class Abi> simd_mask<float, Abi> isunordered(floatv<Abi> x, floatv<Abi> y); 
+template <class Abi> simd_mask<double, Abi> isunordered(doublev<Abi> x, doublev<Abi> y); 
+template <class Abi> simd_mask<long double, Abi> isunordered(ldoublev<Abi> x, ldoublev<Abi> y); 
+ 
+template <class V> struct simd_div_t { V quot, rem; }; 
+template <class Abi> simd_div_t<scharv<Abi>> div(scharv<Abi> numer, scharv<Abi> denom); 
+template <class Abi> simd_div_t<shortv<Abi>> div(shortv<Abi> numer, shortv<Abi> denom); 
+template <class Abi> simd_div_t<intv<Abi>> div(intv<Abi> numer, intv<Abi> denom); 
+template <class Abi> simd_div_t<longv<Abi>> div(longv<Abi> numer, longv<Abi> denom); 
+template <class Abi> simd_div_t<llongv<Abi>> div(llongv<Abi> numer, llongv<Abi> denom); 
+ 
+// [simd.mask.class] 
+template <class T, class Abi> 
+class simd_mask { 
+public: 
+  using value_type = bool; 
+  using reference = see below; 
+  using simd_type = simd<T, Abi>; 
+  using abi_type = Abi; 
+  static constexpr size_t size() noexcept; 
+  simd_mask() = default; 
+ 
+  // broadcast constructor 
+  explicit simd_mask(value_type) noexcept; 
+ 
+  // implicit type conversion constructor 
+  template <class U> simd_mask(const simd_mask<U, simd_abi::fixed_size<size()>>&) noexcept; 
+ 
+  // load constructor 
+  template <class Flags> simd_mask(const value_type* mem, Flags); 
+ 
+  // loads [simd.mask.copy] 
+  template <class Flags> void copy_from(const value_type* mem, Flags); 
+  template <class Flags> void copy_to(value_type* mem, Flags) const; 
+ 
+  // scalar access [simd.mask.subscr] 
+  reference operator[](size_t); 
+  value_type operator[](size_t) const; 
+ 
+  // unary operators [simd.mask.unary] 
+  simd_mask operator!() const noexcept; 
+ 
+  // simd_mask binary operators [simd.mask.binary] 
+  friend simd_mask operator&&(const simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask operator||(const simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask operator& (const simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask operator| (const simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask operator^ (const simd_mask&, const simd_mask&) noexcept; 
+ 
+  // simd_mask compound assignment [simd.mask.cassign] 
+  friend simd_mask& operator&=(simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask& operator|=(simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask& operator^=(simd_mask&, const simd_mask&) noexcept; 
+ 
+  // simd_mask compares [simd.mask.comparison] 
+  friend simd_mask operator==(const simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask operator!=(const simd_mask&, const simd_mask&) noexcept; 
+}; 
+ 
+} // parallelism_v2 
+} // std::experimental 
+ 
+*/ 
+ 
+#include <experimental/__config> 
 #include <algorithm>
-#include <array>
-#include <cstddef>
-#include <functional>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
+#include <array> 
+#include <cstddef> 
+#include <functional> 
+ 
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 
+#pragma GCC system_header 
+#endif 
+ 
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
 
-_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_SIMD
-
+_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_SIMD 
+ 
 #if _LIBCPP_STD_VER >= 17
 
-enum class _StorageKind {
-  _Scalar,
-  _Array,
+enum class _StorageKind { 
+  _Scalar, 
+  _Array, 
   _VecExt,
-};
-
-template <_StorageKind __kind, int _Np>
-struct __simd_abi {};
-
-template <class _Tp, class _Abi>
+}; 
+ 
+template <_StorageKind __kind, int _Np> 
+struct __simd_abi {}; 
+ 
+template <class _Tp, class _Abi> 
 class __simd_storage {};
-
-template <class _Tp, int __num_element>
+ 
+template <class _Tp, int __num_element> 
 class __simd_storage<_Tp, __simd_abi<_StorageKind::_Array, __num_element>> {
   std::array<_Tp, __num_element> __storage_;
 
@@ -693,9 +693,9 @@ public:
   void __set(size_t __index, _Tp __val) noexcept {
     __storage_[__index] = __val;
   }
-};
-
-template <class _Tp>
+}; 
+ 
+template <class _Tp> 
 class __simd_storage<_Tp, __simd_abi<_StorageKind::_Scalar, 1>> {
   _Tp __storage_;
 
@@ -710,8 +710,8 @@ public:
   void __set(size_t __index, _Tp __val) noexcept {
     (&__storage_)[__index] = __val;
   }
-};
-
+}; 
+ 
 #ifndef _LIBCPP_HAS_NO_VECTOR_EXTENSION
 
 constexpr size_t __floor_pow_of_2(size_t __val) {
@@ -906,43 +906,43 @@ public:
   }
 };
 
-template <class _To, class _From>
-constexpr decltype(_To{std::declval<_From>()}, true)
-__is_non_narrowing_convertible_impl(_From) {
-  return true;
-}
-
-template <class _To>
-constexpr bool __is_non_narrowing_convertible_impl(...) {
-  return false;
-}
-
-template <class _From, class _To>
-constexpr typename std::enable_if<std::is_arithmetic<_To>::value &&
-                                      std::is_arithmetic<_From>::value,
-                                  bool>::type
-__is_non_narrowing_arithmetic_convertible() {
-  return __is_non_narrowing_convertible_impl<_To>(_From{});
-}
-
-template <class _From, class _To>
-constexpr typename std::enable_if<!(std::is_arithmetic<_To>::value &&
-                                    std::is_arithmetic<_From>::value),
-                                  bool>::type
-__is_non_narrowing_arithmetic_convertible() {
-  return false;
-}
-
-template <class _Tp>
-constexpr _Tp __variadic_sum() {
-  return _Tp{};
-}
-
-template <class _Tp, class _Up, class... _Args>
-constexpr _Tp __variadic_sum(_Up __first, _Args... __rest) {
-  return static_cast<_Tp>(__first) + __variadic_sum<_Tp>(__rest...);
-}
-
+template <class _To, class _From> 
+constexpr decltype(_To{std::declval<_From>()}, true) 
+__is_non_narrowing_convertible_impl(_From) { 
+  return true; 
+} 
+ 
+template <class _To> 
+constexpr bool __is_non_narrowing_convertible_impl(...) { 
+  return false; 
+} 
+ 
+template <class _From, class _To> 
+constexpr typename std::enable_if<std::is_arithmetic<_To>::value && 
+                                      std::is_arithmetic<_From>::value, 
+                                  bool>::type 
+__is_non_narrowing_arithmetic_convertible() { 
+  return __is_non_narrowing_convertible_impl<_To>(_From{}); 
+} 
+ 
+template <class _From, class _To> 
+constexpr typename std::enable_if<!(std::is_arithmetic<_To>::value && 
+                                    std::is_arithmetic<_From>::value), 
+                                  bool>::type 
+__is_non_narrowing_arithmetic_convertible() { 
+  return false; 
+} 
+ 
+template <class _Tp> 
+constexpr _Tp __variadic_sum() { 
+  return _Tp{}; 
+} 
+ 
+template <class _Tp, class _Up, class... _Args> 
+constexpr _Tp __variadic_sum(_Up __first, _Args... __rest) { 
+  return static_cast<_Tp>(__first) + __variadic_sum<_Tp>(__rest...); 
+} 
+ 
 template <class _Tp>
 struct __nodeduce {
   using type = _Tp;
@@ -954,22 +954,22 @@ constexpr bool __vectorizable() {
          !std::is_volatile<_Tp>::value && !std::is_same<_Tp, bool>::value;
 }
 
-_LIBCPP_END_NAMESPACE_EXPERIMENTAL_SIMD
-_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_SIMD_ABI
-
-using scalar = __simd_abi<_StorageKind::_Scalar, 1>;
-
-template <int _Np>
-using fixed_size = __simd_abi<_StorageKind::_Array, _Np>;
-
-template <class _Tp>
+_LIBCPP_END_NAMESPACE_EXPERIMENTAL_SIMD 
+_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_SIMD_ABI 
+ 
+using scalar = __simd_abi<_StorageKind::_Scalar, 1>; 
+ 
+template <int _Np> 
+using fixed_size = __simd_abi<_StorageKind::_Array, _Np>; 
+ 
+template <class _Tp> 
 inline constexpr size_t max_fixed_size = 32;
 
-template <class _Tp>
-using compatible = fixed_size<16 / sizeof(_Tp)>;
+template <class _Tp> 
+using compatible = fixed_size<16 / sizeof(_Tp)>; 
 
 #ifndef _LIBCPP_HAS_NO_VECTOR_EXTENSION
-template <class _Tp>
+template <class _Tp> 
 using native = __simd_abi<_StorageKind::_VecExt,
                           _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES / sizeof(_Tp)>;
 #else
@@ -977,369 +977,369 @@ template <class _Tp>
 using native =
     fixed_size<_Tp, _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES / sizeof(_Tp)>;
 #endif // _LIBCPP_HAS_NO_VECTOR_EXTENSION
-
-_LIBCPP_END_NAMESPACE_EXPERIMENTAL_SIMD_ABI
-_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_SIMD
-
-template <class _Tp, class _Abi = simd_abi::compatible<_Tp>>
-class simd;
-template <class _Tp, class _Abi = simd_abi::compatible<_Tp>>
-class simd_mask;
-
-struct element_aligned_tag {};
-struct vector_aligned_tag {};
-template <size_t>
-struct overaligned_tag {};
+ 
+_LIBCPP_END_NAMESPACE_EXPERIMENTAL_SIMD_ABI 
+_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_SIMD 
+ 
+template <class _Tp, class _Abi = simd_abi::compatible<_Tp>> 
+class simd; 
+template <class _Tp, class _Abi = simd_abi::compatible<_Tp>> 
+class simd_mask; 
+ 
+struct element_aligned_tag {}; 
+struct vector_aligned_tag {}; 
+template <size_t> 
+struct overaligned_tag {}; 
 inline constexpr element_aligned_tag element_aligned{};
 inline constexpr vector_aligned_tag vector_aligned{};
-template <size_t _Np>
+template <size_t _Np> 
 inline constexpr overaligned_tag<_Np> overaligned{};
-
-// traits [simd.traits]
-template <class _Tp>
-struct is_abi_tag : std::integral_constant<bool, false> {};
-
-template <_StorageKind __kind, int _Np>
-struct is_abi_tag<__simd_abi<__kind, _Np>>
-    : std::integral_constant<bool, true> {};
-
-template <class _Tp>
-struct is_simd : std::integral_constant<bool, false> {};
-
-template <class _Tp, class _Abi>
-struct is_simd<simd<_Tp, _Abi>> : std::integral_constant<bool, true> {};
-
-template <class _Tp>
-struct is_simd_mask : std::integral_constant<bool, false> {};
-
-template <class _Tp, class _Abi>
-struct is_simd_mask<simd_mask<_Tp, _Abi>> : std::integral_constant<bool, true> {
-};
-
-template <class _Tp>
-struct is_simd_flag_type : std::integral_constant<bool, false> {};
-
-template <>
-struct is_simd_flag_type<element_aligned_tag>
-    : std::integral_constant<bool, true> {};
-
-template <>
-struct is_simd_flag_type<vector_aligned_tag>
-    : std::integral_constant<bool, true> {};
-
-template <size_t _Align>
-struct is_simd_flag_type<overaligned_tag<_Align>>
-    : std::integral_constant<bool, true> {};
-
-template <class _Tp>
+ 
+// traits [simd.traits] 
+template <class _Tp> 
+struct is_abi_tag : std::integral_constant<bool, false> {}; 
+ 
+template <_StorageKind __kind, int _Np> 
+struct is_abi_tag<__simd_abi<__kind, _Np>> 
+    : std::integral_constant<bool, true> {}; 
+ 
+template <class _Tp> 
+struct is_simd : std::integral_constant<bool, false> {}; 
+ 
+template <class _Tp, class _Abi> 
+struct is_simd<simd<_Tp, _Abi>> : std::integral_constant<bool, true> {}; 
+ 
+template <class _Tp> 
+struct is_simd_mask : std::integral_constant<bool, false> {}; 
+ 
+template <class _Tp, class _Abi> 
+struct is_simd_mask<simd_mask<_Tp, _Abi>> : std::integral_constant<bool, true> { 
+}; 
+ 
+template <class _Tp> 
+struct is_simd_flag_type : std::integral_constant<bool, false> {}; 
+ 
+template <> 
+struct is_simd_flag_type<element_aligned_tag> 
+    : std::integral_constant<bool, true> {}; 
+ 
+template <> 
+struct is_simd_flag_type<vector_aligned_tag> 
+    : std::integral_constant<bool, true> {}; 
+ 
+template <size_t _Align> 
+struct is_simd_flag_type<overaligned_tag<_Align>> 
+    : std::integral_constant<bool, true> {}; 
+ 
+template <class _Tp> 
 inline constexpr bool is_abi_tag_v = is_abi_tag<_Tp>::value;
-template <class _Tp>
+template <class _Tp> 
 inline constexpr bool is_simd_v = is_simd<_Tp>::value;
-template <class _Tp>
+template <class _Tp> 
 inline constexpr bool is_simd_mask_v = is_simd_mask<_Tp>::value;
-template <class _Tp>
+template <class _Tp> 
 inline constexpr bool is_simd_flag_type_v = is_simd_flag_type<_Tp>::value;
-template <class _Tp, size_t _Np>
-struct abi_for_size {
-  using type = simd_abi::fixed_size<_Np>;
-};
-template <class _Tp, size_t _Np>
-using abi_for_size_t = typename abi_for_size<_Tp, _Np>::type;
-
-template <class _Tp, class _Abi = simd_abi::compatible<_Tp>>
-struct simd_size;
-
-template <class _Tp, _StorageKind __kind, int _Np>
-struct simd_size<_Tp, __simd_abi<__kind, _Np>>
-    : std::integral_constant<size_t, _Np> {
-  static_assert(
-      std::is_arithmetic<_Tp>::value &&
-          !std::is_same<typename std::remove_const<_Tp>::type, bool>::value,
-      "Element type should be vectorizable");
-};
-
+template <class _Tp, size_t _Np> 
+struct abi_for_size { 
+  using type = simd_abi::fixed_size<_Np>; 
+}; 
+template <class _Tp, size_t _Np> 
+using abi_for_size_t = typename abi_for_size<_Tp, _Np>::type; 
+ 
+template <class _Tp, class _Abi = simd_abi::compatible<_Tp>> 
+struct simd_size; 
+ 
+template <class _Tp, _StorageKind __kind, int _Np> 
+struct simd_size<_Tp, __simd_abi<__kind, _Np>> 
+    : std::integral_constant<size_t, _Np> { 
+  static_assert( 
+      std::is_arithmetic<_Tp>::value && 
+          !std::is_same<typename std::remove_const<_Tp>::type, bool>::value, 
+      "Element type should be vectorizable"); 
+}; 
+ 
 // TODO: implement it.
-template <class _Tp, class _Up = typename _Tp::value_type>
-struct memory_alignment;
-
-template <class _Tp, class _Abi = simd_abi::compatible<_Tp>>
+template <class _Tp, class _Up = typename _Tp::value_type> 
+struct memory_alignment; 
+ 
+template <class _Tp, class _Abi = simd_abi::compatible<_Tp>> 
 inline constexpr size_t simd_size_v = simd_size<_Tp, _Abi>::value;
-
-template <class _Tp, class _Up = typename _Tp::value_type>
+ 
+template <class _Tp, class _Up = typename _Tp::value_type> 
 inline constexpr size_t memory_alignment_v = memory_alignment<_Tp, _Up>::value;
-
-// class template simd [simd.class]
-template <class _Tp>
-using native_simd = simd<_Tp, simd_abi::native<_Tp>>;
-template <class _Tp, int _Np>
-using fixed_size_simd = simd<_Tp, simd_abi::fixed_size<_Np>>;
-
-// class template simd_mask [simd.mask.class]
-template <class _Tp>
-using native_simd_mask = simd_mask<_Tp, simd_abi::native<_Tp>>;
-
-template <class _Tp, int _Np>
-using fixed_size_simd_mask = simd_mask<_Tp, simd_abi::fixed_size<_Np>>;
-
-// casts [simd.casts]
-template <class _Tp>
-struct __static_simd_cast_traits {
-  template <class _Up, class _Abi>
-  static simd<_Tp, _Abi> __apply(const simd<_Up, _Abi>& __v);
-};
-
-template <class _Tp, class _NewAbi>
-struct __static_simd_cast_traits<simd<_Tp, _NewAbi>> {
-  template <class _Up, class _Abi>
-  static typename std::enable_if<simd<_Up, _Abi>::size() ==
-                                     simd<_Tp, _NewAbi>::size(),
-                                 simd<_Tp, _NewAbi>>::type
-  __apply(const simd<_Up, _Abi>& __v);
-};
-
-template <class _Tp>
-struct __simd_cast_traits {
-  template <class _Up, class _Abi>
-  static typename std::enable_if<
-      __is_non_narrowing_arithmetic_convertible<_Up, _Tp>(),
-      simd<_Tp, _Abi>>::type
-  __apply(const simd<_Up, _Abi>& __v);
-};
-
-template <class _Tp, class _NewAbi>
-struct __simd_cast_traits<simd<_Tp, _NewAbi>> {
-  template <class _Up, class _Abi>
-  static typename std::enable_if<
-      __is_non_narrowing_arithmetic_convertible<_Up, _Tp>() &&
-          simd<_Up, _Abi>::size() == simd<_Tp, _NewAbi>::size(),
-      simd<_Tp, _NewAbi>>::type
-  __apply(const simd<_Up, _Abi>& __v);
-};
-
-template <class _Tp, class _Up, class _Abi>
-auto simd_cast(const simd<_Up, _Abi>& __v)
-    -> decltype(__simd_cast_traits<_Tp>::__apply(__v)) {
-  return __simd_cast_traits<_Tp>::__apply(__v);
-}
-
-template <class _Tp, class _Up, class _Abi>
-auto static_simd_cast(const simd<_Up, _Abi>& __v)
-    -> decltype(__static_simd_cast_traits<_Tp>::__apply(__v)) {
-  return __static_simd_cast_traits<_Tp>::__apply(__v);
-}
-
-template <class _Tp, class _Abi>
-fixed_size_simd<_Tp, simd_size<_Tp, _Abi>::value>
-to_fixed_size(const simd<_Tp, _Abi>&) noexcept;
-
-template <class _Tp, class _Abi>
-fixed_size_simd_mask<_Tp, simd_size<_Tp, _Abi>::value>
-to_fixed_size(const simd_mask<_Tp, _Abi>&) noexcept;
-
-template <class _Tp, size_t _Np>
-native_simd<_Tp> to_native(const fixed_size_simd<_Tp, _Np>&) noexcept;
-
-template <class _Tp, size_t _Np>
-native_simd_mask<_Tp> to_native(const fixed_size_simd_mask<_Tp, _Np>&) noexcept;
-
-template <class _Tp, size_t _Np>
-simd<_Tp> to_compatible(const fixed_size_simd<_Tp, _Np>&) noexcept;
-
-template <class _Tp, size_t _Np>
-simd_mask<_Tp> to_compatible(const fixed_size_simd_mask<_Tp, _Np>&) noexcept;
-
-template <size_t... __sizes, class _Tp, class _Abi>
-tuple<simd<_Tp, abi_for_size_t<_Tp, __sizes>>...> split(const simd<_Tp, _Abi>&);
-
-template <size_t... __sizes, class _Tp, class _Abi>
-tuple<simd_mask<_Tp, abi_for_size_t<_Tp, __sizes>>...>
-split(const simd_mask<_Tp, _Abi>&);
-
-template <class _SimdType, class _Abi>
-array<_SimdType, simd_size<typename _SimdType::value_type, _Abi>::value /
-                     _SimdType::size()>
-split(const simd<typename _SimdType::value_type, _Abi>&);
-
-template <class _SimdType, class _Abi>
-array<_SimdType, simd_size<typename _SimdType::value_type, _Abi>::value /
-                     _SimdType::size()>
-split(const simd_mask<typename _SimdType::value_type, _Abi>&);
-
-template <class _Tp, class... _Abis>
-simd<_Tp, abi_for_size_t<_Tp, __variadic_sum(simd_size<_Tp, _Abis>::value...)>>
-concat(const simd<_Tp, _Abis>&...);
-
-template <class _Tp, class... _Abis>
-simd_mask<_Tp,
-          abi_for_size_t<_Tp, __variadic_sum(simd_size<_Tp, _Abis>::value...)>>
-concat(const simd_mask<_Tp, _Abis>&...);
-
-// reductions [simd.mask.reductions]
-template <class _Tp, class _Abi>
-bool all_of(const simd_mask<_Tp, _Abi>&) noexcept;
-template <class _Tp, class _Abi>
-bool any_of(const simd_mask<_Tp, _Abi>&) noexcept;
-template <class _Tp, class _Abi>
-bool none_of(const simd_mask<_Tp, _Abi>&) noexcept;
-template <class _Tp, class _Abi>
-bool some_of(const simd_mask<_Tp, _Abi>&) noexcept;
-template <class _Tp, class _Abi>
-int popcount(const simd_mask<_Tp, _Abi>&) noexcept;
-template <class _Tp, class _Abi>
-int find_first_set(const simd_mask<_Tp, _Abi>&);
-template <class _Tp, class _Abi>
-int find_last_set(const simd_mask<_Tp, _Abi>&);
-bool all_of(bool) noexcept;
-bool any_of(bool) noexcept;
-bool none_of(bool) noexcept;
-bool some_of(bool) noexcept;
-int popcount(bool) noexcept;
-int find_first_set(bool) noexcept;
-int find_last_set(bool) noexcept;
-
-// masked assignment [simd.whereexpr]
-template <class _MaskType, class _Tp>
-class const_where_expression;
-template <class _MaskType, class _Tp>
-class where_expression;
-
-// masked assignment [simd.mask.where]
-template <class _Tp, class _Abi>
-where_expression<simd_mask<_Tp, _Abi>, simd<_Tp, _Abi>>
-where(const typename simd<_Tp, _Abi>::mask_type&, simd<_Tp, _Abi>&) noexcept;
-
-template <class _Tp, class _Abi>
-const_where_expression<simd_mask<_Tp, _Abi>, const simd<_Tp, _Abi>>
-where(const typename simd<_Tp, _Abi>::mask_type&,
-      const simd<_Tp, _Abi>&) noexcept;
-
-template <class _Tp, class _Abi>
-where_expression<simd_mask<_Tp, _Abi>, simd_mask<_Tp, _Abi>>
-where(const typename __nodeduce<simd_mask<_Tp, _Abi>>::type&,
-      simd_mask<_Tp, _Abi>&) noexcept;
-
-template <class _Tp, class _Abi>
-const_where_expression<simd_mask<_Tp, _Abi>, const simd_mask<_Tp, _Abi>>
-where(const typename __nodeduce<simd_mask<_Tp, _Abi>>::type&,
-      const simd_mask<_Tp, _Abi>&) noexcept;
-
-template <class _Tp>
-where_expression<bool, _Tp> where(bool, _Tp&) noexcept;
-
-template <class _Tp>
-const_where_expression<bool, const _Tp> where(bool, const _Tp&) noexcept;
-
-// reductions [simd.reductions]
-template <class _Tp, class _Abi, class _BinaryOp = std::plus<_Tp>>
-_Tp reduce(const simd<_Tp, _Abi>&, _BinaryOp = _BinaryOp());
-
-template <class _MaskType, class _SimdType, class _BinaryOp>
-typename _SimdType::value_type
-reduce(const const_where_expression<_MaskType, _SimdType>&,
-       typename _SimdType::value_type neutral_element, _BinaryOp binary_op);
-
-template <class _MaskType, class _SimdType>
-typename _SimdType::value_type
-reduce(const const_where_expression<_MaskType, _SimdType>&,
-       plus<typename _SimdType::value_type> binary_op = {});
-
-template <class _MaskType, class _SimdType>
-typename _SimdType::value_type
-reduce(const const_where_expression<_MaskType, _SimdType>&,
-       multiplies<typename _SimdType::value_type> binary_op);
-
-template <class _MaskType, class _SimdType>
-typename _SimdType::value_type
-reduce(const const_where_expression<_MaskType, _SimdType>&,
-       bit_and<typename _SimdType::value_type> binary_op);
-
-template <class _MaskType, class _SimdType>
-typename _SimdType::value_type
-reduce(const const_where_expression<_MaskType, _SimdType>&,
-       bit_or<typename _SimdType::value_type> binary_op);
-
-template <class _MaskType, class _SimdType>
-typename _SimdType::value_type
-reduce(const const_where_expression<_MaskType, _SimdType>&,
-       bit_xor<typename _SimdType::value_type> binary_op);
-
-template <class _Tp, class _Abi>
-_Tp hmin(const simd<_Tp, _Abi>&);
-template <class _MaskType, class _SimdType>
-typename _SimdType::value_type
-hmin(const const_where_expression<_MaskType, _SimdType>&);
-template <class _Tp, class _Abi>
-_Tp hmax(const simd<_Tp, _Abi>&);
-template <class _MaskType, class _SimdType>
-typename _SimdType::value_type
-hmax(const const_where_expression<_MaskType, _SimdType>&);
-
-// algorithms [simd.alg]
-template <class _Tp, class _Abi>
-simd<_Tp, _Abi> min(const simd<_Tp, _Abi>&, const simd<_Tp, _Abi>&) noexcept;
-
-template <class _Tp, class _Abi>
-simd<_Tp, _Abi> max(const simd<_Tp, _Abi>&, const simd<_Tp, _Abi>&) noexcept;
-
-template <class _Tp, class _Abi>
-std::pair<simd<_Tp, _Abi>, simd<_Tp, _Abi>>
-minmax(const simd<_Tp, _Abi>&, const simd<_Tp, _Abi>&) noexcept;
-
-template <class _Tp, class _Abi>
-simd<_Tp, _Abi> clamp(const simd<_Tp, _Abi>&, const simd<_Tp, _Abi>&,
-                      const simd<_Tp, _Abi>&);
-
-// [simd.whereexpr]
-// TODO implement where expressions.
-template <class _MaskType, class _Tp>
-class const_where_expression {
-public:
-  const_where_expression(const const_where_expression&) = delete;
-  const_where_expression& operator=(const const_where_expression&) = delete;
-  typename remove_const<_Tp>::type operator-() const&&;
-  template <class _Up, class _Flags>
-  void copy_to(_Up*, _Flags) const&&;
-};
-
-template <class _MaskType, class _Tp>
-class where_expression : public const_where_expression<_MaskType, _Tp> {
-public:
-  where_expression(const where_expression&) = delete;
-  where_expression& operator=(const where_expression&) = delete;
-  template <class _Up>
-  void operator=(_Up&&);
-  template <class _Up>
-  void operator+=(_Up&&);
-  template <class _Up>
-  void operator-=(_Up&&);
-  template <class _Up>
-  void operator*=(_Up&&);
-  template <class _Up>
-  void operator/=(_Up&&);
-  template <class _Up>
-  void operator%=(_Up&&);
-  template <class _Up>
-  void operator&=(_Up&&);
-  template <class _Up>
-  void operator|=(_Up&&);
-  template <class _Up>
-  void operator^=(_Up&&);
-  template <class _Up>
-  void operator<<=(_Up&&);
-  template <class _Up>
-  void operator>>=(_Up&&);
-  void operator++();
-  void operator++(int);
-  void operator--();
-  void operator--(int);
-  template <class _Up, class _Flags>
-  void copy_from(const _Up*, _Flags);
-};
-
-// [simd.class]
-// TODO: implement simd
-template <class _Tp, class _Abi>
-class simd {
+ 
+// class template simd [simd.class] 
+template <class _Tp> 
+using native_simd = simd<_Tp, simd_abi::native<_Tp>>; 
+template <class _Tp, int _Np> 
+using fixed_size_simd = simd<_Tp, simd_abi::fixed_size<_Np>>; 
+ 
+// class template simd_mask [simd.mask.class] 
+template <class _Tp> 
+using native_simd_mask = simd_mask<_Tp, simd_abi::native<_Tp>>; 
+ 
+template <class _Tp, int _Np> 
+using fixed_size_simd_mask = simd_mask<_Tp, simd_abi::fixed_size<_Np>>; 
+ 
+// casts [simd.casts] 
+template <class _Tp> 
+struct __static_simd_cast_traits { 
+  template <class _Up, class _Abi> 
+  static simd<_Tp, _Abi> __apply(const simd<_Up, _Abi>& __v); 
+}; 
+ 
+template <class _Tp, class _NewAbi> 
+struct __static_simd_cast_traits<simd<_Tp, _NewAbi>> { 
+  template <class _Up, class _Abi> 
+  static typename std::enable_if<simd<_Up, _Abi>::size() == 
+                                     simd<_Tp, _NewAbi>::size(), 
+                                 simd<_Tp, _NewAbi>>::type 
+  __apply(const simd<_Up, _Abi>& __v); 
+}; 
+ 
+template <class _Tp> 
+struct __simd_cast_traits { 
+  template <class _Up, class _Abi> 
+  static typename std::enable_if< 
+      __is_non_narrowing_arithmetic_convertible<_Up, _Tp>(), 
+      simd<_Tp, _Abi>>::type 
+  __apply(const simd<_Up, _Abi>& __v); 
+}; 
+ 
+template <class _Tp, class _NewAbi> 
+struct __simd_cast_traits<simd<_Tp, _NewAbi>> { 
+  template <class _Up, class _Abi> 
+  static typename std::enable_if< 
+      __is_non_narrowing_arithmetic_convertible<_Up, _Tp>() && 
+          simd<_Up, _Abi>::size() == simd<_Tp, _NewAbi>::size(), 
+      simd<_Tp, _NewAbi>>::type 
+  __apply(const simd<_Up, _Abi>& __v); 
+}; 
+ 
+template <class _Tp, class _Up, class _Abi> 
+auto simd_cast(const simd<_Up, _Abi>& __v) 
+    -> decltype(__simd_cast_traits<_Tp>::__apply(__v)) { 
+  return __simd_cast_traits<_Tp>::__apply(__v); 
+} 
+ 
+template <class _Tp, class _Up, class _Abi> 
+auto static_simd_cast(const simd<_Up, _Abi>& __v) 
+    -> decltype(__static_simd_cast_traits<_Tp>::__apply(__v)) { 
+  return __static_simd_cast_traits<_Tp>::__apply(__v); 
+} 
+ 
+template <class _Tp, class _Abi> 
+fixed_size_simd<_Tp, simd_size<_Tp, _Abi>::value> 
+to_fixed_size(const simd<_Tp, _Abi>&) noexcept; 
+ 
+template <class _Tp, class _Abi> 
+fixed_size_simd_mask<_Tp, simd_size<_Tp, _Abi>::value> 
+to_fixed_size(const simd_mask<_Tp, _Abi>&) noexcept; 
+ 
+template <class _Tp, size_t _Np> 
+native_simd<_Tp> to_native(const fixed_size_simd<_Tp, _Np>&) noexcept; 
+ 
+template <class _Tp, size_t _Np> 
+native_simd_mask<_Tp> to_native(const fixed_size_simd_mask<_Tp, _Np>&) noexcept; 
+ 
+template <class _Tp, size_t _Np> 
+simd<_Tp> to_compatible(const fixed_size_simd<_Tp, _Np>&) noexcept; 
+ 
+template <class _Tp, size_t _Np> 
+simd_mask<_Tp> to_compatible(const fixed_size_simd_mask<_Tp, _Np>&) noexcept; 
+ 
+template <size_t... __sizes, class _Tp, class _Abi> 
+tuple<simd<_Tp, abi_for_size_t<_Tp, __sizes>>...> split(const simd<_Tp, _Abi>&); 
+ 
+template <size_t... __sizes, class _Tp, class _Abi> 
+tuple<simd_mask<_Tp, abi_for_size_t<_Tp, __sizes>>...> 
+split(const simd_mask<_Tp, _Abi>&); 
+ 
+template <class _SimdType, class _Abi> 
+array<_SimdType, simd_size<typename _SimdType::value_type, _Abi>::value / 
+                     _SimdType::size()> 
+split(const simd<typename _SimdType::value_type, _Abi>&); 
+ 
+template <class _SimdType, class _Abi> 
+array<_SimdType, simd_size<typename _SimdType::value_type, _Abi>::value / 
+                     _SimdType::size()> 
+split(const simd_mask<typename _SimdType::value_type, _Abi>&); 
+ 
+template <class _Tp, class... _Abis> 
+simd<_Tp, abi_for_size_t<_Tp, __variadic_sum(simd_size<_Tp, _Abis>::value...)>> 
+concat(const simd<_Tp, _Abis>&...); 
+ 
+template <class _Tp, class... _Abis> 
+simd_mask<_Tp, 
+          abi_for_size_t<_Tp, __variadic_sum(simd_size<_Tp, _Abis>::value...)>> 
+concat(const simd_mask<_Tp, _Abis>&...); 
+ 
+// reductions [simd.mask.reductions] 
+template <class _Tp, class _Abi> 
+bool all_of(const simd_mask<_Tp, _Abi>&) noexcept; 
+template <class _Tp, class _Abi> 
+bool any_of(const simd_mask<_Tp, _Abi>&) noexcept; 
+template <class _Tp, class _Abi> 
+bool none_of(const simd_mask<_Tp, _Abi>&) noexcept; 
+template <class _Tp, class _Abi> 
+bool some_of(const simd_mask<_Tp, _Abi>&) noexcept; 
+template <class _Tp, class _Abi> 
+int popcount(const simd_mask<_Tp, _Abi>&) noexcept; 
+template <class _Tp, class _Abi> 
+int find_first_set(const simd_mask<_Tp, _Abi>&); 
+template <class _Tp, class _Abi> 
+int find_last_set(const simd_mask<_Tp, _Abi>&); 
+bool all_of(bool) noexcept; 
+bool any_of(bool) noexcept; 
+bool none_of(bool) noexcept; 
+bool some_of(bool) noexcept; 
+int popcount(bool) noexcept; 
+int find_first_set(bool) noexcept; 
+int find_last_set(bool) noexcept; 
+ 
+// masked assignment [simd.whereexpr] 
+template <class _MaskType, class _Tp> 
+class const_where_expression; 
+template <class _MaskType, class _Tp> 
+class where_expression; 
+ 
+// masked assignment [simd.mask.where] 
+template <class _Tp, class _Abi> 
+where_expression<simd_mask<_Tp, _Abi>, simd<_Tp, _Abi>> 
+where(const typename simd<_Tp, _Abi>::mask_type&, simd<_Tp, _Abi>&) noexcept; 
+ 
+template <class _Tp, class _Abi> 
+const_where_expression<simd_mask<_Tp, _Abi>, const simd<_Tp, _Abi>> 
+where(const typename simd<_Tp, _Abi>::mask_type&, 
+      const simd<_Tp, _Abi>&) noexcept; 
+ 
+template <class _Tp, class _Abi> 
+where_expression<simd_mask<_Tp, _Abi>, simd_mask<_Tp, _Abi>> 
+where(const typename __nodeduce<simd_mask<_Tp, _Abi>>::type&, 
+      simd_mask<_Tp, _Abi>&) noexcept; 
+ 
+template <class _Tp, class _Abi> 
+const_where_expression<simd_mask<_Tp, _Abi>, const simd_mask<_Tp, _Abi>> 
+where(const typename __nodeduce<simd_mask<_Tp, _Abi>>::type&, 
+      const simd_mask<_Tp, _Abi>&) noexcept; 
+ 
+template <class _Tp> 
+where_expression<bool, _Tp> where(bool, _Tp&) noexcept; 
+ 
+template <class _Tp> 
+const_where_expression<bool, const _Tp> where(bool, const _Tp&) noexcept; 
+ 
+// reductions [simd.reductions] 
+template <class _Tp, class _Abi, class _BinaryOp = std::plus<_Tp>> 
+_Tp reduce(const simd<_Tp, _Abi>&, _BinaryOp = _BinaryOp()); 
+ 
+template <class _MaskType, class _SimdType, class _BinaryOp> 
+typename _SimdType::value_type 
+reduce(const const_where_expression<_MaskType, _SimdType>&, 
+       typename _SimdType::value_type neutral_element, _BinaryOp binary_op); 
+ 
+template <class _MaskType, class _SimdType> 
+typename _SimdType::value_type 
+reduce(const const_where_expression<_MaskType, _SimdType>&, 
+       plus<typename _SimdType::value_type> binary_op = {}); 
+ 
+template <class _MaskType, class _SimdType> 
+typename _SimdType::value_type 
+reduce(const const_where_expression<_MaskType, _SimdType>&, 
+       multiplies<typename _SimdType::value_type> binary_op); 
+ 
+template <class _MaskType, class _SimdType> 
+typename _SimdType::value_type 
+reduce(const const_where_expression<_MaskType, _SimdType>&, 
+       bit_and<typename _SimdType::value_type> binary_op); 
+ 
+template <class _MaskType, class _SimdType> 
+typename _SimdType::value_type 
+reduce(const const_where_expression<_MaskType, _SimdType>&, 
+       bit_or<typename _SimdType::value_type> binary_op); 
+ 
+template <class _MaskType, class _SimdType> 
+typename _SimdType::value_type 
+reduce(const const_where_expression<_MaskType, _SimdType>&, 
+       bit_xor<typename _SimdType::value_type> binary_op); 
+ 
+template <class _Tp, class _Abi> 
+_Tp hmin(const simd<_Tp, _Abi>&); 
+template <class _MaskType, class _SimdType> 
+typename _SimdType::value_type 
+hmin(const const_where_expression<_MaskType, _SimdType>&); 
+template <class _Tp, class _Abi> 
+_Tp hmax(const simd<_Tp, _Abi>&); 
+template <class _MaskType, class _SimdType> 
+typename _SimdType::value_type 
+hmax(const const_where_expression<_MaskType, _SimdType>&); 
+ 
+// algorithms [simd.alg] 
+template <class _Tp, class _Abi> 
+simd<_Tp, _Abi> min(const simd<_Tp, _Abi>&, const simd<_Tp, _Abi>&) noexcept; 
+ 
+template <class _Tp, class _Abi> 
+simd<_Tp, _Abi> max(const simd<_Tp, _Abi>&, const simd<_Tp, _Abi>&) noexcept; 
+ 
+template <class _Tp, class _Abi> 
+std::pair<simd<_Tp, _Abi>, simd<_Tp, _Abi>> 
+minmax(const simd<_Tp, _Abi>&, const simd<_Tp, _Abi>&) noexcept; 
+ 
+template <class _Tp, class _Abi> 
+simd<_Tp, _Abi> clamp(const simd<_Tp, _Abi>&, const simd<_Tp, _Abi>&, 
+                      const simd<_Tp, _Abi>&); 
+ 
+// [simd.whereexpr] 
+// TODO implement where expressions. 
+template <class _MaskType, class _Tp> 
+class const_where_expression { 
+public: 
+  const_where_expression(const const_where_expression&) = delete; 
+  const_where_expression& operator=(const const_where_expression&) = delete; 
+  typename remove_const<_Tp>::type operator-() const&&; 
+  template <class _Up, class _Flags> 
+  void copy_to(_Up*, _Flags) const&&; 
+}; 
+ 
+template <class _MaskType, class _Tp> 
+class where_expression : public const_where_expression<_MaskType, _Tp> { 
+public: 
+  where_expression(const where_expression&) = delete; 
+  where_expression& operator=(const where_expression&) = delete; 
+  template <class _Up> 
+  void operator=(_Up&&); 
+  template <class _Up> 
+  void operator+=(_Up&&); 
+  template <class _Up> 
+  void operator-=(_Up&&); 
+  template <class _Up> 
+  void operator*=(_Up&&); 
+  template <class _Up> 
+  void operator/=(_Up&&); 
+  template <class _Up> 
+  void operator%=(_Up&&); 
+  template <class _Up> 
+  void operator&=(_Up&&); 
+  template <class _Up> 
+  void operator|=(_Up&&); 
+  template <class _Up> 
+  void operator^=(_Up&&); 
+  template <class _Up> 
+  void operator<<=(_Up&&); 
+  template <class _Up> 
+  void operator>>=(_Up&&); 
+  void operator++(); 
+  void operator++(int); 
+  void operator--(); 
+  void operator--(int); 
+  template <class _Up, class _Flags> 
+  void copy_from(const _Up*, _Flags); 
+}; 
+ 
+// [simd.class] 
+// TODO: implement simd 
+template <class _Tp, class _Abi> 
+class simd { 
 public:
   using value_type = _Tp;
   using reference = __simd_reference<_Tp, _Tp, _Abi>;
@@ -1354,21 +1354,21 @@ public:
     return simd_size<_Tp, _Abi>::value;
   }
 
-private:
+private: 
   __simd_storage<_Tp, _Abi> __s_;
 
-  template <class _Up>
-  static constexpr bool __can_broadcast() {
-    return (std::is_arithmetic<_Up>::value &&
-            __is_non_narrowing_arithmetic_convertible<_Up, _Tp>()) ||
-           (!std::is_arithmetic<_Up>::value &&
-            std::is_convertible<_Up, _Tp>::value) ||
-           std::is_same<typename std::remove_const<_Up>::type, int>::value ||
-           (std::is_same<typename std::remove_const<_Up>::type,
-                         unsigned int>::value &&
-            std::is_unsigned<_Tp>::value);
-  }
-
+  template <class _Up> 
+  static constexpr bool __can_broadcast() { 
+    return (std::is_arithmetic<_Up>::value && 
+            __is_non_narrowing_arithmetic_convertible<_Up, _Tp>()) || 
+           (!std::is_arithmetic<_Up>::value && 
+            std::is_convertible<_Up, _Tp>::value) || 
+           std::is_same<typename std::remove_const<_Up>::type, int>::value || 
+           (std::is_same<typename std::remove_const<_Up>::type, 
+                         unsigned int>::value && 
+            std::is_unsigned<_Tp>::value); 
+  } 
+ 
   template <class _Generator, size_t... __indicies>
   static constexpr decltype(
       std::forward_as_tuple(std::declval<_Generator>()(
@@ -1379,44 +1379,44 @@ private:
         !__can_broadcast<decltype(std::declval<_Generator>()(
             std::integral_constant<size_t, __indicies>()))>()...);
   }
-
+ 
   template <class _Generator>
   static bool __can_generate(...) {
     return false;
   }
-
+ 
   template <class _Generator, size_t... __indicies>
   void __generator_init(_Generator&& __g, std::index_sequence<__indicies...>) {
     int __not_used[]{((*this)[__indicies] =
                           __g(std::integral_constant<size_t, __indicies>()),
                       0)...};
     (void)__not_used;
-  }
-
+  } 
+ 
 public:
-  // implicit type conversion constructor
-  template <class _Up,
-            class = typename std::enable_if<
-                std::is_same<_Abi, simd_abi::fixed_size<size()>>::value &&
-                __is_non_narrowing_arithmetic_convertible<_Up, _Tp>()>::type>
+  // implicit type conversion constructor 
+  template <class _Up, 
+            class = typename std::enable_if< 
+                std::is_same<_Abi, simd_abi::fixed_size<size()>>::value && 
+                __is_non_narrowing_arithmetic_convertible<_Up, _Tp>()>::type> 
   simd(const simd<_Up, simd_abi::fixed_size<size()>>& __v) {
     for (size_t __i = 0; __i < size(); __i++) {
       (*this)[__i] = static_cast<_Tp>(__v[__i]);
     }
   }
-
-  // implicit broadcast constructor
-  template <class _Up,
-            class = typename std::enable_if<__can_broadcast<_Up>()>::type>
+ 
+  // implicit broadcast constructor 
+  template <class _Up, 
+            class = typename std::enable_if<__can_broadcast<_Up>()>::type> 
   simd(_Up&& __rv) {
     auto __v = static_cast<_Tp>(__rv);
     for (size_t __i = 0; __i < size(); __i++) {
       (*this)[__i] = __v;
     }
   }
-
-  // generator constructor
-  template <class _Generator,
+ 
+  // generator constructor 
+  template <class _Generator, 
             int = typename std::enable_if<
                 __can_generate<_Generator>(std::make_index_sequence<size()>()),
                 int>::type()>
@@ -1424,8 +1424,8 @@ public:
     __generator_init(std::forward<_Generator>(__g),
                      std::make_index_sequence<size()>());
   }
-
-  // load constructor
+ 
+  // load constructor 
   template <
       class _Up, class _Flags,
       class = typename std::enable_if<__vectorizable<_Up>()>::type,
@@ -1436,17 +1436,17 @@ public:
       (*this)[__i] = static_cast<_Tp>(__buffer[__i]);
     }
   }
-
-  // loads [simd.load]
-  template <class _Up, class _Flags>
+ 
+  // loads [simd.load] 
+  template <class _Up, class _Flags> 
   typename std::enable_if<__vectorizable<_Up>() &&
                           is_simd_flag_type<_Flags>::value>::type
   copy_from(const _Up* __buffer, _Flags) {
     *this = simd(__buffer, _Flags());
   }
-
-  // stores [simd.store]
-  template <class _Up, class _Flags>
+ 
+  // stores [simd.store] 
+  template <class _Up, class _Flags> 
   typename std::enable_if<__vectorizable<_Up>() &&
                           is_simd_flag_type<_Flags>::value>::type
   copy_to(_Up* __buffer, _Flags) const {
@@ -1455,118 +1455,118 @@ public:
       __buffer[__i] = static_cast<_Up>((*this)[__i]);
     }
   }
-
-  // scalar access [simd.subscr]
+ 
+  // scalar access [simd.subscr] 
   reference operator[](size_t __i) { return reference(&__s_, __i); }
-
+ 
   value_type operator[](size_t __i) const { return __s_.__get(__i); }
 
-  // unary operators [simd.unary]
-  simd& operator++();
-  simd operator++(int);
-  simd& operator--();
-  simd operator--(int);
-  mask_type operator!() const;
-  simd operator~() const;
-  simd operator+() const;
-  simd operator-() const;
-
-  // binary operators [simd.binary]
-  friend simd operator+(const simd&, const simd&);
-  friend simd operator-(const simd&, const simd&);
-  friend simd operator*(const simd&, const simd&);
-  friend simd operator/(const simd&, const simd&);
-  friend simd operator%(const simd&, const simd&);
-  friend simd operator&(const simd&, const simd&);
-  friend simd operator|(const simd&, const simd&);
-  friend simd operator^(const simd&, const simd&);
-  friend simd operator<<(const simd&, const simd&);
-  friend simd operator>>(const simd&, const simd&);
-  friend simd operator<<(const simd&, int);
-  friend simd operator>>(const simd&, int);
-
-  // compound assignment [simd.cassign]
-  friend simd& operator+=(simd&, const simd&);
-  friend simd& operator-=(simd&, const simd&);
-  friend simd& operator*=(simd&, const simd&);
-  friend simd& operator/=(simd&, const simd&);
-  friend simd& operator%=(simd&, const simd&);
-
-  friend simd& operator&=(simd&, const simd&);
-  friend simd& operator|=(simd&, const simd&);
-  friend simd& operator^=(simd&, const simd&);
-  friend simd& operator<<=(simd&, const simd&);
-  friend simd& operator>>=(simd&, const simd&);
-  friend simd& operator<<=(simd&, int);
-  friend simd& operator>>=(simd&, int);
-
-  // compares [simd.comparison]
-  friend mask_type operator==(const simd&, const simd&);
-  friend mask_type operator!=(const simd&, const simd&);
-  friend mask_type operator>=(const simd&, const simd&);
-  friend mask_type operator<=(const simd&, const simd&);
-  friend mask_type operator>(const simd&, const simd&);
-  friend mask_type operator<(const simd&, const simd&);
-};
-
-// [simd.mask.class]
-template <class _Tp, class _Abi>
-// TODO: implement simd_mask
-class simd_mask {
-public:
-  using value_type = bool;
-  // TODO: this is strawman implementation. Turn it into a proxy type.
-  using reference = bool&;
-  using simd_type = simd<_Tp, _Abi>;
-  using abi_type = _Abi;
-  static constexpr size_t size() noexcept;
-  simd_mask() = default;
-
-  // broadcast constructor
-  explicit simd_mask(value_type) noexcept;
-
-  // implicit type conversion constructor
-  template <class _Up>
-  simd_mask(const simd_mask<_Up, simd_abi::fixed_size<size()>>&) noexcept;
-
-  // load constructor
-  template <class _Flags>
-  simd_mask(const value_type*, _Flags);
-
-  // loads [simd.mask.copy]
-  template <class _Flags>
-  void copy_from(const value_type*, _Flags);
-  template <class _Flags>
-  void copy_to(value_type*, _Flags) const;
-
-  // scalar access [simd.mask.subscr]
-  reference operator[](size_t);
-  value_type operator[](size_t) const;
-
-  // unary operators [simd.mask.unary]
-  simd_mask operator!() const noexcept;
-
-  // simd_mask binary operators [simd.mask.binary]
-  friend simd_mask operator&&(const simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask operator||(const simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask operator&(const simd_mask&, const simd_mask&)noexcept;
-  friend simd_mask operator|(const simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask operator^(const simd_mask&, const simd_mask&) noexcept;
-
-  // simd_mask compound assignment [simd.mask.cassign]
-  friend simd_mask& operator&=(simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask& operator|=(simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask& operator^=(simd_mask&, const simd_mask&) noexcept;
-
-  // simd_mask compares [simd.mask.comparison]
-  friend simd_mask operator==(const simd_mask&, const simd_mask&) noexcept;
-  friend simd_mask operator!=(const simd_mask&, const simd_mask&) noexcept;
-};
-
+  // unary operators [simd.unary] 
+  simd& operator++(); 
+  simd operator++(int); 
+  simd& operator--(); 
+  simd operator--(int); 
+  mask_type operator!() const; 
+  simd operator~() const; 
+  simd operator+() const; 
+  simd operator-() const; 
+ 
+  // binary operators [simd.binary] 
+  friend simd operator+(const simd&, const simd&); 
+  friend simd operator-(const simd&, const simd&); 
+  friend simd operator*(const simd&, const simd&); 
+  friend simd operator/(const simd&, const simd&); 
+  friend simd operator%(const simd&, const simd&); 
+  friend simd operator&(const simd&, const simd&); 
+  friend simd operator|(const simd&, const simd&); 
+  friend simd operator^(const simd&, const simd&); 
+  friend simd operator<<(const simd&, const simd&); 
+  friend simd operator>>(const simd&, const simd&); 
+  friend simd operator<<(const simd&, int); 
+  friend simd operator>>(const simd&, int); 
+ 
+  // compound assignment [simd.cassign] 
+  friend simd& operator+=(simd&, const simd&); 
+  friend simd& operator-=(simd&, const simd&); 
+  friend simd& operator*=(simd&, const simd&); 
+  friend simd& operator/=(simd&, const simd&); 
+  friend simd& operator%=(simd&, const simd&); 
+ 
+  friend simd& operator&=(simd&, const simd&); 
+  friend simd& operator|=(simd&, const simd&); 
+  friend simd& operator^=(simd&, const simd&); 
+  friend simd& operator<<=(simd&, const simd&); 
+  friend simd& operator>>=(simd&, const simd&); 
+  friend simd& operator<<=(simd&, int); 
+  friend simd& operator>>=(simd&, int); 
+ 
+  // compares [simd.comparison] 
+  friend mask_type operator==(const simd&, const simd&); 
+  friend mask_type operator!=(const simd&, const simd&); 
+  friend mask_type operator>=(const simd&, const simd&); 
+  friend mask_type operator<=(const simd&, const simd&); 
+  friend mask_type operator>(const simd&, const simd&); 
+  friend mask_type operator<(const simd&, const simd&); 
+}; 
+ 
+// [simd.mask.class] 
+template <class _Tp, class _Abi> 
+// TODO: implement simd_mask 
+class simd_mask { 
+public: 
+  using value_type = bool; 
+  // TODO: this is strawman implementation. Turn it into a proxy type. 
+  using reference = bool&; 
+  using simd_type = simd<_Tp, _Abi>; 
+  using abi_type = _Abi; 
+  static constexpr size_t size() noexcept; 
+  simd_mask() = default; 
+ 
+  // broadcast constructor 
+  explicit simd_mask(value_type) noexcept; 
+ 
+  // implicit type conversion constructor 
+  template <class _Up> 
+  simd_mask(const simd_mask<_Up, simd_abi::fixed_size<size()>>&) noexcept; 
+ 
+  // load constructor 
+  template <class _Flags> 
+  simd_mask(const value_type*, _Flags); 
+ 
+  // loads [simd.mask.copy] 
+  template <class _Flags> 
+  void copy_from(const value_type*, _Flags); 
+  template <class _Flags> 
+  void copy_to(value_type*, _Flags) const; 
+ 
+  // scalar access [simd.mask.subscr] 
+  reference operator[](size_t); 
+  value_type operator[](size_t) const; 
+ 
+  // unary operators [simd.mask.unary] 
+  simd_mask operator!() const noexcept; 
+ 
+  // simd_mask binary operators [simd.mask.binary] 
+  friend simd_mask operator&&(const simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask operator||(const simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask operator&(const simd_mask&, const simd_mask&)noexcept; 
+  friend simd_mask operator|(const simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask operator^(const simd_mask&, const simd_mask&) noexcept; 
+ 
+  // simd_mask compound assignment [simd.mask.cassign] 
+  friend simd_mask& operator&=(simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask& operator|=(simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask& operator^=(simd_mask&, const simd_mask&) noexcept; 
+ 
+  // simd_mask compares [simd.mask.comparison] 
+  friend simd_mask operator==(const simd_mask&, const simd_mask&) noexcept; 
+  friend simd_mask operator!=(const simd_mask&, const simd_mask&) noexcept; 
+}; 
+ 
 #endif // _LIBCPP_STD_VER >= 17
 
-_LIBCPP_END_NAMESPACE_EXPERIMENTAL_SIMD
-
+_LIBCPP_END_NAMESPACE_EXPERIMENTAL_SIMD 
+ 
 _LIBCPP_POP_MACROS
 
-#endif /* _LIBCPP_EXPERIMENTAL_SIMD */
+#endif /* _LIBCPP_EXPERIMENTAL_SIMD */