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libstdc++: Ensure unrolled loops inline the lambda

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Signed-off-by: Matthias Kretz <m.kretz@gsi.de>

libstdc++-v3/ChangeLog:

	* include/experimental/bits/simd.h (__execute_on_index_sequence)
	(__execute_on_index_sequence_with_return)
	(__call_with_n_evaluations, __call_with_subscripts): Add flatten
	attribute.
This commit is contained in:
Matthias Kretz 2021-06-24 14:20:15 +01:00 committed by Jonathan Wakely
parent d5125819d8
commit 8888795ad1
1 changed files with 8 additions and 4 deletions
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12
libstdc++-v3/include/experimental/bits/simd.h
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@ -234,7 +234,8 @@ namespace __detail
// unrolled/pack execution helpers
// __execute_n_times{{{
template <typename _Fp, size_t... _I>
_GLIBCXX_SIMD_INTRINSIC constexpr void
[[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
void
__execute_on_index_sequence(_Fp&& __f, index_sequence<_I...>)
{ ((void)__f(_SizeConstant<_I>()), ...); }
@ -254,7 +255,8 @@ template <size_t _Np, typename _Fp>
// }}}
// __generate_from_n_evaluations{{{
template <typename _R, typename _Fp, size_t... _I>
_GLIBCXX_SIMD_INTRINSIC constexpr _R
[[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
_R
__execute_on_index_sequence_with_return(_Fp&& __f, index_sequence<_I...>)
{ return _R{__f(_SizeConstant<_I>())...}; }
@ -269,7 +271,8 @@ template <size_t _Np, typename _R, typename _Fp>
// }}}
// __call_with_n_evaluations{{{
template <size_t... _I, typename _F0, typename _FArgs>
_GLIBCXX_SIMD_INTRINSIC constexpr auto
[[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
auto
__call_with_n_evaluations(index_sequence<_I...>, _F0&& __f0, _FArgs&& __fargs)
{ return __f0(__fargs(_SizeConstant<_I>())...); }
@ -285,7 +288,8 @@ template <size_t _Np, typename _F0, typename _FArgs>
// }}}
// __call_with_subscripts{{{
template <size_t _First = 0, size_t... _It, typename _Tp, typename _Fp>
_GLIBCXX_SIMD_INTRINSIC constexpr auto
[[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
auto
__call_with_subscripts(_Tp&& __x, index_sequence<_It...>, _Fp&& __fun)
{ return __fun(__x[_First + _It]...); }