[brucehoult]

Heh. The use of `vslidedown` was also what drew my eyes. But in my case the thoughts were "that's supposed to be a pretty slow instruction, included mostly for debuggers to use".

I wonder if they've run it on any actual RVV 1.0 hardware. I guess probably in an FPGA.

Tempted to convert that to RVV 0.7.1 and submit it...

[camel-cdr]

> Tempted to convert that to RVV 0.7.1 and submit it

Have you seen https://arxiv.org/abs/2304.10324 yet?

Here is their script: https://github.com/RISCVtestbed/rvv-rollback

[brucehoult]

Yup, I've seen that, and I've been in communication with Joseph and Maurice about one or two things recently.

[camel-cdr]

My thought was that `vslidedown` with an immediate 1 technically does less work than slide1down, and maybe they special cases that one in hardware, but that seems quite unlikely.

Edit: actually idk if there is a version of `vslidedown` that is allowed to set the values to an undefined state.