Broadcast is a very common function. This should reduce compile-time
effort.
Signed-off-by: Matthias Kretz <m.kr...@gsi.de>
libstdc++-v3/ChangeLog:
PR libstdc++/108030
* include/experimental/bits/simd.h (__vector_broadcast):
Implement via __vector_broadcast_impl instead of
__call_with_n_evaluations + 2 lambdas.
(__vector_broadcast_impl): New.
---
libstdc++-v3/include/experimental/bits/simd.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--
──────────────────────────────────────────────────────────────────────────
Dr. Matthias Kretz https://mattkretz.github.io
GSI Helmholtz Centre for Heavy Ion Research https://gsi.de
stdₓ::simd
──────────────────────────────────────────────────────────────────────────diff --git a/libstdc++-v3/include/experimental/bits/simd.h b/libstdc++-v3/include/experimental/bits/simd.h
index 2f615d13b73..7482d109291 100644
--- a/libstdc++-v3/include/experimental/bits/simd.h
+++ b/libstdc++-v3/include/experimental/bits/simd.h
@@ -1798,15 +1798,15 @@ __to_intrin(_Tp __x)
// }}}
// __vector_broadcast{{{
+template <size_t _Np, typename _Tp, size_t... _I>
+ _GLIBCXX_SIMD_INTRINSIC constexpr __vector_type_t<_Tp, _Np>
+ __vector_broadcast_impl(_Tp __x, index_sequence<_I...>)
+ { return __vector_type_t<_Tp, _Np>{((void)_I, __x)...}; }
+
template <size_t _Np, typename _Tp>
_GLIBCXX_SIMD_INTRINSIC constexpr __vector_type_t<_Tp, _Np>
__vector_broadcast(_Tp __x)
- {
- return __call_with_n_evaluations<_Np>(
- [](auto... __xx) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
- return __vector_type_t<_Tp, _Np>{__xx...};
- }, [&__x](int) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x; });
- }
+ { return __vector_broadcast_impl<_Np, _Tp>(__x, make_index_sequence<_Np>()); }
// }}}
// __generate_vector{{{
