Adventures in SIMD Thinking (Part 2 of 2) Bob Steagall CppCon 2020 K E W B C O M P U T I N GCopyright © 2020 Bob Steagall K E W B C O M P U T I N G Agenda • Learn a little about Intel's SIMD facilities Faster (?) UTF-8 to UTF-32 conversion (with AVX2) • No heavy code, but lots of pictures • Thinking "vertically" CppCon 2020 - Adventures in SIMD Thinking 2Copyright © 2020 Bob Steagall Small-Kernel Convolution S = s0 s1 s2 s3 s4 s5 s6 ... K = k0 k1 k2 r0 = ... r1 = s0k0 + s1k1 + s2k2 r2 = s1k0 + s2k1 + s3k2 r3 = s2k0 + s3k1 + s4k2 r4 =

Back to Basics Designing Classes (part 1 of 2) Klaus Iglberger, CppCon 2021 klaus.iglberger@gmx.de2 Klaus Iglberger C++ Trainer/Consultant Author of the C++ math library (Co-)Organizer (Co-)Organizer of the Munich C++ user group Chair of the CppCon B2B and SD tracks Email: klaus.iglberger@gmx.deContent 3 Back to Basics: Class Design (Part 1) The Challenge of Class Design Design Testability Implementation Guidelines Resource Management Back to Basics: Class Design (Part 2) Implementation Guidelines Data Member Initialization Implicit Conversions Order of Data Members

if (NOT TARGET Catch2) project(Catch2 CXX) set(CMAKE_CXX_STANDARD 11) add_library(${PROJECT_NAME} INTERFACE) target_include_directories(${PROJECT_NAME} INTERFACE ${CMAKE_CU ${CMAKE_CURRENT_SOURCE_DIR}/include) # Mimic the library names in Catch2's own CMake files: add_library(Catch2::Catch2 ALIAS Catch2) # This one is historical, left over from when ApprovalTests.cpp was first created. # We could encourage users to move away from it. add_library(catch2 ALIAS Catch2) endif ()

Back to Basics: Templates – Part 2 Bob Steagall CppCon 2021CppCon 2021 – Back to Basics: Templates – Part 2 Copyright © 2021 Bob Steagall Recap: Templates • C++ supports generic programming with templates function templates • Alias template • Variable templates • Lambda templates 2CppCon 2021 – Back to Basics: Templates – Part 2 Copyright © 2021 Bob Steagall Recap: Translation Units • In C++, translation preprocessing directives (#ifdef) • And all macros expanded 3CppCon 2021 – Back to Basics: Templates – Part 2 Copyright © 2021 Bob Steagall Recap: Declarations and Definitions • A name is an identifier that denotes

github.com/griswaldbrooks/spanny2github.com/griswaldbrooks/spanny2 DISCLAIMER: C++23… ish 2 https://github.com/kokkos/mdspangithub.com/griswaldbrooks/spanny2 goals ● deeper understanding of std::mdspan custom layouts and accessors ● dispel common misconceptions about both 3github.com/griswaldbrooks/spanny2 how ● layouts and their requirements ● occupancy grids and default layouts ● submaps, strides, submdspan 4 ● motivations for std::mdspan ● review std::mdspan declarationgithub.com/griswaldbrooks/spanny2 how ● layouts and their requirements ● occupancy grids and default layouts ● submaps, strides, submdspan

Adventures in SIMD Thinking (Part 1 of 2) Bob Steagall CppCon 2020 K E W B C O M P U T I N GCopyright © 2020 Bob Steagall K E W B C O M P U T I N G Agenda • Learn a little about Intel's SIMD facilities Faster (?) UTF-8 to UTF-32 conversion (with AVX2) • No heavy code, but lots of pictures • Thinking "vertically" CppCon 2020 - Adventures in SIMD Thinking 2Copyright © 2020 Bob Steagall K E W B C O M P load_from(float const* psrc) { return _mm512_loadu_ps(psrc); } m0 m1 m2 m3 m4 m5 m6 m7 m8 m9 m10 m11 m12 m13 m14 m15 m0 m1 m2 m3 m4 m5 m6 m7 m8 m9 m10 m11 m12 m13 m14 m15 psrcCopyright © 2020 Bob Steagall

Andreas Fertig https://AndreasFertig.Info post@AndreasFertig.Info @Andreas__Fertig B2B: C++ Templates Part 2 Variadic templates: Parameter pack ■ Syntax: A typename|class... Ts generates a type template arguments passed. D ts... in the body of a function to unpack the arguments. 1 template2 typename... Ts A Variadic template 3 > 4 constexpr auto 5 min(const T& a, 6 const T& b, 7 const Ts& return m; 17 } 18 19 static_assert(min(3, 2, 3, 4, 5) == 2); 20 static_assert(min(3, 2) == 2); Andreas Fertig v1.0 B2B: C++ Templates 2 B2B: C++ Templates ­ Part 2 © 2020 Andreas Fertig https://AndreasFertig

© 2021. 2 2 © 2021. 3 Agenda 1.Don’t we already have a Concurrency TS? • Why do we need a new one? • implementation status 2.TS2 Hazard Pointer • how I learn to love C++ tricks 3.TS2 RCU • From 2021. 7 Talking about HP and RCU since 2014 1.Erwin Schrödinger’s Zoo and Werner Heisenberg’s advice 2.Increase uncertainty to get performance and scalability 3.So Procrastinate away! Use Structured Deferral as part of your decision process ● direction@lists.isocpp.org. © 2021. 13 What is in Concurrency TS2? • Several synchronization primitives for locked-free programming on concurrent data structures. These

1 《深入浅出MFC》2/e 电子书开放自由下载 声明 致亲爱的大陆读者 我是侯捷（侯俊杰）。自从华中理工大学于1998/04 出版了我的《深入浅出MFC》 1/e 简体版（易名《深入浅出Windows MFC 程序设计》）之后，陆陆续续我 收到了许多许多的大陆读者来函。其中对我的赞美、感谢、关怀、殷殷垂询， 让我非常感动。 《深入浅出MFC》2/e 早已于1998/05 于台湾出版。之所以迟迟没有授权给大 繁体版出版时，2/e 简体版恐怕还未能完成。老是让 大陆读者慢一步看到我的书，令我至感难过，所以便请松岗公司不要进行2/e 简 体版之授权，直接等3/e 出版后再动作。没想到一拖经年，我的3/e 写作计划 并没有如期完成，致使大陆读者反而没有《深入浅出MFC》2/e 简体版可看。 《深入浅出MFC》3/e 没有如期完成的原因是，MFC 本体架构并没有什么大改 变。《深入浅出MFC》2/e 书中 之画面或功能可能有些微变化）。 由于《深入浅出MFC》2/e 并无简体版，因此我时时收到大陆读者来信询问购 买繁体版之管道。一来我不知道是否台湾出版公司有提供海外邮购或电购，二 来即使有，想必带给大家很大的麻烦，三来两岸消费水平之差异带给大陆读者 的负担，亦令我深感不安。 1. 这个文档是从侯捷网站提供的繁体板简体化过来的。 2. 由于排版问题，有些繁体说法在换行时候没有被替换，所以遇到问题大家可以对照原文比较一下。

Back to Basics Designing Classes (part 1 of 2) Klaus Iglberger, CppCon 2021 klaus.iglberger@gmx.de2 Klaus Iglberger C++ Trainer/Consultant Author of the C++ math library (Co-)Organizer (Co-)Organizer of the Munich C++ user group Chair of the CppCon B2B and SD tracks Email: klaus.iglberger@gmx.deContent 3 Back to Basics: Class Design (Part 1) The Challenge of Class Design Design Testability Implementation Guidelines Resource Management Back to Basics: Class Design (Part 2) Implementation Guidelines Data Member Initialization Implicit Conversions Order of Data Members