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101 Commits

Author SHA1 Message Date
Clifford Wolf 62493c91b2 Add first draft of functional SB_MAC16 model 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-19 14:47:27 +01:00
Clifford Wolf da1c8d8d3d
Merge pull request #772 from whitequark/synth_lut 
synth: add k-LUT mode
 2019-01-02 15:44:57 +01:00
whitequark efa278e232 Fix typographical and grammatical errors and inconsistencies. 
The initial list of hits was generated with the codespell command
below, and each hit was evaluated and fixed manually while taking
context into consideration.

    DIRS="kernel/ frontends/ backends/ passes/ techlibs/"
    DIRS="${DIRS} libs/ezsat/ libs/subcircuit"
    codespell $DIRS -S *.o -L upto,iff,thru,synopsys,uint

More hits were found by looking through comments and strings manually.
 2019-01-02 13:12:17 +00:00
whitequark 17b2831356 synth_ice40: use 4-LUT coarse synthesis mode. 2019-01-02 08:25:55 +00:00
Clifford Wolf 5fa5dbbdda Rename "fine:" label to "map:" in "synth_ice40" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-12-16 16:36:19 +01:00
Clifford Wolf 2a681909df
Merge pull request #724 from whitequark/equiv_opt 
equiv_opt: new command, for verifying optimization passes
 2018-12-16 15:54:26 +01:00
Clifford Wolf ceffa66dbd
Merge pull request #730 from smunaut/ffssr_dont_touch 
ice40: Honor the "dont_touch" attribute in FFSSR pass
 2018-12-16 15:50:42 +01:00
Clifford Wolf 0c69f1d777
Merge pull request #725 from olofk/ram4k-init 
Only use non-blocking assignments of SB_RAM40_4K for yosys
 2018-12-16 15:42:04 +01:00
Sylvain Munaut add6ab9b2a 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>
 2018-12-08 22:46:28 +01:00
whitequark 7ff5a9db2d equiv_opt: pass -D EQUIV when techmapping. 
This allows avoiding techmap crashes e.g. because of large memories
in white-box cell models.
 2018-12-07 17:20:34 +00:00
Olof Kindgren 889297c62a Only use non-blocking assignments of SB_RAM40_4K for yosys 
In an initial statement, blocking assignments are normally used
and e.g. verilator throws a warning if non-blocking ones are used.

Yosys cannot however properly resolve the interdependencies if
blocking assignments are used in the initialization of SB_RAM_40_4K
and thus this has been used.

This patch will change to use non-blocking assignments only for yosys
 2018-12-06 21:45:59 +01:00
whitequark 6e559ee3c7 synth_ice40: split `map_gates` off `fine`. 2018-12-06 12:04:39 +00:00
whitequark d9fa4387c9 synth_ice40: add -noabc option, to use built-in LUT techmapping. 
This should be combined with -relut to get sensible results.
 2018-12-05 17:13:46 +00:00
whitequark 45cb6200af opt_lut: add -dlogic, to avoid disturbing logic such as carry chains. 2018-12-05 16:30:37 +00:00
whitequark ea4870b126 synth_ice40: add -relut option, to run ice40_unlut and opt_lut. 2018-12-05 16:30:37 +00:00
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
Sylvain Munaut 3e5ab50a73 ice40: Add option to only use CE if it'd be use by more than X FFs 
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2018-11-27 21:50:42 +01:00
Clifford Wolf 51f1bbeeb0 Add iCE40 SB_SPRAM256KA simulation model 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-09-10 11:57:24 +02:00
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
David Shah cd65eeb3b3 ice40: Add CIN_CONST and CIN_SET parameters to ICESTORM_LC 
Signed-off-by: David Shah <davey1576@gmail.com>
 2018-07-13 13:09:18 +02:00
Clifford Wolf 57fc8dd582 Add "synth_ice40 -json" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-06-13 13:35:10 +02:00
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
Olof Kindgren faac2c5595 Avoid mixing module port declaration styles in ice40 cells_sim.v 
The current code requires workarounds for several simulators
For modelsim, the file must be compiled with -mixedansiports and
xsim needs --relax.
 2018-05-17 13:54:43 +02:00
Tim 'mithro' Ansell d6bdefd2e9 Improving vpr output support. 
* Support output BLIF for Xilinx architectures.
 * Support using .names in BLIF for Xilinx architectures.
 * Use the same `NO_LUT` define in both `synth_ice40` and
  `synth_xilinx`.
 2018-04-18 16:55:12 -07:00
Tim 'mithro' Ansell ca39e493ba synth_ice40: Rework the vpr blif output slightly. 2018-04-18 16:55:08 -07:00
Clifford Wolf 81a457c4a6 Add "synth_ice40 -nodffe" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-04-16 20:44:26 +02:00
Larry Doolittle efaef82f75 Squelch trailing whitespace, including meta-whitespace 2018-03-11 16:03:41 +01:00
Graham Edgecombe f93e6637aa Fix port names in SB_IO_OD 2017-12-10 15:33:38 +00:00
Graham Edgecombe 52ace35a73 Remove trailing comma from SB_IO_OD port list 
This isn't compatible with Icarus Verilog.
 2017-12-10 15:33:38 +00:00
Tim Ansell 3cc31f197c
Fix spelling in -vpr help for synth_ice40 2017-12-08 18:44:45 -08:00
David Shah 5e8d1922a4 Add remaining UltraPlus cells to ice40 techlib 2017-11-28 11:07:49 +00:00
David Shah 0505f1043c Remove unnecessary keep attributes 2017-11-18 17:53:21 +00:00
David Shah 8ae73e60e2 Merge branch 'master' into up5k 2017-11-17 15:15:39 +00:00
Clifford Wolf 234726c655 Add "synth_ice40 -vpr" 2017-11-16 21:37:02 +01:00
David Shah f9f3ca5da0 Add some UltraPlus cells to ice40 techlib 2017-11-16 12:24:35 +00:00
Clifford Wolf e64b9d5a4d Fix synth_ice40 doc regarding -top default 2017-09-29 17:52:57 +02:00
Clifford Wolf 81bdf0ad0f iCE40 flow is not experimental anymore 2016-11-01 11:32:02 +01:00
Clifford Wolf 21659847a7 Minor fixes in ice40_ff* passes for sloppy SB_DFF instantiations 2016-07-08 14:41:36 +02:00
Clifford Wolf df5ebfa0a0 Improved ice40_ffinit error reporting 2016-06-30 09:58:13 +02:00
Clifford Wolf ca91bccb6b Added "deminout" 2016-06-19 13:08:16 +02:00
Clifford Wolf 6fe3d5a1cf Added synth_ice40 support for latches via logic loops 2016-05-06 23:02:37 +02:00
Clifford Wolf 126da0ad3d Fixed ice40_opt lut unmapping, added "ice40_opt -unlut" 2016-05-06 14:32:32 +02:00
Clifford Wolf a24021ea20 Converted synth_greenpak4 to ScriptPass 2016-04-23 10:27:33 +02:00
Clifford Wolf 0bc95f1e04 Added "yosys -D" feature 2016-04-21 23:28:37 +02:00
Clifford Wolf 2553319081 Added ScriptPass helper class for script-like passes 2016-03-31 11:16:34 +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 0ccfb88728 Work around DDR dout sim glitches in ice40 SB_IO sim model 2016-02-07 11:19:48 +01:00
Clifford Wolf d69395ca08 Added dffsr2dff 2016-02-02 17:19:01 +01:00
Clifford Wolf 2ee608246f Re-run ice40_opt in "synth_ice40 -abc2" 2015-12-22 12:19:11 +01:00