RISC-V Design · All levels

Instruction Encoding and Format Families: Inputs and Outputs

Inputs and Outputs for Instruction Encoding and Format Families.

Inputs and outputs contract

Inputs and Outputs for Instruction Encoding and Format Families is anchored on Decode critical-path depth, immediate-generation logic complexity, and illegal-instruction detection coverage.. Convert observations into mechanism-backed decisions with explicit ownership.

diagram

INPUTS
  - workload definition and target KPI
  - architecture profile and enabled extensions
  - compiler/runtime/firmware metadata
  - correctness and security gates

OUTPUTS
  - evidence-backed bottleneck class
  - owner-signed mitigation plan
  - validation matrix with rollback thresholds

Ownership split

diagram

RISC-V OWNERSHIP LAYERS - Instruction Encoding and Format Families

layer                  owner                         closure artifact
--------------------   ----------------------------  -----------------------------
ISA compliance         architecture/spec team        unpriv + priv test evidence
decode/control         front-end RTL owner           decode matrix + assertions
pipeline timing        microarchitecture owner       hazard/perf regression trends
memory + MMU           LSU/MMU owner                 TLB/pagewalk trace checks
privilege/CSR path     firmware + kernel interface   trap/interrupt conformance
vector subsystem       vector RTL + compiler owner   lane-utilization profiles

Practice this lesson