Use BLIS 2.0

[ViralBShah]

It seems like Yggdrasil build of BLIS for mac aarch64 has some problems, which are not obvious from the logs. Given that things work fine on x64 on linux and windows, I am now thinking there's some problem with the default build on mac.

We also have some patches we carry from BLIS 1.0 and while they apply fine, I am not sure if they are required. Could those be causing the problems we are seeing?

cc @imciner2 @giordano

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.66%. Comparing base (b6764e5) to head (1739aff).
⚠️ Report is 16 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #19   +/-   ##
=======================================
  Coverage   91.66%   91.66%           
=======================================
  Files           1        1           
  Lines          12       12           
=======================================
  Hits           11       11           
  Misses          1        1           

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[ViralBShah]

I was able to fix the blis build by forcing the arch to be firestorm instead of arm64 for mac.

[imciner2]

Sounds like the SVE kernels in BLIS might have an issue on the M-series chips. I don't have one to try locally, unfortunately, so I guess firestorm is good enough for now.

[giordano]

Sounds like the SVE kernels in BLIS might have an issue on the M-series chips

Well, Apple Silicon doesn't have SVE, they also accurately avoided in M4 which is armv9, causing a mess in clang.

[imciner2]

Well, Apple Silicon doesn't have SVE, they also accurately avoided in M4 which is armv9, causing a mess in clang.

Huh, I thought they had SVE in the M series. I wonder if this points to a problem with autodetection logic in BLIS then where it tries to use the wrong kernels and can't get the proper paramters.