e6cc2a3e22
Existing Design: - GEMM AVX2 kernel performs computation and updates temporary C buffer - Portion of temporary C buffer is copied to output C buffer based on UPLO parameter - For diagonal blocks, using GEMM kernels is not efficient New Design: Implemented in current patch when UPLO='L' - GEMMT kernel used for computation, temporary buffer is not required. - Only required elements are computed using mask load store for all fringe cases - Exception: AVX2 code path is used when storage format is RRC, CRR, CRC - AOCL-Dynamic is added based on dimension - Check for AVX platform is added in SUP interface, It returns to native implementation if hardware doesnot support AVX platform - SUP ref_var2m is expanded for dcomplex datatype to avoid condition check which exists for double datatype AMD_Internal: [CPUPL-5006] Change-Id: I3e21404b732b8f2df9cbdba394303752fdf36286
AOCL-BLAS library
AOCL-BLAS is AMD's optimized version of BLAS targeted for AMD EPYC and Ryzen CPUs. It is developed as a forked version of BLIS (https://github.com/flame/blis), which is developed by members of the Science of High-Performance Computing (SHPC) group in the Institute for Computational Engineering and Sciences at The University of Texas at Austin and other collaborators (including AMD). All known features and functionalities of BLIS are retained and supported in AOCL-BLAS library. AOCL-BLAS is regularly updated with the improvements from the upstream repository.
AOCL BLAS is optimized with SSE2, AVX2, AVX512 instruction sets which would be enabled based on the target Zen architecture using the dynamic dispatch feature. All prominent Level 3, Level 2 and Level 1 APIs are designed and optimized for specific paths targeting different size spectrums e.g., Small, Medium and Large sizes. These algorithms are designed and customized to exploit the architectural improvements of the target platform.
For detailed instructions on how to configure, build, install, and link against AOCL-BLAS on AMD CPUs, please refer to the AOCL User Guide located on AMD developer portal.
The upstream repository (https://github.com/flame/blis) contains further information on BLIS, including background information on BLIS design, usage examples, and a complete BLIS API reference.
AOCL-BLAS is developed and maintained by AMD. You can contact us on the email-id toolchainsupport@amd.com. You can also raise any issue/suggestion on the git-hub repository at https://github.com/amd/blis/issues.