You mean RISC-V or MIPS? There's a reason why I said SIMD/vector extension, since RISC-V first started down the SIMD route, but then they took a step back and

You mean RISC-V or MIPS? There's a reason why I said SIMD/vector extension, since RISC-V first started down the SIMD route, but then they took a step back and decided that a vector extension might work better, so from what I can tell more work has been going into the vector extension than SIMD. But neither SIMD nor the vector extension are finalized yet. I'm unaware of a MIPS vector extension, it seems to just have standard packed SIMD instructions, though I'm not that familiar with MIPS.