Merge branch 'rightlib' into mergelibs-241120-1113

4 files changed, 40 insertions, 0 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/scalar.h b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/scalar.h
index 341292612e..479809392f 100644
--- a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/scalar.h
+++ b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/scalar.h
@@ -46,6 +46,11 @@ struct __simd_operations<_Tp, simd_abi::__scalar> {
   using _MaskStorage = __mask_storage<_Tp, simd_abi::__scalar>;
 
   static _LIBCPP_HIDE_FROM_ABI _SimdStorage __broadcast(_Tp __v) noexcept { return {__v}; }
+
+  template <class _Generator>
+  static _LIBCPP_HIDE_FROM_ABI _SimdStorage __generate(_Generator&& __g) noexcept {
+    return {__g(std::integral_constant<size_t, 0>())};
+  }
 };
 
 template <class _Tp>
diff --git a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/simd.h b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/simd.h
index 30856f4b03..954f94c907 100644
--- a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/simd.h
+++ b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/simd.h
@@ -44,6 +44,10 @@ public:
   template <class _Up, enable_if_t<__can_broadcast_v<value_type, __remove_cvref_t<_Up>>, int> = 0>
   _LIBCPP_HIDE_FROM_ABI simd(_Up&& __v) noexcept : __s_(_Impl::__broadcast(static_cast<value_type>(__v))) {}
 
+  // generator constructor
+  template <class _Generator, enable_if_t<__can_generate_v<value_type, _Generator, size()>, int> = 0>
+  explicit _LIBCPP_HIDE_FROM_ABI simd(_Generator&& __g) : __s_(_Impl::__generate(std::forward<_Generator>(__g))) {}
+
   // scalar access [simd.subscr]
   // Add operator[] temporarily to test braodcast. Add test for it in later patch.
   _LIBCPP_HIDE_FROM_ABI value_type operator[](size_t __i) const { return __s_.__get(__i); }
diff --git a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/utility.h b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/utility.h
index 0dba345e05..847d006629 100644
--- a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/utility.h
+++ b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/utility.h
@@ -19,6 +19,7 @@
 #include <__type_traits/is_volatile.h>
 #include <__type_traits/void_t.h>
 #include <__utility/declval.h>
+#include <__utility/integer_sequence.h>
 #include <cstdint>
 #include <limits>
 
@@ -71,6 +72,25 @@ inline constexpr bool __can_broadcast_v =
     (!__is_vectorizable_v<_Up> && is_convertible_v<_Up, _Tp>) || is_same_v<_Up, int> ||
     (is_same_v<_Up, unsigned int> && is_unsigned_v<_Tp>);
 
+template <class _Tp, class _Generator, std::size_t _Idx, class = void>
+inline constexpr bool __is_well_formed = false;
+
+template <class _Tp, class _Generator, std::size_t _Idx>
+inline constexpr bool
+    __is_well_formed<_Tp,
+                     _Generator,
+                     _Idx,
+                     std::void_t<decltype(std::declval<_Generator>()(integral_constant<size_t, _Idx>()))>> =
+        __can_broadcast_v<_Tp, decltype(std::declval<_Generator>()(integral_constant<size_t, _Idx>()))>;
+
+template <class _Tp, class _Generator, std::size_t... _Idxes>
+_LIBCPP_HIDE_FROM_ABI constexpr bool __can_generate(index_sequence<_Idxes...>) {
+  return (true && ... && __is_well_formed<_Tp, _Generator, _Idxes>);
+}
+
+template <class _Tp, class _Generator, std::size_t _Size>
+inline constexpr bool __can_generate_v = experimental::__can_generate<_Tp, _Generator>(make_index_sequence<_Size>());
+
 } // namespace parallelism_v2
 _LIBCPP_END_NAMESPACE_EXPERIMENTAL
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/vec_ext.h b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/vec_ext.h
index 44a1f481ab..4b23bfe384 100644
--- a/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/vec_ext.h
+++ b/contrib/libs/cxxsupp/libcxx/include/experimental/__simd/vec_ext.h
@@ -11,6 +11,7 @@
 #define _LIBCPP_EXPERIMENTAL___SIMD_VEC_EXT_H
 
 #include <__bit/bit_ceil.h>
+#include <__utility/forward.h>
 #include <cstddef>
 #include <experimental/__simd/internal_declaration.h>
 #include <experimental/__simd/utility.h>
@@ -56,6 +57,16 @@ struct __simd_operations<_Tp, simd_abi::__vec_ext<_Np>> {
     }
     return __result;
   }
+
+  template <class _Generator, size_t... _Is>
+  static _LIBCPP_HIDE_FROM_ABI _SimdStorage __generate_init(_Generator&& __g, std::index_sequence<_Is...>) {
+    return _SimdStorage{{__g(std::integral_constant<size_t, _Is>())...}};
+  }
+
+  template <class _Generator>
+  static _LIBCPP_HIDE_FROM_ABI _SimdStorage __generate(_Generator&& __g) noexcept {
+    return __generate_init(std::forward<_Generator>(__g), std::make_index_sequence<_Np>());
+  }
 };
 
 template <class _Tp, int _Np>