google/CFU-Playground

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Want a faster ML processor? Do it yourself! -- A framework for playing with custom opcodes to accelerate TensorFlow Lite for Microcontrollers (TFLM). . . . . . Online tutorial: https://google.github.io/CFU-Playground/ For reference docs, see the link below.

Stars: 565
Forks: 160
Open beginner issues: 0
Indexed issues: 125

Dominant language: Verilog
License: Apache-2.0
Last GitHub push: Feb 26, 2026
Latest indexed: Sep 16, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue
PR merge metrics: No merged PRs in 30d

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125 open issues indexed

RISCV toolchain issues (was: Running harness as per README.md fails) Open

google/CFU-Playground#1 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Check CORRECTNESS in harness runs. Open

google/CFU-Playground#2 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Feature request: documentation directory Open

google/CFU-Playground#3 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Renode is not installed automatically, and no instructions Open

google/CFU-Playground#4 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Move the LiteX SoC build output into the project directory Open

google/CFU-Playground#5 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Enhancement: Add Vexriscv cache miss counters, stall counters Open

google/CFU-Playground#7 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Build with SymbiFlow Open

google/CFU-Playground#9 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Enhancement: support RISCV:Renode / CFU:Verilator co-simulation Open

google/CFU-Playground#11 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
scripts/setup: If the user answers "n" to installing new packages, the script tries to install them anyway. Open

google/CFU-Playground#19 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add some linting / sanity checks / physical design summary output Open

google/CFU-Playground#24 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
RTD docs need disclaimer Open

google/CFU-Playground#45 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Clean up timing checks; support the different tools correctly, or at least make the messaging honest. Open

google/CFU-Playground#58 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Enable any LiteX-supported board to be used. Open

google/CFU-Playground#85 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add Dependabot Open

google/CFU-Playground#97 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add PLATFORM=sim (Verilator) build & run to CI Open

google/CFU-Playground#108 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Disconnected reset in proj/mnv2_first/ CFU Open

google/CFU-Playground#110 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Versioning TfLiteMicro Open

google/CFU-Playground#112 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
try to using CFU under Linux OS Open

google/CFU-Playground#122 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Switch to newlib Open

google/CFU-Playground#142 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Tensorflow model evaluation hangs when CFU support is turned off Open

google/CFU-Playground#144 · 5 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
avg_pdti8 does not work Open

google/CFU-Playground#174 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Upgrade to use GCC 10.x toolchain Open

google/CFU-Playground#182 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Create a non-ML template project Open

enhancement good first issue

google/CFU-Playground#209 · 0 comments · 4 reactions · 0 assignees · Indexed Sep 16, 2026
Use tuttest wherever possible Open

google/CFU-Playground#212 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Missing Documentation for adding custom models. Open

google/CFU-Playground#221 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Can't bump tflite-micro: new "PIL" (Pillow) Python dependency Open

google/CFU-Playground#230 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Fomu build: model with attribute can be overwritten by XXD-generated model Open

google/CFU-Playground#232 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Integrate with tflite-micro's create_tflm_tree.py script Open

google/CFU-Playground#233 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add nMigen unit tests to CI Open

google/CFU-Playground#241 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
hps_accel sometimes fails to build with Oxide Open

google/CFU-Playground#246 · 28 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Document method for getting 'sbt' both inside and outside of Google Open

google/CFU-Playground#248 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Oxide build times generally slow and vary widely Open

google/CFU-Playground#249 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Vivado timing check is not done for Arty Open

google/CFU-Playground#254 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
readme does not explain the term "CFU" Open

google/CFU-Playground#261 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add option to use PicoRV32 as the CPU Open

project

google/CFU-Playground#268 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Clean up projects and menu items; make sure everything remaining is tested in CI Open

google/CFU-Playground#270 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Reset hps_accel CFU Open

google/CFU-Playground#277 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Rewrite scripts/parallel-nextpnr-nexus in Python Open

google/CFU-Playground#281 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
hps_accel on PLATFORM=hps fMax is low Open

google/CFU-Playground#286 · 22 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
make run-renode fails with verilator error Open

google/CFU-Playground#295 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Upstream third_party/python/pythondata_cpu_vexriscv Open

google/CFU-Playground#309 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Oxide: Conda-provided toolchain performance consistently different than fresh-built Open

google/CFU-Playground#311 · 13 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Performance of Renode/Verilator cosim Open

google/CFU-Playground#313 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Failures on CI Open

google/CFU-Playground#322 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Placement of functions in application binary significantly affects performance Open

google/CFU-Playground#324 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
hps_accel: Modify accelerator to always reply next cycle Open

google/CFU-Playground#327 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Are we seeing the full benefits of LTO (link-time optimization) in CFU Playground? Open

google/CFU-Playground#330 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
High-fanout nets in HPS design Open

google/CFU-Playground#331 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Packaging discussion Open

enhancement

google/CFU-Playground#333 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
scripts/setup: answering 'n' installed packages anyway Open

google/CFU-Playground#354 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026

google/CFU-Playground

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