POWER10 Optimized GEMM kernels

address vs2019 C4293 warning

This patch introduces new optimized version of ZGEMM kernel
using power10 Matrix-Multiply Assist (MMA) feature introduced in
POWER ISA v3.1. This patch makes use of new POWER10 compute instructions
for matrix multiplication operation.

Tested on simulator and there are no new test failures.
Cycles count reduced by 30-50%  compared to POWER9 version depending on
M/N/K sizes.

This patch introduces new optimized version of SGEMM, CGEMM and DGEMM
using power10 Matrix-Multiply Assist (MMA) feature introduced in
POWER ISA v3.1. This patch makes use of new POWER10 compute instructions
for matrix multiplication operation.

Tested on simulator and there are no new test failures.
Cycles count reduced by 30-50%  compared to POWER9 version depending on
M/N/K sizes.
MMA GCC patch for reference:
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=8ee2640bfdc62f835ec9740278f948034bc7d9f1

rebase

AVX512 DGEMM TCOPY_16 Function

powerpc: Add support for future processor

rebase

Zarch fix gcc detection

cpp_thread_test: Change adjustment of concurrency on systems with <52 hw threads

The two test cases dgemv_tester and dgemm_tester accept the degree of
concurrency as command line argument (amongst others). Fail early if
value 0 has been specified, instead of later with less-clear symptoms.

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

... instead of (number of hw threads - 4) to avoid invalid numbers on
smaller systems. Currently, systems with 4 or fewer CPUs (e.g., small CI
VMs) would fail the test. Fixes one of the issues discussed in #2668

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

In gcc-7.1, the behavior of -dumpversion changed to be configured
at compile-time. On some distributions it only dumps the major version
(e.g., Ubuntu), so the current checks for the gcc minor version report
false negatives. As a replacement, gcc-7.1 introduced -dumpfullversion
which always prints the full version.

Update the gcc version detection in Makefile.system to employ
-dumpfullversion with gcc-7 and newer.

Posting this patch for discussion, since it emerged from discussions
around issue #2668 and PR #2669. It is not solving a problem right now,
but may be useful in the future.

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

... to bring unified gcc version detection with common variables to the
one remaining spot in Makefile.system.

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

Employ common variables for gcc version detection and fix the broken
check for gcc >= 5.2.
Fixes #2668

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

Fix spelling of flang option -Mrecursive, add -Kieee and workaround for AOCC optimizer bug

Update BLAS tests to what netlib 3.9.0 uses

Add missing exported symbols.

Respect predefined defaults for AR, AS, LD and RANLIB

Report selected DYNAMIC_ARCH kernel rather than one of its aliases in gotoblas_corename

replaces calculation of machine precision with call to epsilon intrinsic and removes the requirement for previous output files to be removed before rerunning tests

rebase

This is the initial patch to support build infrastructure
for POWER10 architecture.

fix INIT8x4 of SGEMM on Arm Cortex-A53

Fixes for compilation with flang binary release 20190329

Signed-off-by: ZhangDanfeng <467688405@qq.com>

rebase

Break out of potentially infinite rescaling loop in LAPACK xLARGV/xLARTG/xLARTGP

Small fixes for flang in general and the AMD AOCC version of it in particular