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riscv-boom reviews and mentions
- Is RISC-V ready for HPC? Evaluating the 64-core Sophon SG2042 RISC-V CPU
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Cascade: CPU Fuzzing via Intricate Program Generation
Looks like from Appendix D that only 2 bugs were found in BOOM:
> 1. Inaccurate instruction count when minstret is written by software
I don't know what that means, but having minstret written by software was definitely not something I ever tested. In general, perf counters are likely to be undertested.
> 2. Static rounding is ignored for fdiv.s and fsqrt.s
A mistake was made in only listening to the dynamic rounding mode for the fdiv/sqrt unit. This is one of those bugs that is trivially found if you test for it, but it turns out that no benchmarking ever cared about this and from all of the fuzzers I used when I worked on BOOM, NONE of them hit it (including commercial ones...). Ooops.
Fixed here: https://github.com/riscv-boom/riscv-boom/pull/629/files
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In your opinion, what is the most advanced open source softcore processor?
The two most micro architecturally advanced cores that I know of are BOOM, an out of order RV64GC core with all the features you expect plus sort of weird fancy things like short forward branch predication, and VROOM, another out of order RV64GC core with things like uop fusion and a trace cache.
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PyXHDL - Python Frontend For VHDL And Verilog
it is used in the Berkley Out-of-Order RISC-V processor: https://github.com/riscv-boom/riscv-boom
- TechTechPotato (Dr Ian Cutress): "Building High-Performance RISC-V Cores for Everything"
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Open-source RISC-V CPU projects for contribution
SonicBOOM: https://github.com/riscv-boom/riscv-boom
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The Surprising Subtleties of Zeroing a Register
Some cores are open source and you can see for yourself.
Rename logic from BOOM, a RISC-V core written in a DSL embedded in Scala:
https://github.com/riscv-boom/riscv-boom/blob/1ef2bc6f6c98e5...
From RSD, a core designed for FPGAs written in SystemVerilog:
https://github.com/rsd-devel/rsd/blob/master/Processor/Src/R...
And then there's the recently open-sourced XuanTie C910, which contains this Verilog… which is completely unreadable. Seems like it was produced by some kind of code generator that they didn't open-source?
https://github.com/T-head-Semi/openc910/blob/d4a3b947ec9bb8f...
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Anandtech: "IBM Power10 Coming To Market: E1080 for 'Frictionless Hybrid Cloud Experiences'"
We don't have Sifive's specifically but we do have the open source cores they've historically used to design their cores: https://github.com/riscv-boom/riscv-boom https://github.com/chipsalliance/rocket-chip
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RSD is a open source high performance RISC-V Processor
The SonicBOOM from Berkeley is on paper superior as it supports the 64-bit ISA.
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A note from our sponsor - SaaSHub
www.saashub.com | 28 Mar 2024
Stats
riscv-boom/riscv-boom is an open source project licensed under BSD 3-clause "New" or "Revised" License which is an OSI approved license.
The primary programming language of riscv-boom is Scala.