Hi, If you are just planning on introducing a single register, you could consider extending the number of IntRegs, or to add this extra register as a MiscReg (but be careful in the latter case, as MiscRegs are not renamed).
If you really want to define a new register class, we have recently pushed some patches which are implementing FEAT_SME in gem5 by adding matrix registers. I suggest you have a look at the following patches: https://gem5-review.googlesource.com/c/public/gem5/+/64333/1 https://gem5-review.googlesource.com/c/public/gem5/+/64334/1 You could use them as an example/to get an idea on what should be done Kind Regards Giacomo From: 等价无穷小 via gem5-users <gem5-users@gem5.org> Date: Tuesday, 29 November 2022 at 11:15 To: gem5-users <gem5-users@gem5.org> Cc: 等价无穷小 <zhang...@foxmail.com> Subject: [gem5-users] Add custom Register In ARM Hi all, Recently, I wanted to add a new custom register in gem5, and the load/store instruction can take the custom register as src/dest register to move data from memory. Is there some suggestions about this? And I have some confusion about the register implementation in gem5. In src/cpu/reg_class.hh/cc file, defining the RegClass and RegId class, if I add a new custom register, should I add a new Regclass, like CustomClass, and give it new RegId? And in the src/arch/arm, there are five files about the register: ccregs.hh、intregs.hh、miscregs.hh/cc 、registers.hh .In these files, everyone of these file almost enumorate the RegIndex, I understand it just a signature of a register, how can i map the register to the signature? Thanks, ZhangMeng IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.
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