[libcxx] implement <simd> ABI for Clang/GCC vector extension, constructors, copy_from and copy_to.

Summary:
This patch adds a new macro _LIBCPP_HAS_NO_VECTOR_EXTENSION for detecting
whether a vector extension (\_\_attribute\_\_((vector_size(num_bytes)))) is
available.

On the top of that, this patch implements the following API:
* all constructors
* operator[]
* copy_from
* copy_to

It also defines simd_abi::native to use vector extension, if available.
In GCC and Clang, certain values with vector extension are passed by registers,
instead of memory.

Based on D41148.

Reviewers: mclow.lists, EricWF

Subscribers: cfe-commits, MaskRay, lichray, sanjoy

Differential Revision: https://reviews.llvm.org/D41376

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@338309 91177308-0d34-0410-b5e6-96231b3b80d8

18 files changed, 1477 insertions, 445 deletions

diff --git a/include/__config b/include/__config
index c01ac12be..bba7f53ba 100644
--- a/include/__config
+++ b/include/__config
@@ -620,6 +620,8 @@ namespace std {
 
 #define _LIBCPP_ALWAYS_INLINE __forceinline
 
+#define _LIBCPP_HAS_NO_VECTOR_EXTENSION
+
 #elif defined(_LIBCPP_COMPILER_IBM)
 
 #define _ALIGNAS(x) __attribute__((__aligned__(x)))
@@ -652,6 +654,8 @@ namespace std {
 
 #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
 
+#define _LIBCPP_HAS_NO_VECTOR_EXTENSION
+
 #endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM]
 
 #if _LIBCPP_STD_VER >= 17
diff --git a/include/experimental/__config b/include/experimental/__config
index 55ae31b8a..c6f177620 100644
--- a/include/experimental/__config
+++ b/include/experimental/__config
@@ -64,4 +64,11 @@
 #define _LIBCPP_END_NAMESPACE_EXPERIMENTAL_SIMD_ABI \
     } _LIBCPP_END_NAMESPACE_EXPERIMENTAL_SIMD
 
+// TODO: support more targets
+#if defined(__AVX__)
+#define _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES 32
+#else
+#define _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES 16
+#endif
+
 #endif
diff --git a/include/experimental/simd b/include/experimental/simd
index 4876ccb82..2cc0d8deb 100644
--- a/include/experimental/simd
+++ b/include/experimental/simd
@@ -651,6 +651,7 @@ public:
 */
 
 #include <experimental/__config>
+#include <algorithm>
 #include <array>
 #include <cstddef>
 #include <functional>
@@ -664,23 +665,241 @@ _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_SIMD
 enum class _StorageKind {
   _Scalar,
   _Array,
+  _VecExt,
 };
 
 template <_StorageKind __kind, int _Np>
 struct __simd_abi {};
 
 template <class _Tp, class _Abi>
-struct __simd_storage_traits {};
+class __simd_storage {};
 
 template <class _Tp, int __num_element>
-struct __simd_storage_traits<_Tp,
-                             __simd_abi<_StorageKind::_Array, __num_element>> {
-  using type = std::array<_Tp, __num_element>;
+class __simd_storage<_Tp, __simd_abi<_StorageKind::_Array, __num_element>> {
+  std::array<_Tp, __num_element> __storage_;
+
+  template <class, class>
+  friend struct simd;
+
+  template <class, class>
+  friend struct simd_mask;
+
+public:
+  _Tp __get(size_t __index) const noexcept { return __storage_[__index]; };
+  void __set(size_t __index, _Tp __val) noexcept {
+    __storage_[__index] = __val;
+  }
 };
 
 template <class _Tp>
-struct __simd_storage_traits<_Tp, __simd_abi<_StorageKind::_Scalar, 1>> {
-  using type = _Tp;
+class __simd_storage<_Tp, __simd_abi<_StorageKind::_Scalar, 1>> {
+  _Tp __storage_;
+
+  template <class, class>
+  friend struct simd;
+
+  template <class, class>
+  friend struct simd_mask;
+
+public:
+  _Tp __get(size_t __index) const noexcept { return (&__storage_)[__index]; };
+  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) {
+  return ((__val - 1) & __val) == 0 ? __val
+                                    : __floor_pow_of_2((__val - 1) & __val);
+}
+
+constexpr size_t __ceil_pow_of_2(size_t __val) {
+  return __val == 1 ? 1 : __floor_pow_of_2(__val - 1) << 1;
+}
+
+template <class _Tp, size_t __bytes>
+struct __vec_ext_traits {
+#if !defined(_LIBCPP_COMPILER_CLANG)
+  typedef _Tp type __attribute__((vector_size(__ceil_pow_of_2(__bytes))));
+#endif
+};
+
+#if defined(_LIBCPP_COMPILER_CLANG)
+#define _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, _NUM_ELEMENT)                        \
+  template <>                                                                  \
+  struct __vec_ext_traits<_TYPE, sizeof(_TYPE) * _NUM_ELEMENT> {               \
+    using type =                                                               \
+        _TYPE __attribute__((vector_size(sizeof(_TYPE) * _NUM_ELEMENT)));      \
+  }
+
+#define _LIBCPP_SPECIALIZE_VEC_EXT_32(_TYPE)                                   \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 1);                                        \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 2);                                        \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 3);                                        \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 4);                                        \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 5);                                        \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 6);                                        \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 7);                                        \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 8);                                        \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 9);                                        \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 10);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 11);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 12);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 13);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 14);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 15);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 16);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 17);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 18);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 19);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 20);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 21);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 22);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 23);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 24);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 25);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 26);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 27);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 28);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 29);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 30);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 31);                                       \
+  _LIBCPP_SPECIALIZE_VEC_EXT(_TYPE, 32);
+
+_LIBCPP_SPECIALIZE_VEC_EXT_32(char);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(char16_t);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(char32_t);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(wchar_t);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(signed char);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(signed short);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(signed int);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(signed long);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(signed long long);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(unsigned char);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(unsigned short);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(unsigned int);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(unsigned long);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(unsigned long long);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(float);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(double);
+_LIBCPP_SPECIALIZE_VEC_EXT_32(long double);
+
+#undef _LIBCPP_SPECIALIZE_VEC_EXT_32
+#undef _LIBCPP_SPECIALIZE_VEC_EXT
+#endif
+
+template <class _Tp, int __num_element>
+class __simd_storage<_Tp, __simd_abi<_StorageKind::_VecExt, __num_element>> {
+  using _StorageType =
+      typename __vec_ext_traits<_Tp, sizeof(_Tp) * __num_element>::type;
+
+  _StorageType __storage_;
+
+  template <class, class>
+  friend struct simd;
+
+  template <class, class>
+  friend struct simd_mask;
+
+public:
+  _Tp __get(size_t __index) const noexcept { return __storage_[__index]; };
+  void __set(size_t __index, _Tp __val) noexcept {
+    __storage_[__index] = __val;
+  }
+};
+
+#endif // _LIBCPP_HAS_NO_VECTOR_EXTENSION
+
+template <class _Vp, class _Tp, class _Abi>
+class __simd_reference {
+  static_assert(std::is_same<_Vp, _Tp>::value, "");
+
+  template <class, class>
+  friend struct simd;
+
+  template <class, class>
+  friend struct simd_mask;
+
+  __simd_storage<_Tp, _Abi>* __ptr_;
+  size_t __index_;
+
+  __simd_reference(__simd_storage<_Tp, _Abi>* __ptr, size_t __index)
+      : __ptr_(__ptr), __index_(__index) {}
+
+  __simd_reference(const __simd_reference&) = default;
+
+public:
+  __simd_reference() = delete;
+  __simd_reference& operator=(const __simd_reference&) = delete;
+
+  operator _Vp() const { return __ptr_->__get(__index_); }
+
+  __simd_reference operator=(_Vp __value) && {
+    __ptr_->__set(__index_, __value);
+    return *this;
+  }
+
+  __simd_reference operator++() && {
+    return std::move(*this) = __ptr_->__get(__index_) + 1;
+  }
+
+  _Vp operator++(int) && {
+    auto __val = __ptr_->__get(__index_);
+    __ptr_->__set(__index_, __val + 1);
+    return __val;
+  }
+
+  __simd_reference operator--() && {
+    return std::move(*this) = __ptr_->__get(__index_) - 1;
+  }
+
+  _Vp operator--(int) && {
+    auto __val = __ptr_->__get(__index_);
+    __ptr_->__set(__index_, __val - 1);
+    return __val;
+  }
+
+  __simd_reference operator+=(_Vp __value) && {
+    return std::move(*this) = __ptr_->__get(__index_) + __value;
+  }
+
+  __simd_reference operator-=(_Vp __value) && {
+    return std::move(*this) = __ptr_->__get(__index_) - __value;
+  }
+
+  __simd_reference operator*=(_Vp __value) && {
+    return std::move(*this) = __ptr_->__get(__index_) * __value;
+  }
+
+  __simd_reference operator/=(_Vp __value) && {
+    return std::move(*this) = __ptr_->__get(__index_) / __value;
+  }
+
+  __simd_reference operator%=(_Vp __value) && {
+    return std::move(*this) = __ptr_->__get(__index_) % __value;
+  }
+
+  __simd_reference operator>>=(_Vp __value) && {
+    return std::move(*this) = __ptr_->__get(__index_) >> __value;
+  }
+
+  __simd_reference operator<<=(_Vp __value) && {
+    return std::move(*this) = __ptr_->__get(__index_) << __value;
+  }
+
+  __simd_reference operator&=(_Vp __value) && {
+    return std::move(*this) = __ptr_->__get(__index_) & __value;
+  }
+
+  __simd_reference operator|=(_Vp __value) && {
+    return std::move(*this) = __ptr_->__get(__index_) | __value;
+  }
+
+  __simd_reference operator^=(_Vp __value) && {
+    return std::move(*this) = __ptr_->__get(__index_) ^ __value;
+  }
 };
 
 template <class _To, class _From>
@@ -720,6 +939,17 @@ 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;
+};
+
+template <class _Tp>
+constexpr bool __vectorizable() {
+  return std::is_arithmetic<_Tp>::value && !std::is_const<_Tp>::value &&
+         !std::is_volatile<_Tp>::value && !std::is_same<_Tp, bool>::value;
+}
+
 _LIBCPP_END_NAMESPACE_EXPERIMENTAL_SIMD
 _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_SIMD_ABI
 
@@ -728,14 +958,21 @@ using scalar = __simd_abi<_StorageKind::_Scalar, 1>;
 template <int _Np>
 using fixed_size = __simd_abi<_StorageKind::_Array, _Np>;
 
-#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
 template <class _Tp>
-_LIBCPP_INLINE_VAR constexpr int max_fixed_size = 32;
-#endif
+_LIBCPP_INLINE_VAR constexpr size_t max_fixed_size = 32;
+
 template <class _Tp>
 using compatible = fixed_size<16 / sizeof(_Tp)>;
+
+#ifndef _LIBCPP_HAS_NO_VECTOR_EXTENSION
+template <class _Tp>
+using native = __simd_abi<_StorageKind::_VecExt,
+                          _LIBCPP_NATIVE_SIMD_WIDTH_IN_BYTES / sizeof(_Tp)>;
+#else
 template <class _Tp>
-using native = compatible<_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
@@ -749,14 +986,10 @@ struct element_aligned_tag {};
 struct vector_aligned_tag {};
 template <size_t>
 struct overaligned_tag {};
-#if _LIBCPP_STD_VER > 14
 _LIBCPP_INLINE_VAR constexpr element_aligned_tag element_aligned{};
 _LIBCPP_INLINE_VAR constexpr vector_aligned_tag vector_aligned{};
-#if !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
 template <size_t _Np>
 _LIBCPP_INLINE_VAR constexpr overaligned_tag<_Np> overaligned{};
-#endif
-#endif
 
 // traits [simd.traits]
 template <class _Tp>
@@ -794,7 +1027,6 @@ template <size_t _Align>
 struct is_simd_flag_type<overaligned_tag<_Align>>
     : std::integral_constant<bool, true> {};
 
-#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
 template <class _Tp>
 _LIBCPP_INLINE_VAR constexpr bool is_abi_tag_v = is_abi_tag<_Tp>::value;
 template <class _Tp>
@@ -804,7 +1036,6 @@ _LIBCPP_INLINE_VAR constexpr bool is_simd_mask_v = is_simd_mask<_Tp>::value;
 template <class _Tp>
 _LIBCPP_INLINE_VAR constexpr bool is_simd_flag_type_v =
     is_simd_flag_type<_Tp>::value;
-#endif
 template <class _Tp, size_t _Np>
 struct abi_for_size {
   using type = simd_abi::fixed_size<_Np>;
@@ -824,17 +1055,16 @@ struct simd_size<_Tp, __simd_abi<__kind, _Np>>
       "Element type should be vectorizable");
 };
 
+// TODO: implement it.
 template <class _Tp, class _Up = typename _Tp::value_type>
 struct memory_alignment;
 
-#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
 template <class _Tp, class _Abi = simd_abi::compatible<_Tp>>
 _LIBCPP_INLINE_VAR constexpr size_t simd_size_v = simd_size<_Tp, _Abi>::value;
 
 template <class _Tp, class _Up = typename _Tp::value_type>
 _LIBCPP_INLINE_VAR constexpr size_t memory_alignment_v =
     memory_alignment<_Tp, _Up>::value;
-#endif
 
 // class template simd [simd.class]
 template <class _Tp>
@@ -972,11 +1202,6 @@ template <class _MaskType, class _Tp>
 class where_expression;
 
 // masked assignment [simd.mask.where]
-template <class _Tp>
-struct __nodeduce {
-  using type = _Tp;
-};
-
 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;
@@ -1113,7 +1338,23 @@ public:
 // TODO: implement simd
 template <class _Tp, class _Abi>
 class simd {
+public:
+  using value_type = _Tp;
+  using reference = __simd_reference<_Tp, _Tp, _Abi>;
+  using mask_type = simd_mask<_Tp, _Abi>;
+  using abi_type = _Abi;
+
+  simd() = default;
+  simd(const simd&) = default;
+  simd& operator=(const simd&) = default;
+
+  static constexpr size_t size() noexcept {
+    return simd_size<_Tp, _Abi>::value;
+  }
+
 private:
+  __simd_storage<_Tp, _Abi> __s_;
+
   template <class _Up>
   static constexpr bool __can_broadcast() {
     return (std::is_arithmetic<_Up>::value &&
@@ -1126,57 +1367,97 @@ private:
             std::is_unsigned<_Tp>::value);
   }
 
-public:
-  using value_type = _Tp;
-  // TODO: this is strawman implementation. Turn it into a proxy type.
-  using reference = _Tp&;
-  using mask_type = simd_mask<_Tp, _Abi>;
-
-  using abi_type = _Abi;
+  template <class _Generator, size_t... __indicies>
+  static constexpr decltype(
+      std::forward_as_tuple(std::declval<_Generator>()(
+          std::integral_constant<size_t, __indicies>())...),
+      bool())
+  __can_generate(std::index_sequence<__indicies...>) {
+    return !__variadic_sum<bool>(
+        !__can_broadcast<decltype(std::declval<_Generator>()(
+            std::integral_constant<size_t, __indicies>()))>()...);
+  }
 
-  static constexpr size_t size() noexcept {
-    return simd_size<_Tp, _Abi>::value;
+  template <class _Generator>
+  static bool __can_generate(...) {
+    return false;
   }
 
-  simd() = default;
+  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>
-  simd(const simd<_Up, simd_abi::fixed_size<size()>>&) {}
+  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>
-  simd(_Up&&);
+  simd(_Up&& __rv) {
+    auto __v = static_cast<_Tp>(__rv);
+    for (size_t __i = 0; __i < size(); __i++) {
+      (*this)[__i] = __v;
+    }
+  }
 
   // generator constructor
-  // TODO: for now only check for the index 0. This is because C++11 doesn't
-  // have index_sequence, and it's hard to check for all indicies without using
-  // index_sequence.
   template <class _Generator,
-            int = decltype(simd(std::declval<_Generator>()(
-                               std::integral_constant<size_t, 0>())),
-                           int())()>
-  explicit simd(_Generator&&);
+            int = typename std::enable_if<
+                __can_generate<_Generator>(std::make_index_sequence<size()>()),
+                int>::type()>
+  explicit simd(_Generator&& __g) {
+    __generator_init(std::forward<_Generator>(__g),
+                     std::make_index_sequence<size()>());
+  }
 
   // load constructor
-  template <class _Up, class _Flags>
-  simd(const _Up*, _Flags);
+  template <
+      class _Up, class _Flags,
+      class = typename std::enable_if<__vectorizable<_Up>()>::type,
+      class = typename std::enable_if<is_simd_flag_type<_Flags>::value>::type>
+  simd(const _Up* __buffer, _Flags) {
+    // TODO: optimize for overaligned flags
+    for (size_t __i = 0; __i < size(); __i++) {
+      (*this)[__i] = static_cast<_Tp>(__buffer[__i]);
+    }
+  }
 
   // loads [simd.load]
   template <class _Up, class _Flags>
-  void copy_from(const _Up*, _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>
-  void copy_to(_Up*, _Flags) const;
+  typename std::enable_if<__vectorizable<_Up>() &&
+                          is_simd_flag_type<_Flags>::value>::type
+  copy_to(_Up* __buffer, _Flags) const {
+    // TODO: optimize for overaligned flags
+    for (size_t __i = 0; __i < size(); __i++) {
+      __buffer[__i] = static_cast<_Up>((*this)[__i]);
+    }
+  }
 
   // scalar access [simd.subscr]
-  reference operator[](size_t);
-  value_type operator[](size_t) const;
+  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++();
diff --git a/test/std/experimental/simd/simd.abi/vector_extension.pass.cpp b/test/std/experimental/simd/simd.abi/vector_extension.pass.cpp
new file mode 100644
index 000000000..dd8436618
--- /dev/null
+++ b/test/std/experimental/simd/simd.abi/vector_extension.pass.cpp
@@ -0,0 +1,67 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
+// <experimental/simd>
+//
+// [simd.abi]
+
+#include <experimental/simd>
+#include <cstdint>
+
+namespace ex = std::experimental::parallelism_v2;
+
+constexpr inline int reg_width() {
+#if defined(__AVX__)
+  return 32;
+#else
+  return 16;
+#endif
+}
+
+#ifndef _LIBCPP_HAS_NO_VECTOR_EXTENSION
+
+static_assert(
+    sizeof(ex::simd<char, ex::__simd_abi<ex::_StorageKind::_VecExt, 1>>) == 1,
+    "");
+static_assert(
+    sizeof(ex::simd<char, ex::__simd_abi<ex::_StorageKind::_VecExt, 2>>) == 2,
+    "");
+static_assert(
+    sizeof(ex::simd<char, ex::__simd_abi<ex::_StorageKind::_VecExt, 3>>) == 4,
+    "");
+static_assert(
+    sizeof(ex::simd<char, ex::__simd_abi<ex::_StorageKind::_VecExt, 12>>) == 16,
+    "");
+static_assert(
+    sizeof(ex::simd<int32_t, ex::__simd_abi<ex::_StorageKind::_VecExt, 3>>) ==
+        16,
+    "");
+static_assert(
+    sizeof(ex::simd<int32_t, ex::__simd_abi<ex::_StorageKind::_VecExt, 5>>) ==
+        32,
+    "");
+static_assert(
+    std::is_same<ex::simd_abi::native<int8_t>,
+                 ex::__simd_abi<ex::_StorageKind::_VecExt, reg_width()>>::value,
+    "");
+#else
+static_assert(
+    std::is_same<ex::simd_abi::native<int8_t>,
+                 ex::__simd_abi<ex::_StorageKind::_Array, reg_width()>>::value,
+    "");
+
+#endif
+
+static_assert(std::is_same<ex::simd_abi::compatible<int8_t>,
+                           ex::__simd_abi<ex::_StorageKind::_Array, 16>>::value,
+              "");
+
+int main() {}
diff --git a/test/std/experimental/simd/simd.access/default.pass.cpp b/test/std/experimental/simd/simd.access/default.pass.cpp
new file mode 100644
index 000000000..697035b66
--- /dev/null
+++ b/test/std/experimental/simd/simd.access/default.pass.cpp
@@ -0,0 +1,217 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
+// <experimental/simd>
+//
+// scalar access [simd.subscr]
+// reference operator[](size_t);
+// value_type operator[](size_t) const;
+
+#include <experimental/simd>
+#include <cassert>
+#include <cstdint>
+
+namespace ex = std::experimental::parallelism_v2;
+
+template <typename SimdType>
+void test_access() {
+  {
+    SimdType a(42), b(4);
+    static_assert(std::is_convertible<decltype(a[0]), int8_t>::value, "");
+
+    assert(a[0] == 42);
+    assert(!a[0] == !42);
+    assert(~a[0] == ~42);
+    assert(+a[0] == +42);
+    assert(-a[0] == -42);
+    assert(a[0] + b[0] == 42 + 4);
+    assert(a[0] - b[0] == 42 - 4);
+    assert(a[0] * b[0] == 42 * 4);
+    assert(a[0] / b[0] == 42 / 4);
+    assert(a[0] % b[0] == 42 % 4);
+    assert(a[0] << b[0] == (42 << 4));
+    assert(a[0] >> b[0] == (42 >> 4));
+    assert(a[0] < b[0] == false);
+    assert(a[0] <= b[0] == false);
+    assert(a[0] > b[0] == true);
+    assert(a[0] >= b[0] == true);
+    assert(a[0] == b[0] == false);
+    assert(a[0] != b[0] == true);
+    assert((a[0] & b[0]) == (42 & 4));
+    assert((a[0] | b[0]) == (42 | 4));
+    assert((a[0] ^ b[0]) == (42 ^ 4));
+    assert((a[0] && b[0]) == true);
+    assert((a[0] || b[0]) == true);
+
+    {
+      auto c = a;
+      ++c[0];
+      assert(c[0] == 42 + 1);
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      auto ret = c[0]++;
+      assert(ret == 42);
+      assert(c[0] == 42 + 1);
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      --c[0];
+      assert(c[0] == 42 - 1);
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      auto ret = c[0]--;
+      assert(ret == 42);
+      assert(c[0] == 42 - 1);
+      assert(c[1] == 42);
+    }
+
+    {
+      auto c = a;
+      c[0] += b[0];
+      assert(c[0] == 42 + 4);
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      c[0] -= b[0];
+      assert(c[0] == 42 - 4);
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      c[0] *= b[0];
+      assert(c[0] == 42 * 4);
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      c[0] /= b[0];
+      assert(c[0] == 42 / 4);
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      c[0] %= b[0];
+      assert(c[0] == 42 % 4);
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      c[0] >>= b[0];
+      assert(c[0] == (42 >> 4));
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      c[0] <<= b[0];
+      assert(c[0] == (42 << 4));
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      c[0] &= b[0];
+      assert(c[0] == (42 & 4));
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      c[0] |= b[0];
+      assert(c[0] == (42 | 4));
+      assert(c[1] == 42);
+    }
+    {
+      auto c = a;
+      c[0] ^= b[0];
+      assert(c[0] == (42 ^ 4));
+      assert(c[1] == 42);
+    }
+
+    {
+      auto c = a;
+      (void)(a[0] + (c[0] += a[0]));
+    }
+    {
+      auto c = a;
+      (void)(a[0] + (c[0] -= a[0]));
+    }
+    {
+      auto c = a;
+      (void)(a[0] + (c[0] *= a[0]));
+    }
+    {
+      auto c = a;
+      (void)(a[0] + (c[0] /= a[0]));
+    }
+    {
+      auto c = a;
+      (void)(a[0] + (c[0] %= a[0]));
+    }
+    {
+      auto c = a;
+      (void)(a[0] + (c[0] >>= a[0]));
+    }
+    {
+      auto c = a;
+      (void)(a[0] + (c[0] <<= a[0]));
+    }
+    {
+      auto c = a;
+      (void)(a[0] + (c[0] &= a[0]));
+    }
+    {
+      auto c = a;
+      (void)(a[0] + (c[0] |= a[0]));
+    }
+    {
+      auto c = a;
+      (void)(a[0] + (c[0] ^= a[0]));
+    }
+  }
+  {
+    const SimdType a(42);
+    const SimdType b(4);
+    static_assert(std::is_same<decltype(a[0]), int>::value, "");
+
+    assert(a[0] == 42);
+    assert(!a[0] == !42);
+    assert(~a[0] == ~42);
+    assert(+a[0] == +42);
+    assert(-a[0] == -42);
+    assert(a[0] + b[0] == 42 + 4);
+    assert(a[0] - b[0] == 42 - 4);
+    assert(a[0] * b[0] == 42 * 4);
+    assert(a[0] / b[0] == 42 / 4);
+    assert(a[0] % b[0] == 42 % 4);
+    assert(a[0] << b[0] == (42 << 4));
+    assert(a[0] >> b[0] == (42 >> 4));
+    assert(a[0] < b[0] == false);
+    assert(a[0] <= b[0] == false);
+    assert(a[0] > b[0] == true);
+    assert(a[0] >= b[0] == true);
+    assert(a[0] == b[0] == false);
+    assert(a[0] != b[0] == true);
+    assert((a[0] & b[0]) == (42 & 4));
+    assert((a[0] | b[0]) == (42 | 4));
+    assert((a[0] ^ b[0]) == (42 ^ 4));
+    assert((a[0] && b[0]) == true);
+    assert((a[0] || b[0]) == true);
+  }
+}
+
+int main() {
+  test_access<ex::native_simd<int>>();
+  test_access<ex::fixed_size_simd<int, 4>>();
+}
diff --git a/test/std/experimental/simd/simd.casts/simd_cast.pass.cpp b/test/std/experimental/simd/simd.casts/simd_cast.pass.cpp
index af6b13fe8..d15f138d5 100644
--- a/test/std/experimental/simd/simd.casts/simd_cast.pass.cpp
+++ b/test/std/experimental/simd/simd.casts/simd_cast.pass.cpp
@@ -7,34 +7,40 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++98, c++03
+// UNSUPPORTED: c++98, c++03, c++11, c++14
 
 // <experimental/simd>
 //
 // [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 ex::simd_cast<(const
+// ex::simd<U, Abi>&);
+
 #include <experimental/simd>
 #include <cstdint>
 
-using namespace std::experimental::parallelism_v2;
-
-static_assert(std::is_same<decltype(simd_cast<int32_t>(native_simd<int32_t>())),
-                           native_simd<int32_t>>::value,
-              "");
+namespace ex = std::experimental::parallelism_v2;
 
 static_assert(
-    std::is_same<decltype(simd_cast<int64_t>(fixed_size_simd<int32_t, 4>())),
-                 fixed_size_simd<int64_t, 4>>::value,
+    std::is_same<decltype(ex::simd_cast<int32_t>(ex::native_simd<int32_t>())),
+                 ex::native_simd<int32_t>>::value,
     "");
 
-static_assert(std::is_same<decltype(simd_cast<fixed_size_simd<int64_t, 1>>(
-                               simd<int32_t, simd_abi::scalar>())),
-                           fixed_size_simd<int64_t, 1>>::value,
+static_assert(std::is_same<decltype(ex::simd_cast<int64_t>(
+                               ex::fixed_size_simd<int32_t, 4>())),
+                           ex::fixed_size_simd<int64_t, 4>>::value,
               "");
 
-static_assert(std::is_same<decltype(simd_cast<simd<int64_t, simd_abi::scalar>>(
-                               fixed_size_simd<int32_t, 1>())),
-                           simd<int64_t, simd_abi::scalar>>::value,
-              "");
+static_assert(
+    std::is_same<decltype(ex::simd_cast<ex::fixed_size_simd<int64_t, 1>>(
+                     ex::simd<int32_t, ex::simd_abi::scalar>())),
+                 ex::fixed_size_simd<int64_t, 1>>::value,
+    "");
+
+static_assert(
+    std::is_same<
+        decltype(ex::simd_cast<ex::simd<int64_t, ex::simd_abi::scalar>>(
+            ex::fixed_size_simd<int32_t, 1>())),
+        ex::simd<int64_t, ex::simd_abi::scalar>>::value,
+    "");
 
 int main() {}
diff --git a/test/std/experimental/simd/simd.casts/static_simd_cast.pass.cpp b/test/std/experimental/simd/simd.casts/static_simd_cast.pass.cpp
index eb1fa55e0..b73466477 100644
--- a/test/std/experimental/simd/simd.casts/static_simd_cast.pass.cpp
+++ b/test/std/experimental/simd/simd.casts/static_simd_cast.pass.cpp
@@ -7,32 +7,35 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++98, c++03
+// UNSUPPORTED: c++98, c++03, c++11, c++14
 
 // <experimental/simd>
 //
 // [simd.casts]
-// template <class T, class U, class Abi> see below static_simd_cast(const simd<U, Abi>&);
+// template <class T, class U, class Abi> see below ex::static_simd_cast<(const
+// ex::simd<U, Abi>&);
 
 #include <experimental/simd>
 #include <cstdint>
 
-using namespace std::experimental::parallelism_v2;
+namespace ex = std::experimental::parallelism_v2;
 
 static_assert(
-    std::is_same<decltype(static_simd_cast<float>(native_simd<int>())),
-                 native_simd<float>>::value,
+    std::is_same<decltype(ex::static_simd_cast<float>(ex::native_simd<int>())),
+                 ex::native_simd<float>>::value,
     "");
 
-static_assert(std::is_same<decltype(static_simd_cast<fixed_size_simd<float, 1>>(
-                               simd<int, simd_abi::scalar>())),
-                           fixed_size_simd<float, 1>>::value,
-              "");
+static_assert(
+    std::is_same<decltype(ex::static_simd_cast<ex::fixed_size_simd<float, 1>>(
+                     ex::simd<int, ex::simd_abi::scalar>())),
+                 ex::fixed_size_simd<float, 1>>::value,
+    "");
 
 static_assert(
-    std::is_same<decltype(static_simd_cast<simd<float, simd_abi::scalar>>(
-                     fixed_size_simd<int, 1>())),
-                 simd<float, simd_abi::scalar>>::value,
+    std::is_same<
+        decltype(ex::static_simd_cast<ex::simd<float, ex::simd_abi::scalar>>(
+            ex::fixed_size_simd<int, 1>())),
+        ex::simd<float, ex::simd_abi::scalar>>::value,
     "");
 
 int main() {}
diff --git a/test/std/experimental/simd/simd.cons/broadcast.pass.cpp b/test/std/experimental/simd/simd.cons/broadcast.pass.cpp
index 60230cc63..49b2b5572 100644
--- a/test/std/experimental/simd/simd.cons/broadcast.pass.cpp
+++ b/test/std/experimental/simd/simd.cons/broadcast.pass.cpp
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++98, c++03
+// UNSUPPORTED: c++98, c++03, c++11, c++14
 
 // See GCC PR63723.
 // UNSUPPORTED: gcc-4.9
@@ -20,18 +20,19 @@
 #include <cstdint>
 #include <experimental/simd>
 
-using namespace std::experimental::parallelism_v2;
+namespace ex = std::experimental::parallelism_v2;
 
 template <class T, class... Args>
 auto not_supported_native_simd_ctor(Args&&... args)
-    -> decltype(native_simd<T>(std::forward<Args>(args)...), void()) = delete;
+    -> decltype(ex::native_simd<T>(std::forward<Args>(args)...),
+                void()) = delete;
 
 template <class T>
 void not_supported_native_simd_ctor(...) {}
 
 template <class T, class... Args>
 auto supported_native_simd_ctor(Args&&... args)
-    -> decltype(native_simd<T>(std::forward<Args>(args)...), void()) {}
+    -> decltype(ex::native_simd<T>(std::forward<Args>(args)...), void()) {}
 
 template <class T>
 void supported_native_simd_ctor(...) = delete;
@@ -55,4 +56,31 @@ void compile_narrowing_conversion() {
   not_supported_native_simd_ctor<int>(3.);
 }
 
-int main() {}
+void compile_convertible() {
+  struct ConvertibleToInt {
+    operator int64_t() const;
+  };
+  supported_native_simd_ctor<int64_t>(ConvertibleToInt());
+
+  struct NotConvertibleToInt {};
+  not_supported_native_simd_ctor<int64_t>(NotConvertibleToInt());
+}
+
+void compile_unsigned() {
+  not_supported_native_simd_ctor<int>(3u);
+  supported_native_simd_ctor<uint16_t>(3u);
+}
+
+template <typename SimdType>
+void test_broadcast() {
+  SimdType a(3);
+  for (size_t i = 0; i < a.size(); i++) {
+    assert(a[i] == 3);
+  }
+}
+
+int main() {
+  test_broadcast<ex::native_simd<int>>();
+  test_broadcast<ex::fixed_size_simd<int, 4>>();
+  test_broadcast<ex::fixed_size_simd<int, 15>>();
+}
diff --git a/test/std/experimental/simd/simd.cons/default.pass.cpp b/test/std/experimental/simd/simd.cons/default.pass.cpp
new file mode 100644
index 000000000..0f12eced0
--- /dev/null
+++ b/test/std/experimental/simd/simd.cons/default.pass.cpp
@@ -0,0 +1,28 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
+// <experimental/simd>
+//
+// [simd.class]
+// simd() = default;
+
+#include <cstdint>
+#include <experimental/simd>
+
+namespace ex = std::experimental::parallelism_v2;
+
+int main() {
+  static_assert(ex::native_simd<int32_t>().size() > 0, "");
+  static_assert(ex::fixed_size_simd<int32_t, 4>().size() == 4, "");
+  static_assert(ex::fixed_size_simd<int32_t, 5>().size() == 5, "");
+  static_assert(ex::fixed_size_simd<int32_t, 1>().size() == 1, "");
+  static_assert(ex::fixed_size_simd<char, 32>().size() == 32, "");
+}
diff --git a/test/std/experimental/simd/simd.cons/generator.pass.cpp b/test/std/experimental/simd/simd.cons/generator.pass.cpp
index baf7d936c..43273e896 100644
--- a/test/std/experimental/simd/simd.cons/generator.pass.cpp
+++ b/test/std/experimental/simd/simd.cons/generator.pass.cpp
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++98, c++03
+// UNSUPPORTED: c++98, c++03, c++11, c++14
 
 // See GCC PR63723.
 // UNSUPPORTED: gcc-4.9
@@ -17,30 +17,75 @@
 // [simd.class]
 // template <class G> explicit simd(G&& gen);
 
-#include <cstdint>
 #include <experimental/simd>
+#include <cstdint>
 
-using namespace std::experimental::parallelism_v2;
+namespace ex = std::experimental::parallelism_v2;
 
 template <class T, class... Args>
-auto not_supported_native_simd_ctor(Args&&... args)
-    -> decltype(native_simd<T>(std::forward<Args>(args)...), void()) = delete;
+auto not_supported_simd128_ctor(Args&&... args) -> decltype(
+    ex::fixed_size_simd<T, 16 / sizeof(T)>(std::forward<Args>(args)...),
+    void()) = delete;
 
 template <class T>
-void not_supported_native_simd_ctor(...) {}
+void not_supported_simd128_ctor(...) {}
 
 template <class T, class... Args>
-auto supported_native_simd_ctor(Args&&... args)
-    -> decltype(native_simd<T>(std::forward<Args>(args)...), void()) {}
+auto supported_simd128_ctor(Args&&... args) -> decltype(
+    ex::fixed_size_simd<T, 16 / sizeof(T)>(std::forward<Args>(args)...),
+    void()) {}
 
 template <class T>
-void supported_native_simd_ctor(...) = delete;
+void supported_simd128_ctor(...) = delete;
+
+struct identity {
+  template <size_t value>
+  int operator()(std::integral_constant<size_t, value>) const {
+    return value;
+  }
+};
 
 void compile_generator() {
-  supported_native_simd_ctor<int>([](int i) { return i; });
-  not_supported_native_simd_ctor<int>([](int i) { return float(i); });
-  not_supported_native_simd_ctor<int>([](intptr_t i) { return (int*)(i); });
-  not_supported_native_simd_ctor<int>([](int* i) { return i; });
+  supported_simd128_ctor<int>(identity());
+  not_supported_simd128_ctor<int>([](int i) { return float(i); });
+  not_supported_simd128_ctor<int>([](intptr_t i) { return (int*)(i); });
+  not_supported_simd128_ctor<int>([](int* i) { return i; });
 }
 
-int main() {}
+struct limited_identity {
+  template <size_t value>
+  typename std::conditional<value <= 2, int32_t, int64_t>::type
+  operator()(std::integral_constant<size_t, value>) const {
+    return value;
+  }
+};
+
+void compile_limited_identity() {
+  supported_simd128_ctor<int64_t>(limited_identity());
+  not_supported_simd128_ctor<int32_t>(limited_identity());
+}
+
+template <typename SimdType>
+void test_generator() {
+  {
+    SimdType a([](int i) { return i; });
+    assert(a[0] == 0);
+    assert(a[1] == 1);
+    assert(a[2] == 2);
+    assert(a[3] == 3);
+  }
+  {
+    SimdType a([](int i) { return 2 * i - 1; });
+    assert(a[0] == -1);
+    assert(a[1] == 1);
+    assert(a[2] == 3);
+    assert(a[3] == 5);
+  }
+}
+
+int main() {
+  // TODO: adjust the tests when this assertion fails.
+  assert(ex::native_simd<int32_t>::size() >= 4);
+  test_generator<ex::native_simd<int32_t>>();
+  test_generator<ex::fixed_size_simd<int32_t, 4>>();
+}
diff --git a/test/std/experimental/simd/simd.cons/load.pass.cpp b/test/std/experimental/simd/simd.cons/load.pass.cpp
new file mode 100644
index 000000000..8c87fe7a5
--- /dev/null
+++ b/test/std/experimental/simd/simd.cons/load.pass.cpp
@@ -0,0 +1,118 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
+// <experimental/simd>
+//
+// [simd.class]
+// template <class U, class Flags> simd(const U* mem, Flags f);
+
+#include <cstdint>
+#include <experimental/simd>
+
+#include "test_macros.h"
+
+namespace ex = std::experimental::parallelism_v2;
+
+template <class T, class... Args>
+auto not_supported_native_simd_ctor(Args&&... args)
+    -> decltype(ex::native_simd<T>(std::forward<Args>(args)...),
+                void()) = delete;
+
+template <class T>
+void not_supported_native_simd_ctor(...) {}
+
+template <class T, class... Args>
+auto supported_native_simd_ctor(Args&&... args)
+    -> decltype(ex::native_simd<T>(std::forward<Args>(args)...), void()) {}
+
+template <class T>
+void supported_native_simd_ctor(...) = delete;
+
+void compile_load_ctor() {
+  supported_native_simd_ctor<int>((int*)nullptr, ex::element_aligned_tag());
+  supported_native_simd_ctor<uint32_t>((int*)nullptr,
+                                       ex::element_aligned_tag());
+  supported_native_simd_ctor<double>((float*)nullptr,
+                                     ex::element_aligned_tag());
+  supported_native_simd_ctor<uint16_t>((unsigned int*)nullptr,
+                                       ex::element_aligned_tag());
+  supported_native_simd_ctor<uint32_t>((float*)nullptr,
+                                       ex::element_aligned_tag());
+
+  not_supported_native_simd_ctor<int>((int*)nullptr, int());
+}
+
+template <typename SimdType>
+void test_load_ctor() {
+  alignas(32) int32_t buffer[] = {4, 3, 2, 1};
+  {
+    SimdType a(buffer, ex::element_aligned_tag());
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+  {
+    SimdType a(buffer, ex::vector_aligned_tag());
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+  {
+    SimdType a(buffer, ex::overaligned_tag<32>());
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+
+  {
+    SimdType a(buffer, ex::element_aligned);
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+  {
+    SimdType a(buffer, ex::vector_aligned);
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+  {
+    SimdType a(buffer, ex::overaligned<32>);
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+}
+
+template <typename SimdType>
+void test_converting_load_ctor() {
+  float buffer[] = {1., 2., 4., 8.};
+  SimdType a(buffer, ex::element_aligned_tag());
+  assert(a[0] == 1);
+  assert(a[1] == 2);
+  assert(a[2] == 4);
+  assert(a[3] == 8);
+}
+
+int main() {
+  // TODO: adjust the tests when this assertion fails.
+  assert(ex::native_simd<int32_t>::size() >= 4);
+  test_load_ctor<ex::native_simd<int32_t>>();
+  test_load_ctor<ex::fixed_size_simd<int32_t, 4>>();
+  test_converting_load_ctor<ex::native_simd<int32_t>>();
+  test_converting_load_ctor<ex::fixed_size_simd<int32_t, 4>>();
+}
diff --git a/test/std/experimental/simd/simd.mem/load.pass.cpp b/test/std/experimental/simd/simd.mem/load.pass.cpp
new file mode 100644
index 000000000..b1a3a2b1d
--- /dev/null
+++ b/test/std/experimental/simd/simd.mem/load.pass.cpp
@@ -0,0 +1,122 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
+// <experimental/simd>
+//
+// loads [simd.load]
+// template <class U, class Flags> void copy_from(const U* mem, Flags f);
+
+#include <experimental/simd>
+#include <cstdint>
+
+#include "test_macros.h"
+
+namespace ex = std::experimental::parallelism_v2;
+
+template <class T, class... Args>
+auto not_supported_load(Args&&... args) -> decltype(
+    std::declval<ex::native_simd<T>>().copy_from(std::forward<Args>(args)...),
+    void()) = delete;
+
+template <class T>
+void not_supported_load(...) {}
+
+template <class T, class... Args>
+auto supported_load(Args&&... args) -> decltype(
+    std::declval<ex::native_simd<T>>().copy_from(std::forward<Args>(args)...),
+    void()) {}
+
+template <class T>
+void supported_load(...) = delete;
+
+void compile_load() {
+  supported_load<int>((int*)nullptr, ex::element_aligned_tag());
+  supported_load<uint32_t>((int*)nullptr, ex::element_aligned_tag());
+  supported_load<double>((float*)nullptr, ex::element_aligned_tag());
+  supported_load<uint16_t>((unsigned int*)nullptr, ex::element_aligned_tag());
+  supported_load<uint32_t>((float*)nullptr, ex::element_aligned_tag());
+
+  not_supported_load<int>((int*)nullptr, int());
+}
+
+template <typename SimdType>
+void test_load() {
+  alignas(32) int32_t buffer[] = {4, 3, 2, 1};
+  {
+    SimdType a;
+    a.copy_from(buffer, ex::element_aligned_tag());
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+  {
+    SimdType a;
+    a.copy_from(buffer, ex::vector_aligned_tag());
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+  {
+    SimdType a;
+    a.copy_from(buffer, ex::overaligned_tag<32>());
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+
+  {
+    SimdType a;
+    a.copy_from(buffer, ex::element_aligned);
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+  {
+    SimdType a;
+    a.copy_from(buffer, ex::vector_aligned);
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+  {
+    SimdType a;
+    a.copy_from(buffer, ex::overaligned<32>);
+    assert(a[0] == 4);
+    assert(a[1] == 3);
+    assert(a[2] == 2);
+    assert(a[3] == 1);
+  }
+}
+
+template <typename SimdType>
+void test_converting_load() {
+  float buffer[] = {1., 2., 4., 8.};
+  SimdType a;
+  a.copy_from(buffer, ex::element_aligned_tag());
+  assert(a[0] == 1);
+  assert(a[1] == 2);
+  assert(a[2] == 4);
+  assert(a[3] == 8);
+}
+
+int main() {
+  // TODO: adjust the tests when this assertion fails.
+  assert(ex::native_simd<int32_t>::size() >= 4);
+  test_load<ex::native_simd<int32_t>>();
+  test_load<ex::fixed_size_simd<int32_t, 4>>();
+  test_converting_load<ex::native_simd<int32_t>>();
+  test_converting_load<ex::fixed_size_simd<int32_t, 4>>();
+}
diff --git a/test/std/experimental/simd/simd.mem/store.pass.cpp b/test/std/experimental/simd/simd.mem/store.pass.cpp
new file mode 100644
index 000000000..2025a79f2
--- /dev/null
+++ b/test/std/experimental/simd/simd.mem/store.pass.cpp
@@ -0,0 +1,95 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
+// <experimental/simd>
+//
+// // stores [simd.store]
+// template <class U, class Flags> void copy_to(U* mem, Flags f) const;
+
+#include <experimental/simd>
+#include <cstdint>
+
+#include "test_macros.h"
+
+namespace ex = std::experimental::parallelism_v2;
+
+template <typename SimdType>
+void test_store() {
+  SimdType a([](int i) { return 4 - i; });
+  {
+    alignas(32) int32_t buffer[4] = {0};
+    a.copy_to(buffer, ex::element_aligned_tag());
+    assert(buffer[0] == 4);
+    assert(buffer[1] == 3);
+    assert(buffer[2] == 2);
+    assert(buffer[3] == 1);
+  }
+  {
+    alignas(32) int32_t buffer[4] = {0};
+    a.copy_to(buffer, ex::vector_aligned_tag());
+    assert(buffer[0] == 4);
+    assert(buffer[1] == 3);
+    assert(buffer[2] == 2);
+    assert(buffer[3] == 1);
+  }
+  {
+    alignas(32) int32_t buffer[4] = {0};
+    a.copy_to(buffer, ex::overaligned_tag<32>());
+    assert(buffer[0] == 4);
+    assert(buffer[1] == 3);
+    assert(buffer[2] == 2);
+    assert(buffer[3] == 1);
+  }
+
+  {
+    alignas(32) int32_t buffer[4] = {0};
+    a.copy_to(buffer, ex::element_aligned);
+    assert(buffer[0] == 4);
+    assert(buffer[1] == 3);
+    assert(buffer[2] == 2);
+    assert(buffer[3] == 1);
+  }
+  {
+    alignas(32) int32_t buffer[4] = {0};
+    a.copy_to(buffer, ex::vector_aligned);
+    assert(buffer[0] == 4);
+    assert(buffer[1] == 3);
+    assert(buffer[2] == 2);
+    assert(buffer[3] == 1);
+  }
+  {
+    alignas(32) int32_t buffer[4] = {0};
+    a.copy_to(buffer, ex::overaligned<32>);
+    assert(buffer[0] == 4);
+    assert(buffer[1] == 3);
+    assert(buffer[2] == 2);
+    assert(buffer[3] == 1);
+  }
+}
+
+template <typename SimdType>
+void test_converting_store() {
+  float buffer[4] = {0.};
+  SimdType a([](int i) { return 1 << i; });
+  a.copy_to(buffer, ex::element_aligned_tag());
+  assert(buffer[0] == 1.);
+  assert(buffer[1] == 2.);
+  assert(buffer[2] == 4.);
+  assert(buffer[3] == 8.);
+}
+
+int main() {
+  // TODO: adjust the tests when this assertion fails.
+  test_store<ex::native_simd<int32_t>>();
+  test_store<ex::fixed_size_simd<int32_t, 4>>();
+  test_converting_store<ex::native_simd<int32_t>>();
+  test_converting_store<ex::fixed_size_simd<int32_t, 4>>();
+}
diff --git a/test/std/experimental/simd/simd.traits/abi_for_size.pass.cpp b/test/std/experimental/simd/simd.traits/abi_for_size.pass.cpp
index 6e244220d..b3cd92add 100644
--- a/test/std/experimental/simd/simd.traits/abi_for_size.pass.cpp
+++ b/test/std/experimental/simd/simd.traits/abi_for_size.pass.cpp
@@ -7,24 +7,26 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++98, c++03
+// UNSUPPORTED: c++98, c++03, c++11, c++14
 
 // <experimental/simd>
 //
 // [simd.traits]
-// 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, size_t N> struct abi_for_size { using type = see below ;
+// }; template <class T, size_t N> using ex::abi_for_size_t = typename
+// ex::abi_for_size<T, N>::type;
 
 #include <cstdint>
 #include <experimental/simd>
 
-using namespace std::experimental::parallelism_v2;
+namespace ex = std::experimental::parallelism_v2;
 
-static_assert(std::is_same<typename abi_for_size<int, 4>::type,
-                           simd_abi::fixed_size<4>>::value,
+static_assert(std::is_same<typename ex::abi_for_size<int, 4>::type,
+                           ex::simd_abi::fixed_size<4>>::value,
               "");
 
-static_assert(
-    std::is_same<abi_for_size_t<int, 4>, simd_abi::fixed_size<4>>::value, "");
+static_assert(std::is_same<ex::abi_for_size_t<int, 4>,
+                           ex::simd_abi::fixed_size<4>>::value,
+              "");
 
 int main() {}
diff --git a/test/std/experimental/simd/simd.traits/is_abi_tag.pass.cpp b/test/std/experimental/simd/simd.traits/is_abi_tag.pass.cpp
index 4f4f738a8..e87eafbdb 100644
--- a/test/std/experimental/simd/simd.traits/is_abi_tag.pass.cpp
+++ b/test/std/experimental/simd/simd.traits/is_abi_tag.pass.cpp
@@ -7,109 +7,107 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++98, c++03
+// UNSUPPORTED: c++98, c++03, c++11, c++14
 
 // <experimental/simd>
 //
 // [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> inline constexpr bool ex::is_abi_tag_v =
+// ex::is_abi_tag<T>::value;
 
 #include <cstdint>
 #include <experimental/simd>
 #include "test_macros.h"
 
-using namespace std::experimental::parallelism_v2;
+namespace ex = std::experimental::parallelism_v2;
 
 struct UserType {};
 
-static_assert( is_abi_tag<simd_abi::native<int8_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::native<int16_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::native<int32_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::native<int64_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::native<uint8_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::native<uint16_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::native<uint32_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::native<uint64_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::native<float>>::value, "");
-static_assert( is_abi_tag<simd_abi::native<double>>::value, "");
-
-static_assert( is_abi_tag<simd_abi::compatible<int8_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::compatible<int16_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::compatible<int32_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::compatible<int64_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::compatible<uint8_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::compatible<uint16_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::compatible<uint32_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::compatible<uint64_t>>::value, "");
-static_assert( is_abi_tag<simd_abi::compatible<float>>::value, "");
-static_assert( is_abi_tag<simd_abi::compatible<double>>::value, "");
-
-static_assert( is_abi_tag<simd_abi::scalar>::value, "");
-static_assert(!std::is_same<simd_abi::scalar, simd_abi::fixed_size<1>>::value,
-              "");
-
-static_assert( is_abi_tag<simd_abi::fixed_size<1>>::value, "");
-static_assert( is_abi_tag<simd_abi::fixed_size<2>>::value, "");
-static_assert( is_abi_tag<simd_abi::fixed_size<3>>::value, "");
-static_assert( is_abi_tag<simd_abi::fixed_size<4>>::value, "");
-static_assert( is_abi_tag<simd_abi::fixed_size<5>>::value, "");
-static_assert( is_abi_tag<simd_abi::fixed_size<32>>::value, "");
-
-static_assert(!is_abi_tag<void>::value, "");
-static_assert(!is_abi_tag<int>::value, "");
-static_assert(!is_abi_tag<float>::value, "");
-static_assert(!is_abi_tag<UserType>::value, "");
-static_assert(!is_abi_tag<simd<int>>::value, "");
-static_assert(!is_abi_tag<simd<float>>::value, "");
-static_assert(!is_abi_tag<simd_mask<int>>::value, "");
-static_assert(!is_abi_tag<simd_mask<float>>::value, "");
-
-#if TEST_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) &&        \
-    !defined(_LIBCPP_HAS_NO_INLINE_VARIABLES)
-
-static_assert( is_abi_tag_v<simd_abi::native<int8_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::native<int16_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::native<int32_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::native<int64_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::native<uint8_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::native<uint16_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::native<uint32_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::native<uint64_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::native<float>>, "");
-static_assert( is_abi_tag_v<simd_abi::native<double>>, "");
-
-static_assert( is_abi_tag_v<simd_abi::compatible<int8_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::compatible<int16_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::compatible<int32_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::compatible<int64_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::compatible<uint8_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::compatible<uint16_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::compatible<uint32_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::compatible<uint64_t>>, "");
-static_assert( is_abi_tag_v<simd_abi::compatible<float>>, "");
-static_assert( is_abi_tag_v<simd_abi::compatible<double>>, "");
-
-static_assert( is_abi_tag_v<simd_abi::scalar>, "");
-static_assert(!std::is_same<simd_abi::scalar, simd_abi::fixed_size<1>>::value,
-              "");
-
-static_assert( is_abi_tag_v<simd_abi::fixed_size<1>>, "");
-static_assert( is_abi_tag_v<simd_abi::fixed_size<2>>, "");
-static_assert( is_abi_tag_v<simd_abi::fixed_size<3>>, "");
-static_assert( is_abi_tag_v<simd_abi::fixed_size<4>>, "");
-static_assert( is_abi_tag_v<simd_abi::fixed_size<5>>, "");
-static_assert( is_abi_tag_v<simd_abi::fixed_size<32>>, "");
-
-static_assert(!is_abi_tag_v<void>, "");
-static_assert(!is_abi_tag_v<int>, "");
-static_assert(!is_abi_tag_v<float>, "");
-static_assert(!is_abi_tag_v<UserType>, "");
-static_assert(!is_abi_tag_v<simd<int>>, "");
-static_assert(!is_abi_tag_v<simd<float>>, "");
-static_assert(!is_abi_tag_v<simd_mask<int>>, "");
-static_assert(!is_abi_tag_v<simd_mask<float>>, "");
-
-#endif
+static_assert(ex::is_abi_tag<ex::simd_abi::native<int8_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::native<int16_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::native<int32_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::native<int64_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::native<uint8_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::native<uint16_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::native<uint32_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::native<uint64_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::native<float>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::native<double>>::value, "");
+
+static_assert(ex::is_abi_tag<ex::simd_abi::compatible<int8_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::compatible<int16_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::compatible<int32_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::compatible<int64_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::compatible<uint8_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::compatible<uint16_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::compatible<uint32_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::compatible<uint64_t>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::compatible<float>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::compatible<double>>::value, "");
+
+static_assert(ex::is_abi_tag<ex::simd_abi::scalar>::value, "");
+static_assert(
+    !std::is_same<ex::simd_abi::scalar, ex::simd_abi::fixed_size<1>>::value,
+    "");
+
+static_assert(ex::is_abi_tag<ex::simd_abi::fixed_size<1>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::fixed_size<2>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::fixed_size<3>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::fixed_size<4>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::fixed_size<5>>::value, "");
+static_assert(ex::is_abi_tag<ex::simd_abi::fixed_size<32>>::value, "");
+
+static_assert(!ex::is_abi_tag<void>::value, "");
+static_assert(!ex::is_abi_tag<int>::value, "");
+static_assert(!ex::is_abi_tag<float>::value, "");
+static_assert(!ex::is_abi_tag<UserType>::value, "");
+static_assert(!ex::is_abi_tag<ex::simd<int>>::value, "");
+static_assert(!ex::is_abi_tag<ex::simd<float>>::value, "");
+static_assert(!ex::is_abi_tag<ex::simd_mask<int>>::value, "");
+static_assert(!ex::is_abi_tag<ex::simd_mask<float>>::value, "");
+
+static_assert(ex::is_abi_tag_v<ex::simd_abi::native<int8_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::native<int16_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::native<int32_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::native<int64_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::native<uint8_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::native<uint16_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::native<uint32_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::native<uint64_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::native<float>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::native<double>>, "");
+
+static_assert(ex::is_abi_tag_v<ex::simd_abi::compatible<int8_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::compatible<int16_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::compatible<int32_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::compatible<int64_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::compatible<uint8_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::compatible<uint16_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::compatible<uint32_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::compatible<uint64_t>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::compatible<float>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::compatible<double>>, "");
+
+static_assert(ex::is_abi_tag_v<ex::simd_abi::scalar>, "");
+static_assert(
+    !std::is_same<ex::simd_abi::scalar, ex::simd_abi::fixed_size<1>>::value,
+    "");
+
+static_assert(ex::is_abi_tag_v<ex::simd_abi::fixed_size<1>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::fixed_size<2>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::fixed_size<3>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::fixed_size<4>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::fixed_size<5>>, "");
+static_assert(ex::is_abi_tag_v<ex::simd_abi::fixed_size<32>>, "");
+
+static_assert(!ex::is_abi_tag_v<void>, "");
+static_assert(!ex::is_abi_tag_v<int>, "");
+static_assert(!ex::is_abi_tag_v<float>, "");
+static_assert(!ex::is_abi_tag_v<UserType>, "");
+static_assert(!ex::is_abi_tag_v<ex::simd<int>>, "");
+static_assert(!ex::is_abi_tag_v<ex::simd<float>>, "");
+static_assert(!ex::is_abi_tag_v<ex::simd_mask<int>>, "");
+static_assert(!ex::is_abi_tag_v<ex::simd_mask<float>>, "");
 
 int main() {}
diff --git a/test/std/experimental/simd/simd.traits/is_simd.pass.cpp b/test/std/experimental/simd/simd.traits/is_simd.pass.cpp
index 77f5d10ed..8d7c0946c 100644
--- a/test/std/experimental/simd/simd.traits/is_simd.pass.cpp
+++ b/test/std/experimental/simd/simd.traits/is_simd.pass.cpp
@@ -7,127 +7,123 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++98, c++03
+// UNSUPPORTED: c++98, c++03, c++11, c++14
 
 // <experimental/simd>
 //
 // [simd.traits]
-// template <class T> struct is_simd;
-// template <class T> inline constexpr bool is_simd_v = is_simd<T>::value;
+// template <class T> struct ex::is_simd;
+// template <class T> inline constexpr bool ex::is_simd_v =
+// ex::is_simd<T>::value;
 
 #include <cstdint>
 #include <experimental/simd>
 #include "test_macros.h"
 
-using namespace std::experimental::parallelism_v2;
+namespace ex = std::experimental::parallelism_v2;
 
 struct UserType {};
 
-static_assert( is_simd<native_simd<int8_t>>::value, "");
-static_assert( is_simd<native_simd<int16_t>>::value, "");
-static_assert( is_simd<native_simd<int32_t>>::value, "");
-static_assert( is_simd<native_simd<int64_t>>::value, "");
-static_assert( is_simd<native_simd<uint8_t>>::value, "");
-static_assert( is_simd<native_simd<uint16_t>>::value, "");
-static_assert( is_simd<native_simd<uint32_t>>::value, "");
-static_assert( is_simd<native_simd<uint64_t>>::value, "");
-static_assert( is_simd<native_simd<float>>::value, "");
-static_assert( is_simd<native_simd<double>>::value, "");
-
-static_assert( is_simd<fixed_size_simd<int8_t, 1>>::value, "");
-static_assert( is_simd<fixed_size_simd<int16_t, 1>>::value, "");
-static_assert( is_simd<fixed_size_simd<int32_t, 1>>::value, "");
-static_assert( is_simd<fixed_size_simd<int64_t, 1>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint8_t, 1>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint16_t, 1>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint32_t, 1>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint64_t, 1>>::value, "");
-static_assert( is_simd<fixed_size_simd<float, 1>>::value, "");
-static_assert( is_simd<fixed_size_simd<double, 1>>::value, "");
-
-static_assert( is_simd<fixed_size_simd<int8_t, 3>>::value, "");
-static_assert( is_simd<fixed_size_simd<int16_t, 3>>::value, "");
-static_assert( is_simd<fixed_size_simd<int32_t, 3>>::value, "");
-static_assert( is_simd<fixed_size_simd<int64_t, 3>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint8_t, 3>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint16_t, 3>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint32_t, 3>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint64_t, 3>>::value, "");
-static_assert( is_simd<fixed_size_simd<float, 3>>::value, "");
-static_assert( is_simd<fixed_size_simd<double, 3>>::value, "");
-
-static_assert( is_simd<fixed_size_simd<int8_t, 32>>::value, "");
-static_assert( is_simd<fixed_size_simd<int16_t, 32>>::value, "");
-static_assert( is_simd<fixed_size_simd<int32_t, 32>>::value, "");
-static_assert( is_simd<fixed_size_simd<int64_t, 32>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint8_t, 32>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint16_t, 32>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint32_t, 32>>::value, "");
-static_assert( is_simd<fixed_size_simd<uint64_t, 32>>::value, "");
-static_assert( is_simd<fixed_size_simd<float, 32>>::value, "");
-static_assert( is_simd<fixed_size_simd<double, 32>>::value, "");
-
-static_assert(!is_simd<void>::value, "");
-static_assert(!is_simd<int>::value, "");
-static_assert(!is_simd<float>::value, "");
-static_assert(!is_simd<simd_mask<int>>::value, "");
-static_assert(!is_simd<simd_mask<float>>::value, "");
-static_assert(!is_simd<UserType>::value, "");
-
-#if TEST_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) &&        \
-    !defined(_LIBCPP_HAS_NO_INLINE_VARIABLES)
-
-static_assert( is_simd_v<native_simd<int8_t>>, "");
-static_assert( is_simd_v<native_simd<int16_t>>, "");
-static_assert( is_simd_v<native_simd<int32_t>>, "");
-static_assert( is_simd_v<native_simd<int64_t>>, "");
-static_assert( is_simd_v<native_simd<uint8_t>>, "");
-static_assert( is_simd_v<native_simd<uint16_t>>, "");
-static_assert( is_simd_v<native_simd<uint32_t>>, "");
-static_assert( is_simd_v<native_simd<uint64_t>>, "");
-static_assert( is_simd_v<native_simd<float>>, "");
-static_assert( is_simd_v<native_simd<double>>, "");
-
-static_assert( is_simd_v<fixed_size_simd<int8_t, 1>>, "");
-static_assert( is_simd_v<fixed_size_simd<int16_t, 1>>, "");
-static_assert( is_simd_v<fixed_size_simd<int32_t, 1>>, "");
-static_assert( is_simd_v<fixed_size_simd<int64_t, 1>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint8_t, 1>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint16_t, 1>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint32_t, 1>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint64_t, 1>>, "");
-static_assert( is_simd_v<fixed_size_simd<float, 1>>, "");
-static_assert( is_simd_v<fixed_size_simd<double, 1>>, "");
-
-static_assert( is_simd_v<fixed_size_simd<int8_t, 3>>, "");
-static_assert( is_simd_v<fixed_size_simd<int16_t, 3>>, "");
-static_assert( is_simd_v<fixed_size_simd<int32_t, 3>>, "");
-static_assert( is_simd_v<fixed_size_simd<int64_t, 3>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint8_t, 3>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint16_t, 3>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint32_t, 3>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint64_t, 3>>, "");
-static_assert( is_simd_v<fixed_size_simd<float, 3>>, "");
-static_assert( is_simd_v<fixed_size_simd<double, 3>>, "");
-
-static_assert( is_simd_v<fixed_size_simd<int8_t, 32>>, "");
-static_assert( is_simd_v<fixed_size_simd<int16_t, 32>>, "");
-static_assert( is_simd_v<fixed_size_simd<int32_t, 32>>, "");
-static_assert( is_simd_v<fixed_size_simd<int64_t, 32>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint8_t, 32>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint16_t, 32>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint32_t, 32>>, "");
-static_assert( is_simd_v<fixed_size_simd<uint64_t, 32>>, "");
-static_assert( is_simd_v<fixed_size_simd<float, 32>>, "");
-static_assert( is_simd_v<fixed_size_simd<double, 32>>, "");
-
-static_assert(!is_simd_v<void>, "");
-static_assert(!is_simd_v<int>, "");
-static_assert(!is_simd_v<float>, "");
-static_assert(!is_simd_v<simd_mask<int>>, "");
-static_assert(!is_simd_v<simd_mask<float>>, "");
-static_assert(!is_simd_v<UserType>, "");
-
-#endif
+static_assert(ex::is_simd<ex::native_simd<int8_t>>::value, "");
+static_assert(ex::is_simd<ex::native_simd<int16_t>>::value, "");
+static_assert(ex::is_simd<ex::native_simd<int32_t>>::value, "");
+static_assert(ex::is_simd<ex::native_simd<int64_t>>::value, "");
+static_assert(ex::is_simd<ex::native_simd<uint8_t>>::value, "");
+static_assert(ex::is_simd<ex::native_simd<uint16_t>>::value, "");
+static_assert(ex::is_simd<ex::native_simd<uint32_t>>::value, "");
+static_assert(ex::is_simd<ex::native_simd<uint64_t>>::value, "");
+static_assert(ex::is_simd<ex::native_simd<float>>::value, "");
+static_assert(ex::is_simd<ex::native_simd<double>>::value, "");
+
+static_assert(ex::is_simd<ex::fixed_size_simd<int8_t, 1>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<int16_t, 1>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<int32_t, 1>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<int64_t, 1>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint8_t, 1>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint16_t, 1>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint32_t, 1>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint64_t, 1>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<float, 1>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<double, 1>>::value, "");
+
+static_assert(ex::is_simd<ex::fixed_size_simd<int8_t, 3>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<int16_t, 3>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<int32_t, 3>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<int64_t, 3>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint8_t, 3>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint16_t, 3>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint32_t, 3>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint64_t, 3>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<float, 3>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<double, 3>>::value, "");
+
+static_assert(ex::is_simd<ex::fixed_size_simd<int8_t, 32>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<int16_t, 32>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<int32_t, 32>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<int64_t, 32>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint8_t, 32>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint16_t, 32>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint32_t, 32>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<uint64_t, 32>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<float, 32>>::value, "");
+static_assert(ex::is_simd<ex::fixed_size_simd<double, 32>>::value, "");
+
+static_assert(!ex::is_simd<void>::value, "");
+static_assert(!ex::is_simd<int>::value, "");
+static_assert(!ex::is_simd<float>::value, "");
+static_assert(!ex::is_simd<ex::simd_mask<int>>::value, "");
+static_assert(!ex::is_simd<ex::simd_mask<float>>::value, "");
+static_assert(!ex::is_simd<UserType>::value, "");
+
+static_assert(ex::is_simd_v<ex::native_simd<int8_t>>, "");
+static_assert(ex::is_simd_v<ex::native_simd<int16_t>>, "");
+static_assert(ex::is_simd_v<ex::native_simd<int32_t>>, "");
+static_assert(ex::is_simd_v<ex::native_simd<int64_t>>, "");
+static_assert(ex::is_simd_v<ex::native_simd<uint8_t>>, "");
+static_assert(ex::is_simd_v<ex::native_simd<uint16_t>>, "");
+static_assert(ex::is_simd_v<ex::native_simd<uint32_t>>, "");
+static_assert(ex::is_simd_v<ex::native_simd<uint64_t>>, "");
+static_assert(ex::is_simd_v<ex::native_simd<float>>, "");
+static_assert(ex::is_simd_v<ex::native_simd<double>>, "");
+
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int8_t, 1>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int16_t, 1>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int32_t, 1>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int64_t, 1>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint8_t, 1>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint16_t, 1>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint32_t, 1>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint64_t, 1>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<float, 1>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<double, 1>>, "");
+
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int8_t, 3>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int16_t, 3>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int32_t, 3>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int64_t, 3>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint8_t, 3>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint16_t, 3>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint32_t, 3>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint64_t, 3>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<float, 3>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<double, 3>>, "");
+
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int8_t, 32>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int16_t, 32>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int32_t, 32>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<int64_t, 32>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint8_t, 32>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint16_t, 32>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint32_t, 32>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<uint64_t, 32>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<float, 32>>, "");
+static_assert(ex::is_simd_v<ex::fixed_size_simd<double, 32>>, "");
+
+static_assert(!ex::is_simd_v<void>, "");
+static_assert(!ex::is_simd_v<int>, "");
+static_assert(!ex::is_simd_v<float>, "");
+static_assert(!ex::is_simd_v<ex::simd_mask<int>>, "");
+static_assert(!ex::is_simd_v<ex::simd_mask<float>>, "");
+static_assert(!ex::is_simd_v<UserType>, "");
 
 int main() {}
diff --git a/test/std/experimental/simd/simd.traits/is_simd_flag_type.pass.cpp b/test/std/experimental/simd/simd.traits/is_simd_flag_type.pass.cpp
index a6fe40905..ecb68fb62 100644
--- a/test/std/experimental/simd/simd.traits/is_simd_flag_type.pass.cpp
+++ b/test/std/experimental/simd/simd.traits/is_simd_flag_type.pass.cpp
@@ -7,49 +7,45 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++98, c++03
+// UNSUPPORTED: c++98, c++03, c++11, c++14
 
 // <experimental/simd>
 //
 // [simd.traits]
 // 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> inline constexpr bool ex::is_simd_flag_type_v =
+// ex::is_simd_flag_type<T>::value;
 
 #include <cstdint>
 #include <experimental/simd>
 #include "test_macros.h"
 
-using namespace std::experimental::parallelism_v2;
+namespace ex = std::experimental::parallelism_v2;
 
 struct UserType {};
 
-static_assert( is_simd_flag_type<element_aligned_tag>::value, "");
-static_assert( is_simd_flag_type<vector_aligned_tag>::value, "");
-static_assert( is_simd_flag_type<overaligned_tag<16>>::value, "");
-static_assert( is_simd_flag_type<overaligned_tag<32>>::value, "");
-
-static_assert(!is_simd_flag_type<void>::value, "");
-static_assert(!is_simd_flag_type<int>::value, "");
-static_assert(!is_simd_flag_type<float>::value, "");
-static_assert(!is_simd_flag_type<UserType>::value, "");
-static_assert(!is_simd_flag_type<simd<int8_t>>::value, "");
-static_assert(!is_simd_flag_type<simd_mask<int8_t>>::value, "");
-
-#if TEST_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) &&        \
-    !defined(_LIBCPP_HAS_NO_INLINE_VARIABLES)
-
-static_assert( is_simd_flag_type_v<element_aligned_tag>, "");
-static_assert( is_simd_flag_type_v<vector_aligned_tag>, "");
-static_assert( is_simd_flag_type_v<overaligned_tag<16>>, "");
-static_assert( is_simd_flag_type_v<overaligned_tag<32>>, "");
-
-static_assert(!is_simd_flag_type_v<void>, "");
-static_assert(!is_simd_flag_type_v<int>, "");
-static_assert(!is_simd_flag_type_v<float>, "");
-static_assert(!is_simd_flag_type_v<UserType>, "");
-static_assert(!is_simd_flag_type_v<simd<int8_t>>, "");
-static_assert(!is_simd_flag_type_v<simd_mask<int8_t>>, "");
-
-#endif
+static_assert(ex::is_simd_flag_type<ex::element_aligned_tag>::value, "");
+static_assert(ex::is_simd_flag_type<ex::vector_aligned_tag>::value, "");
+static_assert(ex::is_simd_flag_type<ex::overaligned_tag<16>>::value, "");
+static_assert(ex::is_simd_flag_type<ex::overaligned_tag<32>>::value, "");
+
+static_assert(!ex::is_simd_flag_type<void>::value, "");
+static_assert(!ex::is_simd_flag_type<int>::value, "");
+static_assert(!ex::is_simd_flag_type<float>::value, "");
+static_assert(!ex::is_simd_flag_type<UserType>::value, "");
+static_assert(!ex::is_simd_flag_type<ex::simd<int8_t>>::value, "");
+static_assert(!ex::is_simd_flag_type<ex::simd_mask<int8_t>>::value, "");
+
+static_assert(ex::is_simd_flag_type_v<ex::element_aligned_tag>, "");
+static_assert(ex::is_simd_flag_type_v<ex::vector_aligned_tag>, "");
+static_assert(ex::is_simd_flag_type_v<ex::overaligned_tag<16>>, "");
+static_assert(ex::is_simd_flag_type_v<ex::overaligned_tag<32>>, "");
+
+static_assert(!ex::is_simd_flag_type_v<void>, "");
+static_assert(!ex::is_simd_flag_type_v<int>, "");
+static_assert(!ex::is_simd_flag_type_v<float>, "");
+static_assert(!ex::is_simd_flag_type_v<UserType>, "");
+static_assert(!ex::is_simd_flag_type_v<ex::simd<int8_t>>, "");
+static_assert(!ex::is_simd_flag_type_v<ex::simd_mask<int8_t>>, "");
 
 int main() {}
diff --git a/test/std/experimental/simd/simd.traits/is_simd_mask.pass.cpp b/test/std/experimental/simd/simd.traits/is_simd_mask.pass.cpp
index 8c2e0ed5b..736802443 100644
--- a/test/std/experimental/simd/simd.traits/is_simd_mask.pass.cpp
+++ b/test/std/experimental/simd/simd.traits/is_simd_mask.pass.cpp
@@ -7,127 +7,146 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++98, c++03
+// UNSUPPORTED: c++98, c++03, c++11, c++14
 
 // <experimental/simd>
 //
 // [simd.traits]
-// 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 ex::is_simd_mask;
+// template <class T> inline constexpr bool ex::is_simd_mask_v =
+// ex::is_simd_mask<T>::value;
 
 #include <cstdint>
 #include <experimental/simd>
 #include "test_macros.h"
 
-using namespace std::experimental::parallelism_v2;
+namespace ex = std::experimental::parallelism_v2;
 
 struct UserType {};
 
-static_assert( is_simd_mask<native_simd_mask<int8_t>>::value, "");
-static_assert( is_simd_mask<native_simd_mask<int16_t>>::value, "");
-static_assert( is_simd_mask<native_simd_mask<int32_t>>::value, "");
-static_assert( is_simd_mask<native_simd_mask<int64_t>>::value, "");
-static_assert( is_simd_mask<native_simd_mask<uint8_t>>::value, "");
-static_assert( is_simd_mask<native_simd_mask<uint16_t>>::value, "");
-static_assert( is_simd_mask<native_simd_mask<uint32_t>>::value, "");
-static_assert( is_simd_mask<native_simd_mask<uint64_t>>::value, "");
-static_assert( is_simd_mask<native_simd_mask<float>>::value, "");
-static_assert( is_simd_mask<native_simd_mask<double>>::value, "");
-
-static_assert( is_simd_mask<fixed_size_simd_mask<int8_t, 1>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<int16_t, 1>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<int32_t, 1>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<int64_t, 1>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint8_t, 1>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint16_t, 1>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint32_t, 1>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint64_t, 1>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<float, 1>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<double, 1>>::value, "");
-
-static_assert( is_simd_mask<fixed_size_simd_mask<int8_t, 3>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<int16_t, 3>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<int32_t, 3>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<int64_t, 3>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint8_t, 3>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint16_t, 3>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint32_t, 3>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint64_t, 3>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<float, 3>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<double, 3>>::value, "");
-
-static_assert( is_simd_mask<fixed_size_simd_mask<int8_t, 32>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<int16_t, 32>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<int32_t, 32>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<int64_t, 32>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint8_t, 32>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint16_t, 32>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint32_t, 32>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<uint64_t, 32>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<float, 32>>::value, "");
-static_assert( is_simd_mask<fixed_size_simd_mask<double, 32>>::value, "");
-
-static_assert(!is_simd_mask<void>::value, "");
-static_assert(!is_simd_mask<int>::value, "");
-static_assert(!is_simd_mask<float>::value, "");
-static_assert(!is_simd_mask<simd<int>>::value, "");
-static_assert(!is_simd_mask<simd<float>>::value, "");
-static_assert(!is_simd_mask<UserType>::value, "");
-
-#if TEST_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) &&        \
-    !defined(_LIBCPP_HAS_NO_INLINE_VARIABLES)
-
-static_assert( is_simd_mask_v<native_simd_mask<int8_t>>, "");
-static_assert( is_simd_mask_v<native_simd_mask<int16_t>>, "");
-static_assert( is_simd_mask_v<native_simd_mask<int32_t>>, "");
-static_assert( is_simd_mask_v<native_simd_mask<int64_t>>, "");
-static_assert( is_simd_mask_v<native_simd_mask<uint8_t>>, "");
-static_assert( is_simd_mask_v<native_simd_mask<uint16_t>>, "");
-static_assert( is_simd_mask_v<native_simd_mask<uint32_t>>, "");
-static_assert( is_simd_mask_v<native_simd_mask<uint64_t>>, "");
-static_assert( is_simd_mask_v<native_simd_mask<float>>, "");
-static_assert( is_simd_mask_v<native_simd_mask<double>>, "");
-
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int8_t, 1>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int16_t, 1>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int32_t, 1>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int64_t, 1>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint8_t, 1>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint16_t, 1>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint32_t, 1>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint64_t, 1>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<float, 1>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<double, 1>>, "");
-
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int8_t, 3>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int16_t, 3>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int32_t, 3>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int64_t, 3>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint8_t, 3>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint16_t, 3>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint32_t, 3>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint64_t, 3>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<float, 3>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<double, 3>>, "");
-
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int8_t, 32>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int16_t, 32>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int32_t, 32>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<int64_t, 32>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint8_t, 32>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint16_t, 32>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint32_t, 32>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<uint64_t, 32>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<float, 32>>, "");
-static_assert( is_simd_mask_v<fixed_size_simd_mask<double, 32>>, "");
-
-static_assert(!is_simd_mask_v<void>, "");
-static_assert(!is_simd_mask_v<int>, "");
-static_assert(!is_simd_mask_v<float>, "");
-static_assert(!is_simd_mask_v<simd<int>>, "");
-static_assert(!is_simd_mask_v<simd<float>>, "");
-static_assert(!is_simd_mask_v<UserType>, "");
-
-#endif
+static_assert(ex::is_simd_mask<ex::native_simd_mask<int8_t>>::value, "");
+static_assert(ex::is_simd_mask<ex::native_simd_mask<int16_t>>::value, "");
+static_assert(ex::is_simd_mask<ex::native_simd_mask<int32_t>>::value, "");
+static_assert(ex::is_simd_mask<ex::native_simd_mask<int64_t>>::value, "");
+static_assert(ex::is_simd_mask<ex::native_simd_mask<uint8_t>>::value, "");
+static_assert(ex::is_simd_mask<ex::native_simd_mask<uint16_t>>::value, "");
+static_assert(ex::is_simd_mask<ex::native_simd_mask<uint32_t>>::value, "");
+static_assert(ex::is_simd_mask<ex::native_simd_mask<uint64_t>>::value, "");
+static_assert(ex::is_simd_mask<ex::native_simd_mask<float>>::value, "");
+static_assert(ex::is_simd_mask<ex::native_simd_mask<double>>::value, "");
+
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int8_t, 1>>::value, "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int16_t, 1>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int32_t, 1>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int64_t, 1>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint8_t, 1>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint16_t, 1>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint32_t, 1>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint64_t, 1>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<float, 1>>::value, "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<double, 1>>::value, "");
+
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int8_t, 3>>::value, "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int16_t, 3>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int32_t, 3>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int64_t, 3>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint8_t, 3>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint16_t, 3>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint32_t, 3>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint64_t, 3>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<float, 3>>::value, "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<double, 3>>::value, "");
+
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int8_t, 32>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int16_t, 32>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int32_t, 32>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<int64_t, 32>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint8_t, 32>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint16_t, 32>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint32_t, 32>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<uint64_t, 32>>::value,
+              "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<float, 32>>::value, "");
+static_assert(ex::is_simd_mask<ex::fixed_size_simd_mask<double, 32>>::value,
+              "");
+
+static_assert(!ex::is_simd_mask<void>::value, "");
+static_assert(!ex::is_simd_mask<int>::value, "");
+static_assert(!ex::is_simd_mask<float>::value, "");
+static_assert(!ex::is_simd_mask<ex::simd<int>>::value, "");
+static_assert(!ex::is_simd_mask<ex::simd<float>>::value, "");
+static_assert(!ex::is_simd_mask<UserType>::value, "");
+
+static_assert(ex::is_simd_mask_v<ex::native_simd_mask<int8_t>>, "");
+static_assert(ex::is_simd_mask_v<ex::native_simd_mask<int16_t>>, "");
+static_assert(ex::is_simd_mask_v<ex::native_simd_mask<int32_t>>, "");
+static_assert(ex::is_simd_mask_v<ex::native_simd_mask<int64_t>>, "");
+static_assert(ex::is_simd_mask_v<ex::native_simd_mask<uint8_t>>, "");
+static_assert(ex::is_simd_mask_v<ex::native_simd_mask<uint16_t>>, "");
+static_assert(ex::is_simd_mask_v<ex::native_simd_mask<uint32_t>>, "");
+static_assert(ex::is_simd_mask_v<ex::native_simd_mask<uint64_t>>, "");
+static_assert(ex::is_simd_mask_v<ex::native_simd_mask<float>>, "");
+static_assert(ex::is_simd_mask_v<ex::native_simd_mask<double>>, "");
+
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int8_t, 1>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int16_t, 1>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int32_t, 1>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int64_t, 1>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint8_t, 1>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint16_t, 1>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint32_t, 1>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint64_t, 1>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<float, 1>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<double, 1>>, "");
+
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int8_t, 3>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int16_t, 3>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int32_t, 3>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int64_t, 3>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint8_t, 3>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint16_t, 3>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint32_t, 3>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint64_t, 3>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<float, 3>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<double, 3>>, "");
+
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int8_t, 32>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int16_t, 32>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int32_t, 32>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<int64_t, 32>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint8_t, 32>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint16_t, 32>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint32_t, 32>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<uint64_t, 32>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<float, 32>>, "");
+static_assert(ex::is_simd_mask_v<ex::fixed_size_simd_mask<double, 32>>, "");
+
+static_assert(!ex::is_simd_mask_v<void>, "");
+static_assert(!ex::is_simd_mask_v<int>, "");
+static_assert(!ex::is_simd_mask_v<float>, "");
+static_assert(!ex::is_simd_mask_v<ex::simd<int>>, "");
+static_assert(!ex::is_simd_mask_v<ex::simd<float>>, "");
+static_assert(!ex::is_simd_mask_v<UserType>, "");
 
 int main() {}