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Qualcomm pitched Znew quite a while ago. It mostly ditched 16-bit instructions and added a bunch of instructions that were basically ripped straight from ARM64.
by hajile 2y ago
Qualcomm pitched Znew quite a while ago. It mostly ditched 16-bit instructions and added a bunch of instructions that were basically ripped straight from ARM64.
The idea was obviously an attempt at making it as easy as possible to replace ARM with RISC-V without having to rework much of the core.
https://lists.riscv.org/g/tech-profiles/attachment/332/0/code_size_extension_rvi_20231006.pdf https://lists.riscv.org/g/tech-profiles/attachment/332/0/cod...
- snvzz 2y agoAn attempt that failed miserably. (it was formally rejected a year ago) But, by now, it is expected that Qualcomm's RISC-V designs have been re-aligned to match the reality that Qualcomm does not control the standard.
- dwaite 2y agoActually, it was an attempt to reuse as much of the ARM design they got when they bought Nuvia moving to a different CPU architecture. They were worried about ASIC design not software code.