[PATCH 08/11] x86: add a few more NOP patterns

[Florian Weimer]

* Jan Beulich via Binutils:

> First of all add f32_5[], allowing to eliminate the extra slot-is-NULL
> code from i386_output_nops(). Plus then introduce f32_8[] and f16_5[]
> following the same concept of adding a %cs segment override prefix.
>
> Also re-use patterns when possible and correct comments as applicable.
> Similarly re-use testcase expectations as much as possible, where they
> need touching anyway.
> ---
> The x86-64-nops-5* tests are kind of bogus: The source file has .code32
> almost first thing, and hence there's no real 64-bit testing there. We
> could likely as well delete them, rather than fiddling with them here.

This change has been associated with a crash in the Nvidia drivers.  It
seems that if glibc is built with this, the Nvidia driver is no longer
able to find the right place to patch in _dl_debug_update:

<https://bugzilla.redhat.com/show_bug.cgi?id=2357062#c5>
<https://forums.developer.nvidia.com/t/slackware64-current-multilib-after-update-to-glibc-2-39-32-bit-glx-programs-segfault/281769/3>

Not sure if there's anything we can do about this.

Thanks,
Florian