yosys

Commit Graph

Author	SHA1	Message	Date
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	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	18ad56ef41	Add dffunmap pass. To be used with backends that cannot deal with fancy FF types (like blif or smt).	2020-07-31 00:59:51 +02:00

Author

SHA1

Message

Date

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

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

18ad56ef41

Add dffunmap pass.

To be used with backends that cannot deal with fancy FF types (like blif
or smt).

2020-07-31 00:59:51 +02:00

3 Commits