yosys

Commit Graph

Author	SHA1	Message	Date
Emil J. Tywoniak	bd6f7bb4a7	ff: improve comments	2024-09-05 11:17:12 +02:00
Jannis Harder	c0063288d6	Add the $anyinit cell and the formalff pass These can be used to protect undefined flip-flop initialization values from optimizations that are not sound for formal verification and can help mapping all solver-provided values in witness traces for flows that use different backends simultaneously.	2022-08-16 13:37:30 +02:00
Marcelina Kościelnicka	2858bb03cd	Add opt_ffinv pass.	2022-05-13 23:02:30 +02:00
Marcelina Kościelnicka	0a0df8d38c	dfflegalize: Refactor, add aldff support.	2021-10-27 14:14:01 +02:00
Marcelina Kościelnicka	4e70c30775	FfData: some refactoring. - FfData now keeps track of the module and underlying cell, if any (so calling emit on FfData created from a cell will replace the existing cell) - FfData implementation is split off to its own .cc file for faster compilation - the "flip FF data sense by inserting inverters in front and after" functionality that zinit uses is moved onto FfData class and beefed up to have dffsr support, to support more use cases	2021-10-07 04:24:06 +02:00
Marcelina Kościelnicka	e7d89e653c	Hook up $aldff support in various passes.	2021-10-02 21:01:21 +02:00
Marcelina Kościelnicka	63b9df8693	kernel/ff: Refactor FfData to enable FFs with async load. - _en is split into _ce (clock enable) and *_aload (async load aka latch gate enable), so both can be present at once - has_d is removed - has_gclk is added (to have a clear marker for $ff) - d_is_const and val_d leftovers are removed - async2sync, clk2fflogic, opt_dff are updated to operate correctly on FFs with async load	2021-10-02 20:19:48 +02:00
Marcelina Kościelnicka	f9aad606ca	simplemap: refactor to use FfData.	2021-10-02 03:24:57 +02:00
Marcelina Kościelnicka	1eea06bcc0	Add new helper class for merging FFs into cells, use for memory_dff. Fixes #1854.	2021-05-23 14:46:59 +02:00
Marcelina Kościelnicka	4a05cad7f8	async2sync: Support all FF types.	2020-07-30 20:22:03 +02:00
Marcelina Kościelnicka	dafe04d559	Add utility module for representing flip-flops.	2020-07-23 23:39:46 +02:00

11 Commits