From: Matthias Kretz <m.kretz@gsi.de>
Date: Thu, 1 Jun 2023 08:40:14 +0000 (+0200)
Subject: libstdc++: Fix condition for supported SIMD types on ARMv8
X-Git-Tag: basepoints/gcc-15~8676
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2fbbaa77c8468ed2bdf2cfa1a5890991e4e98eef;p=thirdparty%2Fgcc.git

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 f94b8361ab06..834fe923065b 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