On a target that defaults to -mlong-double-64 -msse,
standard_abi_usable.cc and other tests fail to compile because of the
assert that rejects long double. As on ppc, we can trivially make
things work for -mlong-double-64.
Regstrapped on x86_64-linux-gnu. Also tested with -mlong-double-64 on
libstdc++ tests that triggered the static_assert. Ok to install?
for libstdc++-v3/ChangeLog
* include/experimental/bits/simd.h (__intrinsic_type): Accept
64-bit long doubles on x86 SSE.
---
libstdc++-v3/include/experimental/bits/simd.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/experimental/bits/simd.h
b/libstdc++-v3/include/experimental/bits/simd.h
index c2ac5adedaccf..b96818af6e6ff 100644
--- a/libstdc++-v3/include/experimental/bits/simd.h
+++ b/libstdc++-v3/include/experimental/bits/simd.h
@@ -2469,7 +2469,9 @@ template <>
template <typename _Tp, size_t _Bytes>
struct __intrinsic_type<_Tp, _Bytes, enable_if_t<__is_vectorizable_v<_Tp> &&
_Bytes <= 64>>
{
- static_assert(!is_same_v<_Tp, long double>,
+ // allow _Tp == long double with -mlong-double-64
+ static_assert(!(is_same_v<_Tp, long double>
+ && sizeof(long double) > sizeof(double)),
"no __intrinsic_type support for long double on x86");
static constexpr size_t _S_VBytes = _Bytes <= 16 ? 16 : _Bytes <= 32 ? 32
: 64;
--
Alexandre Oliva, happy hacker https://blog.lx.oliva.nom.br/
Free Software Activist FSFLA co-founder GNU Toolchain Engineer
More tolerance and less prejudice are key for inclusion and diversity.
Excluding neuro-others for not behaving ""normal"" is *not* inclusive!
