This reverts commit 2a669e79e1.

* With the Intel compiler on Linux, prefer ifort for the final link step 

icc has known problems with mixed-language builds that ifort can handle just fine. Fixes #1956

* Rename operands to put lda on the input/output constraint list

* Fix wrong constraints in inline assembly

for #2009

* Fix inline assembly constraints

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

* Fix inline assembly constraints

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

* Fix inline assembly constraints

* Fix inline assembly constraints

* Fix inline assembly constraints in Bulldozer TRSM kernels

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

* Correct range_n limiting

same bug as seen in #1388, somehow missed in corresponding PR #1389

* Allow multithreading TRMV again

revert workaround introduced for issue #1332 as the actual cause appears to be my incorrect fix from #1262 (see #1388)

* Fix error introduced during cleanup

* Reduce list of kernels in the dynamic arch build

to make compilation complete reliably within the 1h limit again

* init

* move fix to right place

* Fix missing -c option in AVX512 test

* Fix AVX512 test always returning false due to missing compiler option

* Make x86_32 imply NO_AVX2, NO_AVX512 in addition to NO_AVX

fixes #2033

* Keep xcode8.3 for osx BINARY=32 build

as xcode10 deprecated i386

* Make sure that AVX512 is disabled in 32bit builds

for #2033

* Improve handling of NO_STATIC and NO_SHARED

to avoid surprises from defining either as zero. Fixes #2035 by addressing some concerns from #1422

* init

* address warning introed with #1814 et al

* Restore locking optimizations for OpenMP case

restore another accidentally dropped part of #1468 that was missed in #2004 to address performance regression reported in #1461

* HiSilicon tsv110 CPUs optimization branch

add HiSilicon tsv110 CPUs  optimization branch

* add TARGET support for  HiSilicon tsv110 CPUs

* add TARGET support for HiSilicon tsv110 CPUs

* add TARGET support for HiSilicon tsv110 CPUs

* Fix module definition conflicts between LAPACK and ReLAPACK

for #2043

* Do not compile in AVX512 check if AVX support is disabled

xgetbv is function depends on NO_AVX being undefined - we could change that too, but that combo is unlikely to work anyway

* ctest.c : add __POWERPC__ for PowerMac

* Fix crash in sgemm SSE/nano kernel on x86_64

Fix bug #2047.

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

* param.h : enable defines for PPC970 on DarwinOS

fixes:
gemm.c: In function 'sgemm_':
../common_param.h:981:18: error: 'SGEMM_DEFAULT_P' undeclared (first use in this function)
 #define SGEMM_P  SGEMM_DEFAULT_P
                  ^

* common_power.h: force DCBT_ARG 0 on PPC970 Darwin

without this, we see
../kernel/power/gemv_n.S:427:Parameter syntax error
and many more similar entries

that relates to this assembly command
dcbt 8, r24, r18

this change makes the DCBT_ARG = 0
and openblas builds through to completion on PowerMac 970
Tests pass

* Make TARGET=GENERIC compatible with DYNAMIC_ARCH=1

for issue #2048

* make DYNAMIC_ARCH=1 package work on TSV110.

* make DYNAMIC_ARCH=1 package work on TSV110

* Add Intel Denverton

for #2048

* Add Intel Denverton

* Change 64-bit detection as explained in #2056

* Trivial typo fix

as suggested in #2022

* Disable the AVX512 DGEMM kernel (again)

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

* Use POSIX getenv on Cygwin

The Windows-native GetEnvironmentVariable cannot be relied on, as
Cygwin does not always copy environment variables set through Cygwin
to the Windows environment block, particularly after fork().

* Fix for #2063: The DllMain used in Cygwin did not run the thread memory
pool cleanup upon THREAD_DETACH which is needed when compiled with
USE_TLS=1.

* Also call CloseHandle on each thread, as well as on the event so as to not leak thread handles.

* AIX asm syntax changes needed for shared object creation

* power9 makefile. dgemm based on power8 kernel with following changes : 32x unrolled 16x4 kernel and 8x4 kernel using (lxv stxv butterfly rank1 update). improvement from 17 to 22-23gflops. dtrmm cases were added into dgemm itself

* Expose CBLAS interfaces for I?MIN and I?MAX

* Build CBLAS interfaces for I?MIN and I?MAX

* Add declarations for ?sum and cblas_?sum

* Add interface for ?sum (derived from ?asum)

* Add ?sum

* Add implementations of ssum/dsum and csum/zsum

as trivial copies of asum/zsasum with the fabs calls replaced by fmov to preserve code structure

* Add ARM implementations of ?sum

(trivial copies of the respective ?asum with the fabs calls removed)

* Add ARM64 implementations of ?sum

as trivial copies of the respective ?asum kernels with the fabs calls removed

* Add ia64 implementation of ?sum

as trivial copy of asum with the fabs calls removed

* Add MIPS implementation of ?sum

as trivial copy of ?asum with the fabs calls removed

* Add MIPS64 implementation of ?sum

as trivial copy of ?asum with the fabs replaced by mov to preserve code structure

* Add POWER implementation of ?sum

as trivial copy of ?asum with the fabs replaced by fmr to preserve code structure

* Add SPARC implementation of ?sum

as trivial copy of ?asum with the fabs replaced by fmov to preserve code structure

* Add x86 implementation of ?sum

as trivial copy of ?asum with the fabs calls removed

* Add x86_64 implementation of ?sum

as trivial copy of ?asum with the fabs calls removed

* Add ZARCH implementation of ?sum

as trivial copies of the respective ?asum kernels with the ABS and vflpsb calls removed

* Detect 32bit environment on 64bit ARM hardware

for #2056, using same approach as #2058

* Add cmake defaults for ?sum kernels

* Add ?sum

* Add ?sum definitions for generic kernel

* Add declarations for ?sum

* Add -lm and disable EXPRECISION support on *BSD

fixes #2075

* Add in runtime CPU detection for POWER.

* snprintf define consolidated to common.h

* Support INTERFACE64=1

* Add support for INTERFACE64 and fix XERBLA calls

1. Replaced all instances of "int" with "blasint"
2. Added string length as "hidden" third parameter in calls to fortran XERBLA

* Correct length of name string in xerbla call

* Avoid out-of-bounds accesses in LAPACK EIG tests

see https://github.com/Reference-LAPACK/lapack/issues/333

* Correct INFO=4 condition

* Disable reallocation of work array in xSYTRF

as it appears to cause memory management problems (seen in the LAPACK tests)

* Disable repeated recursion on Ab_BR in ReLAPACK xGBTRF

due to crashes in LAPACK tests

* sgemm/strmm

* Update Changelog with changes from 0.3.6

* Increment version to 0.3.7.dev

* Increment version to 0.3.7.dev

* Misc. typo fixes

Found via `codespell -q 3 -w -L ith,als,dum,nd,amin,nto,wis,ba -S ./relapack,./kernel,./lapack-netlib`

* Correct argument of CPU_ISSET for glibc <2.5

fixes #2104

* conflict resolve

* Revert reference/ fixes

* Revert Changelog.txt typos

* Disable the SkyLakeX DGEMMITCOPY kernel as well

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

* Disable DGEMMINCOPY as well for now

#1955

* init

* Fix errors in cpu enumeration with glibc 2.6

for #2114

* Change two http links to https

Closes #2109

* remove redundant code #2113

* Set up CI with Azure Pipelines

[skip ci]

* TST: add native POWER8 to CI

* add native POWER8 testing to
Travis CI matrix with ppc64le
os entry

* Update link to IBM MASS library, update cpu support status

* first try migrating one of the arm builds from travis

* fix tabbing in azure commands

* Update azure-pipelines.yml

take out offending lines (although stolen from https://github.com/conda-forge/opencv-feedstock azure-pipelines fiie)

* Update azure-pipelines.yml

* Update azure-pipelines.yml

* Update azure-pipelines.yml

* Update azure-pipelines.yml

* DOC: Add Azure CI status badge

* Add ARMV6 build to azure CI setup (#2122)

using aytekinar's Alpine image and docker script from the Travis setup

[skip ci]

* TST: Azure manylinux1 & clean-up

* remove some of the steps & comments
from the original Azure yml template

* modify the trigger section to use
develop since OpenBLAS primarily uses
this branch; use the same batching
behavior as downstream projects NumPy/
SciPy

* remove Travis emulated ARMv6 gcc build
because this now happens in Azure

* use documented Ubuntu vmImage name for Azure
and add in a manylinux1 test run to the matrix

[skip appveyor]

* Add NO_AFFINITY to available options on Linux, and set it to ON

to match the gmake default. Fixes second part of #2114

* Replace ISMIN and ISAMIN kernels on all x86_64 platforms (#2125)

* 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

* Move ARMv8 gcc build from Travis to Azure

* Move ARMv8 gcc build from Travis to Azure

* Update .travis.yml

* Test drone CI

* install make

* remove sudo

* Install gcc

* Install perl

* Install gfortran and add a clang job

* gfortran->gcc-gfortran

* Switch to ubuntu and parallel jobs

* apt update

* Fix typo

* update yes

* no need of gcc in clang build

* Add a cmake build as well

* Add cmake builds and print options

* build without lapack on cmake

* parallel build

* See if ubuntu 19.04 fixes the ICE

* Remove qemu armv8 builds

* arm32 build

* Fix typo

* TST: add SkylakeX AVX512 CI test

* adapt the C-level reproducer code for some
recent SkylakeX AVX512 kernel issues, provided
by Isuru Fernando and modified by Martin Kroeker,
for usage in the utest suite

* add an Intel SDE SkylakeX emulation utest run to
the Azure CI matrix; a custom Docker build was required
because Ubuntu image provided by Azure does not support
AVX512VL instructions

* Add option USE_LOCKING for single-threaded build with locking support

for calling from concurrent threads

* Add option USE_LOCKING for single-threaded build with locking support

* Add option USE_LOCKING for SMP-like locking in USE_THREAD=0 builds

* Add option USE_LOCKING but keep default settings intact

* Remove unrelated change

* Do not try ancient PGI hacks with recent versions of that compiler

should fix #2139

* Build and run utests in any case, they do their own checks for fortran availability

* Add softfp support in min/max kernels

fix for #1912

* Revert "Add softfp support in min/max kernels"

* Separate implementations of AMAX and IAMAX on arm

As noted in #1912 and comment on #1942, the combined implementation happens to "do the right thing" on hardfp, but cannot return both value and index on softfp where they would have to share the return register

* Ensure correct output for DAMAX with softfp

* Use generic kernels for complex (I)AMAX to support softfp

* improved zgemm power9 based on power8

* upload thread safety test folder

* hook up c++ thread safety test (main Makefile)

*  add c++ thread test option to Makefile.rule

* Document NO_AVX512 

for #2151

* sgemm pipeline improved, zgemm rewritten without inner packs, ABI lxvx v20 fixed with vs52

* Fix detection of AVX512 capable compilers in getarch

21eda8b5 introduced a check in getarch.c to test if the compiler is capable of
AVX512. This check currently fails, since the used __AVX2__ macro is only
defined if getarch itself was compiled with AVX2/AVX512 support. Make sure this
is the case by building getarch with -march=native on x86_64. It is only
supposed to run on the build host anyway.

* c_check: Unlink correct file

* power9 zgemm ztrmm optimized

* conflict resolve

* Add gfortran workaround for ABI violations in LAPACKE

for #2154 (see gcc bug 90329)

* Add gfortran workaround for ABI violations

for #2154 (see gcc bug 90329)

* Add gfortran workaround for potential ABI violation 

for #2154

* Update fc.cmake

* Remove any inadvertent use of -march=native from DYNAMIC_ARCH builds

from #2143, -march=native precludes use of more specific options like -march=skylake-avx512 in individual kernels, and defeats the purpose of dynamic arch anyway.

* Avoid unintentional activation of TLS code via USE_TLS=0

fixes #2149

* Do not force gcc options on non-gcc compilers

fixes compile failure with pgi 18.10 as reported on OpenBLAS-users

* Update Makefile.x86_64

* Zero ecx with a mov instruction

PGI assembler does not like the initialization in the constraints.

* Fix mov syntax

* new sgemm 8x16

* Update dtrmm_kernel_16x4_power8.S

* PGI compiler does not like -march=native

* Fix build on FreeBSD/powerpc64.

Signed-off-by: Piotr Kubaj <pkubaj@anongoth.pl>

* Fix build for PPC970 on FreeBSD pt. 1

FreeBSD needs DCBT_ARG=0 as well.

* Fix build for PPC970 on FreeBSD pt.2

FreeBSD needs those macros too.

* cgemm/ctrmm power9

* Utest needs CBLAS but not necessarily FORTRAN

* Add mingw builds to Appveyor config

* Add getarch flags to disable AVX on x86

(and other small fixes to match Makefile behaviour)

* Make disabling DYNAMIC_ARCH on unsupported systems work

needs to be unset in the cache for the change to have any effect

* Mingw32 needs leading underscore on object names

(also copy BUNDERSCORE settings for FORTRAN from the corresponding Makefile)

Quoting patch author amodra from #1078
Lots of issues here.
- The vsx regs weren't listed as clobbered.
- Poor choice of vsx regs, which along with the lack of clobbers led to
  trashing v0..v21 and fr14..fr23.  Ideally you'd let gcc choose all
  temp vsx regs, but asms currently have a limit of 30 i/o parms.
- Other regs were clobbered unnecessarily, seemingly in an attempt to
  clobber inputs, with gcc-7 complaining about the clobber of r2.
  (Changed inputs should be also listed as outputs or as an i/o.)
- "r" constraint used instead of "b" for gprs used in insns where the
  r0 encoding means zero rather than r0.
- There were unused asm inputs too.
- All memory was clobbered rather than hooking up memory outputs with
  proper memory constraints, and that and the lack of proper memory
  input constraints meant the asms needed to be volatile and their
  containing function noinline.
- Some parameters were being passed unnecessarily via memory.
- When a copy of a