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32 Commits

Author SHA1 Message Date
Marcelina Kościelnicka cf60699884 synth_ice40: Use opt_dff. 
The main part is converting ice40_dsp to recognize the new FF types
created in opt_dff instead of trying to recognize the mux patterns on
its own.

The fsm call has been moved upwards because the passes cannot deal with
$dffe/$sdff*, and other optimizations don't help it much anyway.
 2020-07-30 22:26:20 +02:00
whitequark 7191dd16f9 Use C++11 final/override keywords. 2020-06-18 23:34:52 +00:00
Eddie Hung 956ecd48f7 kernel: big fat patch to use more ID::*, otherwise ID(*) 2020-04-02 09:51:32 -07:00
Eddie Hung fdafb74eb7 kernel: use more ID::* 2020-04-02 07:14:08 -07:00
Eddie Hung e18aeda7ed Fix $lut input ordering -- SigSpec(std::initializer_list<>) is backwards 
Just like Verilog...
 2020-01-27 14:02:13 -08:00
Eddie Hung cfb0366a18 Import tests from #1628 2020-01-27 13:56:16 -08:00
Eddie Hung b178761551 ice40: reduce ABC9 internal fanout warnings with a param for CI->I3 2020-01-24 11:59:48 -08:00
Miodrag Milanovic c5d28f5d6b Valid to have attribute starting with SB_CARRY. 2020-01-04 19:00:44 +01:00
Eddie Hung fb203d2a2c ice40_opt to restore attributes/name when unwrapping 2019-12-09 14:29:29 -08:00
Eddie Hung 1ea9ce0ad7 ice40_opt to ignore (* keep *) -ed cells 2019-12-03 14:48:39 -08:00
Eddie Hung a4f641f230 Do not overwrite LUT param 2019-08-28 18:46:53 -07:00
Eddie Hung f5b4bc847c Adapt to $__ICE40_CARRY_WRAPPER 2019-08-28 17:25:05 -07:00
Eddie Hung e569f13870 Revert "Remove $__ICE40_FULL_ADDER handling from ice40_opt; cannot reason with" 
This reverts commit 2aedee1f0e.
 2019-08-28 17:22:44 -07:00
Eddie Hung 2aedee1f0e Remove $__ICE40_FULL_ADDER handling from ice40_opt; cannot reason with 
CARRY_WRAPPER in the same way since I0 and I3 could be used
 2019-08-28 17:07:36 -07:00
Eddie Hung 7164996921 RTLIL::S{0,1} -> State::S{0,1} 2019-08-07 11:12:38 -07:00
Eddie Hung 5fb27c071b $__ICE40_CARRY_LUT4 -> $__ICE40_FULL_ADDER as per @whitequark 2019-07-15 12:03:51 -07:00
Eddie Hung d032198fac ice40_opt to $__ICE40_CARRY_LUT4 into $lut not SB_LUT 2019-07-13 01:11:00 -07:00
Eddie Hung 7a912f22b2 Use Const::from_string() not its constructor... 2019-07-12 01:32:10 -07:00
Eddie Hung 4de03bd5e6 Remove double push 2019-07-12 01:08:48 -07:00
Eddie Hung 0f5bddcd79 ice40_opt to handle this box and opt back to SB_LUT4 2019-07-12 00:52:31 -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