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* intel_alm: Fix illegal carry chainsgatecat2021-05-151-1/+1
| | | | Signed-off-by: gatecat <gatecat@ds0.me>
* Add force_downto and force_upto wire attributes.Marcelina Koƛcielnicka2020-05-191-0/+7
| | | | Fixes #2058.
* synth_intel_alm: alternative synthesis for Intel FPGAsDan Ravensloft2020-04-151-0/+64
By operating at a layer of abstraction over the rather clumsy Intel primitives, we can avoid special hacks like `dffinit -highlow` in favour of simple techmapping. This also makes the primitives much easier to manipulate, and more descriptive (no more cyclonev_lcell_comb to mean anything from a LUT2 to a LUT6).