Hi, Le 20 mars 2025 11:27:39 GMT+02:00, daichengrong <daichengr...@iscas.ac.cn> a écrit : >>> Availability of RVV and ZVBB should be determined with dl_hwcap. >> No. That's completely superfluous since we already check for kernel support >> with hwprobe(). >No. If the operating system does not enable dl_hwcap support for rvv, an >illegal instruction exception will be reported , even if the hardware and >kernel support RVV.
And so what? >> And we can't check for Zb* and Zv* with hwcap anyhow. >> >>> As those extensions rely on vector registers, kernel vector support >>> is required to save the state of context switching. >> No. Kernel context switching is already ascertained. >No. The kernel will not save and restore vector registers if the program does >not use vector instructions. That optimisation is a kernel implementation detail that is completely irrelevant to the subject matter. I still completely fail to see any justification for this patch. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
