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Code Activity
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362 commits

Author SHA1 Message Date
Sylvain Munaut
e71055cfe8 ice40: Add ice40_braminit pass to allow initialization of BRAM from file 
This adds a INIT_FILE attribute to the SB_RAM40_4K blocks that will
initialize content from a hex file. Same behavior is imlemented in the
simulation model and in a new pass for actual synthesis

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2019-03-08 00:15:46 +01:00
Elms
cd2902ab1f ice40: use 2 bits for READ/WRITE MODE for SB_RAM map 
EBLIF output .param will only use necessary 2 bits

Signed-off-by: Elms <elms@freshred.net>
 2019-02-28 16:23:40 -08:00
Eddie Hung
f7c7003a19 Merge remote-tracking branch 'origin/master' into xaig 2019-02-26 13:16:03 -08:00
Clifford Wolf
344afdcd5f
Merge pull request #740 from daveshah1/improve_dress 
Improve ABC netname preservation
 2019-02-22 01:16:34 +01:00
Eddie Hung
a8803a1519 Merge remote-tracking branch 'origin/master' into xaig 2019-02-21 11:23:00 -08:00
Clifford Wolf
2fe1c830eb Bugfix in ice40_dsp 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-21 13:28:46 +01:00
Clifford Wolf
84999a7e68 Add ice40 test_dsp_map test case generator 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-20 17:18:59 +01:00
Clifford Wolf
218e9051bb Add "synth_ice40 -dsp" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-20 16:42:27 +01:00
Clifford Wolf
7bf4e4a185 Improve iCE40 SB_MAC16 model 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-20 12:55:20 +01:00
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
Eddie Hung
323dd0e608 synth_ice40 to have new -abc9 arg 2019-02-14 13:19:27 -08:00
David Shah
7ef2333497 ice40: Use abc -dress in synth_ice40 
Signed-off-by: David Shah <davey1576@gmail.com>
 2019-02-06 22:23:13 +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