Change #252293

Category	ffmpeg
Changed by	Rémi Denis-Courmont <remiohnoyoudont@remlab.net>
Changed at	Mon 15 Dec 2025 17:35:58
Repository	https://git.ffmpeg.org/ffmpeg.git
Project	ffmpeg
Branch	master
Revision	acb38d320b3d5bfd963ff9a20daf56d6cab944ec

Comments

lavc/llvidencdsp: fix R-V V sub_left_predict
The code assumed that the destination buffer was zeroed, a misbehaviour
with which checkasm is bug-compatible as it zeroes the destination
buffer. The fixed code is even faster:

SpacemiT X60:
sub_left_predict_c:                                  51792.5 ( 1.00x)
sub_left_predict_rvv_i32:                             3504.4 (14.78x)

Changed files

libavcodec/riscv/llvidencdsp_rvv.S