[gcc r14-1463] libstdc++: Fix condition for supported SIMD types on ARMv8

[gcc r14-1463] libstdc++: Fix condition for supported SIMD types on ARMv8

[Matthias Kretz]

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