When I originally refactored memory.c to reduce locking, I made the (incorrect) assumption that all threads were managed by OpenBLAS.  The recent Issues we've seen show that really, any caller can make its own threads and call into OpenBLAS; they don't all come from blas_server.  Thus we have to be able to support an arbitrary number of threads that can come in any time.  The original implementation (before my changes) dealt with this by having a single allocation table, and everyone had to lock to get access to and update it, which was expensive.  Moving to thread-local allocation tables was much faster, but now we have to deal with the fact that thread local storage might not be cleaned up.

This change gives each thread its own local allocation table, and completely does away with the global table.  We cleanup allocations using pthreads' key destructor and Win32's DLL_THREAD_DETACH.

This change also removes compiler TLS, which in the end, wasn't really worth it given the issues with the glibc implementation.  The overall performance impact was < 1%, anyway.  Removing it also simplifies the code.

Support arbitrary numbers of threads for memory allocation.

When I originally refactored memory.c to reduce locking, I made the (incorrect) assumption that all threads were managed by OpenBLAS.  The recent Issues we've seen show that really, any caller can make its own threads and call into OpenBLAS; they don't all come from blas_server.  Thus we have to be able to support an arbitrary number of threads that can come in any time.  The original implementation (before my changes) dealt with this by having a single allocation table, and everyone had to lock to get access to and update it, which was expensive.  Moving to thread-local allocation tables was much faster, but now we have to deal with the fact that thread local storage might not be cleaned up.

This change gives each thread its own local allocation table, and completely does away with the global table.  We cleanup allocations using pthreads' key destructor and Win32's DLL_THREAD_DETACH.

This change also removes compiler TLS, which in the end, wasn't really worth it given the issues with the glibc implementation.  The overall performance impact was < 1%, anyway.  Removing it also simplifies the code.

Add an AVX512 enabled DDOT function

written in C intrinsics for best readability.
(the same C code works for Haswell as well)

For logistical reasons the code falls back to the existing
haswell AVX2 implementation if the GCC or LLVM compiler is not new enough

Add workaround for avx512 compilations on Cygwin

fixes #1708

fix blasabs for windows

Bugfix in #1713 for Windows (LLP64), where `blasabs` needs to be `llabs` rather than `labs` for the 64-bit API.

Introduce blasabs macro and use it to switch between abs and labs for INTERFACE64

fabs -> fabsl

Fixes two calls that were using `fabs` on a `long double` argument rather than `fabsl`, which looks like it is doing an unintentional truncation to `double` precision.

Set EXPORT_NAME to match OpenBLASConfig.cmake

Haiku supporting patches

Fix #1705 where we incorrectly calculate page locations.

Since we now use an allocation size that isn't a multiple of PAGESIZE, finding
the pages for run_bench wasn't terminating properly.  Now we detect if we've
found enough pages for the allocation and terminate the loop.

Do not treat WIndows UWB builds as cross-compiling

Unset memory table entry, not just the local pointer to it on shutdown

to fix crash with multiple instances of OpenBLAS, #1692

Temporarily disable special handling of OPENMP thread memory allocation

for issue #1673

Add cpu identification via mfpvr call for the BSDs

Work around utest failures in the MIPS64 SICORTEX target

fixes #1671

Fix wrong redefinitions of snprintf for older MSVC

_snprintf_s takes an additional (size) argument, so is no direct replacement.
(Note that this code is currently unused - the two instances of snprintf here are within ifdef blocks that are not compiled for MSVC)

MS _snprintf_s takes an additional argument for the size of the buffer, so is not a direct replacement (utest/ctest.h from which I copied was wrong)

Define snprintf for older versions of MSVC

for #1677

Revert "Rewrite &= -> = and simplify the initial blocking phase."

Add cpuid for AMD Ryzen 2

Double MAX_ALLOCATING_THREADS to fix segfaults with Go and Octave

for #1664

Add -march=skylake-avx512 to AVX512 compile check and suppress its ou…

for #1641

Fix typo that broke compilation with DYNAMIC_ARCH and NO_AVX2