Is that still happening after SiFive let go a bunch of staff recently? https://n...

davidlt · on Dec 10, 2023

To my understanding SiFive continues to offer their selection of core IP. Anyways, I would assume any existing contract would have to be fulfilled for various legal reasons.

SG2042 itself is T-HEAD C920 design which is a mess, and might not be even called a RISC-V compliant design. We are kinda stuck it existing and being used in various chips. There are other design issues discovered IIRC (atomic might not work properly [at least on the kernel side workarounds required]; floating point failures in glibc testsuite because FP not being compliant). SG2044 is scheduled for the next year (2024). Not many details are known: 64 cores, 8 DDR controller, 3x memory bandwidth, vector v1.0 support, 2x PCIe (unknown what that means, Gen3 -> Gen4? More lanes?). The cores are unknown, but SG2038 is SiFive P670. T-HEAD has C908 that support vectors v1.0 (and solves some other issues), but that's a smaller core. Not a replacement for C910/C920.

justinclift · on Dec 10, 2023

Thanks, that's good info. :)

photonbeam · on Dec 10, 2023

This is dated after the layoffs, so presumably yes

https://www.sifive.com/press/sophgo-licenses-sifive-risc-v-p...