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Changelog.txt
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OpenBLAS ChangeLog
====================================================================
Version 0.3.27
4-Apr-2024
general:
- added initial (generic) support for the CSKY architecture
- capped the maximum number of threads used in GEMM, GETRF and POTRF to avoid creating
underutilized or idle threads
- sped up multithreaded POTRF on all platforms
- added extension openblas_set_num_threads_local() that returns the previous thread count
- re-evaluated the SGEMV and DGEMV load thresholds to avoid activating multithreading
for too small workloads
- improved the fallback code used when the precompiled number of threads is exceeded,
and made it callable multiple times during the lifetime of an instance
- added CBLAS interfaces for the BLAS extensions ?AMIN,?AMAX, CAXPYC and ZAXPYC
- fixed a potential buffer overflow in the interface to the GEMMT kernels
- fixed use of incompatible pointer types in GEMMT and C/ZAXPBY as flagged by GCC-14
- fixed unwanted case sensitivity of the character parameters in ?TRTRS
- sped up the OpenMP thread management code
- fixed sizing of logical variables in INTERFACE64 builds of the C version of LAPACK
- fixed inclusion of new LAPACK and LAPACKE functions from LAPACK 3.11 in the shared library
- added a testsuite for the BLAS extensions
- modified the error thresholds for SGS/DGS functions in the LAPACK testsuite to suppress
spurious errors
- added support for building the benchmark collection with CMAKE
- added rewriting of linker options to avoid linking both libgomp and libomp in CMAKE builds
with OpenMP enabled that use clang with gfortran
- fixed building on systems with ucLibc
- added support for calling ?NRM2 with a negative increment value on all architectures
- added support for the LLVM18 version of the flang-new compiler
- fixed handling of the OPENBLAS_LOOPS variable in several benchmarks
- Integrated fixes from the Reference-LAPACK project:
- Increased accuracy in C/ZLARFGP (Reference-LAPACK PR 981)
x86:
- fixed handling of NaN and Inf arguments in ZSCAL
- fixed GEMM3M functions failing in CMAKE builds
x86-64:
- removed all instances of sched_yield() on Linux and BSD
- fixed a potential deadlock in the thread server on MSWindows (introduced in 0.3.26)
- fixed GEMM3M functions failing in CMAKE builds
- fixed handling of NaN and Inf arguments in ZSCAL
- added compiler checks for AVX512BF16 compatibility
- fixed LLVM compiler options for Sapphire Rapids
- fixed cpu handling fallbacks for Sapphire Rapids with
disabled AVX2 in DYNAMIC_ARCH mode
- fixed extensions SCSUM and DZSUM
- improved GEMM performance for ZEN targets
arm:
- fixed handling of NaN and Inf arguments in ZSCAL
arm64:
- added initial support for the Cortex-A76 cpu
- fixed handling of NaN and Inf arguments in ZSCAL
- fixed default compiler options for gcc (-march and -mtune)
- added support for ArmCompilerForLinux
- added support for the NeoverseV2 cpu in DYNAMIC_ARCH builds
- fixed mishandling of the INTERFACE64 option in CMAKE builds
- corrected SCSUM kernels (erroneously duplicating SCASUM behaviour)
- added SVE-enabled kernels for CSUM/ZSUM
- worked around an inaccuracy in the NRM2 kernels for NeoverseN1 and Apple M
power:
- improved performance of SGEMM on POWER8/9/10
- improved performance of DGEMM on POWER10
- added support for OpenMP builds with xlc/xlf on AIX
- improved cpu autodetection for DYNAMIC_ARCH builds on older AIX
- fixed cpu core counting on AIX
- added support for building a shared library on AIX
riscv64:
- added support for the X280 cpu
- added support for semi-generic RISCV models with vector length 128 or 256
- added support for compiling with either RVV 0.7.1 or RVV 1.0 standard compilers
- fixed handling of NaN and Inf arguments in ZSCAL
- improved cpu model autodetection
- fixed corner cases in ?AXPBY for C910V
- fixed handling of zero increments in ?AXPY kernels for C910V
loongarch64:
- added optimized kernels for ?AMIN and ?AMAX
- fixed handling of NaN and Inf arguments in ZSCAL
- fixed handling of corner cases in ?AXPBY
- fixed computation of SAMIN and DAMIN in LSX mode
- fixed computation of ?ROT
- added optimized SSYMV and DSYMV kernels for LSX and LASX mode
- added optimized CGEMM and ZGEMM kernels for LSX and LASX mode
- added optimized CGEMV and ZGEMV kernels
mips:
- fixed utilizing MSA on P5600 and related cpus (broken in 0.3.22)
- fixed handling of NaN and Inf arguments in ZSCAL
- fixed mishandling of the INTERFACE64 option in CMAKE builds
zarch:
- fixed handling of NaN and Inf arguments in ZSCAL
- fixed calculation of ?SUM on Z13
====================================================================
Version 0.3.26
2-Jan-2024
general:
- improved the version of openblas.pc that is created by the CMAKE build
- fixed a CMAKE-specific build problem on older versions of MacOS
- worked around linking problems on old versions of MacOS
- corrected installation location of the lapacke_mangling header in CMAKE builds
- added type declarations for complex variables to the MSVC-specific parts of the LAPACK header
- significantly sped up ?GESV for small problem sizes by introducing a lower bound for multithreading
- imported additions and corrections from the Reference-LAPACK project:
- added new LAPACK functions for truncated QR with pivoting (Reference-LAPACK PRs 891&941)
- handle miscalculation of minimum work array size in corner cases (Reference-LAPACK PR 942)
- fixed use of uninitialized variables in ?GEDMD and improved inline documentation (PR 959)
- fixed use of uninitialized variables (and consequential failures) in ?BBCSD (PR 967)
- added tests for the recently introduced Dynamic Mode Decomposition functions (PR 736)
- fixed several memory leaks in the LAPACK testsuite (PR 953)
- fixed counting of testsuite results by the Python script (PR 954)
x86-64:
- fixed computation of CASUM on SkylakeX and newer targets in the special
case that AVX512 is not supported by the compiler or operating environment
- fixed potential undefined behaviour in the CASUM/ZASUM kernels for AVX512 targets
- worked around a problem in the pre-AVX kernels for GEMV
- sped up the thread management code on MS Windows
arm64:
- fixed building of the LAPACK testsuite with Xcode 15 on Apple M1 and newer
- sped up the thread management code on MS Windows
- sped up SGEMM and DGEMM on Neoverse V1 and N1
- sped up ?DOT on SVE-capable targets
- reduced the number of targets in DYNAMIC_ARCH builds by eliminating functionally equivalent ones
- included support for Apple M1 and newer targets in DYNAMIC_ARCH builds
power:
- improved the SGEMM kernel for POWER10
- fixed compilation with (very) old versions of gcc
- fixed detection of old 32bit PPC targets in CMAKE-based builds
- added autodetection of the POWERPC 7400 subtype
- fixed CMAKE-based compilation for PPCG4 and PPC970 targets
loongarch64:
- added and improved optimized kernels for almost all BLAS functions
====================================================================
Version 0.3.25
12-Nov-2023
general:
- improved the error message shown on exceeding the maximum thread count
- improved the code to add supplementary thread buffers in case of overflow
- fixed a potential division by zero in ?ROTG
- improved the ?MATCOPY functions to accept zero-sized rows or columns
- corrected empty prototypes in function declarations
- cleaned up unused declarations in the f2c-converted versions of the LAPACK sources
- fixed compilation with the Cray CCE Compiler suite
- improved link line rewriting to avoid mixed libgomp/libomp builds with clang&gfortran
- worked around OPENMP builds with LLVM14's libomp hanging on FreeBSD
- improved the Makefiles to require less option duplication on "make install"
- imported the following changes from the upcoming release 3.12 of Reference-LAPACK
- deprecate utility functions ?GELQS and ?GEQRS (LAPACK PR 900)
- apply rounding up to workspace calculations done in floating point (LAPACK PR 904)
- avoid overflow in STGEX2/DTGEX2 (LAPACK PR 907)
- fix accumulation in ?LASSQ (LAPACK PR 909)
- fix handling of NaN values in ?GECON (LAPACK PR 926)
- avoid overflow in CBDSQR/ZBDSQR (LAPACK PR 927)
- fix poor vector orthogonalizations in ?ORBDB5/?UNBDB5 (LAPACK PR 928 & 930)
x86-64:
- fixed compile-time autodetection of AMD Ryzen3 and Ryzen4 cpus
- fixed capability-based fallback selection for unknown cpus in DYNAMIC_ARCH
- added AVX512 optimizations for ?ASUM on Sapphire Rapids and Cooper Lake
ARM64:
- fixed building on Apple with homebrew gcc
- fixed building with XCODE 15
- fixed building on A64FX and Cortex A710/X1/X2
- increased the default buffer size for recent ARM server cpus
POWER:
- fixed building with the IBM xlf 16.1.1 compiler
- fixed building with IBM XL C
- added support for DYNAMIC_ARCH builds with clang
- fixed union declaration in the BFLOAT16 test case
- enable optimizations for the AIX assembler on POWER10
LOONGARCH64:
- added an optimized SGEMV kernel
- added an optimized DTRSM kernel
====================================================================
Version 0.3.24
03-Sep-2023
general:
- declared the arguments of cblas_xerbla as const (in accordance with the reference implementation
and others, the previous discrepancy appears to have dated back to GotoBLAS)
- fixed the implementation of ?GEMMT that was added in 0.3.23
- made cpu-specific SWITCH_RATIO parameters for GEMM available to DYNAMIC_ARCH builds
- fixed application of SYMBOLSUFFIX in CMAKE builds
- fixed missing SSYCONVF function in the shared library
- fixed parallel build logic used with gmake
- added support for compilation with LLVM17, in particular its new Fortran compiler
- added support for CMAKE builds using the NVIDIA HPC compiler
- fixed INTERFACE64 builds with CMAKE and the f95 Fortran compiler
- fixed cross-build detection and management in c_check
- disabled building of the tests with CMAKE when ONLY_CBLAS is defined
- fixed several issues with the handling of runtime limits on the number of OPENMP threads
- corrected the error code returned by SGEADD/DGEADD when LDA is too small
- corrected the error code returned by IMATCOPY when LDB is too small
- updated ?NRM2 to support negative increment values (as introduced in release 3.10
of the reference BLAS)
- fixed OpenMP builds with CLANG for the case where libomp is not in a standard location
- fixed a potential overwrite of unrelated memory during thread initialisation on startup
- fixed a potential integer overflow in the multithreading threshold for ?SYMM/?SYRK
- fixed build of the LAPACKE interfaces for the LAPACK 3.11.0 ?TRSYL functions added in 0.3.22
- fixed installation of .cmake files in concurrent 32 and 64bit builds with CMAKE
- applied additions and corrections from the development branch of Reference-LAPACK:
- fixed actual arguments passed to a number of LAPACK functions (from Reference-LAPACK PR 885)
- fixed workspace query results in LAPACK ?SYTRF/?TRECV3 (from Reference-LAPACK PR 883)
- fixed derivation of the UPLO parameter in LAPACKE_?larfb (from Reference-LAPACK PR 878)
- fixed a crash in LAPACK ?GELSDD on NRHS=0 (from Reference-LAPACK PR 876)
- added new LAPACK utility functions CRSCL and ZRSCL (from Reference-LAPACK PR 839)
- corrected the order of eigenvalues for 2x2 matrices in ?STEMR (Reference-LAPACK PR 867)
- removed spurious reference to OpenMP variables outside OpenMP contexts (Reference-LAPACK PR 860)
- updated file comments on use of LAMBDA variable in LAPACK (Reference-LAPACK PR 852)
- fixed documentation of LAPACK SLASD0/DLASD0 (Reference-LAPACK PR 855)
- fixed confusing use of "minor" in LAPACK documentation (Reference-LAPACK PR 849)
- added new LAPACK functions ?GEDMD for dynamic mode decomposition (Reference-LAPACK PR 736)
- fixed potential stack overflows in the EIG part of the LAPACK testsuite (Reference-LAPACK PR 854)
- applied small improvements to the variants of Cholesky and QR functions (Reference-LAPACK PR 847)
- removed unused variables from LAPACK ?BDSQR (Reference-LAPACK PR 832)
- fixed a potential crash on allocation failure in LAPACKE SGEESX/DGEESX (Reference-LAPACK PR 836)
- added a quick return from SLARUV/DLARUV for N < 1 (Reference-LAPACK PR 837)
- updated function descriptions in LAPACK ?GEGS/?GEGV (Reference-LAPACK PR 831)
- improved algorithm description in ?GELSY (Reference-LAPACK PR 833)
- fixed scaling in LAPACK STGSNA/DTGSNA (Reference-LAPACK PR 830)
- fixed crash in LAPACKE_?geqrt with row-major data (Reference-LAPACK PR 768)
- added LAPACKE interfaces for C/ZUNHR_COL and S/DORHR_COL (Reference-LAPACK PR 827)
- added error exit tests for SYSV/SYTD2/GEHD2 to the testsuite (Reference-LAPACK PR 795)
- fixed typos in LAPACK source and comments (Reference-LAPACK PRs 809,811,812,814,820)
- adopt refactored ?GEBAL implementation (Reference-LAPACK PR 808)
x86_64:
- added cpu model autodetection for Intel Alder Lake N
- added activation of the AMX tile to the Sapphire Rapids SBGEMM kernel
- worked around miscompilations of GEMV/SYMV kernels by gcc's tree-vectorizer
- fixed compilation of Cooperlake and Sapphire Rapids kernels with CLANG
- fixed runtime detection of Cooperlake and Sapphire Rapids in DYNAMIC_ARCH
- fixed feature-based cputype fallback in DYNAMIC_ARCH
- added support for building the AVX512 kernels with the NVIDIA HPC compiler
- corrected ZAXPY result on old pre-AVX hardware for the INCX=0 case
- fixed a potential use of uninitialized variables in ZTRSM
ARM64:
- added cpu model autodetection for Apple M2
- fixed wrong results of CGEMM/CTRMM/DNRM2 under OSX (use of reserved register)
- added support for building the SVE kernels with the NVIDIA HPC compiler
- added support for building the SVE kernels with the Apple Clang compiler
- fixed compiler option handling for building the SVE kernels with LLVM
- implemented SWITCH_RATIO parameter for improved GEMM performance on Neoverse
- activated SVE SGEMM and DGEMM kernels for Neoverse V1
- improved performance of the SVE CGEMM and ZGEMM kernels on Neoverse V1
- improved kernel selection for the ARMV8SVE target and added it to DYNAMIC_ARCH
- fixed runtime check for SVE availability in DYNAMIC_ARCH builds to take OS or
container restrictions into account
- fixed a potential use of uninitialized variables in ZTRSM
- fix a potential misdetection of ARMV8 hardware as 32bit in CMAKE builds
LOONGARCH64:
- added ABI detection
- added support for cpu affinity handling
- fixed compilation with early versions of the Loongson toolchain
- added an optimized SGEMM kernel for 3A5000
- added optimized DGEMV kernels for 3A5000
- improved the performance of the DGEMM kernel for 3A5000
MIPS64:
- fixed miscompilation of TRMM kernels for the MIPS64_GENERIC target
POWER:
- fixed compiler warnings in the POWER10 SBGEMM kernel
RISCV:
- fixed application of the INTERFACE64 option when building with CMAKE
- fix a potential misdetection of RISCV hardware as 32bit in CMAKE builds
- fixed IDAMAX and DOT kernels for C910V
- fixed corner cases in the ROT and SWAP kernels for C910V
- fixed compilation of the C910V target with recent vendor compilers
====================================================================
Version 0.3.23
01-Apr-2023
general:
- fixed a serious regression in GETRF/GETF2 and ZGETRF/ZGETF2 where
subnormal but nonzero data elements triggered the singularity flag
- fixed a long-standing bug in CSPR/ZSPR in single-threaded operation
for cases where elements of the X vector are real numbers (or
complex with only the real part zero)
- fixed gmake builds with the option NO_LAPACK
- fixed a few instances in the gmake Makefiles where expressly
setting NO_LAPACK=0 or NO_LAPACKE=0 would have the opposite effect
x86_64:
- added further CPUID values for Intel Raptor Lake
====================================================================
Version 0.3.22
26-Mar-2023
general:
- Updated the included LAPACK to Reference-LAPACK release 3.11.0
plus post-release corrections and improvements
- Added initial support for processing with the EMSCRIPTEN javascript
converter (yielding a single-threaded build only)
- Added a threshold for multithreading in SYMM, SYMV and SYR2K
- Increased the threshold for multithreading in SYRK
- OpenBLAS no longer decreases the global OMP_NUM_THREADS when it
exceeds the maximum thread count the library was compiled for.
- fixed ?GETF2 potentially returning NaN with tiny matrix elements
- fixed openblas_set_num_threads to work in USE_OPENMP builds
- fixed cpu core counting in USE_OPENMP builds returning the number
of OMP "places" rather than cores
- fixed interpretation of USE_PERL=0 in build scripts
- fixed linking of the library with libm in CMAKE builds
- fixed startup delays resulting from a wrong default setting of
NO_WARMUP in CMAKE builds
- fixed inconsistent defaults for overriding of LAPACK SPMV, SPR,
SYMV, SYR functions in gmake and CMAKE builds
- fixed stride calculation in the optimized small-matrix path of
complex SYR
- fixed compilation of ReLAPACK with CMAKE
- fixed pkgconfig file contents for INTERFACE64 builds
- fixed building of Reference-LAPACK with recent gfortran
- fixed building with only a subset of precision types on Windows
- added new environment variable OPENBLAS_DEFAULT_NUM_THREADS
- added a GEMV-based implementation of GEMMT
- added support for building under QNX
- updated support for (cross-)building for ALPHA targets
x86_64:
- added autodetection of Intel Raptor Lake cpu models
- added SSCAL microkernels for Haswell and newer targets
- improved the performance of the Haswell DSCAL microkernel
- added CSCAL and ZSCAL microkernels for SkylakeX targets
- fixed detection of gfortran and Cray CCE compilers
- fixed detection of recent versions of the Intel Fortran compiler
- fixed compilation with LLVM to no longer run out of AVX512 registers
- fix cpu type option setting with recent NVIDIA HPC compiler versions
- fixed compilation for/on AMD Ryzen 4 cpus
- fixed compilation of AVX2-capable targets with Apple Clang
- fixed runtime selection of COOPERLAKE in DYNAMIC_ARCH builds
- worked around gcc/llvm using risky FMA operations in CSCAL/ZSCAL
- worked around miscompilations of GEMV, SYMV and ZDOT kernels
by gcc12's tree-vectorizer on OSX and Windows
ARM:
- fixed cross-compilation to ARMV5 and ARMV6 targets with CMAKE
ARMV8:
- fixed cross-compilation to CortexA53 with CMAKE
- fixed compilation with CMAKE and "Arm Compiler for Linux 22.1"
- added cpu autodetection for Cortex X3 and A715
- fixed conditional compilation of SVE-capable targets in DYNAMIC_ARCH
- sped up SVE kernels by removing unnecessary prefetches
- improved the GEMM performance of Neoverse V1
- added SVE kernels for SDOT and DDOT
- added an SBGEMM kernel for Neoverse N2
- improved cpu-specific compiler option selection for Neoverse cpus
- added support for setting CONSISTENT_FPCSR
MIPS64:
- improved MSA capability detection and handling
- added a MIPS64_GENERIC build target
- fixed corner cases in DNRM2
LOONGARCH64:
- fixed handling of the INTERFACE64 option
RISCV:
- fixed handling of the INTERFACE64 option
====================================================================
Version 0.3.21
07-Aug-2022
general:
- Updated the included LAPACK to Reference-LAPACK release 3.10.1
- when no Fortran compiler is available, OpenBLAS builds will now automatically
build LAPACK from an f2c-converted copy of LAPACK 3.9.0 unless the NO_LAPACK option
is specified
- similarly added C versions of the BLAS and CBLAS tests
- enabled building of the ReLAPACK GEMMT kernels when ReLAPACK is built
- function LAPACKE_lsame is now annotated with the GCC attribute "const" to aid static analyzers
- added USE_TLS to the list of options reported by the openblas_get_config() function
- CMAKE builds now support the BUILD_TESTING keyword (to disable the LAPACK testsuite) of Reference-LAPACK
- fixed CMAKE builds of the laswp_ncopy and neg_tcopy kernels
- removed the build system requirements for PERL (while keeping the original perl scripts as backup)
- handle building and running OpenBLAS on systems that report zero available cpu cores
- added SYMBOLPREFIX/SYMBOLSUFFIX handling for LAPACK 3.10.0 functions added in 0.3.20
- fixed linking of the utests on QNX
- Added support for compilation with the Intel ifx compiler
- Added support for compilation with the Fujitsu FCC compiler for Fugaku
- Added support for compilation with the Cray C and Fortran compilers
- reverted OpenMP threadpool behaviour in the exec_blas call to its state before 0.3.11, that is
the threadpool will no longer grow or shrink on demand as the overhead for this is too big at least with
GNU OpenMP. The adaptive behaviour introduced in 0.3.11 can still be requested at runtime by setting
the environment variable OMP_ADAPTIVE
- worked around spurious STFSM/CTFSM errors reported by the LAPACK testsuite
x86_64:
- fixed determination of compiler support for AVX512 and removed the 0.3.19
workaround for building SKYLAKEX kernels on Sandybridge hardware
- fixed compilation for the SKYLAKEX target with gcc 6
- fixed compilation of the CooperLake SBGEMM kernel with LLVM
- fixed compilation of the SkyLakeX small matrix GEMM kernels with LLVM or ICC
- fixed compilation of some BFLOAT16 kernels with CMAKE
- added support for the Zhaoxin/Centaur KH40000 cpu
- fixed a potential crash in the ZSYMV kernel used for all targets except generic
- fixed gmake compilation for DYNAMIC_ARCH with a DYNAMIC_LIST including ATOM
- fixed compilation of LAPACKE with the INTEGER64 option on Windows
- added support for cross-compiling to individual Intel or AMD targets using CMAKE
(previously only CORE2 supported, added targets are ATOM, PRESCOTT, NEHALEM, SANDYBRIDGE,
HASWELL,SKYLAKEX, COOPERLAKE, SAPPHIRERAPIDS, OPTERON, BARCELONA, BULLDOZER, PILEDRIVER,
STEAMROLLER,EXCAVATOR, ZEN)
SPARC:
- worked around an overflow error in the DNRM2 kernel
POWER:
- worked around an overflow error in the POWER6 DNRM2 kernel
- fixed compilation on PPC440
- fixed a performance regression in the level1 BLAS on POWER10
- fixed the POWER10 ZGEMM kernel
- fixed singlethreaded builds for POWER10
- fixed compilation of the POWER10 DGEMV kernel with older gcc versions
- enabled compilation of the BFLOAT16 kernels by default
- enabled the small matrix kernels by default for DYNAMIC_ARCH builds
- added a workaround for a miscompilation of the CDOT and ZDOT kernels by GCC 12
- RISCV:
- fixed cpu autodetection logic
ARMV8:
- added an SBGEMM kernel for Neoverse N2
- worked around an overflow error in the DNRM2 kernel used on M1, NeoverseN1, ThunderX2T99
- added support for ARM64 systems running MS Windows
- added support for cross-compiling to the GENERIC ARMV8 target under CMAKE (Windows/MSVC)
- fixed a performance regression in the generic ARMV8 DGEMM kernel introduced in 0.3.19
- added initial support for the Apple M1 cpu under Linux
- added initial support for the Phytium FT2000 cpu
- added initial support for the Cortex A510, A710, X1 and X2 cpu
- fixed an accidental mixup of cpu identifiers in the autodetection code introduced in 0.3.20
- fixed linking of Apple M1 builds on macOS 12 and later with recent XCode
- made Neoverse N2 available in DYNAMIC_ARCH builds
MIPS,MIPS64:
- worked around an overflow error in the DNRM2 kernel
LOONGARCH64:
- worked around an overflow error in the DNRM2 kernel
- added preliminary support for the LOONGSON2K1000 cpu
- added DYNAMIC_ARCH support
====================================================================
Version 0.3.20
20-Feb-2022
general:
- some code cleanup, with added casts etc.
- fixed obtaining the cpu count with OpenMP and OMP_PROC_BIND unset
- fixed pivot index calculation by ?LASWP for negative increments other than one
- fixed input argument check in LAPACK ? GEQRT2
- improved the check for a Fortran compiler in CMAKE builds
- disabled building OpenBLAS' optimized versions of LAPACK complex SPMV,SPR,SYMV,SYR with NO_LAPACK=1
- fixed building of LAPACK on certain distributed filesystems with parallel gmake
- fixed building the shared library on MacOS with classic flang
x86_64:
- fixed cross-compilation with CMAKE for CORE2 target
- fixed miscompilation of AVX512 code in DYNAMIC_ARCH builds
- added support for the "incidental" AVX512 hardware in Alder Lake when enabled in BIOS
E2K:
- add new architecture (Russian Elbrus E2000 family)
SPARC:
- fix IMIN/IMAX
ARMV8:
- added SVE-enabled CGEMM and ZGEMM kernels for ARMV8SVE and A64FX
- added support for Neoverse N2 and V1 cpus
MIPS,MIPS64:
- fixed autodetection of MSA capability
LOONGARCH64:
- added an optimized DGEMM kernel
====================================================================
Version 0.3.19
19-Dec-2021
general:
- reverted unsafe TRSV/ZRSV optimizations introduced in 0.3.16
- fixed a potential thread race in the thread buffer reallocation routines
that were introduced in 0.3.18
- fixed miscounting of thread pool size on Linux with OMP_PROC_BIND=TRUE
- fixed CBLAS interfaces for CSROT/ZSROT and CROTG/ZROTG
- made automatic library suffix for CMAKE builds with INTERFACE64 available
to CBLAS-only builds
x86_64:
- DYNAMIC_ARCH builds now fall back to the cpu with most similar capabilities
when an unknown CPUID is encountered, instead of defaulting to Prescott
- added cpu detection for Intel Alder Lake
- added cpu detection for Intel Sapphire Rapids
- added an optimized SBGEMM kernel for Sapphire Rapids
- fixed DYNAMIC_ARCH builds on OSX with CMAKE
- worked around DYNAMIC_ARCH builds made on Sandybridge failing on SkylakeX
- fixed missing thread initialization for static builds on Windows/MSVC
- fixed an excessive read in ZSYMV
POWER:
- added support for POWER10 in big-endian mode
- added support for building with CMAKE
- added optimized SGEMM and DGEMM kernels for small matrix sizes
ARMV8:
- added basic support and cputype detection for Fujitsu A64FX
- added a generic ARMV8SVE target
- added SVE-enabled SGEMM and DGEMM kernels for ARMV8SVE and A64FX
- added optimized CGEMM and ZGEMM kernels for Cortex A53 and A55 cpus
- fixed cpuid detection for Apple M1 and improved performance
- improved compiler flag setting in CMAKE builds
RISCV64:
- fixed improper initialization in CSCAL/ZSCAL for strided access patterns
MIPS:
- added a GENERIC target for MIPS32
- added support for cross-compiling to MIPS32 on x86_64 using CMAKE
MIPS64:
- fixed misdetection of MSA capability
====================================================================
Version 0.3.18
02-Oct-2021
general:
- when the build-time number of preconfigured threads is exceeded
at runtime (typically by an external program calling BLAS functions
from a larger number of threads in parallel), OpenBLAS will now
allocate an auxiliary control structure for up to 512 additional
threads instead of aborting
- added support for Loongson's LoongArch64 cpu architecture
- fixed building OpenBLAS with CMAKE and -DBUILD_BFLOAT16=ON
- added support for building OpenBLAS as a CMAKE subproject
- added support for building for Windows/ARM64 targets with clang
- improved support for building with the IBM xlf compiler
- imported Reference-LAPACK PR 625 (out-of-bounds reads in ?LARRV)
- imported Reference-LAPACK PR 597 for testsuite compatibility with
LLVM's libomp
x86_64:
- added SkylakeX S/DGEMM kernels for small problem sizes (M*N*K<=1000000)
- added optimized SBGEMM for Intel Cooper Lake
- reinstated the performance patch for AVX512 SGEMV_T with a proper fix
- added a workaround for a gcc11 tree-vectorizer bug that caused spurious
failures in the test programs for complex BLAS3 when compiling at -O3
(the default for cmake "release" builds)
- added support for runtime cpu count detection under Haiku OS
- worked around a long-standing miscompilation issue of the Haswell DGEMV_T
kernel with gcc that could produce NaN output in some corner cases
POWER:
- improved performance of DASUM on POWER10
ARMV8:
- fixed crashes (use of reserved register x18) on Apple M1 under OSX
- fixed building with gcc releases earlier than 5.1
MIPS:
- fixed building under BSD
MIPS64:
- fixed building under BSD
====================================================================
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