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1646 Commits

Author SHA1 Message Date
David Shah 2bf3ca6443 memory_bram: Fix multiport make_transp 
Signed-off-by: David Shah <dave@ds0.me>
 2019-04-07 16:56:31 +01:00
Eddie Hung 1d526b7f06 Call shregmap twice -- once for variable, another for fixed 2019-04-05 17:35:49 -07:00
Eddie Hung 4afcad70e2 Merge branch 'eddie/fix_retime' into xc7srl 2019-04-05 16:30:17 -07:00
Eddie Hung d559023007 Fix S0 -> S1 2019-04-05 16:28:14 -07:00
Eddie Hung 0364a5d811 Merge branch 'eddie/fix_retime' into xc7srl 2019-04-05 15:46:18 -07:00
Eddie Hung 3c253818ca "&nf -D 0" fails => use "-D 1" instead 2019-04-05 15:30:19 -07:00
Eddie Hung 19271bd996 abc -dff now implies "-D 0" otherwise retiming doesn't happen 2019-04-05 14:42:25 -07:00
Clifford Wolf 75ca06526a Added missing argument checking to "mutate" command 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-04 18:10:10 +02:00
Eddie Hung 572603409c Merge branch 'map_cells_before_map_luts' into xc7srl 2019-04-04 07:54:42 -07:00
Benedikt Tutzer cae657cebd Used PyImport_ImportModule instead of PyImport_Import to avoid the explicit conversion to a python string 2019-04-04 10:35:01 +02:00
Benedikt Tutzer e64b3f1074 Changed filesystem dependency to boost instead of experimental std library 2019-04-04 09:24:50 +02:00
Eddie Hung aa693d5723 Remove handling for $pmux, since #895 2019-04-03 08:35:32 -07:00
Sylvain Munaut 39380c45ba proc_mux: Fix crash when trying to optimize non-existant mux to shiftx 
last_mux_cell can be NULL ...

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2019-04-03 14:50:12 +02:00
Benedikt Tutzer fd7fb1377d Added cross-platform support for plugin-paths 2019-04-03 13:21:40 +02:00
Eddie Hung d8465590ac Merge remote-tracking branch 'origin/master' into xc7srl 2019-04-03 03:36:11 -07:00
Benedikt Tutzer bbfb43006d Improved Error reporting when Python passes are loaded 2019-04-03 12:21:56 +02:00
David Shah 6acbc016f4 memory_bram: Consider read enable for address expansion register 
Signed-off-by: David Shah <dave@ds0.me>
 2019-04-02 19:47:50 +01:00
Eddie Hung aaa2690a56
Merge pull request #895 from YosysHQ/pmux2shiftx 
RFC: Add a pmux-to-shiftx optimisation to proc_mux
 2019-04-02 00:16:14 -07:00
Benedikt Tutzer 03d1606b42 Merge remote-tracking branch 'origin/master' into feature/python_bindings 2019-03-28 12:16:39 +01:00
Clifford Wolf 32bd0f22ec
Merge pull request #901 from trcwm/libertyfixes 
Libertyfixes: accept superfluous ; at end of group.
 2019-03-28 09:32:05 +01:00
Clifford Wolf 662429cc49
Merge pull request #903 from YosysHQ/bram_reset_transp 
memory_bram: Reset make_transp when growing read ports
 2019-03-28 09:30:48 +01:00
David Shah 60594ad40c memory_bram: Reset make_transp when growing read ports 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-27 17:19:14 +00:00
Niels Moseley 263ab60b43 Liberty file parser now accepts superfluous ; 2019-03-27 15:17:58 +01:00
Niels Moseley 487cb45b87 Liberty file parser now accepts superfluous ; 2019-03-27 15:15:53 +01:00
Clifford Wolf 2c7fe42ad1 Add "rename -output" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-27 13:47:42 +01:00
Clifford Wolf d351b7cb99 Improve "rename" help message 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-27 13:33:26 +01:00
Clifford Wolf 38b3fbd3f0 Add "cutpoint -undef" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-26 16:01:14 +01:00
Clifford Wolf d0b9b1bece Add "hdlname" attribute 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-26 14:52:48 +01:00
Eddie Hung 6b90d3cf6c Merge remote-tracking branch 'origin/master' into xc7srl 2019-03-25 13:17:22 -07:00
Clifford Wolf ddc1a4488e Add "cutpoint" pass 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-25 19:49:00 +01:00
Eddie Hung b7a3d35c6b Create one $shiftx per bit in width 2019-03-25 11:16:56 -07:00
Clifford Wolf 9ec50ca7b9
Merge pull request #896 from YosysHQ/transp_fixes 
memory_bram: Fix multiclock make_transp
 2019-03-25 14:55:16 +01:00
Niels Moseley 1f7f54e68e spaces -> tabs 2019-03-25 14:12:04 +01:00
Niels Moseley 9d9cc8a314 EOL is now accepted as ';' replacement on lines that look like: feature_xyz(option) 2019-03-25 12:15:10 +01:00
Niels Moseley 3b3b77291a Updated the liberty parser to accept [A:B] ranges (AST has not been updated). Liberty parser now also accepts key : value pair lines that do not end in ';'. 2019-03-24 22:54:18 +01:00
David Shah ac6cc88db3 memory_bram: Fix multiclock make_transp 
Signed-off-by: David Shah <dave@ds0.me>
 2019-03-24 16:21:36 +00:00
Eddie Hung 2507d01b03 Add a pmux-to-shiftx optimisation to proc_mux 2019-03-23 16:45:36 -07:00
Eddie Hung bf83c074c8 Cope with SHREG not having E port; Revert $pmux fine tune 2019-03-23 16:09:38 -07:00
Clifford Wolf ccfa2fe01c Add "mutate -none -mode", "mutate -mode none" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-23 20:20:32 +01:00
Clifford Wolf 59c44bb61a Add "mutate -s <filename>" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-23 17:53:09 +01:00
Eddie Hung 098bd5758f Add support for SHREGMAP+$mux, also fine tune $pmux 2019-03-22 23:22:19 -07:00
Eddie Hung 0895093c7c Leftover printf 2019-03-22 19:14:04 -07:00
Eddie Hung 456295eb66 Fixes for multibit 2019-03-22 18:32:42 -07:00
Eddie Hung 03d108cd1f Working for 1 bit 2019-03-22 17:46:49 -07:00
Eddie Hung 46753cf89f Merge remote-tracking branch 'origin/master' into xc7srl 2019-03-22 13:10:42 -07:00
Clifford Wolf 7cfd83c341 Trim init attributes when resizing FFs in "wreduce", fixes #887 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-22 11:42:19 +01:00
Eddie Hung 5597270b9e Opt 2019-03-21 10:20:27 -07:00
Eddie Hung 2b911e270b Fix spacing 2019-03-20 12:28:39 -07:00
Eddie Hung 505e4c2d59 Revert $__SHREG_ to orig; use $__XILINX_SHREG for variable length 2019-03-19 21:58:05 -07:00
Eddie Hung 5445cd4d00 Add support for variable length Xilinx SRL > 128 2019-03-19 17:44:33 -07:00
Eddie Hung 4cd8f02973 shregmap -tech xilinx to delete $shiftx for var length SRL 2019-03-19 15:05:08 -07:00
Eddie Hung 24553326dd Merge remote-tracking branch 'origin/master' into xc7srl 2019-03-19 13:11:30 -07:00
Eddie Hung 0ea7eba5f1 Make output port a non chain user 2019-03-19 13:08:43 -07:00
Eddie Hung ed32119d13 Fix shregmap to correctly recognise non chain users; cleanup 2019-03-18 16:12:19 -07:00
Eddie Hung b94db54664 shiftx NULL pointer check 2019-03-18 13:35:54 -07:00
Eddie Hung d6d9ef0fee Cleanup 2019-03-16 12:49:46 -07:00
Eddie Hung fadeadb8c8 Only accept <128 for variable length, only if $shiftx exclusive 2019-03-16 08:51:13 -07:00
Eddie Hung 06f8f2654a Working 2019-03-15 19:13:40 -07:00
Clifford Wolf aa65d3fe65 Improve mix of src/wire/wirebit coverage in "mutate -list" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-16 00:55:46 +01:00
Clifford Wolf dacaebae35 Add "fmcombine -fwd -bwd -nop" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-15 21:45:37 +01:00
Clifford Wolf 370db33a4c Add fmcombine pass 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-15 20:46:17 +01:00
Clifford Wolf d1985f6a22 Improvements in "mutate" list-reduce algorithm 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-15 00:18:31 +01:00
Clifford Wolf 27a5d9c91e Add "mutate -cfg", improve pick_cover behavior 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-14 23:20:41 +01:00
Clifford Wolf 4d304e3da7 Add a strictly coverage-driven mutation selection strategy 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-14 23:01:55 +01:00
Clifford Wolf 2a4263a75d Improve "mutate" wire coverage metric 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-14 23:01:01 +01:00
Clifford Wolf 1b4fdbb0d8 Add more mutation types, improve mutation src cover 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-14 22:04:42 +01:00
Clifford Wolf 6ad5d036c5 Add "mutate" command DB reduce functionality 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-14 22:04:42 +01:00
Clifford Wolf 8e6b69d7bb Add "mutate -mode inv", various other mutate improvements 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-14 22:04:42 +01:00
Clifford Wolf ea8ee24140 Add basic "mutate -list N" framework 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-14 22:04:42 +01:00
Clifford Wolf f806b95ed6 Improve handling of and-with-1 and or-with-0 in opt_expr, fixes #327 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-14 20:52:00 +01:00
Eddie Hung 8af9979aab Revert "Add shregmap -init_msb_first and use in synth_xilinx" 
This reverts commit 26ecbc1aee.
 2019-03-14 09:01:48 -07:00
Eddie Hung f1a8e8a480 Merge remote-tracking branch 'origin/master' into xc7srl 2019-03-14 08:59:19 -07:00
Eddie Hung 26ecbc1aee Add shregmap -init_msb_first and use in synth_xilinx 2019-03-14 08:10:02 -07:00
Clifford Wolf 399ab16315 Add $dffsr support to async2sync 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-09 11:52:00 -08:00
Eddie Hung d03780c3f4
Fix spelling in pmgen/README.md 2019-03-05 17:55:29 -08:00
Clifford Wolf ae9286386d Only run derive on blackbox modules when ports have dynamic size 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-03-02 12:36:46 -08:00
Larry Doolittle 57f8bb471f Try again for passes/pmgen/ice40_dsp_pm.h rule 
Tested on both in-tree and out-of-tree builds
 2019-03-01 20:20:53 -08:00
Clifford Wolf e847690bda Fix multiple issues in wreduce FF handling, fixes #835 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-28 17:24:46 -08:00
Larry Doolittle e2fc18f27b Reduce amount of trailing whitespace in code base 2019-02-28 14:58:11 -08:00
Clifford Wolf 68a6937173 Fix pmgen for in-tree builds 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-28 14:56:05 -08:00
Clifford Wolf 64d91219b4 Fix pmgen for out-of-tree build 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-28 14:00:58 -08:00
Clifford Wolf 63be3f3bab Improvements in "supercover" pass 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-27 11:45:13 -08:00
Clifford Wolf a58dbcf2ba Add "supercover" skeleton 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-27 11:37:08 -08:00
Larry Doolittle 61fc411c5d Clean up some whitepsace outliers 2019-02-26 09:39:46 -08:00
Clifford Wolf c258b99040 Minor changes ontop of 71bcc4c: Remove hierarchy warning that is redundant to -check 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-24 20:41:36 +01:00
Clifford Wolf c118f9a377
Merge pull request #812 from ucb-bar/arrayhierarchyfixes 
Define basic_cell_type() function and use it to derive the cell type …
 2019-02-24 11:39:13 -08:00
Clifford Wolf cd722f26a5 Cleanups in ARST handling in wreduce 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-24 20:34:23 +01:00
Clifford Wolf da14bc8524
Merge pull request #824 from litghost/fix_reduce_on_ff 
Fix WREDUCE on FF not fixing ARST_VALUE parameter.
 2019-02-24 11:29:14 -08:00
Jim Lawson 71bcc4c644 Address requested changes - don't require non-$ name. 
Suppress warning if name does begin with a `$`.
Fix hierachy tests so they have something to grep.
Announce hierarchy test types.
 2019-02-22 16:06:10 -08:00
Keith Rothman 25680f6a07 Fix WREDUCE on FF not fixing ARST_VALUE parameter. 
Adds test case that fails without code change.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2019-02-22 10:30:42 -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
Clifford Wolf d55790909c Hotfix for 4c82ddf 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-21 19:27:23 +01:00
Keith Rothman 4c82ddf394 Add -params mode to force undef parameters in selected cells. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2019-02-21 10:16:38 -08:00
Clifford Wolf 0e371109b0
Merge pull request #818 from YosysHQ/clifford/dffsrfix 
Fix opt_rmdff handling of $_DFFSR_???_ and $_DLATCHSR_???_, fixes #816
 2019-02-21 18:58:44 +01:00
Clifford Wolf 893194689d Fix typo in passes/pmgen/README.md 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-21 18:50:02 +01:00
Clifford Wolf 2da4c9c8f0 Fix opt_rmdff handling of $_DFFSR_???_ and $_DLATCHSR_???_, fixes #816 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-21 13:49:45 +01:00
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 218e9051bb Add "synth_ice40 -dsp" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-20 16:42:27 +01:00
Clifford Wolf 246391200e Add FF support to wreduce 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-20 16:36:42 +01:00
Clifford Wolf dca65d83a0 Detect and reject cases that do not map well to iCE40 DSPs (yet) 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-20 11:18:19 +01:00
Jim Lawson 5c4a72c43e Fix normal (non-array) hierarchy -auto-top. 
Add simple test.
 2019-02-19 14:35:15 -08:00
Clifford Wolf 5a853ed46c Add actual DSP inference to ice40_dsp pass 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-17 15:35:48 +01:00
Clifford Wolf c06c062469 Merge branch 'master' of github.com:YosysHQ/yosys into pmgen 2019-02-17 12:10:19 +01:00
Jim Lawson 5c504c5ae6 Define basic_cell_type() function and use it to derive the cell type for array references (instead of duplicating the code). 2019-02-15 11:31:37 -08:00
David Shah a4515712cb fsm_opt: Fix runtime error for FSMs without a reset state 
Signed-off-by: David Shah <dave@ds0.me>
 2019-02-07 10:35:36 +00:00
David Shah 58c22dae31 abc: Improved recovered netnames, also preserve src on nets with dress 
Signed-off-by: David Shah <davey1576@gmail.com>
 2019-02-06 22:23:13 +01:00
David Shah 8524a479b1 abc: Preserve naming through ABC using 'dress' command 
Signed-off-by: David Shah <dave@ds0.me>
 2019-02-06 22:23:13 +01:00
whitequark 58d059ccb7 proc_clean: fix critical typo. 2019-01-23 22:08:38 +00:00
whitequark 95b6c35882 proc_clean: fix fully def check to consider compare/signal length. 
Fixes #790.
 2019-01-18 23:22:19 +00:00
Clifford Wolf 8ddec5d882 Progress in pmgen 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-01-15 11:23:25 +01:00
Clifford Wolf 5216735210 Progress in pmgen, add pmgen README 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-01-15 11:23:25 +01:00
Clifford Wolf 55ac030382 Fix pmgen "reject" statement 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-01-15 11:23:25 +01:00
Clifford Wolf d45379936b Progress in pmgen 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-01-15 11:23:25 +01:00
Clifford Wolf 1f8e76f993 Progress in pmgen 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-01-15 11:23:25 +01:00
Clifford Wolf b9545aa0e1 Progress in pmgen 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-01-15 11:23:25 +01:00
Clifford Wolf ad69c668ce Add mockup .pmg (pattern matcher generator) file 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-01-15 11:23:25 +01:00
whitequark e792bd56b7 flowmap: clean up terminology. 
* "map": group gates into LUTs;
  * "pack": replace gates with LUTs.

This is important because we have FlowMap and DF-Map, and currently
our messages are ambiguous.

Also clean up some other log messages while we're at it.
 2019-01-08 02:05:06 +00:00
whitequark 211c26a4c9 flowmap: implement depth relaxation. 2019-01-08 01:13:05 +00:00
Clifford Wolf 8a63fc51d3 Bugfix in $memrd sharing 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-01-07 10:04:47 +01:00
Clifford Wolf dbd51d7bda
Merge pull request #782 from whitequark/flowmap_dfs 
flowmap: construct a max-volume max-flow min-cut, not just any one
 2019-01-07 09:47:57 +01:00
Clifford Wolf b5f6e786ea Switch "bugpoint" from system() to run_command() 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-01-07 09:45:21 +01:00
whitequark a342d6db49 bugpoint: new pass. 
A typical use of `bugpoint` would involve a script with a pass under
test, e.g.:

    flowmap -relax -optarea 100

and would be invoked as:

    bugpoint -yosys ./yosys -script flowmap.ys -clean -cells

This replaces the current design with the minimal design that still
crashes the `flowmap.ys` script.

`bugpoint` can also be used to perform generic design minimization
using `select`, e.g. the following script:

    select i:* %x t:$_MUX_ %i -assert-max 0

would remove all parts of the design except for an unbroken path from
an input to an output port that goes through exactly one $_MUX_ cell.
(The condition is inverted.)
 2019-01-07 03:13:19 +00:00
whitequark 8b44198e23 flowmap: construct a max-volume max-flow min-cut, not just any one. 2019-01-06 19:51:37 +00:00
Scott Mansell 62c90c4e17 Rename cells based on the wires they drive. 2019-01-06 19:00:16 +13:00
whitequark 2fcc1ee72e flowmap: add -minlut option, to allow postprocessing with opt_lut. 2019-01-04 21:18:03 +00:00
whitequark 9bc5cf0844 flowmap: cleanup for clarity. NFCI. 2019-01-04 13:04:20 +00:00
whitequark fd21564deb flowmap: improve debug graph output. NFC. 2019-01-04 03:30:04 +00:00
whitequark 7850a0c28a flowmap: add link to longer version of paper. NFC. 2019-01-04 02:33:10 +00:00
Clifford Wolf d98fe8ce1f
Merge pull request #775 from whitequark/opt_flowmap 
flowmap: new techmap pass
 2019-01-03 17:03:18 +01:00
whitequark 07af772a72 flowmap: new techmap pass. 2019-01-03 14:28:19 +00:00
Clifford Wolf 0fc6e2bfcf
Merge pull request #770 from whitequark/opt_expr_cmp 
opt_expr: refactor and improve simplification of comparisons
 2019-01-02 17:34:04 +01:00
whitequark bf8db55ef3 opt_expr: improve simplification of comparisons with large constants. 
The idea behind this simplification is that a N-bit signal X being
compared with an M-bit constant where M>N and the constant has Nth
or higher bit set, it either always succeeds or always fails.

However, the existing implementation only worked with one-hot signals
for some reason. It also printed incorrect messages.

This commit adjusts the simplification to have as much power as
possible, and fixes other bugs.
 2019-01-02 15:45:28 +00:00
Clifford Wolf 979de95cf6
Merge pull request #750 from Icenowy/anlogic-ff-init 
Initialization of Anlogic DFFs
 2019-01-02 15:52:22 +01:00
Clifford Wolf 2e606b1802
Merge pull request #773 from whitequark/opt_lut_elim_fixes 
opt_lut: elimination fixes
 2019-01-02 15:45:29 +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 c55dfb8369 opt_lut: reflect changes in sigmap. 
Otherwise, some LUTs will be missed during elimination.
 2019-01-02 10:21:58 +00:00
whitequark 06143ab33f opt_lut: use a worklist, and revisit cells affected by elimination. 2019-01-02 09:36:32 +00:00
whitequark f7363ac508 opt_lut: count eliminated cells, and set opt.did_something for them. 2019-01-02 09:14:43 +00:00
whitequark 4fd458290c opt_expr: refactor simplification of unsigned X<onehot and X>=onehot. NFCI. 2019-01-02 05:11:29 +00:00
whitequark 9e9846a6ea opt_expr: refactor simplification of signed X>=0 and X<0. NFCI. 2019-01-02 03:01:25 +00:00
whitequark 8e53d2e0bf opt_expr: simplify any unsigned comparisons with all-0 and all-1. 
Before this commit, only unsigned comparisons with all-0 would be
simplified. This commit also makes the code handling such comparisons
to be more rigorous and not abort on unexpected input.
 2019-01-02 02:45:49 +00:00
whitequark 42c356c49c opt_lut: eliminate LUTs evaluating to constants or inputs. 2018-12-31 23:55:40 +00:00
Clifford Wolf 0a840dd883 Fix handling of (* keep *) wires in wreduce 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-12-31 16:37:40 +01:00
whitequark 18291c20d2 proc_clean: remove any empty cases if all cases use all-def compare. 2018-12-23 09:04:30 +00:00
whitequark b784440857 proc_clean: remove any empty cases at the end of the switch. 
Previously, only completely empty switches were removed.
 2018-12-22 09:04:46 +00:00
whitequark 0c318e7db5 memory_collect: do not truncate 'x from \INIT. 
The semantics of an RTLIL constant that has less bits than its
declared bit width is zero padding. Therefore, if the output of
memory_collect will be used for simulation, truncating 'x from
the end of \INIT will produce incorrect simulation results.
 2018-12-21 02:01:27 +00:00
David Shah 2b16d4ed3d memory_dff: Fix typo when checking init value 
Signed-off-by: David Shah <davey1576@gmail.com>
 2018-12-18 17:40:01 +00:00
Icenowy Zheng 256fb8c95c Add "dffinit -noreinit" parameter 
Sometimes the FF cell might be initialized during the map process, e.g.
some FPGA platforms (Anlogic Eagle and Lattice ECP5 for example) has
only a "SR" pin for a FF for async reset, that resets the FF to the
initial value, which means the async reset value should be set as the
initial value. In this case the DFFINIT pass shouldn't reinitialize it
to a different value, which will lead to error.

Add a "-noreinit" parameter for the safeguard. If a FF is not
technically initialized before DFFINIT pass, the default value should be
set to x.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
 2018-12-18 23:10:40 +08:00
Icenowy Zheng fec8b3c81f Add "dffinit -strinit high low" 
On some platforms the string to initialize DFF might not be "high" and
"low", e.g. with Anlogic TD it's "SET" and "RESET".

Add a "-strinit" parameter for dffinit to allow specify the strings used
for high and low.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
 2018-12-18 15:37:43 +08:00
Clifford Wolf 2641a3089b
Revert "Proof-of-concept: preserve naming through ABC using dress" 2018-12-16 21:27:31 +01:00
Clifford Wolf ddff75b60a
Merge pull request #736 from whitequark/select_assert_list 
select: print selection if a -assert-* flag causes an error
 2018-12-16 16:45:49 +01:00
whitequark f6412d7109 select: print selection if a -assert-* flag causes an error. 2018-12-16 15:44:29 +00:00
Clifford Wolf 0d9c850a07
Merge pull request #735 from daveshah1/trifixes 
deminout fixes
 2018-12-16 16:02:21 +01:00
Clifford Wolf f53e19cc71 Fix equiv_opt indenting 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-12-16 15:57:28 +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 a2154c1be0
Merge pull request #734 from grahamedgecombe/fix-shuffled-bram-initdata 
memory_bram: Fix initdata bit order after shuffling
 2018-12-16 15:53:44 +01:00
Clifford Wolf a1fb5b1e4b
Merge pull request #714 from daveshah1/abc_preserve_naming 
Proof-of-concept: preserve naming through ABC using dress
 2018-12-16 15:41:30 +01:00
Clifford Wolf 19ca4e2ac3
Merge pull request #722 from whitequark/rename_src 
rename: add -src, for inferring names from source locations
 2018-12-16 15:28:29 +01:00
Clifford Wolf 556341a77f
Merge pull request #720 from whitequark/master 
lut2mux: handle 1-bit INIT constant in $lut cells
 2018-12-16 15:27:23 +01:00
David Shah 4c59447168 deminout: Consider $tribuf cells 
Signed-off-by: David Shah <dave@ds0.me>
 2018-12-12 17:17:40 +00:00
David Shah d3fe9465f3 deminout: Don't demote constant-driven inouts to inputs 
Signed-off-by: David Shah <dave@ds0.me>
 2018-12-12 16:50:46 +00:00
Graham Edgecombe 4fef9689ab memory_bram: Fix initdata bit order after shuffling 
In some cases the memory_bram pass shuffles the order of the bits in a
memory's RD_DATA port. Although the order of the bits in the WR_DATA and
WR_EN ports is changed to match the RD_DATA port, the order of the bits
in the initialization data is not.

This causes reads of initialized memories to return invalid data (until
the initialization data is overwritten).

This commit fixes the bug by shuffling the initdata bits in exactly the
same order as the RD_DATA/WR_DATA/WR_EN bits.
 2018-12-11 21:02:49 +00:00
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
whitequark c38ea9ae65 equiv_opt: new command, for verifying optimization passes. 2018-12-07 17:20:34 +00:00
whitequark 7ec740b7ad opt_lut: leave intact LUTs with cascade feeding module outputs. 2018-12-07 17:13:52 +00:00
whitequark 9eb03d458d opt_lut: show original truth table for both cells. 2018-12-07 17:04:41 +00:00
whitequark a8ab722824 opt_lut: add -limit option, for debugging misoptimizations. 2018-12-07 16:36:26 +00:00
David Shah 1dfb2fecab abc: Preserve naming through ABC using 'dress' command 
Signed-off-by: David Shah <dave@ds0.me>
 2018-12-06 15:05:07 +00:00
Clifford Wolf 643f858acf Bugfix in opt_expr handling of a<0 and a>=0 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-12-06 07:29:21 +01:00
whitequark a9baee4b24 rename: add -src, for inferring names from source locations. 2018-12-05 20:35:13 +00:00
whitequark d1f2cb01dc lut2mux: handle 1-bit INIT constant in $lut cells. 
This pass already handles INIT constants shorter than 2^width, but
that was not done for the recursion base case.
 2018-12-05 19:27:48 +00:00
whitequark 88217d0157 opt_lut: simplify type conversion. NFC. 2018-12-05 19:12:02 +00:00
Clifford Wolf 2d98db73e3 Rename opt_lut.cpp to opt_lut.cc 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-12-05 18:03:58 +01:00
whitequark 45cb6200af opt_lut: add -dlogic, to avoid disturbing logic such as carry chains. 2018-12-05 16:30:37 +00:00
whitequark e603484070 opt_lut: always prefer to eliminate 1-LUTs. 
These are always either buffers or inverters, and keeping the larger
LUT preserves more source-level information about the design.
 2018-12-05 16:30:37 +00:00
whitequark 59eea0183f opt_lut: collect and display statistics. 2018-12-05 16:30:37 +00:00
whitequark e54c7e951c opt_lut: refactor to use a worker. NFC. 2018-12-05 16:30:37 +00:00
whitequark 9e072ec21f opt_lut: new pass, to combine LUTs for tighter packing. 2018-12-05 16:30:37 +00:00
Clifford Wolf c800e3bb16 Fix typo 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-12-04 23:30:23 +01:00
Clifford Wolf 70c417174d
Merge pull request #702 from smunaut/min_ce_use 
Add option to only use DFFE is the resulting E signal would be use > N times
 2018-12-04 14:29:21 -08:00
Clifford Wolf 47c89d600c
Merge pull request #676 from rafaeltp/master 
Splits SigSpec into bits before calling check_signal_in_fanout (solves #675)
 2018-12-01 04:11:19 +01:00
Sylvain Munaut 8d3ab626ea dff2dffe: Add option for unmap to only remove DFFE with low CE signal use 
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2018-11-27 21:50:42 +01:00
Clifford Wolf ab97eddee9 Add iteration limit to "opt_muxtree" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-11-20 17:56:47 +01:00
Niels Moseley cfc9b9147c DFFLIBMAP: changed 'missing pin' error into a warning with additional reason/info. 2018-11-06 12:11:52 +01:00
Clifford Wolf 719e29404a Allow square brackets in liberty identifiers 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-11-05 12:33:33 +01:00
Niels Moseley 04cd179696 Liberty file newline handling is more relaxed. More descriptive error message 2018-11-03 18:38:49 +01:00
Niels Moseley d1e8249f9a Report an error when a liberty file contains pin references that reference non-existing pins 2018-11-03 18:07:51 +01:00
rafaeltp f8b97e21f3 using [i] to access individual bits of SigSpec and merging bits into a tmp Sig before setting the port to new signal 2018-10-21 11:32:44 -07:00
rafaeltp 7b964bfb83 cleaning up for PR 2018-10-20 18:02:59 -07:00
rafaeltp ce069830c5 fixing code style 2018-10-20 17:57:26 -07:00
rafaeltp 0ad4321781 solves #675 2018-10-20 17:50:21 -07:00
Ruben Undheim 436e3c0a7c Refactor code to avoid code duplication + added comments 2018-10-20 16:06:48 +02:00
Ruben Undheim 397dfccb30 Support for SystemVerilog interfaces as a port in the top level module + test case 2018-10-20 11:58:25 +02:00
Clifford Wolf 6514443a5c
Merge pull request #672 from daveshah1/fix_bram 
memory_bram: Reset make_outreg when growing read ports
 2018-10-19 16:09:11 +02:00
David Shah 3420ae5ca5 memory_bram: Reset make_outreg when growing read ports 
Signed-off-by: David Shah <dave@ds0.me>
 2018-10-19 14:46:31 +01:00
Clifford Wolf f24bc1ed0a
Merge pull request #659 from rubund/sv_interfaces 
Support for SystemVerilog interfaces and modports
 2018-10-18 10:58:47 +02:00
Ruben Undheim c50afc4246 Documentation improvements etc. 
- Mention new feature in the SystemVerilog section in the README file
- Commented changes much better
- Rename a few signals to make it clearer
- Prevent warning for unused signals in an easier way
- Add myself as copyright holder to 2 files
- Fix one potential memory leak (delete 'wire' if not in modport)
 2018-10-13 20:34:44 +02:00
tklam f4343b3dc7 stop check_signal_in_fanout from traversing FFs 2018-10-13 23:24:24 +08:00
tklam 302edf0429 stop check_signal_in_fanout from traversing FFs 2018-10-13 23:11:19 +08:00
Ruben Undheim 458a94059e Support for 'modports' for System Verilog interfaces 2018-10-12 21:11:48 +02:00