... generation of ?neg_tcopy and ?laswp_ncopy files

Copied from alexkaratakis' PR #1295

2D thread distribution for multi-threaded GEMMs

Fix out-of-bounds memory accesses exposed by xccblat3 testcase

Save and restore VSX registers

...and does not appear to be needed even when it stays within the bounds of the array

CMake improvements

Variable thread count for multi-threaded GEMMs

Allows maximum use of available cores if one of M and N is small and the other is large.

Add trivial smoketest for xpotrf

m, n, and k can be set to arbitrary constants. A and B matrices can be transposed independently.

Rewrite NOFORTRAN conditionals

... so that they do not trigger accidentally when NOFORTRAN is empty/unset

Added mips I6500 core

Signed-off-by: Shivraj Patil <shivraj.patil@imgtec.com>

Add support for TARGET=ZARCH_GENERIC and TARGET=Z13

(Plain make) build system fixes for AIX

- retry fortran compiler test with aix-specific option if generic -m32/-m64 fails
- pass any custom ARFLAGS to lapack
- no addition of -m32/-m64 to the CFLAGS and FFLAGS on AIX

Fix cols/rows mixup in omatcopy 2nd step for BlasTrans cases

Equivalent of #1244 (issue #899) for the non-complex cases. Fixes #1289

Remove default FEXTRALIBS in NOFORTRAN case

Optimized standard Blas Level-1,2 (excluding nrm2 functions) for z13 (double precision). Issue 884

More canonical installation on Cygwin

Fix thread data races uncovered by gcc thread sanitizer

... as the "allocation" code jumped to now does UNLOCK_COMMAND instead of blas_unlock

* The DLL is named cygopenblas.dll, not libopenblas.dll
* The import lib (still called libopenblas.dll.a) is installed

Use in-place transform shortcut only if matrix is square

Fix coretype detection for Bay Trail Atom

My earlier PR #982 appears to have been incomplete in this regard - fixes #1285

Fix typos and bad if statements discovered in 0.2.20.