Re: [FFmpeg-devel] [PATCH 0/5] RISC-V: Improve H264 decoding performance using RVV intrinsic

2023-05-09 Thread Lynne
May 9, 2023, 11:51 by arnie.ch...@sifive.com: > We are submitting a set of patches that significantly improve H.264 decoding > performance > by utilizing RVV intrinsic code. The average speedup(FPS) achieved by these > patches is more than 2x, > as experimented on 720P videos running on an inter

Re: [FFmpeg-devel] [PATCH 0/5] RISC-V: Improve H264 decoding performance using RVV intrinsic

2023-05-09 Thread Rémi Denis-Courmont
Hi, Le tiistaina 9. toukokuuta 2023, 12.50.25 EEST Arnie Chang a écrit : > We are submitting a set of patches that significantly improve H.264 decoding > performance by utilizing RVV intrinsic code. I believe that there is a general dislike of compiler intrinsic for vector optimisations

Re: [FFmpeg-devel] [PATCH 0/5] RISC-V: Improve H264 decoding performance using RVV intrinsic

2023-05-10 Thread Arnie Chang
Hi Lynne I fully respect the policy and understand the disadvantages of intrinsic code. Considering the benefits of the open ISA like RISC-V, the intrinsic code should still have a better chance of being optimized by the compiler for hardware variants. At this moment, the intrinsic implementation

Re: [FFmpeg-devel] [PATCH 0/5] RISC-V: Improve H264 decoding performance using RVV intrinsic

2023-05-10 Thread Lynne
May 10, 2023, 10:47 by arnie.ch...@sifive.com: > Hi Lynne > > I fully respect the policy and understand the disadvantages of intrinsic > code. > Considering the benefits of the open ISA like RISC-V, > the intrinsic code should still have a better chance of being optimized by > the compiler for har

Re: [FFmpeg-devel] [PATCH 0/5] RISC-V: Improve H264 decoding performance using RVV intrinsic

2023-05-10 Thread Rémi Denis-Courmont
Hi, Le 10 mai 2023 11:46:57 GMT+03:00, Arnie Chang a écrit  : >Considering the benefits of the open ISA like RISC-V, >the intrinsic code should still have a better chance of being optimized by >the compiler for hardware variants. You probably have access to proprietary performance information of