This bug is not there in 8.x nor in the 9.0 daily snapshot.

Signed-off-by: Wang, Long <long1.wang@intel.com>

Signed-off-by: Wang, Long <long1.wang@intel.com>

For large matrix, e.g. M=N=K, and M>1290, int mnk=M*N*K will overflow.
This will lead to wrong branching to single-threading. The performance
is downgraded significantly.

Signed-off-by: Wang, Long <long1.wang@intel.com>

96-99% 1-thread performance of MKL2018

90% MKL 1-thread performance.

broken by #2222 as CREAL,CIMAG do not expand to a valid lvalue with these compilers

* Add multithreading support

copied from the ThunderX2T99 kernel. For #2221

Replace vpermpd with vpermilpd in the Haswell DTRMM kernel

Replace most vpermpd calls in the Haswell DTRSM_RN kernel

to improve performance on AMD Zen (#2180) applying wjc404's improvement of the DGEMM kernel from #2186

Add vbroadcastsd kernel to dgemm_kernel_4x8_haswell.S

Replace vpermpd with vpermilpd in the Haswell/Zen zdot microkernel

to improve performance on Zen/Zen2 (as demonstrated by wjc404 in #2180)

replaced a bunch of vpermpd instructions with vpermilpd and vperm2f128

* Mark iamax_sse.S as unsuitable for MIN due to issue #2116
* Use iamax.S rather than iamax_sse.S for ISMIN/ISAMIN on all x86_64 as workaround for #2116