All Versions
13
Latest Version
Avg Release Cycle
118 days
Latest Release
31 days ago

Changelog History
Page 1

  • v0.3.9

    March 01, 2020

    common:

    • 🛠 Fixed a miscompilation of the GETRF functions with CMAKE
    • The size of the memory buffer used for splitting GEMM tasks across
      👷 multiple threads can now be configured in the build system.
    • 🛠 Imported bugfix 390 from LAPACK (missing NaN propagation in xCOMBSSQ)

    POWER:

    • 🛠 fixed several compilation problems related to endianness and
      👍 ELF version support on POWER8 and POWER9.
    • 🛠 fixed misuse of the absolute value IAMIN/IAMAX in place of IMIN/IMAX
    • 🛠 fixed a race condition in the level3 blas code

    MIPS64:

    • 🛠 fixed misuse of the absolute value IAMIN/IAMAX in place of IMIN/IMAX

    ARMV7:

    • 🛠 fixed a race condition in the level3 blas code
    • 🛠 fixed a compilation problem 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 servers

    x86_64:

    • 🛠 Fixed a long-standing error with undeclared register clobbers in
      the DSCAL microkernel for Haswell,SkylakeX and Zen exposed by gcc9.2
    • 🛠 Fixed a long-standing bug in the SSE implementation of the IAMAX functions
    • Fixed a cmake build failure with DYNAMIC_ARCH on x86_64
    • 🛠 Fixed an oversight in the cpu detection code for Intel Goldmont+,
      Cannon Lake and Ice Lake
    • 🛠 Fixed compile failure on OSX when the compiler name contains a dash
      (e.g. gcc-9)
    • 🛠 Fixed compilation with MinGW on SkylakeX
    • 👌 Improved speed of the AVX512 GEMM3M code, added an AVX512 kernel for
      🐎 STRMM and improved performance of the AVX2 GEMM kernels

    IBM Z:

    • 🛠 fixed compilation of the DYNAMIC_ARCH code

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  • v0.3.8

    February 09, 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
    - compilation with (upcoming) gcc 10 is now supported
    

    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
    

    IBM Z:

    - Z15 is now supported as Z14
    - DYNAMIC_ARCH is now available on ZARCH as well
    

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  • v0.3.7

    August 11, 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 zero in gmake builds no longer has the same effect as setting them to one
    • ✅ 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 single and double precision complex BLAS3
    • ➕ 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

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  • v0.3.6

    April 29, 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 problems with ReLAPACK and its 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.
    

    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
    

    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
    

    IBM Z:

    - optimized microkernels for single precicion BLAS1/2 functions have been added for Z13 and Z14
    

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  • v0.3.5

    December 31, 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.

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  • v0.3.4

    December 02, 2018

    common:

    • the new, experimental thread-local memory allocation had
      🏗 inadvertently been left enabled for gmake builds in 0.3.3
      0️⃣ 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
      0️⃣ 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)
      0️⃣ 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).

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  • v0.3.3

    August 30, 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 allow enabling the new code instead
      ,
      0️⃣ 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

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  • v0.3.2

    July 30, 2018

    common:

    • 🛠 fixes for regressions caused by the rewrite of the thread initialization code in 0.3.1

    x86_64:

    • ➕ added autodetection of AMD Ryzen 2
    • 🛠 fixed build with older versions of MSVC

    Power:

    • 🛠 fixed cpu autodetection for the BSDs

    mips64:

    • 🛠 fixed utest errors in AXPY, DSDOT, ROT and SWAP

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  • v0.3.1

    July 01, 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

    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

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  • v0.3.0

    May 23, 2018

    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
    

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