From: "Rémi Denis-Courmont" <remi@remlab.net> To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org> Subject: Re: [FFmpeg-devel] [PATCH] RISC-V:update ff_get_cpu_flags_riscv for RVV Date: Sat, 15 Mar 2025 11:03:09 +0700 Message-ID: <413CE245-1F59-4222-B0C6-599C65390B13@remlab.net> (raw) In-Reply-To: <20250314103257.3584723-1-daichengrong@iscas.ac.cn> Hi, Le 14 mars 2025 17:32:57 GMT+07:00, daichengrong@iscas.ac.cn a écrit : >From: daichengrong <daichengrong@iscas.ac.cn> > >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(). 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. And we don't care about libc context support, since vectors are clobbered by function calls, e.g. for long jumps or ucontext. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
prev parent reply other threads:[~2025-03-15 4:03 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2025-03-14 10:32 daichengrong 2025-03-15 4:03 ` Rémi Denis-Courmont [this message]
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