Update Changelog.txt for 0.3.28
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Martin Kroeker
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Changelog.txt
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Changelog.txt
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OpenBLAS ChangeLog
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====================================================================
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Version 0.3.28
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8-Aug-2024
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general:
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- Reworked the unfinished implementation of HUGETLB from GotoBLAS
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for allocating huge memory pages as buffers on suitable systems
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- Changed the unfinished implementation of GEMM3M for the generic
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target on all architectures to at least forward to regular GEMM
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- Improved multithreaded GEMM performance for large non-skinny matrices
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- Improved BLAS3 performance on larger multicore systems through improved
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parallelism
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- Improved performance of the initial memory allocation by reducing
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locking overhead
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- Improved performance of GBMV at small problem sizes by introducing
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a size barrier for the switch to multithreading
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- Added an implementation of the CBLAS_GEMM_BATCH extension
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- Fixed miscompilation of CAXPYC and ZAXPYC on all architectures in
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CMAKE builds (error introduced in 0.3.27)
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- Fixed corner cases involving the handling of NAN and INFINITY
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arguments in ?SCAL on all architectures
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- Added support for cross-compiling to WEBM with CMAKE (in addition
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to the already present makefile support)
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- Fixed NAN handling and potential accuracy issues in compilations with
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Intel ICX by supplying a suitable fp-model option by default
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- The contents of the github project wiki have been converted into
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a new set of documentation included with the source code.
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- It is now possible to register a callback function that replaces
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the built-in support for multithreading with an external backend
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like TBB (openblas_set_threads_callback_function)
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- Fixed potential duplication of suffixes in shared library naming
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- Improved C compiler detection by the build system to tolerate more
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naming variants for gcc builds
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- Fixed an unnecessary dependency of the utest on CBLAS
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- Fixed spurious error reports from the BLAS extensions utest
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- Fixed unwanted invocation of the GEMM3M tests in cross-compilation
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- Fixed a flaw in the makefile build that could lead to the pkgconfig
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file containing an entry of UNKNOWN for the target cpu after installing
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- Integrated fixes from the Reference-LAPACK project:
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- Fixed uninitialized variables in the LAPACK tests for ?QP3RK (PR 961)
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- Fixed potential bounds error in ?UNHR_COL/?ORHR_COL (PR 1018)
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- Fixed potential infinite loop in the LAPACK testsuite (PR 1024)
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- Make the variable type used for hidden length arguments configurable (PR 1025)
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- Fixed SYTRD workspace computation and various typos (PR 1030)
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- Prevent compiler use of FMA that could increase numerical error in ?GEEVX (PR 1033)
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x86-64:
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- reverted thread management under Windows to its state before 0.3.26
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due to signs of race conditions in some circumstances now under study
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- fixed accidental selection of the unoptimized generic SBGEMM kernel
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in CMAKE builds for CooperLake and SapphireRapids targets
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- fixed a potential thread buffer overrun in SBSTOBF16 on small systems
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- fixed an accuracy issue in ZSCAL introduced in 0.3.26
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- fixed compilation with CMAKE and recent releases of LLVM
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- added support for Intel Emerald Rapids and Meteor Lake cpus
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- added autodetection support for the Zhaoxin KX-7000 cpu
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- fixed autodetection of Intel Prescott (probably broken since 0.3.19)
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- fixed compilation for older targets with the Yocto SDK
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- fixed compilation of the converter-generated C versions
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of the LAPACK sources with gcc-14
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- improved compiler options when building with CMAKE and LLVM for
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AVX512-capable targets
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- added support for supplying the L2 cache size via an environment
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variable (OPENBLAS_L2_SIZE) in case it is not correctly reported
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(as in some VM configurations)
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- improved the error message shown when thread creation fails on startup
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- fixed setting the rpath entry of the dylib in CMAKE builds on MacOS
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arm:
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- fixed building for baremetal targets with make
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arm64:
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- Added a fast path forwarding SGEMM and DGEMM calls with a 1xN or Mx1
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matrix to the corresponding GEMV kernel
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- added optimized SGEMV and DGEMV kernels for A64FX
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- added optimized SVE kernels for small-matrix GEMM
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- added A64FX to the cpu list for DYNAMIC_ARCH
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- fixed building with support for cpu affinity
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- worked around accuracy problems with C/ZNRM2 on NeoverseN1 and
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Apple M targets
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- improved GEMM performance on Neoverse V1
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- fixed compilation for NEOVERSEN2 with older compilers
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- fixed potential miscompilation of the SVE SDOT and DDOT kernels
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- fixed potential miscompilation of the non-SVE CDOT and ZDOT kernels
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- fixed a potential overflow when using very large user-defined BUFFERSIZE
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- fixed setting the rpath entry of the dylib in CMAKE builds on MacOS
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power:
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- Added a fast path forwarding SGEMM and DGEMM calls with a 1xN or Mx1
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matrix to the corresponding GEMV kernel
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- significantly improved performance of SBGEMM on POWER10
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- fixed compilation with OpenMP and the XLF compiler
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- fixed building of the BLAS extension utests under AIX
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- fixed building of parts of the LAPACK testsuite with XLF
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- fixed CSWAP/ZSWAP on big-endian POWER10 targets
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- fixed a performance regression in SAXPY on POWER10 with OpenXL
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- fixed accuracy issues in CSCAL/ZSCAL when compiled with LLVM
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- fixed building for POWER9 under FreeBSD
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- fixed a potential overflow when using very large user-defined BUFFERSIZE
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- fixed an accuracy issue in the POWER6 kernels for GEMM and GEMV
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riscv64:
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- Added a fast path forwarding SGEMM and DGEMM calls with a 1xN or Mx1
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matrix to the corresponding GEMV kernel
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- fixed building for RISCV64_GENERIC with OpenMP enabled
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- added DYNAMIC_ARCH support (comprising GENERIC_RISCV64 and the two
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RVV 1.0 targets with vector length of 128 and 256)
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- worked around the ZVL128B kernels for AXPBY mishandling the special
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case of zero Y increment
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loongarch64:
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- improved GEMM performance on servers of the 3C5000 generation
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- improved performance and stability of DGEMM
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- improved GEMV and TRSM kernels for LSX and LASX vector ABIs
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- fixed CMAKE compilation with the INTERFACE64 option set
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- fixed compilation with CMAKE
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- worked around spurious errors flagged by the BLAS3 tests
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- worked around a miscompilation of the POTRS utest by gcc 14.1
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mips64:
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- fixed ASUM and SUM kernels to accept negative step sizes in X
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- fixed complex GEMV kernels for MSA
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====================================================================
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Version 0.3.27
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4-Apr-2024
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