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libstdc++: Support -mlong-double-64 on PPC

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libstdc++-v3/ChangeLog:

	* include/experimental/bits/simd.h: Let __intrinsic_type<long
	double, N> be valid if sizeof(long double) == sizeof(double) and
	use a __vector double as member type.
This commit is contained in:
Matthias Kretz 2021-02-03 15:49:29 +00:00 committed by Jonathan Wakely
parent 4f22942841
commit db256f9bef
1 changed files with 8 additions and 3 deletions
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11
libstdc++-v3/include/experimental/bits/simd.h
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@ -2285,7 +2285,9 @@ template <typename _Tp, size_t _Bytes>
struct __intrinsic_type<_Tp, _Bytes,
enable_if_t<__is_vectorizable_v<_Tp> && _Bytes <= 16>>
{
static_assert(!is_same_v<_Tp, long double>,
static constexpr bool _S_is_ldouble = is_same_v<_Tp, long double>;
// allow _Tp == long double with -mlong-double-64
static_assert(!(_S_is_ldouble && sizeof(long double) > sizeof(double)),
"no __intrinsic_type support for long double on PPC");
#ifndef __VSX__
static_assert(!is_same_v<_Tp, double>,
@ -2297,8 +2299,11 @@ template <typename _Tp, size_t _Bytes>
"no __intrinsic_type support for integers larger than 4 Bytes "
"on PPC w/o POWER8 vectors");
#endif
using type = typename __intrinsic_type_impl<conditional_t<
is_floating_point_v<_Tp>, _Tp, __int_for_sizeof_t<_Tp>>>::type;
using type =
typename __intrinsic_type_impl<
conditional_t<is_floating_point_v<_Tp>,
conditional_t<_S_is_ldouble, double, _Tp>,
__int_for_sizeof_t<_Tp>>>::type;
};
#endif // __ALTIVEC__