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AVX512 Support #3776

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AVX512 Support #3776

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Commits on Jul 3, 2024

  1. Initial AVX512 Support 

    CMake Changes:
Added the AVX512F_SUPPORT flag to CMake. Set by checking
if system supports AVX512F. If it doesn't it will not build (and therefore run) any of the AVX512 tests

Added the target descriptions. Assumed that PKRU support also implies AVX512 support as I could find no information that said otherwise.

Added gdb_avx512 test - sets 3 ZMM registers and reads them back in a gdb session of a replay to verify the contents.

We place mask registers K0-K7 after ZMM31H internally, because this simplifies the logic that parses the XSAVE area. The target description we provide, takes this into account (and also places them last) so they come after the ZMM registers in the 'g' packet. GDB doesn't care so long as we do what we say in the target desc

Changed test harness util.sh to also export TESTNAME variable as we may (I do at least) want to query from the python script what mode we are running in (64-bit/32-bit). See gdb_avx512.py for further info.
    @theIDinside
    theIDinside committed Jul 3, 2024
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  2. Bug fix 

    AVX512F support always returned true due to using -mavx512f as flag instead of -march=native to `try_compile`
    @theIDinside
    theIDinside committed Jul 3, 2024
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