OpenBLAS 0.3.27 version

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

md5sum
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4b85246b10d61f362fe8b9b45cd145f0 OpenBLAS-0.3.27.zip
317c6c4f93f233d8be8ea0ad6fd7979e OpenBLAS-0.3.27-x64-64.zip
2b8d25e6a01ad4830ecca4e521172b02 OpenBLAS-0.3.27-x64.zip
c59038e5ea36ee431f5cb7f5de8bf9d9 OpenBLAS-0.3.27-x86.zip