rebase

fix avx2 detection

reword commits to make it clearer

Optimize caxpy for POWER10

This patch makes use of new POWER10 vector pair instructions for
loads and stores.

Refactor the performance measurement system

Implementation of BF16 based gemv

Fix cooperlake compile issue

Add a missing macro which is required in Makefile.x86_64 due to recent
clearnup, which causes cooperlake platform build failure.

1. Add a new API -- sbgemv to support bfloat16 based gemv
2. Implement a generic kernel for sbgemv
3. Implement an avx512-bf16 based kernel for sbgemv

Signed-off-by: Chen, Guobing <guobing.chen@intel.com>

reuse variables defined in Makefile.system

Minor Makefile cleanup

Try to read cpu ID from /sys/devices/.../cpu0 if HWCAP_CPUID fails

Expressly enable neon for use with intrinsics if available

Optimize saxpy for POWER10

This patch makes use of new POWER10 vector pair instructions for
loads and stores.

Move definitions that are neither needed nor supported on Solaris

Merge back 0.3.12 tag (and Changelog typo fixes) from release

Merge from develop for 0.3.12 release

Comment out  BUILD_SINGLE etc. in Makefile.rule and add a short explanation

Fix grouping of sladiv1/dladiv1/ilaenv2stage in gensymbol