[IRON] Add specialized FIFO subclasses (Cascade / Packet / Accum / Sparse / Memtile / VariableRate)#3039

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matteius wants to merge 21 commits into

Xilinx:mainfrom

opensensor:feature/iron-fifo-primitives

Commits on Apr 27, 2026

[IRON] Reserve subclass slots for specialized FIFO primitives
Matt Davis
committed
[IRON] CascadeFifo — first-class cascade-stream primitive (Apache-2.0 + LLVM exception)
Matt Davis
committed
[IRON] AccumFifo — FP32 inter-tile accumulator state passing (AM020 Ch. 4 p. 67)
Matt Davis
committed
[IRON] Worker.fn_args FifoHandle registry -- extensible type dispatch (foundation for PacketFifo)
Matt Davis
committed
[IRON] PacketFifo -- variable-rate packet-switched stream primitive
Matt Davis
committed
[IRON] MemtileAggregator -- memtile-mediated 4-into-1 fan-in helper (AM020 Ch. 5 p. 74)
Matt Davis
committed
[IRON] SparseFifo — on-the-fly weight decompression
Matt Davis
committed
[IRON] normalize *FifoHandle subclass contract
Matt Davis
committed
[IRON] VariableRateFifo — producer-side conditional-forward FIFO
Matt Davis
committed
[IRON] Strip project-internal task references from __init__.py
Matt Davis
committed
[AIE] plumb SparseFifo discardable attrs to BD Enable_Compression bit
Matt Davis
committed
[AIE] ObjectFifoStatefulTransform: VariableRateFifo unroll-skip + attr propagation
Matt Davis
committed
[IRON] Address review issues 4, 9, 10
Matt Davis
committed
[IRON] VariableRateFifo example: actually exercise discard(1)
Matt Davis
committed
[IRON] Address smaller review issues (registry brittleness, _RegistrySnapshot export)
Matt Davis
committed
[IRON] Document parent-constructor bypass in AccumFifoHandle / PacketFifoHandle
Matt Davis
committed
[IRON] PacketFifo: add end-to-end lowering tests against an aie.device context
Matt Davis
committed
[IRON] Address Copilot review feedback (strip-residue cleanup)
Matt Davis
committed
Update python/iron/sparse.py

matteius
and
Copilot
authored
[example] Add dispatch_overhead_bisector AIE2P diagnostic example
Matt Davis
committed
[IRON] Address Copilot round-2 review feedback
Matt Davis
committed

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[IRON] Add specialized FIFO subclasses (Cascade / Packet / Accum / Sparse / Memtile / VariableRate)#3039

[IRON] Add specialized FIFO subclasses (Cascade / Packet / Accum / Sparse / Memtile / VariableRate)#3039
matteius wants to merge 21 commits into
Xilinx:mainfrom
opensensor:feature/iron-fifo-primitives

Commits on Apr 27, 2026

[IRON] Reserve subclass slots for specialized FIFO primitives

[IRON] CascadeFifo — first-class cascade-stream primitive (Apache-2.0 + LLVM exception)

[IRON] AccumFifo — FP32 inter-tile accumulator state passing (AM020 Ch. 4 p. 67)

[IRON] Worker.fn_args FifoHandle registry -- extensible type dispatch (foundation for PacketFifo)

[IRON] PacketFifo -- variable-rate packet-switched stream primitive

[IRON] MemtileAggregator -- memtile-mediated 4-into-1 fan-in helper (AM020 Ch. 5 p. 74)

[IRON] SparseFifo — on-the-fly weight decompression

[IRON] normalize *FifoHandle subclass contract

[IRON] VariableRateFifo — producer-side conditional-forward FIFO

[IRON] Strip project-internal task references from init.py

[AIE] plumb SparseFifo discardable attrs to BD Enable_Compression bit

[AIE] ObjectFifoStatefulTransform: VariableRateFifo unroll-skip + attr propagation

[IRON] Address review issues 4, 9, 10

[IRON] VariableRateFifo example: actually exercise discard(1)

[IRON] Address smaller review issues (registry brittleness, _RegistrySnapshot export)

[IRON] Document parent-constructor bypass in AccumFifoHandle / PacketFifoHandle

[IRON] PacketFifo: add end-to-end lowering tests against an aie.device context

[IRON] Address Copilot review feedback (strip-residue cleanup)

Update python/iron/sparse.py

[example] Add dispatch_overhead_bisector AIE2P diagnostic example

[IRON] Address Copilot round-2 review feedback