OSDT Weekly 第252期

近期活动

编译社区的八卦信息

• C++ 中文周刊，未更新，上期是第 155 期

GCC

• GCC 14.1 Release Candidate available from gcc.gnu.org https://gcc.gnu.org/pipermail/gcc/2024-April/243853.html

• [committed] [RISC-V] Improve floor, ceil & related operations for RISC-V https://gcc.gnu.org/pipermail/gcc-patches/2024-May/650363.html

• [PATCH 0/6] btf: refactor and add pruning option https://gcc.gnu.org/pipermail/gcc-patches/2024-May/650372.html

• [PATCH v2] docs: Update function multiversioning documentation https://gcc.gnu.org/pipermail/gcc-patches/2024-April/650267.html

• [PATCH 00/16] prange supporting patchset https://gcc.gnu.org/pipermail/gcc-patches/2024-April/650137.html

• [wwwdocs] Porting-to-14: Mention new pragma GCC Target behavior (AVX2) https://gcc.gnu.org/pipermail/gcc-patches/2024-April/650013.html

• [PATCH] arm: Zero/Sign extends for CMSE security https://gcc.gnu.org/pipermail/gcc-patches/2024-April/649973.html

Binutils/GDB

• [PATCH] Support APX zero-upper https://sourceware.org/pipermail/binutils/2024-April/133900.html

• [PATCH 0/2] Add SCFI support for aarch64 https://sourceware.org/pipermail/binutils/2024-May/133931.html

• [PATCH 0/3] x86: Optimize the encoder of the vvvv register https://sourceware.org/pipermail/binutils/2024-April/133835.html

• PPC maintainers (Alan Modra在IBM从事PPC工具链开发数十年，退休了） https://sourceware.org/pipermail/binutils/2024-April/133832.html

• [PATCH v3] LoongArch: gas: Simplify relocations in sections without code flag https://sourceware.org/pipermail/binutils/2024-April/133775.html

• GDB 15.1 release update (2024-04-28) https://sourceware.org/pipermail/gdb-patches/2024-April/208668.html

GLBC

• [PATCH v6 0/3] RISC-V: Implement TLS Descriptors https://sourceware.org/pipermail/libc-alpha/2024-April/156417.html

• [PATCH] aarch64: Fix AdvSIMD libmvec routines for big-endian https://sourceware.org/pipermail/libc-alpha/2024-April/156407.html

• [PATCH] linux: Add openat2 (BZ 31664) https://sourceware.org/pipermail/libc-alpha/2024-April/156289.html

• Computing x86 ISA level at configure time https://sourceware.org/pipermail/libc-alpha/2024-April/156252.html

LLVM/Clang/LLDB/LLD

本节内容来自 LLVM Weekly 第 539 期， Alex Bradbury 大哥持续稳定输出。

• 宋教授笔耕不缀： Fangrui Song blogged about the removal of -mrelax-all from -O0.

• 想去： The next Zurich Compiler Social will take place on May 14th and feature the talk "Computing Bounds of SSA Values in MLIR" by Matthias Springer.

• 去么？ The next Cambridge UK LLVM social will take place on 16th May.

• 基础设施迁移伴随着开发协作规则要调整： Tom Stellard and Kristof Beyls posted an RFC proposal to require pull request for contributions, motivated by concerns that without this it isn't possible to see who actually pushed a commit to the repo. An important point to highlight is that it would still be possible to commit without pre-commit review via a helper script that creates a PR and mrges it. I think it's fair to say that response has been mixed so far, with plenty of people offering support but also plenty expressing concerns about adding additional friction or breaking workflows.

• 国内的朋友？： Huihui Zhang shared an idea for a pass (with prototype implementation) to replace expensive array index computation with precomputed array lookup.

• 统一了是件好事： llvm-objdump now prints disassembled RISC-V instructions in the same byte order as GNU objdump. b27f86b.

• Arm更新： The AArch64 Neoverse-{N3,V3,V3AE} are now supported. a670cda.

• RISC-V伙伴注意： -mrelax-all is no longer enabled for O0 on RISC-V. 6b1b4c1.

• 随着AI兴起的「半精度」：Bfloat16 intrinsics for the RISC-V Zvfbf* vector extensions are now supported. 3fa6b9c.

QEMU (RISC-V)

• [PATCH] target/riscv/kvm: implement SBI debug console (DBCN) calls, https://lists.gnu.org/archive/html/qemu-riscv/2024-04/msg00347.html

• [PATCH v5] riscv: thead: Add th.sxstatus CSR emulation, https://lists.gnu.org/archive/html/qemu-riscv/2024-04/msg00436.html

• [PATCH 0/3] Assorted fixes for PMU, https://lists.gnu.org/archive/html/qemu-riscv/2024-04/msg00445.html

RISC-V in China

• 五一放假，风平浪静。

RT-Thread 社区

• 风平浪静。招募志愿者小编。

TVM / AI Compilers

• 风平浪静。招募志愿者小编。

本周工具链岗位

往期社招及实习生招聘长期有效。

• 开源实习岗位2024春季上新！PLCT实验室开放多个编译器开源实习岗位

本周推荐阅读

本周推荐：《故事技巧》

作者： Jack hart 译者： 叶青、曾轶峰 推荐： 小编1号

作为一名理科学生，进入社会多年，越发体会到了语文写作的重要性。我们日常生活中，不管是工作还是工作之外，绝大多数时间都是在做与其他人类沟通的行为。而在表达和理解的范围内，以故事的形式讲述，又是更为重要和图书的一种技能。

几乎不会有人生来就是讲故事的天才，都是需要——也可以——通过不断的练习总结得到自己熟悉惯用并且好用的模式。这本《故事技巧：舒适性非虚构文学写作指南》适合已经开始写了一段时间文字——开始写出第一段文字是写作最为困难的部分——有了一份初稿之后不知道如何改进的新人写作者阅读。写作者需要尝试，不管的调整叙事的故事线、视角，不断的去尝试各种组合，同时又要满足写作中一些特定的约束，使得读者顺着写作者提供的视角，不断的感受到故事的张力，达到最高点。

没有任何一本书可以让你突然变成故事大师。用一个可能不算恰当的比喻，写作就像是用机械单反相机拍照，而本书告诉你相机有哪些光圈快门可以调整。而想要拍摄的景色在哪里、希望通过何种画面传达出出什么样的内涵，则是需要写作者独立完成的。