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

#1955

as a stopgap measure for https://github.com/numpy/numpy/issues/13401 as mentioned in #1955

as trivial copy of ?asum with the fabs calls removed

Disable the AVX512 DGEMM kernel (again)

Due to as yet unresolved errors seen in #1955 and #2029

Fix bug #2047.

Signed-off-by: Celelibi <celelibi@gmail.com>

Fix inline assembly constraints in Bulldozer TRSM kernels

Fix inline assembly constraints in various x86_64 GEMVN kernels

rework indices to allow marking i,as and bs as both input and output (marked operand n1 as well for simplicity). For #2009

rework indices to allow marking argument lda as input and output.

rework indices to allow marking argument lda4 as input and output. For #2009