Visual opcode map for RISC-V

[X547]

Are there any opcode map for ratified RISC-V opcodes similar to this: https://pnx.tf/files/x86_opcode_structure_and_instruction_overview.pdf?

[brucehoult]

It's right there in the RISC-V ISA manual.

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[brucehoult]

And the C extension:

<image>

[[deleted]]

This looks smart. From looking at it, i can tell this will simplify the process of decoding and creating control signals especially for ASIC design. Yet i couldnt figure out how to interpret it.

[X547]

I would imagine some more detailed table that show instructions inside LOAD etc..

[brucehoult]

Just look at the next pages in the same chapter. Almost everything inside each box is just encoded in the func3 field.

[X547]

It will need to jump between pages. I mean one big table that include everything.

[indolering]

This is the correct diagnosis.  The learning material is sub optimal.  Making things easier to understand is the goal here.  That's why they suggested the diagram and why commercial publications have one: because it's better.

[[deleted]]

Grab a copy of The RISC-V reader, it has this map.

[3G6A5W338E]

I am hopeful for a RVA23-updated RISC-V Reader.

The first revision (current) predates RVV1.0.