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* ice40: Honor the "dont_touch" attribute in FFSSR passSylvain Munaut2018-12-081-0/+3
| | | | | | | 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>
* Consistent use of 'override' for virtual methods in derived classes.Henner Zeller2018-07-201-2/+2
| | | | | | | | | o Not all derived methods were marked 'override', but it is a great feature of C++11 that we should make use of. o While at it: touched header files got a -*- c++ -*- for emacs to provide support for that language. o use YS_OVERRIDE for all override keywords (though we should probably use the plain keyword going forward now that C++11 is established)
* Minor fixes in ice40_ff* passes for sloppy SB_DFF instantiationsClifford Wolf2016-07-081-1/+6
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* Added "yosys -D" featureClifford Wolf2016-04-211-1/+1
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* Fixed trailing whitespacesClifford Wolf2015-07-021-3/+3
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* Added mapping of synchronous set/reset to iCE40 flowClifford Wolf2015-04-171-0/+123