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 --git a/libstdc++-v3/include/experimental/bits/simd.h b/libstdc++-v3/include/experimental/bits/simd.h
index f94b8361ab068efc09672df2ed84ac09d861b8c1..834fe923065bd7bdfe4af8c6cdb2d5224081b306 100644 (file)
--- 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