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From: Matthias Kretz <mkretz@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r14-1463] libstdc++: Fix condition for supported SIMD types on ARMv8 Date: Thu, 1 Jun 2023 08:49:39 +0000 (GMT) [thread overview] Message-ID: <20230601084939.B7D693858D33@sourceware.org> (raw) https://gcc.gnu.org/g:2fbbaa77c8468ed2bdf2cfa1a5890991e4e98eef commit r14-1463-g2fbbaa77c8468ed2bdf2cfa1a5890991e4e98eef Author: Matthias Kretz <m.kretz@gsi.de> Date: Thu Jun 1 10:40:14 2023 +0200 libstdc++: Fix condition for supported SIMD types on ARMv8 Signed-off-by: Matthias Kretz <m.kretz@gsi.de> libstdc++-v3/ChangeLog: PR libstdc++/110050 * include/experimental/bits/simd.h (__vectorized_sizeof): With __have_neon_a32 only single-precision float works (in addition to integers). Diff: --- libstdc++-v3/include/experimental/bits/simd.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/libstdc++-v3/include/experimental/bits/simd.h b/libstdc++-v3/include/experimental/bits/simd.h index f94b8361ab0..834fe923065 100644 --- a/libstdc++-v3/include/experimental/bits/simd.h +++ b/libstdc++-v3/include/experimental/bits/simd.h @@ -2808,8 +2808,10 @@ template <typename _Tp> return 16; // ARM: - if constexpr (__have_neon_a64 - || (__have_neon_a32 && !is_same_v<_Tp, double>) ) + if constexpr (__have_neon_a64) + return 16; + if constexpr (__have_neon_a32 and (not is_floating_point_v<_Tp> + or is_same_v<_Tp, float>)) return 16; if constexpr (__have_neon && sizeof(_Tp) < 8
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