CNLohr on YouTube discusses making a very small RISC-V emulator.
mini-rv32ima is a single-file-header, mini-rv32ima.h, in the STB Style library that:
Implements a RISC-V rv32ima/Zifencei+Zicsr (and partial su), with CLINT and MMIO.
Is about 400 lines of actual code.
Has no dependencies , not even libc.
Is easily extensible . So you can easily add CSRs, instructions, MMIO, etc!
Is pretty performant . (~450 coremark on my laptop, about 1/2 the speed of QEMU)
Is human-readable and in basic C code.
Is “incomplete ” in that it didn’t implement the tons of the spec that Linux doesn’t (and you shouldn’t) use.
Is trivially embeddable in applications.
See the video below and more on GitHub .
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