caiyu/nextpnr
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4 Commits

Author SHA1 Message Date
Keith Rothman
c2a6f6ce62 [interchange] Fix invalid use of local variables due to refactoring. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-04-06 10:42:05 -07:00
Keith Rothman
77bc2f9130 Add initial handling of local site inverters and constant signals. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-25 17:20:09 -07:00
Keith Rothman
831b94cdac Initial version of inverter logic. 
For now just implements some inspection capabilities, and the site
router (for now) avoids inverted paths.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-23 09:03:07 -07:00
Keith Rothman
32f2ec86c4 Rework FPGA interchange site router. 
The new site router should be robust to most situations, and isn't
significantly slower with the use of caching.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-22 09:54:49 -07:00