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* Missing abc_flop_q attribute on SPRAMEddie Hung2019-04-171-1/+1
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* Mark seq output ports with "abc_flop_q" attrEddie Hung2019-04-171-24/+24
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* Revert "Try using an ICE40_CARRY_LUT primitive to avoid ABC issues"Eddie Hung2019-04-171-22/+0
| | | | This reverts commit a7632ab3326c5247b8152a53808413b259c13253.
* Try using an ICE40_CARRY_LUT primitive to avoid ABC issuesEddie Hung2019-04-171-0/+22
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* Add ice40 box filesEddie Hung2019-04-161-0/+1
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* Remove ice40/cells_sim.v hack to avoid warning for blocking memory writesClifford Wolf2019-03-121-19/+0
| | | | Signed-off-by: Clifford Wolf <clifford@clifford.at>
* ice40: Add ice40_braminit pass to allow initialization of BRAM from fileSylvain Munaut2019-03-081-37/+51
| | | | | | | | 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>
* Improve iCE40 SB_MAC16 modelClifford Wolf2019-02-201-17/+10
| | | | Signed-off-by: Clifford Wolf <clifford@clifford.at>
* Add first draft of functional SB_MAC16 modelClifford Wolf2019-02-191-53/+175
| | | | Signed-off-by: Clifford Wolf <clifford@clifford.at>
* Merge pull request #724 from whitequark/equiv_optClifford Wolf2018-12-161-0/+2
|\ | | | | equiv_opt: new command, for verifying optimization passes
| * equiv_opt: pass -D EQUIV when techmapping.whitequark2018-12-071-0/+2
| | | | | | | | | | This allows avoiding techmap crashes e.g. because of large memories in white-box cell models.
* | Only use non-blocking assignments of SB_RAM40_4K for yosysOlof Kindgren2018-12-061-0/+19
|/ | | | | | | | | | | 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
* Add iCE40 SB_SPRAM256KA simulation modelClifford Wolf2018-09-101-9/+30
| | | | Signed-off-by: Clifford Wolf <clifford@clifford.at>
* ice40: Add CIN_CONST and CIN_SET parameters to ICESTORM_LCDavid Shah2018-07-131-2/+6
| | | | Signed-off-by: David Shah <davey1576@gmail.com>
* Avoid mixing module port declaration styles in ice40 cells_sim.vOlof Kindgren2018-05-171-43/+23
| | | | | | The current code requires workarounds for several simulators For modelsim, the file must be compiled with -mixedansiports and xsim needs --relax.
* Squelch trailing whitespace, including meta-whitespaceLarry Doolittle2018-03-111-3/+3
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* Fix port names in SB_IO_ODGraham Edgecombe2017-12-101-18/+18
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* Remove trailing comma from SB_IO_OD port listGraham Edgecombe2017-12-101-1/+1
| | | | This isn't compatible with Icarus Verilog.
* Add remaining UltraPlus cells to ice40 techlibDavid Shah2017-11-281-0/+263
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* Remove unnecessary keep attributesDavid Shah2017-11-181-5/+5
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* Add some UltraPlus cells to ice40 techlibDavid Shah2017-11-161-0/+103
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* Work around DDR dout sim glitches in ice40 SB_IO sim modelClifford Wolf2016-02-071-1/+7
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* Merge pull request #108 from cseed/masterClifford Wolf2015-12-071-1/+3
|\ | | | | Added LO to ICESTORM_LC for LUT cascade route.
| * Added LO to ICESTORM_LC for LUT cascade route.Cotton Seed2015-12-061-1/+3
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* | Fixed iCE40 SB_IO OUTPUT_ENABLE vs. outena_q handlingClifford Wolf2015-11-061-2/+2
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* | Fixed ice40 handling of negclk RAM40Clifford Wolf2015-09-101-8/+8
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* Improved handling of "keep" attributes in hierarchical designs in opt_cleanClifford Wolf2015-08-121-2/+1
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* Added iCE40 WARMBOOT cellMarcus Comstedt2015-08-061-0/+10
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* Don't write a 17th memory bit in ice40/cells_sim (by Larry Doolittle)Clifford Wolf2015-07-271-1/+0
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* iCE40 DFF sim models: init Q regs to 0Clifford Wolf2015-07-201-20/+43
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* Avoid tristate warning for blackbox ice40/cells_sim.vClifford Wolf2015-07-181-0/+2
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* Fixed trailing whitespacesClifford Wolf2015-07-021-2/+2
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* Added iCE40 PLL cellsClifford Wolf2015-05-311-0/+168
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* improved ice40 SB_IO sim modelClifford Wolf2015-05-231-16/+9
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* Added ice40 SB_IO sim modelClifford Wolf2015-05-231-1/+46
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* improved iCE40 SB_RAM40_4K simulation modelClifford Wolf2015-04-251-59/+83
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* More iCE40 bram improvementsClifford Wolf2015-04-251-41/+61
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* iCE40 bram tests and fixesClifford Wolf2015-04-241-8/+31
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* iCE40: Added SB_RAM40_4K{,NR,NW,NRNW}* modelsClifford Wolf2015-04-191-13/+289
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* Changed ice40 ICESTORM_CARRYCONST port nameClifford Wolf2015-04-161-2/+2
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* improved ice40 dff cell mappingClifford Wolf2015-04-161-4/+4
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* more cells in ice40 cell libraryClifford Wolf2015-04-141-8/+289
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* Added very first version of "synth_ice40"Clifford Wolf2015-03-051-0/+12