[gcc r17-3462] ext-floating14.C: Compile with -mno-avx512bf16 -mno-avxneconvert

https://gcc.gnu.org/g:e7a2a4825d90ddaeed7eb57c3e63d6cad7ccf78f

commit r17-3462-ge7a2a4825d90ddaeed7eb57c3e63d6cad7ccf78f
Author: H.J. Lu <[email protected]>
Date:   Thu Aug 20 15:24:16 2026 +0800

    ext-floating14.C: Compile with -mno-avx512bf16 -mno-avxneconvert
    
    Compile ext-floating14.C with -mno-avx512bf16 -mno-avxneconvert for x86
    to avoid
    
    FAIL: g++.dg/cpp23/ext-floating14.C  -std=gnu++23 (test for excess errors)
    FAIL: g++.dg/cpp23/ext-floating14.C  -std=gnu++26 (test for excess errors)
    FAIL: g++.dg/cpp23/ext-floating14.C  -std=gnu++29 (test for excess errors)
    
    with warnings like
    
    ext-floating14.C:112:111: warning: ‘__bfloat16’ is redefined from typedef ‘short’ to real ‘__bf16’ since GCC 13.1, be careful of implicit conversion between ‘__bf16’ and ‘short’; an explicit bitcast may be needed here
    
    when AVXNECONVERT or AVX512BF16 are enabled by default.
    
            PR testsuite/126923
            * g++.dg/cpp23/ext-floating14.C (dg-additional-options): Add
            -mno-avx512bf16 -mno-avxneconvert for x86.
    
    Signed-off-by: H.J. Lu <[email protected]>

Diff:
---
 gcc/testsuite/g++.dg/cpp23/ext-floating14.C | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/testsuite/g++.dg/cpp23/ext-floating14.C b/gcc/testsuite/g++.dg/cpp23/ext-floating14.C
index 668b765b93d3..8fe3c5158aa2 100644
--- a/gcc/testsuite/g++.dg/cpp23/ext-floating14.C
+++ b/gcc/testsuite/g++.dg/cpp23/ext-floating14.C
@@ -2,6 +2,7 @@
 // PR target/107703
 // { dg-do run { target c++23 } }
 // { dg-options "-fexcess-precision=standard" }
+// { dg-additional-options "-mno-avx512bf16 -mno-avxneconvert" { target { i?86-*-* x86_64-*-* } } }
 
 #include "ext-floating.h"