Merge pull request #3315 from martin-frbg/changelog0317

[platform/upstream/openblas.git] / Changelog.txt

OpenBLAS ChangeLog
====================================================================
Version 0.3.17
 15-Jul-2021

common:
 - reverted the optimization of SGEMV_N/DGEMV_N for small input sizes
   and consecutive arguments as it led to stack overflows on x86_64
   with some operating systems (notably OSX and Windows)
 
 x86_64:
  - reverted the performance patch for SGEMV_T on AVX512 as it caused
    wrong results in some applications
    
 SPARC:
  - fixed compilation with compilers other than gcc
====================================================================
Version 0.3.16
 11-Jul-2021

common:
 - drastically reduced the stack size requirements for running the LAPACK
   testsuite (Reference-LAPACK PR 553)
 - fixed spurious test failures in the LAPACK testsuite (Reference-LAPACK
   PR 564)
 - expressly setting DYNAMIC_ARCH=0 no longer enables dynamic_arch mode 
 - improved performance of xGER, xSPR, xSPR2, xSYR, xSYR2, xTRSV, SGEMV_N 
   and DGEMV_N, for small input sizes and consecutive arguments
 - improved performance of xGETRF, xPORTF and xPOTRI for small input sizes
   by disabling multithreading
 - fixed installing with BSD versions of the "install" utility

RISCV:
 - fixed the implementation of xIMIN
 - improved the performance of DSDOT
 - fixed linking of the tests on C910V with current vendor gcc

POWER:
- fixed SBGEMM computation for some odd value inputs
- fixed compilation for PPCG4, PPC970, POWER3, POWER4 and POWER5

x86_64:
 - improved performance of SGEMV_N and SGEMV_T for small N on AVX512-capable cpus
 - worked around a miscompilation of ZGEMM/ZTRMM on Sandybridge with old gcc
   versions
 - fixed compilation with MS Visual Studio versions older than 2017
 - fixed macro name collision with winnt.h from the latest Win10 SDK
 - added cpu type autodetection for Intel Ice Lake SP
 - fixed cpu type autodetection for Intel Tiger Lake
 - added cpu type autodetection for recent Centaur/Zhaoxin models
 - fixed compilation with musl libc

ARM64:
- fixed compilation with gcc/gfortran on the Apple M1
- fixed linking of the tests on FreeBSD
- fixed missing restore of a register in the recently rewritten DNRM2 kernel
  for ThunderX2 and Neoverse N1 that could cause spurious failures in e.g.
  DGEEV
- added compiler optimization flags for the EMAG8180
- added initial support for Cortex A55

ARM:
- fixed linking of the tests on FreeBSD

====================================================================
Version 0.3.15
  2-May-2021

common:
 - imported improvements and bugfixes from Reference-LAPACK 3.9.1
 - imported LAPACKE interface fixes from Reference-LAPACK PRs 534 + 537
 - fixed a problem in the cpu detection of 0.3.14 that prevented cross-compilation
 - fixed a sequence problem in the generation of softlinks to the library in GMAKE

RISC V:
 - fixed compilation on RISCV (missing entry in getarch)
 - fixed a potential division by zero in CROTG and ZROTG

POWER:
 - fixed LAPACK testsuite failures seen with the NVIDIA HPC compiler
 - improved CGEMM, DGEMM and ZGEMM performance on POWER10
 - added an optimized ZGEMV kernel for POWER10
 - fixed a potential division by zero in CROTG and ZROTG

x86_64:
 - added support for Intel Control-flow Enforcement Technology (CET)
 - reverted the DOMATCOPY_RT code to the generic C version
 - fixed a bug in the AVX512 SGEMM kernel introduced in 0.3.14
 - fixed misapplication of -msse flag to non-SSE cpus in DYNAMIC_ARCH
 - added support for compilation of the benchmarks on older OSX versions
 - fix propagation of the NO_AVX512 option in CMAKE builds
 - fix compilation of the AVX512 SGEMM kernel with clang-cl on Windows
 - fixed compilation of the CTESTs with INTERFACE64=1 (random faults on OSX)
 - corrected the Haswell DROT kernel to require AVX2/FMA3 rather than AVX512

ARM:
 - fixed a potential division by zero in CROTG and ZROTG
 - fixed a potential overflow in IMATCOPY/ZIMATCOPY and the CTESTs

ARM64:
 - fixed spurious reads outside the array in the SGEMM tcopy macro
 - fixed a potential division by zero in CROTG and ZROTG
 - fixed a segmentation fault in DYNAMIC_ARCH builds (reappeared in 0.3.14)

MIPS
 - fixed a potential division by zero in CROTG and ZROTG
 - fixed a potential overflow in IMATCOPY/ZIMATCOPY and the CTESTs

MIPS64:
 - fixed a potential division by zero in CROTG and ZROTG

SPARC:
 - fixed a potential division by zero in CROTG and ZROTG

====================================================================
Version 0.3.14
 17-Mar-2021
 
 common:
        * Fixed a race condition on thread shutdown in non-OpenMP builds
        * Fixed custom BUFFERSIZE option getting ignored in gmake builds
        * Fixed CMAKE compilation of the TRMM kernels for GENERIC platforms
        * Added CBLAS interfaces for CROTG, ZROTG, CSROT and ZDROT
        * Improved performance of OMATCOPY_RT across all platforms
        * Changed perl scripts to use env instead of a hardcoded /usr/bin/perl
        * Fixed potential misreading of the GCC compiler version in the build scripts
        * Fixed convergence problems in LAPACK complex GGEV/GGES (Reference-LAPACK #477)
        * Reduced the stacksize requirements for running the LAPACK testsuite (Reference-LAPACK #335)

 RISCV:
        * Fixed compilation on RISCV (missing entry in getarch)
        
 POWER:
        * Fixed compilation for DYNAMIC_ARCH with clang and with old gcc versions
        * Added support for compilation on FreeBSD/ppc64le
        * Added optimized POWER10 kernels for SSCAL, DSCAL, CSCAL, ZSCAL
        * Added optimized POWER10 kernels for SROT, DROT, CDOT, SASUM, DASUM
        * Improved SSWAP, DSWAP, CSWAP, ZSWAP performance on POWER10
        * Improved SCOPY and CCOPY performance on POWER10
        * Improved SGEMM and DGEMM performance on POWER10
        * Added support for compilation with the NVIDIA HPC compiler

 x86_64:
        * Added an optimized bfloat16 GEMM kernel for Cooperlake
        * Added CPUID autodetection for Intel Rocket Lake and Tiger Lake cpus
        * Improved the performance of SASUM,DASUM,SROT,DROT on AMD Ryzen cpus
        * Added support for compilation with the NAG Fortran compiler
        * Fixed recognition of the AMD AOCC compiler
        * Fixed compilation for DYNAMIC_ARCH with clang on Windows
        * Added support for running the BLAS/CBLAS tests on Windows
        * Fixed signatures of the tls callback functions for Windows x64
        * Fixed various issues with fma intrinsics support handling 

 ARM:
        * Added support for embedded Cortex M targets via a new option EMBEDDED

 ARMV8:
        * Fixed the THUNDERX2T99 and NEOVERSEN1 DNRM2/ZNRM2 kernels for inputs with Inf
        * Added support for the DYNAMIC_LIST option
        * Added support for compilation with the NVIDIA HPC compiler
        * Added support for compiling with the NAG Fortran compiler

====================================================================
Version 0.3.13
 12-Dec-2020
 
 common:
        * Added a generic bfloat16 SBGEMV kernel
        * Fixed a potentially severe memory leak after fork in OpenMP builds
          that was introduced in 0.3.12
        * Added detection of the Fujitsu Fortran compiler
        * Added detection of the (e)gfortran compiler on OpenBSD
        * Added support for overriding the default name of the library independently
          from symbol suffixing in the gmake builds (already supported in cmake)

RISCV:
        * Added a RISC V port optimized for C910V

POWER:
        * Added optimized POWER10 kernels for SAXPY, CAXPY, SDOT, DDOT and DGEMV_N
        * Improved DGEMM performance on POWER10
        * Improved STRSM and DTRSM performance on POWER9 and POWER10
        * Fixed segmemtation faults in DYNAMIC_ARCH builds
        * Fixed compilation with the PGI compiler

x86:
        * Fixed compilation of kernels that require SSE2 intrinsics since 0.3.12
        
x86_64:
        * Added an optimized bfloat16 SBGEMV kernel for SkylakeX and Cooperlake
        * Improved the performance of SASUM and DASUM kernels through parallelization
        * Improved the performance of SROT and DROT kernels
        * Improved the performance of multithreaded xSYRK
        * Fixed OpenMP builds that use the LLVM Clang compiler together with GNU gfortran
          (where linking of both the LLVM libomp and GNU libgomp could lead to lockups or
          wrong results)
        * Fixed miscompilations by old gcc 4.6
        * Fixed misdetection of AVX2 capability in some Sandybridge cpus
        * Fixed lockups in builds combining DYNAMIC_ARCH with TARGET=GENERIC on OpenBSD

ARM64:
        * Fixed segmemtation faults in DYNAMIC_ARCH builds

MIPS:
        * Improved kernels for Loongson 3R3 ("3A") and 3R4 ("3B") models, including MSA
        * Fixed bugs in the MSA kernels for CGEMM, CTRMM, CGEMV and ZGEMV
        * Added handling of zero increments in the MSA kernels for SSWAP and DSWAP
        * Added DYNAMIC_ARCH support for MIPS64 (currently Loongson3R3/3R4 only)

SPARC:
        * Fixed building 32 and 64 bit SPARC kernels with the SolarisStudio compilers

====================================================================
Version 0.3.12
 24-Oct-2020

common:
        * Fixed missing BLAS/LAPACK functions (inadvertently dropped during
          the build system restructuring)
        * Fixed argument conversion macro in LAPACKE_zgesvdq (LAPACK #458)

POWER:
        * Added optimized SCOPY/CCOPY kernels for POWER10
        * Increased and unified the default size of the GEMM BUFFER
        * Fixed building for POWER10 in DYNAMIC_ARCH mode
        * POWER10 compatibility test now checks binutils version as well
        * Cleaned up compiler warnings

x86_64:
        * corrected compiler version checks for AVX2 compatibility
        * added compiler option -mavx2 for building with flang
        * fixed direct SGEMM pathway for small matrix sizes (broken by
          the code refactoring in 0.3.11)
        * fixed unhandled partial register clobbers in several kernels
          for AXPY,DOT,GEMV_N and GEMV_T flagged by gcc10 tree-vectorizer

ARMV8:
        * improved Apple Vortex support to include cross-compiling

====================================================================
Version 0.3.11
 17-Oct-2020

common:
        * API change:
          the newly added BFLOAT16 functions were renamed to use the
          letter "B" instead of "H" to avoid potential confusion with
          the IEEE "half precision float" type, i.e. the 0.3.10
          SHGEMM is now SBGEMM and the corresponding build option
          was changed from "BUILD_HALF" to "BUILD_BFLOAT16".
        * Reduced the default BLAS3_MEM_ALLOC_THRESHOLD (used as an upper
          limit for placing temporary arrays on the stack) to be compatible
          with a stack size of 1mb (as imposed by the JAVA runtime library) 
        * Added mixed-precision dot function SBDOT and utility functions
          shstobf16, shdtobf16, sbf16tos and dbf16tod to convert between
          single or double precision float arrays and bfloat16 arrays
        * Fixed prototypes of LAPACK_?ggsvp and LAPACK_?ggsvd functions
          in lapack.h
        * Fixed underflow and rounding errors in LAPACK SLANV2 and DLANV2
          (causing miscalculations in e.g. SHSEQR/DHSEQR, LAPACK issue #263)
        * Fixed workspace calculation in LAPACK ?GELQ (LAPACK issue #415)
        * Fixed several bugs in the LAPACK testsuite
        * Improved performance of TRMM and TRSM for certain problem sizes
        * Fixed infinite recursions and workspace miscalculations in ReLAPACK
        * CMAKE builds no longer require pkg-config for creating the .pc file
        * Makefile builds no longer misread NO_CBLAS=0 or NO_LAPACK=0 as 
          enabling these options
        * Fixed detection of gfortran when invoked through an mpi wrapper
        * Improve thread reinitialization performance with OpenMP after a fork 
        * Added support for building only the subset of the library required
          for a particular precision by specifying BUILD_SINGLE, BUILD_DOUBLE
        * Optional function name prefixes and suffixes are now correctly
          reflected in the generated cblas.h
        * Added CMAKE build support for the LAPACK and multithreading tests

POWER:
        * Added optimized support for POWER10
        * Added support for compiling for POWER8 in 32bit mode
        * Added support for compilation with LLVM/clang
        * Added support for compilation with NVIDIA/PGI compilers
        * Fixed building on big-endian POWER8
        * Fixed miscompilation of ZDOTC by gcc10
        * Fixed alignment errors in the POWER8 SAXPY kernel
        * Improved CPU detection on AIX
        * Supported building with older compilers on POWER9

x86_64:
        * Added support for Intel Cooperlake
        * Added autodetection of AMD Renoir/Matisse/Zen3 cpus
        * Added autodetection of Intel Comet Lake cpus
        * Reimplemented ?sum, ?dot and daxpy using universal intrinsics
        * Reset the fpu state before using the fpu on Windows as a workaround
          for a problem introduced in Windows 10 build 19041 (a.k.a. SDK 2004)
        * Fixed potentially undefined behaviour in the dot and gemv_t kernels
        * Fixed a potential segmentation fault in DYNAMIC_ARCH builds
        * Fixed building for ZEN with PGI/NVIDIA and AMD AOCC compilers
        
ARMV7:
        * Fixed cpu detection on BSD-like systems

ARMV8:
        * Added preliminary support for Apple Vortex cpus
        * Added support for the Cavium ThunderX3T110 cpu
        * Fixed cpu detection on BSD-like systems
        * Fixed compilation in -std=C18 mode

IBM Z:
        * Added support for compiling with the clang compiler
        * Improved GEMM performance on Z14

====================================================================
Version 0.3.10
 14-Jun-2020

common:
        * Improved thread locking behaviour in blas_server and parallel getrf                         
        * Imported bugfix 394 from LAPACK (spurious reference to "XERBL"
          due to overlong lines)
        * Imported bugfix 403 from LAPACK (compile option "recursive" required
          for correctness with Intel and PGI)
        * Imported bugfix 408 from LAPACK (wrong scaling in ZHEEQUB)
        * Imported bugfix 411 from LAPACK (infinite loop in LARGV/LARTG/LARTGP)
        * Fixed mismatches between BUFFERSIZE and GEMM_UNROLL parameters that
          could lead to crashes at large matrix sizes  
        * Restored internal soname in dynamic libraries on FreeBSD and Dragonfly 
        * Added API (openblas_setaffinity) to set the thread affinity on Linux
        * Added initial infrastructure for half-precision floating point 
          (bfloat16) support with a generic implementation of SHGEMM     
        * Added CMAKE build system support for building the cblas_Xgemm3m
          functions
        * Fixed CMAKE support for building in a path with embedded spaces
        * Fixed CMAKE (non)handling of NO_EXPRECISION and MAX_STACK_ALLOC
        * Fixed GCC version detection in the Makefiles
        * Allowed overriding the names of AR, AS and LD in Makefile builds

POWER:
        * Fixed big-endian POWER8 ELFv2 builds on FreeBSD
        * Fixed GCC version checks and DYNAMIC_ARCH builds on POWER9
        * Fixed CMAKE build support for POWER9
        * fixed a potential race condition in the thread buffer allocation
        * Worked around LAPACK test failures on PPC G4

MIPS:
        * Fixed a potential race condition in the thread buffer allocation
        * Added support for MIPS 24K/24KE family based on P5600 kernels

MIPS64:
        * fixed a potential race condition in the thread buffer allocation
        * Added TARGET=GENERIC

ARMV7:
        * Fixed a race condition in the thread buffer allocation

ARMV8:
        * Fixed a race condition in the thread buffer allocation
        * Fixed zero initialisation in the assembly for SGEMM and DGEMM BETA
        * Improved performance of the ThunderX2 DAXPY kernel
        * Added an optimized SGEMM kernel for Cortex A53    
        * Fixed Makefile support for INTERFACE64 (8-byte integer)

x86_64:
        * Fixed a syntax error in the CMAKE setup for SkylakeX
        * Improved performance of STRSM on Haswell, SkylakeX and Ryzen
        * Improved SGEMM performance on SGEMM for workloads with ldc a
          multiple of 1024
        * Improved DGEMM performance on Skylake X
        * Fixed unwanted AVX512-dependency of SGEMM in DYNAMIC_ARCH
          builds created on SkylakeX
        * Removed data alignment requirement in the SSE2 copy kernels
          that could cause spurious crashes
        * Added a workaround for an optimizer bug in AppleClang 11.0.3
        * Fixed LAPACK test failures due to wrong options for Intel Fortran
        * Fixed compilation and LAPACK test results with recent Flang
          and AMD AOCC
        * Fixed DYNAMIC_ARCH builds with CMAKE on OS X
        * Fixed missing exports of cblas_i?amin, cblas_i?min, cblas_i?max,
          cblas_?sum, cblas_?gemm3m in the shared library on OS 
        * Fixed reporting of cpu name in DYNAMIC_ARCH builds (would sometimes
          show the name of an older generation chip supported by the same kernels)

IBM Z:
        * Improved performance of SGEMM/STRMM and DGEMM/DTRMM on Z14

====================================================================
Version 0.3.9
 1-Mar-2020
 
 common:
        * Fixed a miscompilation of the GETRF functions with CMAKE
        * Imported bugfix 390 from LAPACK (missing NaN propagation in xCOMBSSQ)
        * The size of the memory buffer used for splitting GEMM tasks across
          multiple threads can now be configured in the build system.

POWER:
        * Fixed several compilation problems related to endianness
          and ELF version on POWER8 and POWER9
        * Fixed use of the absolute value IAMIN/IAMAX instead of IMIN/IMAX
        * Fixed a race condition in the level3 blas code
        
MIPS64:
        * Fixed use of the absoltute value IAMIN/IAMAX instead of IMIN/IMAX
        
ARMV7:
        * Fixed a race condition in the level3 blas code
        * Fixed compilation on Android
ARMV8:
        * Added support for Ampere EMAG8180
        * Added support for Neoverse N1
        * Improved performance of the blas_lock function
        * Fixed a race condition in the level3 blas code
        * Fixed a performance regression on TSV110-based servers

x86_64:
        * Fixed a long-standing error with undeclared register overwrites
          in the DSCAL microkernel for HASWELL,SKYLAKEX and ZEN
        * Fixed a long-standing bug in the SSE implementation of IAMAX
        * Fixed a CMAKE build failure with DYNAMIC_ARCH
        * Fixed cpu autodetection of Goldmont+, Cannon Lake and Ice Lake
        * Fixed a compilation failure on OSX with compiler name containing dash
        * Fixed compilation with MinGW on SkylakeX
        * Improved speed of the AVX512 GEMM3M kernel on SkylakeX
        * Added an AVX512 STRMM kernel for SkylakeX
        * Improved GEMM performance on Haswell and Zen

zarch:
        * fixed compilation of the DYNAMIC_ARCH code
        
====================================================================
Version 0.3.8
 9-Feb-2020

common: 
`       * LAPACK has been updated to 3.9.0 (plus patches up to 
          January 2nd, 2020)
        * CMAKE support has been improved in several areas including
          cross-compilation
        * a thread race condition in the GEMM3M kernels was resolved
        * the "generic" (plain C) gemm beta kernel used by many targets
          has been sped up
        * an optimized version of the LAPACK trtrs functions has been added
        * an incompatibilty between the LAPACK tests and the OpenBLAS
          implementation of XERBLA was resolved, removing the numerous
          warnings about wrong error exits in the former 
        * support for NetBSD has been added
        * support for compilation with g95 and non-GNU versions of ld
          has been improved
        * support for compilation with (upcoming) gcc 10 has been added

POWER:
        * worked around miscompilation of several POWER8 and POWER9 
          kernels by older versions of gcc
        * added support for big-endian POWER8 and for compilation on AIX
        * corrected bugs in the big-endian support for PPC440 and PPC970
        * DYNAMIC_ARCH support is now available in CMAKE builds as well

ARMV8:
        * performance of DGEMM_BETA and SGEMM_NCOPY has been improved
        * compilation for 32bit works again 
        * performance of the RPCC function has been improved
        * improved performance on small systems
        * DYNAMIC_ARCH support is now available in CMAKE builds as well
        * cross-compilation from OSX to IOS was simplified
 
x86_64:
        * a new AVX512 DGEMM kernel was added and the AVX512 SGEMM kernel
          was significantly improved
        * optimized AVX512 kernels for CGEMM and ZGEMM have been added
        * AVX2 kernels for STRMM, SGEMM, and CGEMM have been significantly
          sped up and optimized CGEMM3M and ZGEMM3M kernels have been added 
        * added support for QEMU virtual cpus
        * a compilation problem with PGI and SUN compilers was fixed
        * Intel "Goldmont plus" is now autodetected
        * a potential crash on program exit on MS Windows has been fixed

x86:
        * an unwanted case sensitivity in the implementation of LSAME
          on older 32bit AMD cpus was fixed

zarch:
        * Z15 is now supported as Z14
        * DYNAMIC_ARCH is now available on ZARCH as well

====================================================================
Version 0.3.7
11-Aug 2019

common:
  * having the gmake special variables TARGET_ARCH or TARGET_MACH
    defined no longer causes build failures in ctest or utest
  * defining NO_AFFINITY or USE_TLS to 0 in gmake builds no longer
    has the same effect as setting them to 1
  * a new test program was added to allow checking the library for
    thread safety
  * a new option USE_LOCKING was added to ensure thread safety when
    OpenBLAS itself is built without multithreading but will be 
    called from multiple threads.
  * a build failure on Linux with glibc versions earlier than 2.5
    was fixed
  * a runtime error with CPU enumeration (and NO_AFFINITY not set)
    on glibc 2.6 was fixed
  * NO_AFFINITY was added to the CMAKE options (and defaults to being
    active on Linux, as in the gmake builds)

x86_64:
  * the build-time logic for detection of AVX512 availability in
    the processor and compiler was fixed
  * gmake builds on OSX now set the internal name of the library to 
    libopenblas.0.dylib (consistent with CMAKE)
  * the Haswell DGEMM kernel received a significant speedup through
    improved prefetch and load instructions
  * performance of DGEMM, DTRMM, DTRSM and ZDOT on Zen/Zen2 was markedly
    increased by avoiding vpermpd instructions
  * the SKYLAKEX (AVX512) DGEMM helper functions have now been disabled
    to fix remaining errors in DGEMM, DSYMM and DTRMM

POWER:
  * added support for building on FreeBSD/powerpc64 and FreeBSD/ppc970
  * added optimized kernels for POWER9 SGEMM and STRMM

ARMV7:
  * fixed the softfp implementations of xAMAX and IxAMAX
  * removed the predefined -march= flags on both ARMV5 and ARMV6 as
    they were appropriate for only a subset of platforms

====================================================================
Version 0.3.6
29-Apr-2019

common:
        * the build tools now check that a given cpu TARGET is actually valid
        * the build-time check of system features (c_check) has been made
          less dependent on particular perl features (this should mainly
          benefit building on Windows)
        * several problem with the ReLAPACK integration were fixed,
          including INTERFACE64 support and building a shared library
        * building with CMAKE on BSD systems was improved
        * a non-absolute SUM function was added based on the
          existing optimized code for ASUM
        * CBLAS interfaces to the IxMIN and IxMAX functions were added
        * a name clash between LAPACKE and BOOST headers was resolved
        * CMAKE builds with OpenMP failed to include the appropriate getrf_parallel
          kernels
        * a crash on thread (key) deletion with the USE_TLS=1 memory management
          option was fixed
        * restored several earlier fixes, in particular for OpenMP performance,
          building on BSD, and calling fork on CYGWIN, which had inadvertently
          been dropped in the 0.3.3 rewrite of the memory management code.

x86_64:
        * the AVX512 DGEMM kernel has been disabled again due to unsolved problems
        * building with old versions of MSVC was fixed
        * it is now possible to build a static library on Windows with CMAKE
        * accessing environment variables on CYGWIN at run time was fixed
        * the CMAKE build system now recognizes 32bit userspace on 64bit hardware
        * Intel "Denverton" atom and Hygon "Dhyana" zen CPUs are now autodetected
        * building for DYNAMIC_ARCH with a DYNAMIC_LIST of targets is now supported
          with CMAKE as well
        * building for DYNAMIC_ARCH with GENERIC as the default target is now supported
        * a buffer overflow in the SSE GEMM kernel for Intel Nano targets was fixed
        * assembly bugs involving undeclared modification of input operands were fixed
          in the AXPY, DOT, GEMV, GER, SCAL, SYMV and TRSM microkernels for Nehalem,
          Sandybridge, Haswell, Bulldozer and Piledriver. These would typically cause
          test failures or segfaults when compiled with recent versions of gcc from 8 onward.
        * a similar bug was fixed in the blas_quickdivide code used to split workloads
          in most functions
        * a bug in the IxMIN implementation for the GENERIC target made it return the result of IxMAX
        * fixed building on SkylakeX systems when either the compiler or the (emulated) operating
          environment does not support AVX512
        * improved GEMM performance on ZEN targets

x86:
        * build failures caused by the recently added checks for AVX512 were fixed
        * an inline assembly bug involving undeclared modification of an input argument was
          fixed in the blas_quickdivide code used to split workloads in most functions
        * a bug in the IMIN implementation for the GENERIC target made it return the result of IMAX

MIPS32:
        * a bug in the IMIN implementation made it return the result of IMAX

POWER:
        * single precision BLAS1/2 functions have received optimized POWER8 kernels
        * POWER9 is now a separate target, with an optimized DGEMM/DTRMM kernel
        * building on PPC970 systems under OSX Leopard or Tiger is now supported
        * out-of-bounds memory accesses in the gemm_beta microkernels were fixed
        * building a shared library on AIX is now supported for POWER6
        * DYNAMIC_ARCH support has been added for POWER6 and newer

ARMv7:
        * corrected xDOT behaviour with zero INC_X or INC_Y
        * a bug in the IMIN implementation made it return the result of IMAX

ARMv8:
        * added support for HiSilicon TSV110 cpus
        * the CMAKE build system now recognizes 32bit userspace on 64bit hardware
        * cross-compilation with CMAKE now works again
        * a bug in the IMIN implementation made it return the result of IMAX
        * ARMV8 builds with the BINARY=32 option are now automatically handled as ARMV7

IBM Z:
        * optimized microkernels for single precicion BLAS1/2 functions have been added
          for both Z13 and Z14

====================================================================
Version 0.3.5
31-Dec-2018

common:
        * loop unrolling in TRMV has been enabled again.
        * A domain error in the thread workload distribution for SYRK
          has been fixed.
        * gmake builds will now automatically add -fPIC to the build
          options if the platform requires it.
        * a pthreads key leakage (and associate crash on dlclose) in
          the USE_TLS codepath was fixed.
        * building of the utest cases on systems that do not provide
          an implementation of complex.h was fixed.
          
x86_64:
        * the SkylakeX code was changed to compile on OSX.
        * unwanted application of the -march=skylake-avx512 option
          to the common code parts of a DYNAMIC_ARCH build was fixed.
        * improved performance of SGEMM for small workloads on Skylake X.
        * performance of SGEMM and DGEMM was improved on Haswell.

ARMV8:
        * a configuration error that broke the CNRM2 kernel was corrected.
        * compilation of the GEMM kernels with CMAKE was fixed.
        * DYNAMIC_ARCH builds are now available with CMAKE as well.
        * using CMAKE for cross-compilation to the new cpu TARGETs
          introduced in 0.3.4 now works.
          
POWER:
        * a problem in cpu autodetection for AIX has been corrected.
        
====================================================================
Version 0.3.4
02-Dec-2018

common:
        * the new, experimental thread-local memory allocation had 
          inadvertently been left enabled for gmake builds in 0.3.3
          despite the announcement. It is now disabled by default, and
          single-threaded builds will keep using the old allocator even
          if the USE_TLS option is turned on.
        * OpenBLAS will now provide enough buffer space for at least 50
          threads by default.
        * The output of openblas_get_config() now contains the version
          number.
        * A serious thread safety bug in GEMV operation with small M and
          large N size has been fixed.
        * The code will now automatically call blas_thread_init after a
          fork if needed before handling a call to openblas_set_num_threads
        * Accesses to parallelized level3 functions from multiple callers
          are now serialized to avoid thread races (unless using OpenMP).
          This should provide better performance than the known-threadsafe
          (but non-default) USE_SIMPLE_THREADED_LEVEL3 option.
        * When building LAPACK with gfortran, -frecursive is now (again)
          enabled by default to ensure correct behaviour.
        * The OpenBLAS version cblas.h now supports both CBLAS_ORDER and
          CBLAS_LAYOUT as the name of the matrix row/column order option.
        * Externally set LDFLAGS are now passed through to the final compile/link
          steps to facilitate setting platform-specific linker flags.
        * A potential race condition during the build of LAPACK (that would 
          usually manifest itself as a failure to build TESTING/MATGEN) has been 
          fixed.
        * xHEMV has been changed to stay single-threaded for small input sizes
          where the overhead of multithreading exceeds any possible gains
        * CSWAP and ZSWAP have been limited to a single thread except on ARMV8 or
          ThunderX hardware with sizable input.
        * Linker flags for the PGI compiler have been updated
        * Behaviour of AXPY with zero increments is now handled in the C interface,
          correcting the result on at least Intel Atom.
        * The result matrix from calling SGELSS with an all-zero input matrix is 
          now zeroed completely.
          
x86_64:
        * Autodetection of AMD Ryzen2 has been fixed (again).
        * CMAKE builds now support labeling of an INTERFACE64=1 build of
          the library with the _64 suffix.
        * AVX512 version of DGEMM has been added and the AVX512 SGEMM kernel
          has been sped up by rewriting with C intrinsics
        * Fixed compilation on RHEL5/CENTOS5 (issue with typename __WAIT_STATUS)
        
POWER:
        * added support for building on AIX (with gcc and GNU tools from AIX Toolbox).
        * CPU type detection has been implemented for AIX.
        * CPU type detection has been fixed for NETBSD.
        
MIPS64:
        * AXPY on LOONGSON3A has been corrected to pass "zero increment" utest.
        * DSDOT on LOONGSON3A has been fixed.
        * the SGEMM microkernel has been hardened against potential data loss.
        
ARMV8:
        * DYNAMic_ARCH support is now available for 64bit ARM
        * cross-compiling for ARMV8 under iOS now works.
        * cpu-specific code has been rearranged to make better use of both
          hardware commonalities and model-specific compiler optimizations.
        * XGENE1 has been removed as a TARGET, superseded by the improved generic
          ARMV8 support.
        
ARMV7:
        * Older assembly mnemonics have been converted to UAL form to allow
          building with clang 7.0
        * Cross compiling LAPACKE for Android has been fixed again (broken by
          update to LAPACK 3.7.0 some while ago).  
          
====================================================================
Version 0.3.3
31-Aug-2018

common:
        * thread memory allocation has been switched back to the method
          used before version 0.3.1 due to unexpected problems caused by
          the new code under some circumstances. A new compile-time option
          USE_TLS has been added to enable the new code, and it is hoped
          that this can become the default again in the next version.
        * LAPAck PR272 has been integrated, which fixes spurious errors
          in DSYEVR and related functions caused by missing conversion 
          from ILAENV to ILAENV_2STAGE in several _2stage routines.
        * the cmake-generated OpenBLASConfig.cmake now uses correct case
          for the name of the library
        * added support for Haiku OS  

x86_64:
        * added AVX512 implementations of SDOT, DDOT, SAXPY, DAXPY,
          DSCAL, DGEMVN and DSYMVL 
        * added a workaround for a cygwin issue that prevented compilation
          of AVX512 code
          
IBM Z:
        * added autodetection of Z14
        * fixed TRMM errors in the generic target
        
====================================================================
Version 0.3.2
30-Jul-2018

common:
        * fixes for regressions caused by the rewrite of the thread
          initialization code in 0.3.1

POWER:
        * fixed cpu autodetection for the BSDs

MIPS64:
        * fixed utest errors in AXPY, DSDOT, ROT and SWAP

x86_64:
        * added autodetection of AMD Ryzen 2
        * fixed build with older versions of MSVC

====================================================================
Version 0.3.1
01-Jul-2018

common:
        * rewritten thread initialization code with significantly reduced overhead
        * added CBLAS interfaces to the IxAMIN BLAS extension functions
        * fixed the lapack-test target
        * CMAKE builds now create an OpenBLASConfig.cmake file
        * ZAXPY now uses a single thread for small input sizes
        * the LAPACK code was updated from Reference-LAPACK/lapack#253
          (fixing LAPACKE interfaces to Aasen's functions)

POWER:
        * corrected CROT and ZROT behaviour with zero INC_X

ARMV7:
        * corrected xDOT behaviour with zero INC_X or INC_Y

x86_64:
        * retired some older targets of DYNAMIC_ARCH builds to a new option DYNAMIC_OLDER,
          this affects PENRYN,DUNNINGTON,OPTERON,OPTERON_SSE3,BOBCAT,ATOM and NANO
          (which will still be supported via the slower PRESCOTT kernels when this option is not set)
        * added an option DYNAMIC_LIST that (used in conjunction with DYNAMIC_ARCH) allows to 
          specify the list of x86_64 targets to include. Any target not on the list will be supported 
          by the Sandybridge or Nehalem kernels if available, or by Prescott.
        * improved SWITCH_RATIO on Haswell for increased GEMM throughput
        * added initial support for Intel Skylake X, including an AVX512 SGEMM kernel
        * added autodetection of Intel Cannon Lake series as Skylake X
        * added a default L2 cache size for hypervisors that return zero here (Chromebook)
        * fixed a name clash with recent Windows10 headers that broke the build with (at least)
          recent mingw from MSYS2
        * fixed a link error in mixed clang/gfortran builds with OpenMP
        * updated the OSX deployment target to 10.8
        * switched on parallel make for builds on MS Windows by default

x86:
        * fixed SSWAP and DSWAP behaviour with zero INC_X and INC_Y

====================================================================
Version 0.3.0
23-May-2108

common:
        * fixed some more thread race and locking bugs
        * added preliminary support for calling an OpenMP build of the library from multiple threads
        * removed performance impact of thread locks added in 0.2.20 on OpenMP code
        * general code cleanup 
        * optimized DSDOT implementation
        * improved thread distribution for GEMM
        * corrected IMATCOPY/OMATCOPY implementation
        * fixed out-of-bounds accesses in the multithreaded xBMV/xPMV and SYMV implementations
        * cmake build improvements
        * pkgconfig file now contains build options
        * openblas_get_config() now reports USE_OPENMP and NUM_THREADS settings used for the build
        * corrections and improvements for systems with more than 64 cpus
        * LAPACK code updated to 3.8.0 including later fixes
        * added ReLAPACK, a recursive implementation of several LAPACK functions
        * Rewrote ROTMG to handle cases that the netlib code failed to address
        * Disabled (broken) multithreading code for xTRMV
        * corrected prototypes of complex CBLAS functions to make our cblas.h match the generally accepted standard
        * shared memory access failures on startup are now handled more gracefully
        * restored utests from earlier releases (and made them pass on all affected systems)

SPARC:
        * several fixes for cpu autodetection

POWER:
        * corrected vector register overwriting in several Power8 kernels
        * optimized additional BLAS functions

ARM:
        * added support for CortexA53 and A72 
        * added autodetection for ThunderX2T99
        * made most optimized kernels the default for generic ARMv8 targets 

x86_64:
        * parallelized DDOT kernel for Haswell
        * changed alignment directives in assembly kernels to boost performance on OSX
        * fixed register handling in the GEMV microkernels (bug exposed by gcc7)
        * added support for building on OpenBSD and Dragonfly 
        * updated compiler options to work with Intel release 2018
        * support fully optimized build with clang/flang on Microsoft Windows
        * fixed building on AIX

IBM Z:
        * added optimized BLAS 1/2 functions

MIPS:
        * fixed cpu autodetection helper code
        * added mips32 1004K cpu (Mediatek MT7621 and similar SoC)
        * added mips64 I6500 cpu

====================================================================
Version 0.2.20
24-Jul-2017

common:
        * Improved CMake support
        * Fixed several thread race and locking bugs
        * Fixed default LAPACK optimization level
        * Updated LAPACK to 3.7.0
        * Added ReLAPACK (https://github.com/HPAC/ReLAPACK, make BUILD_RELAPACK=1)

POWER:
        * Optimizations for Power9
        * Fixed several Power8 assembly bugs

ARM:
        * New optimized Vulcan and ThunderX2T99 targets
        * Support for ARMV7 SOFT_FP ABI (make ARM_SOFTFP_ABI=1)
        * Detect all cpu cores including offline ones
        * Fix compilation with CLANG
        * Support building a shared library for Android

MIPS:
        * Fixed several threading issues
        * Fix compilation with CLANG

x86_64:
        * Detect Intel Bay Trail and Apollo Lake
        * Detect Intel Sky Lake and Kaby Lake
        * Detect Intel Knights Landing
        * Detect AMD A8, A10, A12 and Ryzen
        * Support 64bit builds with Visual Studio
        * Fix building with Intel and PGI compilers
        * Fix building with MINGW and TDM-GCC
        * Fix cmake builds for Haswell and related cpus
        * Fix building for Sandybridge with CLANG 3.9
        * Add support for the FLANG compiler

IBM Z:
        * New target z13 with BLAS3 optimizations

====================================================================
Version 0.2.19
1-Sep-2016
common:
        * Improved cross compiling.
        * Fix the bug on musl libc.

POWER:
        * Optimize BLAS on Power8
        * Fixed Julia+OpenBLAS bugs on Power8

MIPS:
        * Optimize BLAS on MIPS P5600 and I6400 (Thanks, Shivraj Patil, Kaustubh Raste)

ARM:
        * Improved on ARM Cortex-A57. (Thanks, Ashwin Sekhar T K)


====================================================================
Version 0.2.18
12-Apr-2016
common:
        * If you set MAKE_NB_JOBS flag less or equal than zero,
          make will be without -j.

x86/x86_64:
        * Support building Visual Studio static library. (#813, Thanks, theoractice)
        * Fix bugs to pass buidbot CI tests (http://build.openblas.net)

ARM:
        * Provide DGEMM 8x4 kernel for Cortex-A57 (Thanks, Ashwin Sekhar T K)

POWER:
        * Optimize S and C BLAS3 on Power8
        * Optimize BLAS2/1 on Power8

====================================================================
Version 0.2.17
20-Mar-2016
common:
        * Enable BUILD_LAPACK_DEPRECATED=1 by default.

====================================================================
Version 0.2.16
15-Mar-2016
common:
        * Avoid potential getenv segfault. (#716)
        * Import LAPACK svn bugfix #142-#147,#150-#155

x86/x86_64:
        * Optimize c/zgemv for AMD Bulldozer, Piledriver, Steamroller
        * Fix bug with scipy linalg test.

ARM:
        * Improve DGEMM for ARM Cortex-A57. (Thanks, Ashwin Sekhar T K)

POWER:
        * Optimize D and Z BLAS3 functions for Power8.

====================================================================
Version 0.2.16.rc1
23-Feb-2016
common:
        * Upgrade LAPACK to 3.6.0 version.
          Add BUILD_LAPACK_DEPRECATED option in Makefile.rule to build
          LAPACK deprecated functions.
        * Add MAKE_NB_JOBS option in Makefile.
          Force number of make jobs.This is particularly
          useful when using distcc. (#735. Thanks, Jerome Robert.)
        * Redesign unit test. Run unit/regression test at every build (Travis-CI and Appveyor).
        * Disable multi-threading for small size swap and ger. (#744. Thanks, Jerome Robert)
        * Improve small zger, zgemv, ztrmv using stack alloction (#727. Thanks, Jerome Robert)
        * Let openblas_get_num_threads return the number of active threads. 
          (#760. Thanks, Jerome Robert)
        * Support illumos(OmniOS). (#749. Thanks, Lauri Tirkkonen)
        * Fix LAPACK Dormbr, Dormlq bug. (#711, #713. Thanks, Brendan Tracey)
        * Update scipy benchmark script. (#745. Thanks, John Kirkham)

x86/x86_64:
        * Optimize trsm kernels for AMD Bulldozer, Piledriver, Steamroller.
        * Detect Intel Avoton.
        * Detect AMD Trinity, Richland, E2-3200.
        * Fix gemv performance bug on Mac OSX Intel Haswell.
        * Fix some bugs with CMake and Visual Studio

ARM:
        * Support and optimize Cortex-A57 AArch64.
          (#686. Thanks, Ashwin Sekhar TK)
        * Fix Android build on ARMV7 (#778. Thanks, Paul Mustiere)
        * Update ARMV6 kernels.

POWER:
        * Fix detection of POWER architecture
          (#684. Thanks, Sebastien Villemot)

====================================================================
Version 0.2.15
27-Oct-2015
common:
        * Support cmake on x86/x86-64. Natively compiling on MS Visual Studio.
          (experimental. Thank Hank Anderson for the initial cmake porting work.)
          
          On Linux and Mac OSX, OpenBLAS cmake supports assembly kernels.
          e.g. cmake .
               make
               make test (Optional)

          On Windows MS Visual Studio, OpenBLAS cmake only support C kernels.
          (OpenBLAS uses AT&T style assembly, which is not supported by MSVC.)
          e.g. cmake -G "Visual Studio 12 Win64" .
               Open OpenBLAS.sln and build.
          
        * Enable MAX_STACK_ALLOC flags by default.
          Improve ger and gemv for small matrices.
        * Improve gemv parallel with small m and large n case.
        * Improve ?imatcopy when lda==ldb (#633. Thanks, Martin Koehler)
        * Add vecLib benchmarks (#565. Thanks, Andreas Noack.)
        * Fix LAPACK lantr for row major matrices (#634. Thanks, Dan Kortschak)
        * Fix LAPACKE lansy (#640. Thanks, Dan Kortschak)
        * Import bug fixes for LAPACKE s/dormlq, c/zunmlq 
        * Raise the signal when pthread_create fails (#668. Thanks, James K. Lowden)
        * Remove g77 from compiler list.
        * Enable AppVeyor Windows CI.

x86/x86-64:
        * Support pure C generic kernels for x86/x86-64.
        * Support Intel Boardwell and Skylake by Haswell kernels.
        * Support AMD Excavator by Steamroller kernels.
        * Optimize s/d/c/zdot for Intel SandyBridge and Haswell.
        * Optimize s/d/c/zdot for AMD Piledriver and Steamroller.
        * Optimize s/d/c/zapxy for Intel SandyBridge and Haswell.
        * Optimize s/d/c/zapxy for AMD Piledriver and Steamroller.
        * Optimize d/c/zscal for Intel Haswell, dscal for Intel SandyBridge.
        * Optimize d/c/zscal for AMD Bulldozer, Piledriver and Steamroller.
        * Optimize s/dger for Intel SandyBridge.
        * Optimize s/dsymv for Intel SandyBridge.
        * Optimize ssymv for Intel Haswell.
        * Optimize dgemv for Intel Nehalem and Haswell.
        * Optimize dtrmm for Intel Haswell.

ARM:
        * Support Android NDK armeabi-v7a-hard ABI (-mfloat-abi=hard)
          e.g. make HOSTCC=gcc CC=arm-linux-androideabi-gcc NO_LAPACK=1 TARGET=ARMV7
        * Fix lock, rpcc bugs (#616, #617. Thanks, Grazvydas Ignotas)
POWER:
        * Support ppc64le platform (ELF ABI v2. #612. Thanks, Matthew Brandyberry.)
        * Support POWER7/8 by POWER6 kernels. (#612. Thanks, Fábio Perez.)

====================================================================
Version 0.2.14
24-Mar-2015
common:
        * Improve OpenBLASConfig.cmake. (#474, #475. Thanks, xantares.)
        * Improve ger and gemv for small matrices by stack allocation.
          e.g. make -DMAX_STACK_ALLOC=2048 (#482. Thanks, Jerome Robert.)
        * Introduce openblas_get_num_threads and openblas_get_num_procs.
          (#497. Thanks, Erik Schnetter.)
        * Add ATLAS-style ?geadd function. (#509. Thanks, Martin Köhler.)
        * Fix c/zsyr bug with negative incx. (#492.)
        * Fix race condition during shutdown causing a crash in
          gotoblas_set_affinity(). (#508. Thanks, Ton van den Heuvel.)

x86/x86-64:
        * Support AMD Streamroller.

ARM:
        * Add Cortex-A9 and Cortex-A15 targets.

====================================================================
Version 0.2.13
3-Dec-2014
common:
        * Add SYMBOLPREFIX and SYMBOLSUFFIX makefile options
          for adding a prefix or suffix to all exported symbol names
          in the shared library.(#459, Thanks Tony Kelman)
        * Provide OpenBLASConfig.cmake at installation.
        * Fix Fortran compiler detection on FreeBSD.
          (#470, Thanks Mike Nolta)


x86/x86-64:
        * Add generic kernel files for x86-64. make TARGET=GENERIC
        * Fix a bug of sgemm kernel on Intel Sandy Bridge.
        * Fix c_check bug on some amd64 systems. (#471, Thanks Mike Nolta)

ARM:
        * Support APM's X-Gene 1 AArch64 processors.
          Optimize trmm and sgemm. (#465, Thanks Dave Nuechterlein)

====================================================================
Version 0.2.12
13-Oct-2014
common:
        * Added CBLAS interface for ?omatcopy and ?imatcopy.
        * Enable ?gemm3m functions.
        * Added benchmark for ?gemm3m.
        * Optimized multithreading lower limits.
        * Disabled SYMM3M and HEMM3M functions 
          because of segment violations.

x86/x86-64:
        * Improved axpy and symv performance on AMD Bulldozer.
        * Improved gemv performance on modern Intel and AMD CPUs.

====================================================================
Version 0.2.11
18-Aug-2014
common:
        * Added some benchmark codes.
        * Fix link error on Linux/musl.(Thanks Isaac Dunham)

x86/x86-64:
        * Improved s/c/zgemm performance for Intel Haswell.
        * Improved s/d/c/zgemv performance.
        * Support the big numa machine.(EXPERIMENT)

ARM:
        * Fix detection when cpuinfo uses "Processor". (Thanks Isaiah)

====================================================================
Version 0.2.10
16-Jul-2014
common:
        * Added BLAS extensions as following.
          s/d/c/zaxpby, s/d/c/zimatcopy, s/d/c/zomatcopy.
        * Added OPENBLAS_CORETYPE environment for dynamic_arch. (a86d34)
        * Added NO_AVX2 flag for old binutils. (#401)
        * Support outputing the CPU corename on runtime.(#407)
        * Patched LAPACK to fix bug 114, 117, 118. 
          (http://www.netlib.org/lapack/bug_list.html)
        * Disabled ?gemm3m for a work-around fix. (#400)
x86/x86-64:
        * Fixed lots of bugs for optimized kernels on sandybridge,Haswell, 
          bulldozer, and piledriver.
          https://github.com/xianyi/OpenBLAS/wiki/Fixed-optimized-kernels-To-do-List

ARM:
        * Improved LAPACK testing.

====================================================================
Version 0.2.9
10-Jun-2014
common:
        * Improved the result for LAPACK testing. (#372)
        * Installed DLL to prefix/bin instead of prefix/lib. (#366)
        * Build import library on Windows.(#374)
x86/x86-64:
        * To improve LAPACK testing, we fallback some kernels. (#372)
        https://github.com/xianyi/OpenBLAS/wiki/Fixed-optimized-kernels-To-do-List

====================================================================
Version 0.2.9.rc2
06-Mar-2014
common:
        * Added OPENBLAS_VERBOSE environment variable.(#338)
        * Make OpenBLAS thread-pool resilient to fork via pthread_atfork.
          (#294, Thank Olivier Grisel)
        * Rewrote rotmg
        * Fixed sdsdot bug.
x86/x86-64:
        * Detect Intel Haswell for new Macbook.

====================================================================
Version 0.2.9.rc1
13-Jan-2013
common:
        * Update LAPACK to 3.5.0 version
        * Fixed compatiable issues with Clang and Pathscale compilers.

x86/x86-64:
        * Optimization on Intel Haswell.
        * Enable optimization kernels on AMD Bulldozer and Piledriver.

ARM:
        * Support ARMv6 and ARMv7 ISA.
        * Optimization on ARM Cortex-A9.

====================================================================
Version 0.2.8
01-Aug-2013
common:
        * Support Open64 5.0. (#266)
        * Add executable stack markings. (#262, Thank Sébastien Fabbro)
        * Respect user's LDFLAGS (Thank Sébastien Fabbro)

x86/x86-64:
        * Rollback bulldozer and piledriver kernels to barcelona kernels (#263)
          We will fix the compuational error bug in bulldozer and piledriver kernels.

====================================================================
Version 0.2.7
20-Jul-2013
common:
        * Support LSB (Linux Standard Base) 4.1.
          e.g. make CC=lsbcc
        * Include LAPACK 3.4.2 source codes to the repo.
          Avoid downloading at compile time.
        * Add NO_PARALLEL_MAKE flag to disable parallel make.
        * Create openblas_get_parallel to retrieve information which
          parallelization model is used by OpenBLAS. (Thank grisuthedragon)
        * Detect LLVM/Clang compiler. The default compiler is Clang on Mac OS X.
        * Change LIBSUFFIX from .lib to .a on windows.
        * A work-around for dtrti_U single thread bug. Replace it with LAPACK codes. (#191)

x86/x86-64:
        * Optimize c/zgemm, trsm, dgemv_n, ddot, daxpy, dcopy on
          AMD Bulldozer. (Thank Werner Saar)
        * Add Intel Haswell support (using Sandybridge optimizations).
          (Thank Dan Luu)
        * Add AMD Piledriver support (using Bulldozer optimizations).
        * Fix the computational error in zgemm avx kernel on
          Sandybridge. (#237)
        * Fix the overflow bug in gemv.
        * Fix the overflow bug in multi-threaded BLAS3, getrf when NUM_THREADS
          is very large.(#214, #221, #246).
MIPS64:
        * Support loongcc (Open64 based) compiler for ICT Loongson 3A/B.

Power:
        * Support Power7 by old Power6 kernels. (#220)

====================================================================
Version 0.2.6
2-Mar-2013
common:
        * Improved OpenMP performance slightly. (d744c9)
        * Improved cblas.h compatibility with Intel MKL.(#185)
        * Fixed the overflowing bug in single thread cholesky factorization.
        * Fixed the overflowing buffer bug of multithreading hbmv and sbmv.(#174)

x86/x86-64:
        * Added AMD Bulldozer x86-64 S/DGEMM AVX kernels. (Thank Werner Saar)
          We will tune the performance in future.
        * Auto-detect Intel Xeon E7540.
        * Fixed the overflowing buffer bug of gemv. (#173)
        * Fixed the bug of s/cdot about invalid reading NAN on x86_64. (#189)

MIPS64:

====================================================================
Version 0.2.5
26-Nov-2012
common:
        * Added NO_SHARED flag to disable generating the shared library.
        * Compile LAPACKE with ILP64 modle when INTERFACE64=1 (#158)
        * Export LAPACK 3.4.2 symbols in shared library. (#147)
        * Only detect the number of physical CPU cores on Mac OSX. (#157)
        * Fixed NetBSD build. (#155)
        * Fixed compilation with TARGET=GENERIC. (#160)
x86/x86-64:
        * Restore the original CPU affinity when calling
          openblas_set_num_threads(1) (#153)
        * Fixed a SEGFAULT bug in dgemv_t when m is very large.(#154)
MIPS64:

====================================================================
Version 0.2.4
8-Oct-2012
common:
        * Upgraded LAPACK to 3.4.2 version. (#145)
        * Provided support for passing CFLAGS, FFLAGS, PFLAGS,
          FPFLAGS to make. (#137)
        * f77blas.h:compatibility for compilers without C99 complex
          number support. (#141)
x86/x86-64:
        * Added NO_AVX flag. Check OS supporting AVX on runtime. (#139)
        * Fixed zdot incompatibility ABI issue with GCC 4.7 on
          Windows 32-bit. (#140)
MIPS64:
        * Fixed the generation of shared library bug.
        * Fixed the detection bug on the Loongson 3A server.
====================================================================
Version 0.2.3
20-Aug-2012
common:
        * Fixed LAPACK unstable bug about ?laswp. (#130)
        * Fixed the shared library bug about unloading the library on
          Linux (#132).
        * Fixed the compilation failure on BlueGene/P (TARGET=PPC440FP2)
          Please use gcc and IBM xlf. (#134)
x86/x86-64:
        * Supported goto_set_num_threads and openblas_set_num_threads
          APIs in Windows. They can set the number of threads on runtime.

====================================================================
Version 0.2.2
6-July-2012
common:
        * Fixed exporting DLL functions bug on Windows/MingW
        * Support GNU Hurd (Thank Sylvestre Ledru)
        * Support kfreebsd kernel (Thank Sylvestre Ledru)
x86/x86-64:
        * Support Intel Sandy Bridge 22nm desktop/mobile CPU
SPARC:
        * Improve the detection of SPARC (Thank Sylvestre Ledru)

====================================================================
Version 0.2.1
30-Jun-2012
common:
x86/x86-64:
        * Fixed the SEGFAULT bug about hyper-theading
        * Support AMD Bulldozer by using GotoBLAS2 AMD Barcelona codes

====================================================================
Version 0.2.0
26-Jun-2012
common:
        * Removed the limitation (64) of numbers of CPU cores.
          Now, it supports 256 cores at max.
        * Supported clang compiler.
        * Fixed some build bugs on FreeBSD
x86/x86-64:
        * Optimized Level-3 BLAS on Intel Sandy Bridge x86-64 by AVX instructions.
          Please use gcc >= 4.6 or clang >=3.1.
        * Support AMD Bobcat by using GotoBLAS2 AMD Barcelona codes.

====================================================================
Version 0.1.1
29-Apr-2012
common:
        * Upgraded LAPACK to 3.4.1 version. (Thank Zaheer Chothia)
        * Supported LAPACKE, a C interface to LAPACKE. (Thank Zaheer Chothia)
        * Fixed the build bug (MD5 and download) on Mac OSX.
        * Auto download CUnit 2.1.2-2 from SF.net with UTEST_CHECK=1.
        * Fxied the compatibility issue for compilers without C99 complex number
          (e.g. Visual Studio)
x86/x86_64:
        * Auto-detect Intel Sandy Bridge Core i7-3xxx & Xeon E7 Westmere-EX.
        * Test alpha=Nan in dscale.
        * Fixed a SEGFAULT bug in samax on x86 windows.

====================================================================
Version 0.1.0
23-Mar-2012
common:
        * Set soname of shared library on Linux.
        * Added LIBNAMESUFFIX flag in Makefile.rule. The user can use
          this flag to control the library name, e.g. libopenblas.a,
          libopenblas_ifort.a or libopenblas_omp.a.
        * Added GEMM_MULTITHREAD_THRESHOLD flag in Makefile.rule.
          The lib use single thread in GEMM function with small matrices.
x86/x86_64:
        * Used GEMV SSE/SSE2 kernels on x86 32-bit.
        * Exported CBLAS functions in Windows DLL.
MIPS64:
        * Completed Level-3 BLAS optimization on Loongson 3A CPU.
        * Improved GEMV performance on Loongson 3A CPU.
        * Improved Level-3 BLAS performance on Loongson 3B CPU. (EXPERIMENT)

====================================================================
Version 0.1 alpha2.5
19-Feb-2012
common:
        * Fixed missing "#include <sched.h>" bug on Mac OS X.
          Thank Mike Nolta for the patch.
        * Upgraded LAPACK to 3.4.0 version
        * Fixed a bug on Mac OS X. Don't require SystemStubs on OS X.
          SystemStubs does not exist on Lion. Thank Stefan Karpinski.
        * Improved README with using OpenMP. Check the internal threads
          count less than or equal to omp_get_max_threads()
x86/x86_64:
        * Auto-detect Intel Core i6/i7 (Sandy Bridge) CPU with Nehalem assembly kernels
        * Fixed some bugs on MingW 64-bit including zgemv, cdot, zdot.

====================================================================
Version 0.1 alpha2.4
18-Sep-2011
common:
        * Fixed a bug about installation. The header file "fblas77.h"
          works fine now.
        * Fixed #61 a building bug about setting TARGET and DYNAMIC_ARCH.
        * Try to handle absolute path of shared library in OSX. (#57)
          Thank Dr Kane O'Donnell.
        * Changed the installation folder layout to $(PREFIX)/include and
          $(PREFIX)/lib

x86/x86_64:
        * Fixed #58 zdot/xdot SEGFAULT bug with GCC-4.6 on x86. According
          to i386 calling convention, The callee should remove the first
          hidden parameter.Thank Mr. John for this patch.

====================================================================
Version 0.1 alpha2.3
5-Sep-2011

x86/x86_64:
        *  Added DTB_ENTRIES into dynamic arch setting parameters. Now,
           it can read DTB_ENTRIES on runtime. (Refs issue #55 on github)

====================================================================
Version 0.1 alpha2.2
14-Jul-2011

common:
        * Fixed a building bug when DYNAMIC_ARCH=1 & INTERFACE64=1.
          (Refs issue #44 on github)

====================================================================
Version 0.1 alpha2.1
28-Jun-2011

common:
        * Stop the build and output the error message when detecting
          fortran compiler failed. (Refs issue #42 on github)

====================================================================
Version 0.1 alpha2
23-Jun-2011

common:
        * Fixed blasint undefined bug in <cblas.h> file. Other software
          could include this header successfully(Refs issue #13 on github)
        * Fixed the SEGFAULT bug on 64 cores. On SMP server, the number
          of CPUs or cores should be less than or equal to 64.(Refs issue #14
          on github)
        * Support "void goto_set_num_threads(int num_threads)" and "void
          openblas_set_num_threads(int num_threads)" when USE_OPENMP=1
        * Added extern "C" to support C++. Thank Tasio for the patch(Refs
          issue #21 on github)
        * Provided an error message when the arch is not supported.(Refs
          issue #19 on github)
        * Fixed issue #23. Fixed a bug of f_check script about generating link flags.
        * Added openblas_set_num_threads for Fortran.
        * Fixed #25 a wrong result of rotmg.
        * Fixed a bug about detecting underscore prefix in c_check.
        * Print the wall time (cycles) with enabling FUNCTION_PROFILE
        * Fixed #35 a build bug with NO_LAPACK=1 & DYNAMIC_ARCH=1
        * Added install target. You can use "make install". (Refs #20)


x86/x86_64:
        * Fixed #28 a wrong result of dsdot on x86_64.
        * Fixed #32 a SEGFAULT bug of zdotc with gcc-4.6.
        * Fixed #33 ztrmm bug on Nehalem.
        * Work-around #27 the low performance axpy issue with small imput size & multithreads.

MIPS64:
        * Fixed #28 a wrong result of dsdot on Loongson3A/MIPS64.
        * Optimized single/double precision BLAS Level3 on Loongson3A/MIPS64. (Refs #2)
        * Optimized single/double precision axpy function on Loongson3A/MIPS64. (Refs #3)

====================================================================
Version 0.1 alpha1
20-Mar-2011

common:
        * Support "make  NO_LAPACK=1" to build the library without
          LAPACK functions.
        * Fixed randomly SEGFAULT when nodemask==NULL with above Linux 2.6.34.
          Thank Mr.Ei-ji Nakama providing this patch. (Refs issue #12 on github)
        * Added DEBUG=1 rule in Makefile.rule to build debug version.
        * Disable compiling quad precision in reference BLAS library(netlib BLAS).
        * Added unit testcases in utest/ subdir. Used  CUnit framework.
        * Supported OPENBLAS_* & GOTO_* environment variables (Pleas see README)
        * Imported GotoBLAS2 1.13 BSD version

x86/x86_64:
        * On x86 32bits, fixed a bug in zdot_sse2.S line 191. This would casue
          zdotu & zdotc failures. Instead, work-around it. (Refs issue #8 #9 on github)
        * Modified ?axpy functions to return same netlib BLAS results
          when incx==0 or incy==0 (Refs issue #7 on github)
        * Modified ?swap functions to return same netlib BLAS results
          when incx==0 or incy==0 (Refs issue #6 on github)
        * Modified ?rot functions to return same netlib BLAS results
          when incx==0 or incy==0 (Refs issue #4 on github)
        * Detect Intel Westmere,Intel Clarkdale and Intel Arrandale
          to use Nehalem codes.
        * Fixed a typo bug about compiling dynamic ARCH library.
MIPS64:
        * Improve daxpy performance on ICT Loongson 3A.
        * Supported ICT Loongson 3A CPU (Refs issue #1 on github)
====================================================================