RISC-V: added vectorized soft AES

[SChernykh]

Activated when compiling with -DARCH=native

Before: 102.5 h/s, after: 107 h/s

Tested on Orange Pi RV2 and got a 2.2x speedup for soft AES itself, but overall speedup was only 4% because it's bottlenecked by memory access.

Note: --randomx-1gb-pages is crucial to get max hashrate on Orange Pi RV2

@Slayingripper

[Slayingripper]

I've switched to using to an NVME , the biggest difference I've seen is start up time when running xmrig. I'll see if i can edit the

I've enabled huge pages by also editig the uboot config file added this line:

extraargs=default_hugepagesz=1G hugepagesz=1G hugepages=3

I have some other stuff running on this machine, so it's not completely clean as I use it for other things as well (Docker). But any enhancement is always welcome.

[SChernykh]

1gb pages worked for me just by using sudo and --randomx-1gb-pages in the command line, but I don't run anything on that board. Also, having copper heatsinks on CPU and memory helps a lot with hashrate and stability.

[Slayingripper]

1gb pages worked for me just by using sudo and --randomx-1gb-pages in the command line, but I don't run anything on that board. Also, having copper heatsinks on CPU and memory helps a lot with hashrate and stability.

I also have a heatsink with a fan. But in any case, improvement is always good.