Gowin. FFs placement. #1386
Merged
Gowin. FFs placement. #1386
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
* Allow clusters to be created from FFs and LUTs; * Immediately create pass-through LUTs from free LUTs adjacent to FF - at the same time ensure alternating use of LUT inputs; * In case of constant networks, such pass-through LUTs are disconnected from networks altogether; * Allow FF to be placed directly into SSRAM slides - this is useful when using synchronous reading. Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
gatecat
reviewed
Oct 22, 2024
gatecat
reviewed
Oct 22, 2024
himbaechel/uarch/gowin/gowin.cc
Outdated
| if (ctx->debug) { | ||
| log("make a pass-through.\n"); | ||
| } | ||
| IdString lut_input = lut_tmpl.at(cur_lut_tmpl).first; |
There was a problem hiding this comment.
is there a reason for changing which LUT input is used each time? this seems like something that long term might be better dealt with using LUT permutation
There was a problem hiding this comment.
There is no particular reason. I can use the I3 input to all LUTS if you think it is so convenient for the one who will implement Permutation in the future.
There was a problem hiding this comment.
It would make the code a bit simpler, if there are no other downsides I would just stick to I3 particularly if permutation is planned for the future
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Allow clusters to be created from FFs and LUTs;
Immediately create pass-through LUTs from free LUTs adjacent to FF - at the same time ensure alternating use of LUT inputs;
In case of constant networks, such pass-through LUTs are disconnected from networks altogether;
Allow FF to be placed directly into SSRAM slides - this is useful when using synchronous reading.