1Michael Wong Distinguished Engineer ● Chair of SYCL Heterogeneous Programming Language ● ISO C++ Directions Group past Chair ● Past CEO OpenMP ● ISOCPP.org Director, VP http://isocpp.org/wiki/ leading team developing HIP & CUDA backends for DPC++ Background in C++ programming models for heterogeneous systems Worked on ComputeCpp (SYCL) since its inception Contributor to the Khronos SYCL standard AI/Tensor HW Other BackendsSYCL 2020 is here! Open Standard for Single Source C++ Parallel Heterogeneous Programming SYCL 2020 is released after 3 years of intense work Significant adoption in Embedded

FPGAs AMD GPUs Any CPU SYCL enables Khronos to influence ISO C++ to (eventually) support heterogeneous compute SYCL, OpenCL and SPIR-V, as open industry standards, enable flexible integration and more) Any CPU Experimental SYCL enables Khronos to influence ISO C++ to (eventually) support heterogeneous compute SYCL, OpenCL and SPIR-V, as open industry standards, enable flexible integration and MobileyeSYCL IR ON COMPILER EXPLORERhttps://godbolt.org/z/jdhKr7e5rExpressiveness and simplicity for heterogeneous programming in modern C++ New Features Unified Shared Memory | Parallel Reductions | Subgroup

unicode paths in dra� P2845 Formatting of std::filesystem::path #include <filesystem> filesystem::path p("/usr/bin"); print("{}", p); p = filesystem::path("multi\nline"); cout << std::format("{}", 59Associative Containers - misc improvements P2363 Extending associative containers with the remaining heterogeneous overloads P1901 Enabling the Use of weak_ptr as Keys in Unordered Associative Containers 60Library

on<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection SupportC++23 Core Language6 Agenda  C++23 on<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection Support7 Explicit Object Parameters  Instead on<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection Support13 if consteval  Syntax: if consteval

and numerics. Contribution into SYCL Michael Wong Distinguished Engineer ● Chair of SYCL Heterogeneous Programming Language ● ISO C++ Directions Group past Chair ● Past CEO OpenMP ● ISOCPP.org Director deal with Parallel code Even fewer deal with Concurrent, event driven code None deal with Heterogeneous dispatch code There is always going to be: • Dirty data, faulty HW, integrity problems • NEED NEED Freedom from interference, which is much harder in multithread system • Heterogeneous-> AI/ML safety Stage 1: extensive deep analysis of 81 rules • Started in 2019 at a MISRA meeting • Why are

boost::units::dimensionless_type>, boost::units::heterogeneous_systemheterogeneous_system_implheterogeneous_system_dim, boost::units::heterogeneous_system< boost::units::heterogeneous_system_implheterogeneous_system_dim< boost::units::scaled_base_unit

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the normal way to design and architect systemsThe “normal way” • Classes/structs of members of heterogeneous types: won’t ever map efficiently to the computing resources • The use of pointers for objects BeginsColumnar Representation (Scattering) • Transforming collections of structs of members of heterogeneous types into one structure with arrays of homogeneous data types (going from what in databases id; double price; Specials *specials; Category *category; bool is_homemade; }; Heterogeneous (different) data types Pointer. Can it be null? Optional? Necessary but performance-hostile

=> {8, 10, 12, 15} 85PART 6 PART 6 Cetology Cetology a bit of fun 86WHAT ABOUT HETEROGENEOUS WHAT ABOUT HETEROGENEOUS SEQUENCES? SEQUENCES? Can we make Can we make cartesian_product cartesian_product of applicative instances from this talk: std::optional std::expected ranges (homogeneous and heterogeneous) zip cartesian product parsing continuations 114CONCLUSION CONCLUSION Things I didn't have

coroutine transfer Implement a scheduler 22A new heterogeneous TGPS using C++ Coroutine? Abstract away C++ Coroutine detailsA new heterogeneous TGPS using C++ Coroutine? Abstract away C++ Coroutine

Type-based TMP ( - Type-based TMP ( -> -> , ...) , ...) - Heterogeneous-based TMP ( - Heterogeneous-based TMP ( -> -> ) - Value-based TMP ( - Value-based