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* [Bug libc/30328] New: elf/tst-cpu-features-cpuinfo fails on Athlon 64 3000+ (K8)
@ 2023-04-09  8:10 xry111 at xry111 dot site
  0 siblings, 0 replies; only message in thread
From: xry111 at xry111 dot site @ 2023-04-09  8:10 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=30328

            Bug ID: 30328
           Summary: elf/tst-cpu-features-cpuinfo fails on Athlon 64 3000+
                    (K8)
           Product: glibc
           Version: 2.37
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: xry111 at xry111 dot site
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

The failed test is:

Checking HAS_CPU_FEATURE (PREFETCHW):
  HAS_CPU_FEATURE (PREFETCHW): 0
  cpuinfo (3dnowprefetch): 1
 *** failure ***

In the kernel there is:

        /* 3DNow or LM implies PREFETCHW */
        if (!cpu_has(c, X86_FEATURE_3DNOWPREFETCH))
                if (cpu_has(c, X86_FEATURE_3DNOW) || cpu_has(c,
X86_FEATURE_LM))
                        set_cpu_cap(c, X86_FEATURE_3DNOWPREFETCH);

But it seems no equivalent in Glibc.

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2023-04-09  8:10 [Bug libc/30328] New: elf/tst-cpu-features-cpuinfo fails on Athlon 64 3000+ (K8) xry111 at xry111 dot site

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