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| author | Rémi Denis-Courmont <remi@remlab.net> | 2022-10-03 18:06:42 +0300 |
|---|---|---|
| committer | Lynne <dev@lynne.ee> | 2022-10-13 10:17:38 +0200 |
| commit | 96a83ceea434911d825223eaafa0f999e2a9d1fa (patch) | |
| tree | 42b07b034ab3cdd10b933c14c71b2300637f2d91 /RELEASE | |
| parent | 28ac2279adb860ea8b90d3073603912bf3eb6a83 (diff) | |
| download | ffmpeg-96a83ceea434911d825223eaafa0f999e2a9d1fa.tar.gz | |
riscv: fix scalar product initialisation
VSETVLI xd, x0, ...' has rather nonobvious semantics:
- If xd is x0, then it preserves the current vector length.
- If xd is not x0, it sets the vector length to the supported maximum.
Also somewhat confusingly, while VMV.X.S always does its thing
regardless of the selected vector length, VMV.S.X does _nothing_ if the
selected vector length is zero.
So the current code breaks fails to initialise the accumulator if we
are unlucky to have a selected vector length of zero on entry. Fix it
by forcing the vector length to one.
Diffstat (limited to 'RELEASE')
0 files changed, 0 insertions, 0 deletions