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chipsalliance / Cores-VeeR-EH1

VeeR EH1 core
Apache License 2.0
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question about adding custom instructions #79

Closed feiger313 closed 4 years ago

feiger313 commented 4 years ago

hi, l saw some infomation in README.md .:"If adding/removing instructions, espresso must be installed (used by tools/coredecode)". Can this increase the custom instructions ，and how to use this script .

Codasip commented 4 years ago

If you want to "increase the custom instructions" of SweRV core you have to describe them in espresso input format and update existing decoder logic in SweRV core. Assuming you have available all resources your custom instructions need.

Espresso or better said espresso-logic is used to minimize boolean functions. It is used to generate decoder logic from your customized instruction code input. Input format and the way how to use espresso is described in its man pages. SweRV Cores Support Package ( https://github.com/chipsalliance/Cores-SweRV-Support-Package ) contains already installed espresso integrated with SweRV EH1 core and tools. There is also included description of all Espresso functions.

feiger313 commented 4 years ago

thank you for your help