[glibc] x86: Enable Prefer_No_AVX512 for Hygon model 0x8

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=efb343f3311dfc941d08b136e7b1282684742310

commit efb343f3311dfc941d08b136e7b1282684742310
Author: xiejiamei <[email protected]>
Date:   Wed Apr 29 08:20:30 2026 +0000

    x86: Enable Prefer_No_AVX512 for Hygon model 0x8
    
    Extend the Prefer_No_AVX512 tuning to cover Hygon model 0x8.
    
    Benchmarks on Hygon platforms show that EVEX implementations
    are often more profitable than AVX512 paths. The existing logic
    already enables Prefer_No_AVX512 for model 0x7. Apply the same
    preference to model 0x8 to ensure consistent IFUNC selection
    behavior across newer Hygon processors.
    
    Signed-off-by: xiejiamei <[email protected]>
    Reviewed-by: H.J. Lu <[email protected]>

Diff:
---
 sysdeps/x86/cpu-features.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index 73ee4f2bb8..a453136827 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -1135,7 +1135,7 @@ disable_tsx:
 	  cpu_features->preferred[index_arch_AVX_Fast_Unaligned_Load]
 	    &= ~bit_arch_AVX_Fast_Unaligned_Load;
 	}
-      else if (model == 0x7)
+      else if (model == 0x7 || model == 0x8)
 	{
 	  /* Benchmarks indicate evex can be more profitable on Hygon
 	     hardware than AVX512.  */