RISC-V Design · All levels
Bitmanip and Crypto Extensions: Silicon PPA Impact
Silicon PPA Impact for Bitmanip and Crypto Extensions.
Silicon PPA impact
Silicon PPA Impact for Bitmanip and Crypto Extensions is anchored on Latency and throughput for SHA/AES/SM primitives versus scalar baselines, with constant-time behavior validation.. Convert observations into mechanism-backed decisions with explicit ownership.
Frequency gains that increase bubbles may lose net throughput.
Area growth from extension logic must justify workload value.
Power and thermal stability are release gates, not secondary metrics.
PPA trend view
diagram
BEFORE / AFTER TREND - Bitmanip and Crypto Extensions
Latency and throughput for SHA/AES/SM primitives versus scalar baselines, with constant-time behavior validation.
^
| o target band
| o after fix + reruns
| o
| o baseline (failing)
+--------------------------------------------------> iteration
capture issue isolate mechanism close + monitor
Use this view to confirm the gain is causal and stable across seeds.