13 Commits

Author	SHA1	Message	Date
Eddie Hung	a7632ab332	Try using an ICE40_CARRY_LUT primitive to avoid ABC issues	2019-04-17 11:10:04 -07:00
whitequark	1719aa88ac	Extract ice40_unlut pass from ice40_opt. ... Currently, `ice40_opt -unlut` would map SB_LUT4 to $lut and convert them back to logic immediately. This is not desirable if the goal is to operate on $lut cells. If this is desirable, the same result as `ice40_opt -unlut` can be achieved by running simplemap and opt after ice40_unlut.	2018-12-05 16:30:24 +00:00
Henner Zeller	3aa4484a3c	Consistent use of 'override' for virtual methods in derived classes. ... 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)	2018-07-20 23:51:06 -07:00
Clifford Wolf	83631555dd	Fix ice40_opt for cases where a port is connected to a signal with width != 1 ... Signed-off-by: Clifford Wolf <clifford@clifford.at>	2018-06-11 18:12:42 +02:00
Clifford Wolf	126da0ad3d	Fixed ice40_opt lut unmapping, added "ice40_opt -unlut"	2016-05-06 14:32:32 +02:00
Clifford Wolf	0bc95f1e04	Added "yosys -D" feature	2016-04-21 23:28:37 +02:00
Clifford Wolf	ec93680bd5	Renamed opt_share to opt_merge	2016-03-31 08:52:49 +02:00
Clifford Wolf	1d0f0d668a	Renamed opt_const to opt_expr	2016-03-31 08:46:56 +02:00
Clifford Wolf	3102ffbb83	Improvements in ice40_opt	2015-12-22 12:18:38 +01:00
Clifford Wolf	6c84341f22	Fixed trailing whitespaces	2015-07-02 11:14:30 +02:00
Clifford Wolf	9d067fecea	ice40_opt bugfix	2015-04-27 11:36:13 +02:00
Clifford Wolf	310fde197e	iCE40: SB_CARRY const fold -> unmap SB_LUT	2015-04-27 10:27:50 +02:00
Clifford Wolf	8d4a675f91	Added iCE40 const folding support for SB_CARRY	2015-04-27 08:38:14 +02:00