All Versions
17
Latest Version
Avg Release Cycle
107 days
Latest Release
84 days ago

Changelog History
Page 1

  • v0.3.13

    December 12, 2020

    common:

    • โž• Added a generic bfloat16 SBGEMV kernel
    • ๐Ÿ›  Fixed a potentially severe memory leak after fork in OpenMP builds
      that was introduced in 0.3.12
    • โž• Added detection of the Fujitsu Fortran compiler
    • โž• Added detection of the (e)gfortran compiler on OpenBSD
    • โž• Added support for overriding the default name of the library independently
      ๐Ÿ— from symbol suffixing in the gmake builds (already supported in cmake)

    RISC V:

    • #### โž• Added a RISC V port optimized for C910V

    POWER:

    • โž• Added optimized POWER10 kernels for SAXPY, CAXPY, SDOT, DDOT and DGEMV_N
    • ๐Ÿ‘Œ Improved DGEMM performance on POWER10
    • ๐Ÿ‘Œ Improved STRSM and DTRSM performance on POWER9 and POWER10
    • ๐Ÿ›  Fixed segmemtation faults in DYNAMIC_ARCH builds
    • ๐Ÿ›  Fixed compilation with the PGI compiler

    x86:

    • ๐Ÿ›  Fixed compilation of kernels that require SSE2 intrinsics since 0.3.12

    x86_64:

    • โž• Added an optimized bfloat16 SBGEMV kernel for SkylakeX and Cooperlake
    • ๐Ÿ‘Œ Improved the performance of SASUM and DASUM kernels through parallelization
    • ๐Ÿ‘Œ Improved the performance of SROT and DROT kernels
    • ๐Ÿ‘Œ Improved the performance of multithreaded xSYRK
    • ๐Ÿ›  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)
    • ๐Ÿ›  Fixed miscompilations by old gcc 4.6
    • ๐Ÿ›  Fixed misdetection of AVX2 capability in some Sandybridge cpus
    • ๐Ÿ›  Fixed lockups in builds combining DYNAMIC_ARCH with TARGET=GENERIC on OpenBSD

    ARM64:

    • ๐Ÿ›  Fixed segmentation faults in DYNAMIC_ARCH builds

    MIPS:

    • ๐Ÿ‘Œ Improved kernels for Loongson 3R3 ("3A") and 3R4 ("3B") models, including MSA
    • ๐Ÿ›  Fixed bugs in the MSA kernels for CGEMM, CTRMM, CGEMV and ZGEMV
    • โž• Added handling of zero increments in the MSA kernels for SSWAP and DSWAP
    • โž• Added DYNAMIC_ARCH support for MIPS64 (currently Loongson3R3/3R4 only)

    SPARC:

    • ๐Ÿ›  Fixed building 32 and 64 bit SPARC kernels with the SolarisStudio compilers

    md5sum:
    2ca05b9cee97f0d1a8ab15bd6ea2b747 OpenBLAS-0.3.13.tar.gz
    ab433ae7ed37ad282a67c2cfcc7c4301 OpenBLAS-0.3.13.zip
    855469f768c6e32cf68f9cdb6f5fa69e OpenBLAS-0.3.13-x64.zip

    Download OpenBLAS

  • v0.3.12

    October 24, 2020

    common:

    • ๐Ÿ›  Fixed missing BLAS/LAPACK functions (inadvertently dropped during
      ๐Ÿ‘ท the build system restructuring to support selective compilation)
    • ๐Ÿ›  Fixed argument conversion macro in LAPACKE_zgesvdq (LAPACK #458)

    POWER:

    • โž• Added optimized SCOPY/CCOPY kernels for POWER10
    • 0๏ธโƒฃ Increased and unified the default size of the GEMM buffer
    • ๐Ÿ›  Fixed building for POWER10 in DYNAMIC_ARCH mode
    • โœ… POWER10 compatibility test now checks binutils version as well
    • โš  Cleaned up compiler warnings

    x86_64:

    • corrected compiler version checks for AVX2 compatibility
    • โž• added compiler option -mavx2 for building with flang
    • ๐Ÿ›  fixed direct SGEMM pathway for small matrix sizes (broken by
      โ™ป๏ธ the code refactoring in 0.3.11)
    • ๐Ÿ›  fixed unhandled partial register clobbers in several kernels
      for AXPY,DOT,GEMV_N and GEMV_T flagged by gcc10 tree-vectorizer

    ARMV8:

    • ๐Ÿ‘Œ improved Apple Vortex support to include cross-compiling

    Download OpenBLAS

    md5sums:
    03bff4558fc701b7d0e689814055ecb2 OpenBLAS-0.3.12.zip
    baf8c58c0ef6ebe0f9eb74a5c4acd662 OpenBLAS-0.3.12.tar.gz
    4df4ebb7b5c4f1b5ec8fa58f48be6a51 OpenBLAS-0.3.12-x64.zip

  • v0.3.11

    October 17, 2020

    NOTE there appear to be several defects in this version unfortunately - this should not be redistributed or used in a production environment

    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)

    • โž• 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

    • ๐Ÿ›  Fixed underflow and rounding errors in LAPACK SLANV2 and DLANV2
      (causing miscalculations in e.g. SHSEQR/DHSEQR, LAPACK issue #263)

    • ๐Ÿ›  Fixed workspace calculation in LAPACK ?GELQ (LAPACK issue #415)

    • ๐Ÿ›  Fixed several bugs in the LAPACK testsuite

    • ๐Ÿ‘Œ Improved performance of TRMM and TRSM for certain problem sizes

    • ๐Ÿ›  Fixed infinite recursions and workspace miscalculations in ReLAPACK

    • ๐Ÿ— 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

    • ๐Ÿ›  Fixed detection of gfortran when invoked through an mpi wrapper

    • ๐Ÿ‘Œ Improve thread reinitialization performance with OpenMP after a fork

    • โž• Added support for building only the subset of the library required
      ๐Ÿ— for a particular precision by specifying BUILD_SINGLE, BUILD_DOUBLE

    • ๐Ÿ›  Optional function name prefixes and suffixes are now correctly
      reflected in the generated cblas.h

    • โž• Added CMAKE build support for the LAPACK and multithreading tests

    POWER:

    • โž• Added optimized support for POWER10
    • โž• Added support for compiling for POWER8 in 32bit mode
    • โž• Added support for compilation with LLVM/clang
    • โž• Added support for compilation with NVIDIA/PGI compilers
    • ๐Ÿ›  Fixed building on big-endian POWER8
    • ๐Ÿ›  Fixed miscompilation of ZDOTC by gcc10
    • ๐Ÿ›  Fixed alignment errors in the POWER8 SAXPY kernel
    • ๐Ÿ‘Œ Improved CPU detection on AIX
    • ๐Ÿ‘Œ Supported building with older compilers on POWER9

    x86_64:

    • โž• Added support for Intel Cooperlake
    • โž• Added autodetection of AMD Renoir/Matisse/Zen3 cpus
    • โž• Added autodetection of Intel Comet Lake cpus
    • Reimplemented ?sum, ?dot and daxpy using universal intrinsics
    • ๐Ÿ Reset the fpu state before using the fpu on Windows as a workaround
      ๐Ÿ for a problem introduced in Windows 10 build 19041 (a.k.a. SDK 2004)
    • ๐Ÿ›  Fixed potentially undefined behaviour in the dot and gemv_t kernels
    • ๐Ÿ›  Fixed a potential segmentation fault in DYNAMIC_ARCH builds
    • ๐Ÿ›  Fixed building for ZEN with PGI/NVIDIA and AMD AOCC compilers

    ARMV7:

    • ๐Ÿ›  Fixed cpu detection on BSD-like systems

    ARMV8:

    • โž• Added preliminary support for Apple Vortex cpus
    • โž• Added support for the Cavium ThunderX3T110 cpu
    • ๐Ÿ›  Fixed cpu detection on BSD-like systems
    • ๐Ÿ›  Fixed compilation in -std=C18 mode

    IBM Z:

    • โž• Added support for compiling with the clang compiler
    • ๐Ÿ‘Œ Improved GEMM performance on Z14

    Download OpenBLAS

    md5sums:
    dd211b73398383a44ebd75fffabd937a OpenBLAS-0.3.11.tar.gz
    a76bfee7c125071bce6b24eae5b07468 OpenBLAS-0.3.11.zip
    bad36be9fe4fe40372b06d326cfc5a2f OpenBLAS-0.3.11-x64.zip

  • v0.3.10

    June 14, 2020

    common:

    • ๐Ÿ‘Œ Improved thread locking behaviour in blas_server and parallel getrf
    • ๐Ÿ›  Imported bugfix 394 from LAPACK (spurious reference to "XERBL"
      due to overlong lines)
    • ๐Ÿ›  Imported bugfix 403 from LAPACK (compile option "recursive" required
      for correctness with Intel and PGI)
    • ๐Ÿ›  Imported bugfix 408 from LAPACK (wrong scaling in ZHEEQUB)
    • ๐Ÿ›  Imported bugfix 411 from LAPACK (infinite loop in LARGV/LARTG/LARTGP)
    • ๐Ÿ›  Fixed mismatches between BUFFERSIZE and GEMM_UNROLL parameters that
      could lead to crashes at large matrix sizes
    • โช Restored internal soname in dynamic libraries on FreeBSD and Dragonfly
    • โž• Added API (openblas_setaffinity) to set thread affinity
      ๐Ÿง programmatically on Linux
    • โž• Added initial infrastructure for half-precision floating point
      ๐Ÿ‘ (bfloat16) support with a generic implementation of SHGEMM
    • โž• Added CMAKE build system support for building the cblas_Xgemm3m
      functions
    • ๐Ÿ›  Fixed CMAKE support for building in a path with embedded spaces
    • Fixed CMAKE (non)handling of NO_EXPRECISION and MAX_STACK_ALLOC
    • ๐Ÿ›  Fixed GCC version detection in the Makefiles
    • ๐Ÿ‘ Allowed overriding the names of AR, AS and LD in Makefile builds

    POWER:

    • ๐Ÿ›  fixed big-endian POWER8 ELFv2 builds on FreeBSD
    • ๐Ÿ›  Fixed GCC version checks and DYNAMIC_ARCH builds on POWER9
    • ๐Ÿ›  Fixed CMAKE build support for POWER9
    • ๐Ÿ›  fixed a potential race condition in the thread buffer allocation
    • โœ… Worked around LAPACK test failures on PPC G4

    MIPS:

    • ๐Ÿ›  fixed a potential race condition in the thread buffer allocation
    • โž• Added support for MIPS 24K/24KE family based on P5600 kernels

    MIPS64:

    • ๐Ÿ›  fixed a potential race condition in the thread buffer allocation
    • โž• Added TARGET=GENERIC

    ARMV7:

    • ๐Ÿ›  fixed a race condition in the thread buffer allocation

    ARMV8:

    • ๐Ÿ›  Fixed a race condition in the thread buffer allocation
    • ๐Ÿ›  Fixed zero initialisation in the assembly for SGEMM and DGEMM BETA
    • ๐Ÿ‘Œ Improved performance of the ThunderX2 DAXPY kernel
    • โž• Added an optimized SGEMM kernel for Cortex A53
    • ๐Ÿ›  Fixed Makefile support for INTERFACE64 (8-byte integer)

    x86_64:

    • ๐Ÿ›  Fixed a syntax error in the CMAKE setup for SkylakeX
    • ๐Ÿ‘Œ Improved performance of STRSM on Haswell, SkylakeX and Ryzen
    • ๐Ÿ‘Œ Improved SGEMM performance on SGEMM for workloads with ldc a
      multiple of 1024
    • ๐Ÿ‘Œ Improved DGEMM performance on Skylake X
    • ๐Ÿ›  Fixed unwanted AVX512-dependency of SGEMM in DYNAMIC_ARCH
      ๐Ÿ— builds created on SkylakeX
    • โœ‚ Removed data alignment requirement in the SSE2 copy kernels
      that could cause spurious crashes
    • โž• Added a workaround for an optimizer bug in AppleClang 11.0.3
    • ๐Ÿ›  Fixed LAPACK-TEST failures with Intel Fortran
    • ๐Ÿ›  Fixed compilation and LAPACK test results with recent Flang
      and AMD AOCC
    • ๐Ÿ›  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 X
    • ๐Ÿ›  Fixed reporting of cpu name in DYNAMIC_ARCH builds (would sometimes
      ๐Ÿ‘‰ show the name of an older generation chip supported by the same kernels)

    IBM Z:

    • ๐Ÿ‘Œ Improved performance of SGEMM/STRMM and DGEMM/DTRMM on Z14

    Download OpenBLAS

  • v0.3.9

    March 01, 2020

    common:

    • ๐Ÿ›  Fixed a miscompilation of the GETRF functions with CMAKE
    • The size of the memory buffer used for splitting GEMM tasks across
      ๐Ÿ‘ท multiple threads can now be configured in the build system.
    • ๐Ÿ›  Imported bugfix 390 from LAPACK (missing NaN propagation in xCOMBSSQ)

    POWER:

    • ๐Ÿ›  fixed several compilation problems related to endianness and
      ๐Ÿ‘ ELF version support on POWER8 and POWER9.
    • ๐Ÿ›  fixed misuse of the absolute value IAMIN/IAMAX in place of IMIN/IMAX
    • ๐Ÿ›  fixed a race condition in the level3 blas code

    MIPS64:

    • ๐Ÿ›  fixed misuse of the absolute value IAMIN/IAMAX in place of IMIN/IMAX

    ARMV7:

    • ๐Ÿ›  fixed a race condition in the level3 blas code
    • ๐Ÿ›  fixed a compilation problem on Android

    ARMV8:

    • โž• Added support for Ampere EMAG8180
    • โž• Added support for Neoverse N1
    • ๐Ÿ‘Œ improved performance of the blas_lock function
    • ๐Ÿ›  fixed a race condition in the level3 blas code
    • ๐Ÿ›  Fixed a performance regression on TSV110 servers

    x86_64:

    • ๐Ÿ›  Fixed a long-standing error with undeclared register clobbers in
      the DSCAL microkernel for Haswell,SkylakeX and Zen exposed by gcc9.2
    • ๐Ÿ›  Fixed a long-standing bug in the SSE implementation of the IAMAX functions
    • Fixed a cmake build failure with DYNAMIC_ARCH on x86_64
    • ๐Ÿ›  Fixed an oversight in the cpu detection code for Intel Goldmont+,
      Cannon Lake and Ice Lake
    • ๐Ÿ›  Fixed compile failure on OSX when the compiler name contains a dash
      (e.g. gcc-9)
    • ๐Ÿ›  Fixed compilation with MinGW on SkylakeX
    • ๐Ÿ‘Œ Improved speed of the AVX512 GEMM3M code, added an AVX512 kernel for
      ๐ŸŽ STRMM and improved performance of the AVX2 GEMM kernels

    IBM Z:

    • ๐Ÿ›  fixed compilation of the DYNAMIC_ARCH code

    Download OpenBLAS

  • 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
    

    Download OpenBLAS

  • 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
    • โœ… 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.
    • ๐Ÿง a build failure on Linux with glibc versions earlier than 2.5 was fixed
    • ๐Ÿ›  a runtime error with CPU enumeration (and NO_AFFINITY not set) on glibc 2.6 was fixed
    • ๐Ÿง NO_AFFINITY was added to the CMAKE options (and defaults to being active on Linux, as in the gmake builds)

    x86_64

    • ๐Ÿ— the build-time logic for detection of AVX512 availability in the processor and compiler was fixed
    • ๐Ÿ— 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
    • ๐ŸŽ 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:

    • โž• added support for building on FreeBSD/powerpc64 and FreeBSD/ppc970
    • โž• added optimized kernels for POWER9 single and double precision complex BLAS3
    • โž• added optimized kernels for POWER9 SGEMM and STRMM

    ARMV7:

    • ๐Ÿ›  fixed the softfp implementations of xAMAX and IxAMAX
    • โœ‚ removed the predefined -march= flags on both ARMV5 and ARMV6 as they were appropriate for only a subset of platforms

    Download OpenBLAS

  • 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
    

    Download OpenBLAS

  • 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
      ๐Ÿ›  has been fixed.
    • ๐Ÿ— 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
      ๐Ÿ›  the USE_TLS codepath was fixed.
    • ๐Ÿ— building of the utest cases on systems that do not provide
      ๐Ÿ›  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
      ๐Ÿ— to the common code parts of a DYNAMIC_ARCH build was fixed.
    • ๐Ÿ‘Œ improved performance of SGEMM for small workloads on Skylake X.
    • ๐ŸŽ performance of SGEMM and DGEMM was improved on Haswell.

    ARMV8:

    • ๐Ÿ”ง a configuration error that broke the CNRM2 kernel was corrected.
    • ๐Ÿ›  compilation of the GEMM kernels with CMAKE was fixed.
    • ๐Ÿ— 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.

    Download OpenBLAS

  • v0.3.4

    December 02, 2018

    common:

    • the new, experimental thread-local memory allocation had
      ๐Ÿ— inadvertently been left enabled for gmake builds in 0.3.3
      0๏ธโƒฃ despite the announcement. It is now disabled by default, and
      ๐Ÿ— 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
      0๏ธโƒฃ 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
      ๐Ÿ›  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).
      ๐ŸŽ This should provide better performance than the known-threadsafe
      (but non-default) USE_SIMPLE_THREADED_LEVEL3 option.
    • ๐Ÿ— When building LAPACK with gfortran, -frecursive is now (again)
      0๏ธโƒฃ enabled by default to ensure correct behaviour.
    • ๐Ÿ‘ 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.
    • ๐Ÿ— A potential race condition during the build of LAPACK (that would
      ๐Ÿ— usually manifest itself as a failure to build TESTING/MATGEN) has been
      ๐Ÿ›  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.
    • ๐Ÿ”— 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:

    • ๐Ÿ›  Autodetection of AMD Ryzen2 has been fixed (again).
    • ๐Ÿ— 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:

    • โž• added support for building on AIX (with gcc and GNU tools from AIX Toolbox).
    • CPU type detection has been implemented for AIX.
    • ๐Ÿ›  CPU type detection has been fixed for NETBSD.

    MIPS64:

    • โœ… AXPY on LOONGSON3A has been corrected to pass "zero increment" utest.
    • ๐Ÿ›  DSDOT on LOONGSON3A has been fixed.
    • the SGEMM microkernel has been hardened against potential data loss.

    ARMV8:

    • ๐Ÿ‘ DYNAMic_ARCH support is now available for 64bit ARM
    • cross-compiling for ARMV8 under iOS now works.
    • ๐Ÿ‘ cpu-specific code has been rearranged to make better use of both
      hardware commonalities and model-specific compiler optimizations.
    • ๐Ÿšš XGENE1 has been removed as a TARGET, superseded by the improved generic
      ๐Ÿ‘ ARMV8 support.

    ARMV7:

    • Older assembly mnemonics have been converted to UAL form to allow
      ๐Ÿ— building with clang 7.0
    • ๐Ÿ›  Cross compiling LAPACKE for Android has been fixed again (broken by
      โšก๏ธ update to LAPACK 3.7.0 some while ago).

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