Architectural Evidence

Before capital commits, architecture should earn the commitment.

Living Cipher evaluates consequential compute as a sequence of evidence-backed decisions. Software, FPGA, accelerator, component and ASIC are not roadmap stages by default. Each is a different capital commitment that must be justified by measured architectural evidence.

The principle

Silicon is an evidence outcome.

Living Cipher begins with the workload itself: what computation recurs, where conventional compute performs well, where it does not, what data must move, how state persists, what latency matters, and what deployment environment the architecture must survive.

Only after those questions are measured does specialized hardware become a candidate. CPU, GPU, NPU and DSP remain legitimate outcomes when they are sufficient.

Clinical, scientific or commercial importance does not automatically justify specialization. Computational recurrence and measurable advantage do.
Evidence chain

From computation to capital decision.

Reference workload Instrumentation CPU/GPU/NPU/DSP baseline FPGA candidate Synthesis + P&R Deployment admission Component decision ASIC candidate
1 · Characterize

Understand the recurring computation

Operation shape, invocation rate, memory behavior, temporal structure, precision, state retention and data movement are characterized before architecture is hardened.

2 · Baseline

Test programmable compute honestly

A specialized architecture must outperform a credible conventional implementation—not an intentionally weak baseline.

3 · Prototype

Build only the candidate primitive

FPGA prototypes are used to test whether the hypothesized hardware advantage survives fixed precision, physical implementation and system integration.

4 · Decide

Promote only with evidence

Timing closure, resource use, power, throughput, admission, trust, interoperability and economics all contribute to the promotion decision.

Architecture Decision Evidence

A durable record for every candidate.

Living Cipher maintains an evidence record for candidate hardware primitives and architecture decisions. The purpose is not merely documentation. It is to preserve the reasoning linking a workload to an eventual capital commitment.

Software evidenceReference implementation, CPU/GPU/NPU/DSP results, recurrence, memory behavior, temporal behavior, data movement and numerical requirements.
Hardware evidenceProposed FPGA architecture, fixed-point behavior, pipeline structure, throughput, latency, synthesis, place-and-route, Fmax, logic, memory and power.
Deployment evidenceAdmission requirements, trust interface, host/device behavior, result provenance, environmental constraints and integration burden.
Capital decisionReject, keep programmable, FPGA only, promote to reusable component, or advance as an ASIC candidate.
A rejected hardware candidate is not failed R&D. It is evidence that irreversible capital was avoided.
Modeling trade studies

The model must earn its complexity too.

Living Cipher compares modeling and state-estimation approaches against the same workload rather than treating one algorithmic family as predetermined. Linear and robust Kalman approaches, nonlinear filters, particle and ensemble methods, switching models and learned state-space architectures can all be evaluated when the problem warrants them.

Accuracy

Does greater modeling complexity materially improve the result?

Robustness

How does the model behave under missing inputs, artifacts, drift, nonlinearity and outliers?

Compute cost

What latency, memory, arithmetic and data movement does the model require?

Hardware structural fit

Does the chosen model expose regular, reusable computation that specialized hardware could exploit?

Model selection and hardware selection are separate decisions. The best model may still belong entirely in software.

The capital gate

Architecture before irreversible expenditure.

By the time a function reaches an ASIC decision, the evidence should connect workload behavior, conventional-compute limits, FPGA implementation, physical design, trust, admission and deployment economics.

The question is not whether hardware can be built. The question is whether the architecture has earned the cost of building it.