https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115362
Bug ID: 115362
Summary: fixed_size_simd dot product recognition not working
for stdx::reduce
Product: gcc
Version: 14.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jondaniel879 at gmail dot com
Target Milestone: ---
namespace stdx = std::experimental;
using namespace stdx::parallelism_v2;
template<typename FIRST, typename... OTHER,
typename = std::enable_if_t<(std::is_convertible_v<std::decay_t<OTHER>, const
stdx::fixed_size_simd<T,N>> && ...)>>
static inline constexpr T dot(FIRST first, OTHER&&... other)
{
return stdx::reduce(first * (... * std::forward<OTHER>(other)));
}
doesn't generate vdpp(s/d) on AVX machines.
