Panel: Toolchains & Runtime

on YouTube ↗40m

" summary

Panel reports that RISC-V’s scalable vector v1.0 work-in-progress brings many instructions but real compiler gaps remain: segmented loads/stores are awkward, vsetvl sideband bits block optimizations, and LLVM auto-vectorization is still naive while GCC is more stable. Practical fixes include intrinsics, builtin APIs, linker/ABI tweaks and indirect functions dispatch for multiple implementations. A public riscv-test.org CI runs weekly cross-compiler builds. Missing pieces for HPC: tuned BLAS/LAPACK/Trilinos, OpenUCX/InfiniBand drivers. Early bitmanip boosts string ops to ~6–7 cycles per word.

AI-written summary · about

" chapters (15)

1. 0:00Intro
2. 1:00Vector Extensions
3. 1:50State of Vector Support
4. 3:10Vector Length Specific Support
5. 6:20LVM Support
6. 6:55Use Cases
7. 8:15Hand Optimization
8. 8:50Vector Support
9. 9:50Same Splitter
10. 11:30Extensions
11. 16:20Extension Policy
12. 21:45String Functions
13. 24:40Multiple Functions
14. 28:50Libraries
15. 31:20Roadmap

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