[PATCH 0/3] RFC: Platform Support for AMD Zen and AVX2/AVX

[Prem Mallappa]

From: Prem Mallappa <Premachandra.Mallappa@amd.com>

Hello Glibc Community,

== (cross posting to libc-alpha, apologies for the spam) ==

This is in response to

[1] https://sourceware.org/bugzilla/show_bug.cgi?id=24979
[2] https://sourceware.org/bugzilla/show_bug.cgi?id=24080
[3] https://sourceware.org/bugzilla/show_bug.cgi?id=23249

It is clear that there is no panacea here. However,
here is an attempt to address them in parts.

>From [1], enable customers who already have
"haswell" libs and has seen perf benifits by loading
them on AMD Zen.
(Load libraries by placing them in LD_LIBRARY_PATH/zen
or by a symbolic link zen->haswell)

>From [2] and [3]
And, A futuristic generic-avx2/generic-avx libs,
enables OS vendors to supply an optimized set.
And haswell/zen are really a superset, hence
keeping it made sense.

By this we would like to open it up for discussion
The haswell/zen can be intel/amd
(or any other name, and supply ifunc based loading
internally)

Prem Mallappa (3):
  x86: Refactor platform support in cpu_features
  x86: Add AMD Zen and AVX2/AVX platform support
  x86: test to load from PLATFORM path

 sysdeps/x86/cpu-features.c | 113 ++++++++++++++++++++++---------------
 sysdeps/x86_64/Makefile    |   3 +-
 2 files changed, 69 insertions(+), 47 deletions(-)

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2.20.1