[FFmpeg-devel] [PATCH] lavc/h264chroma: RISC-V V add motion compensation for 4xH and 2xH chroma blocks

Arnie Chang arnie.chang at sifive.com
Sat Jun 10 19:43:52 EEST 2023

On Sat, Jun 10, 2023 at 10:55 PM Lynne <dev at lynne.ee> wrote:

> Why do they all have the same timing?

The processing procedure for these workloads is the same,
except for the difference in block width. (8xH, 4xH, 2xH)
So, the number of instructions remains constant.
Since these workloads handle a small amount of data each time,
the cycle count also stays the same.
However, if the quantity increases, instructions may involve more
which affects the cycle count (workloads with larger block width may take
more cycles).

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