When building with dynamic arch support, only build kernels for
architectures that are supported by the gcc we are building with.

Signed-off-by: Marius Hillenbrand <mhillen@linux.ibm.com>

When building OpenBLAS with DYNAMIC_ARCH=1 on s390x (aka zarch), make
sure to include support for systems without the facilities introduced
with z13 (i.e., zarch_generic). Adjust runtime detection to fallback to
that generic code when running on a unknown platform other than Z13
through Z15.

When detecting a Z13 or newer system, add a check for gcc support for
the architecture-specific features before selecting the respective
kernel. Fallback to Z13 or generic code, in case.

Signed-off-by: Marius Hillenbrand <mhillen@linux.ibm.com>

Improve shgemm test

This patch adds another check to test shgemm results.

Include shgemm in benchtest

This patch is to enable benchtest for half precision gemm
when BUILD_HALF is set during make.

Temporary workaround for excessive LAPACK test failures with COMPLEX on Skylake-X

Something in the plain C parts of x86_64 cscal.c and zscal.c appears to be miscompiled by both gfortran9 and ifort when compiling for skylakex-avx512, even when the optimized Haswell microkernel is not in use.

Correct ifort options

to same as suggested by reference-lapack

Handle trailing whitespace and empty variables in KERNEL files

rebase

Fix cmake compilation issue - POWER9

This patch removes extra space in the sgemmotcopy filename
thereby allowing it to create entry in kernel/Makefile
created by cmake.

Add FFLAGS_DRV entry to the generated make.inc to fix lapack-test failure with Intel compilers

fixes #2552

rebase

DAXPY Optimizations for ThunderX2

Improve performance of DAXPY for ThunderX2
when the vector fits in L1 Cache.

Undefine NAME/CNAME etc  in Makefile.system before defining them

to avoid redefinition warning when environment variables like CFLAGS are being used (fixes #818)

rebase

Use Clang 9.0.0 miscompilation fix for corresponding AppleClang version as well

As discussed on the original PR #2329, the "Apple Clang 11.0.3" that appears to be based the same LLVM release produces the same miscompilation of this file.

rebase

Add test for shgemm

* make building the bfloat16 BLAS functions conditional on BUILD_HALF

* pass the BUILD_HALF option to gensymbol

* Pass BUILD_HALF as a compiler define for dynamic_arch builds

Trivial fix for compiler warnings

This patch has Makefile changes to add test for shgemm which
compares sgemm and shgemm result.

rebase

Increase default BUFFER_SIZE on MIPS64

rebase

[WIP] Have CMAKE parse conditional lines in KERNEL files

Supports ifeq and ifneq, but requires both to have an else branch

Increase BUFFER_SIZE on MIPS32 to accomodate SGEMM requirements

in response to compile-time warning from #2551

rebase

Fix travis configuration and update CONTRIBUTORS.md

Increase POWER8 ZGEMM_R and use same R values for POWER9

fixes lapack-test zger failures seen in #2299 after application of my PR #2551

Quote getarch include paths in prebuild.cmake

rebase