Cynlib was a C++ hardware-modeling and simulation environment that Netrake used to explore its product’s architecture before refining it in RTL. The model let the startup analyze transactions across the whole product; contemporary trade reporting says Netrake went on to working silicon with Cynlib.
What was Cynlib?
Cynlib, also styled CynLib, was software for describing and simulating hardware—not a processor chip or a consumer product. Its C++ class library provided ways to represent hardware modules, concurrent processes, event synchronization, and bit-oriented data. A simulation kernel ran compiled models as executable simulations of the described system.
Those abstractions made it possible to explore a design as a functioning system before committing to a detailed RTL implementation. Cynlib also supported Verilog co-simulation, allowing a C++ model and Verilog components to participate in simulation together.
How did Netrake use Cynlib?
Netrake, an IC startup, built a high-level model of an entire product in Cynlib. It used that model for transaction-level functional analysis: designers could examine how the architecture handled transactions and investigate design choices before refining the system in RTL.
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The distinction matters: the account describes Cynlib as an early architectural modeling and analysis environment. It does not establish that Netrake synthesized the Cynlib model itself into the finished chip. Contemporary trade reporting does say that Netrake reached working silicon with Cynlib in its design process.
Was Cynlib a replacement for Verilog?
Not in the sense of replacing RTL design or eliminating Verilog. Cynlib offered a higher-level C++ view for architectural exploration, while its Verilog co-simulation support provided a way to connect that view with Verilog models. The available accounts do not establish a universal synthesis flow from Cynlib models to hardware, so it is more accurate to describe it as a modeling and simulation approach than as a drop-in Verilog replacement.
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How did Cynlib differ from Verilog and SystemC?
| Dimension | Cynlib | Verilog | SystemC |
|---|---|---|---|
| Role described in the historical accounts | C++ modeling and simulation for architectural exploration | Could participate in co-simulation with Cynlib; the accounts do not give a broader comparison of Verilog’s role | The later standardized alternative that gained ecosystem value |
| Modeling features | Classes for modules, concurrent processes, events, and bit-oriented variables, run by a simulation kernel | Not specified in enough detail for a feature-by-feature comparison | Kevin Kranen described Cynlib as “kind of a subset of SystemC” |
| Interoperability | Verilog co-simulation was supported | Could be co-simulated with Cynlib | The available accounts do not specify interoperability details |
| Standardization and long-term ecosystem | Did not retain the strategic advantage of a standard ecosystem | Not compared on this point in the available accounts | Its standardization gave it broader ecosystem value, according to Cynlib proponent John Sanguinetti |
The historical accounts do not provide a sufficiently documented benchmark for a reliable speed comparison, nor do they establish current tool availability or a complete synthesis-path comparison.
Why did designers move from Cynlib to SystemC?
The key advantage was standardization, not a claim that Cynlib’s approach was inherently inferior. John Sanguinetti, a CynApps/Forte executive, said: “The only real change we made was in going from Cynlib to SystemC. While we felt that Cynlib was more elegant than SystemC, the value of a standard is undeniable.”
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- 2.4GHz Dual Mode WiFi + Bluetooth Development Board
- Support LWIP protocol, Freertos;ESP32 is a safe, reliable, and scalable to a variety of applications
- SupportThree Modes: AP, STA, and AP+STA
- Ultra-Low power consumption, Compatible with Arduino IDE
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A common standard can make a modeling approach more useful across organizations and tools than a mature but less widely standardized alternative. Cynlib’s proponents could therefore regard it as elegant and mature while still moving toward SystemC for the ecosystem benefits of a standard.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What happened to Cynlib?
Cynlib’s historical significance is as an early C++ hardware-modeling environment and as a predecessor to work that continued in SystemC. The historical accounts discussed here do not establish a current Cynlib release or an actively maintained commercial product. They support its role in Netrake’s design work and its loss of strategic ground as SystemC’s standard ecosystem grew, but not a definitive account of when or how every Cynlib offering ended.
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- Multifunctional Sensor: Onboard QMI8658 6-axis IMU (3-axis accelerometer and 3-axis gyroscope) for detecting motion gestures, counting steps, etc; PCF85063 RTC chip connected to the battry via the AXP2101 for uninterrupted power supply; Onboard PWR and BOOT programmable buttons for easy custom function development.
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