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| author | Sylvain Munaut <tnt@246tNt.com> | 2018-12-08 22:46:28 +0100 |
|---|---|---|
| committer | Sylvain Munaut <tnt@246tNt.com> | 2018-12-08 22:46:28 +0100 |
| commit | add6ab9b2a8d94bee0e7949a4524cc673ec336b1 (patch) | |
| tree | 0d6563091993f55976319bdabaffcf1fac40c953 /techlibs/ice40 | |
| parent | 47a5dfdaa4bd7d400c6e3d58476de80904df460d (diff) | |
| download | yosys-add6ab9b2a8d94bee0e7949a4524cc673ec336b1.tar.gz yosys-add6ab9b2a8d94bee0e7949a4524cc673ec336b1.tar.bz2 yosys-add6ab9b2a8d94bee0e7949a4524cc673ec336b1.zip | |
ice40: Honor the "dont_touch" attribute in FFSSR pass
This is useful if you want to place FF manually ... can't merge SR in those
because it might make the manual placement invalid
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Diffstat (limited to 'techlibs/ice40')
| -rw-r--r-- | techlibs/ice40/ice40_ffssr.cc | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/techlibs/ice40/ice40_ffssr.cc b/techlibs/ice40/ice40_ffssr.cc index 668df09dd..a7649d7a0 100644 --- a/techlibs/ice40/ice40_ffssr.cc +++ b/techlibs/ice40/ice40_ffssr.cc @@ -81,6 +81,9 @@ struct Ice40FfssrPass : public Pass { for (auto cell : ff_cells) { + if (cell->get_bool_attribute("\\dont_touch")) + continue; + SigSpec sig_d = cell->getPort("\\D"); if (GetSize(sig_d) < 1) |