FreeBSD Manual Pages
std::experi...::copy_from(3) C++ Standard Libary std::experi...::copy_from(3) NAME std::experimental::simd::copy_from - std::experimental::simd::copy_from Synopsis template< class U, class Flags > (parallelism TS v2) void copy_from( const U* mem, Flags flags ); The load function replaces all elements of a simd such that the i^th element is assigned with static_cast<T>(mem[i]) for all i in the range of [0, size()). Parameters mem - a pointer into an array where [mem, mem + size()) is a valid range flags - if of type vector_aligned_tag, the load constructor may as- sume mem to point to storage aligned by memory_alignment_v<simd, U> Type requirements - U must be a vectorizable type. - is_simd_flag_type_v<Flags> must be true. Example // Run this code #include <cstddef> #include <experimental/simd> #include <iostream> #include <numeric> namespace stdx = std::experimental; void print(auto const& a) { for (std::size_t i{}; i != std::size(a); ++i) std::cout << a[i] << ' '; std::cout << '\n'; } int main() { alignas(stdx::memory_alignment_v<stdx::native_simd<int>>) std::array<int, stdx::native_simd<int>::size() * 2> mem = {}; std::iota(mem.begin(), mem.end(), 0); print(mem); stdx::native_simd<int> a; // uninitialized a.copy_from(&mem[0], stdx::vector_aligned); print(a); a.copy_from(&mem[1], stdx::element_aligned); // vector_aligned would likely crash print(a); } Possible output: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 See also memory_alignment obtains an appropriate alignment for vec- tor_aligned (parallelism TS v2) (class template) copy_to stores simd elements to contiguous memory (parallelism TS v2) (public member function) constructor constructs a simd object (parallelism TS v2) (public member function) http://cppreference.com 2024.06.10 std::experi...::copy_from(3)
NAME | Synopsis | Parameters | Type requirements | Example | Possible output: | See also
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::experimental::simd::copy_from&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>