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lowRISC / ibex Public

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Add Zcb and Zcmp extension RTL#2347

Merged

SamuelRiedel merged 16 commits intolowRISC:masterlowRISC/ibex:masterfrom

SamuelRiedel:zcbzcmp-rtlSamuelRiedel/ibex:zcbzcmp-rtlCopy head branch name to clipboard

Dec 23, 2025

Conversation Commits16 (16)Checks Files changed

Merged

Add Zcb and Zcmp extension RTL#2347
SamuelRiedel merged 16 commits intolowRISC:masterfrom
SamuelRiedel:zcbzcmp-rtl

Commits

Commits on Dec 23, 2025

[rtl] Implement the Zcb extension

Elias Christen
authored and
SamuelRiedel
committed
[rtl] Implement Zcmp extension

andreaskurth
authored and
SamuelRiedel
committed
[rvfi] Output expanded instructions (except for the last one)

andreaskurth
authored and
SamuelRiedel
committed
[rtl] Parametrize Zcb and Zcmp extensions
SamuelRiedel
committed
[doc] Add Zcb and Zcmp extension to documentation
SamuelRiedel
committed
[rtl] Track last expanded instruction
SamuelRiedel
committed
[rvfi] Track expanded instruction in rvfi
SamuelRiedel
committed
[rtl] Annotate traces with expanded instruction information
SamuelRiedel
committed
[rtl] Fix handshake on compressed decoder
SamuelRiedel
committed
[rtl] Add explanations to the Zcmp state machine
SamuelRiedel
committed
[rtl] Optimize the Zcmp FSM
SamuelRiedel
committed
[rtl] Only start the push/pop FSM if the instruction is valid
SamuelRiedel
committed
[rtl] Add assertion to ensure the push/pop FSM only advances if valid
SamuelRiedel
committed
[rtl] Compute `gets_expanded_o` only if the instruction is valid
SamuelRiedel
committed
[rtl] Make Zcmp state registers resettable
SamuelRiedel
committed
[formal] Disable the Zc* extensions for formal verification
SamuelRiedel
committed

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