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440 Commits

Author SHA1 Message Date
Eddie Hung 3a87dc3524 Wrap A and B in sigmap 2019-07-19 13:23:07 -07:00
Eddie Hung 31b0002e8c Remove "top" from message 2019-07-19 13:20:45 -07:00
Eddie Hung bcd8027182 Also optimise MSB of $sub 2019-07-19 13:11:48 -07:00
Eddie Hung fc0e36d1c0 wreduce for $sub 2019-07-19 12:50:21 -07:00
whitequark 2de7e92bb8 opt_lut: make less chatty. 2019-07-13 16:49:56 +00:00
Eddie Hung 713337255e
Revert "Add "synth -keepdc" option" 2019-07-09 10:14:23 -07:00
Eddie Hung 37b58f4324 Clarify 'wreduce -keepdc' doc 2019-07-08 19:15:07 -07:00
Clifford Wolf 1c7ce251f3
Merge pull request #1046 from bogdanvuk/master 
Optimizing DFFs whose initial value prevents their value from changing
 2019-06-28 08:30:18 +02:00
Bogdan Vukobratovic 3225bfb984 Add help for "-sat" option inside opt_rmdff. "opt" can pass "-sat" too 2019-06-27 22:06:23 +02:00
Bogdan Vukobratovic 35fa7b3057 Fix memory leak when one of multiple DFF cells is removed in opt_rmdff 
When there are multiple DFFs and one of them is removed, its reference lingers
inside bit2driver dict. While invoking handle_dff() function for other DFFs,
this broken reference is used isnside sat_import_cell() function.
 2019-06-27 22:02:12 +02:00
Bogdan Vukobratovic 0f32cb4e0a Merge remote-tracking branch 'upstream/master' 2019-06-27 12:11:47 +02:00
Clifford Wolf 7c14678ec0 Add "pmux2shiftx -norange", fixes #1135 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-06-27 10:59:12 +02:00
Clifford Wolf 0b7d648c6a Improve opt_clean handling of unused public wires 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-06-26 17:54:17 +02:00
Clifford Wolf 8e9ef891fe Do not clean up buffer cells with "keep" attribute, closes #1128 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-06-26 11:01:03 +02:00
Eddie Hung 545cfbbe0d Cope with $reduce_or common in case 2019-06-21 12:31:14 -07:00
Eddie Hung 15535112b7 Fix spacing 2019-06-21 11:52:51 -07:00
Eddie Hung d89d663c92 Add doc 2019-06-21 11:52:28 -07:00
Eddie Hung 641b86d25f Fix up ExclusiveDatabase with @cliffordwolf's help 2019-06-21 11:45:31 -07:00
Clifford Wolf 2454ad99bf Refactor "opt_rmdff -sat" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-06-20 13:44:21 +02:00
Bogdan Vukobratovic 8451cbea89 Move netlist helper module to passes/opt for the time being 2019-06-14 12:14:02 +02:00
Bogdan Vukobratovic fe651922cb Merge remote-tracking branch 'upstream/master' 2019-06-14 12:06:57 +02:00
Bogdan Vukobratovic 53695e6729 Prepare for situation when port of the signal cannot be found 2019-06-14 11:39:24 +02:00
Bogdan Vukobratovic 291b36afeb Some cleanup, revert sat.cc 2019-06-14 11:35:45 +02:00
Bogdan Vukobratovic 8665f48879 Implement disconnection of constant register bits 2019-06-13 19:35:37 +02:00
Bogdan Vukobratovic d69989b8d2 Rename satgen_algo.h -> algo.h, code cleanup and refactoring 2019-06-12 19:35:05 +02:00
Bogdan Vukobratovic 9892df17ef Generate satgen instance instead of calling sat pass 2019-06-11 11:47:13 +02:00
Eddie Hung 5b999ae68d Elaborate muxpack doc 2019-06-10 10:32:19 -07:00
Eddie Hung f705f6a0b5 Comment O(N) -> O(N^2) 2019-06-07 15:39:12 -07:00
Eddie Hung ba52d9b471 Extend ExclusiveDatabase to query SigSpec-s (for $pmux) 2019-06-07 15:34:16 -07:00
Eddie Hung 9b408838f1 Add ExclusiveDatabase to check exclusive $eq/$logic_not cell results 2019-06-07 14:18:17 -07:00
Eddie Hung 887df8914c Resolve @cliffordwolf comment on redundant check 2019-06-07 11:37:52 -07:00
Eddie Hung 5ab59cd59e Resolve @cliffordwolf comment on sigmap 2019-06-07 11:36:19 -07:00
Eddie Hung 5c277c6325 Fix and test for balanced case 2019-06-06 14:21:34 -07:00
Eddie Hung ccdf989025 Support cascading $pmux.A with $mux.A and $mux.B 2019-06-06 13:51:22 -07:00
Eddie Hung dc7b8c4b94 More cleanup 2019-06-06 12:56:34 -07:00
Eddie Hung 978fda94f6 Fix spacing 2019-06-06 12:46:42 -07:00
Eddie Hung d2172c6846 Non chain user check using next_sig 2019-06-06 12:44:50 -07:00
Eddie Hung 83450a9489 Move muxpack from passes/techmap to passes/opt 2019-06-06 12:15:13 -07:00
Eddie Hung feb2ddb52b Fix typo in opt_rmdff 2019-06-05 14:08:14 -07:00
Clifford Wolf 8a6f9977f6 Suppress driver-driver conflict warning for unknown cell types, fixes #1065 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-06-05 09:14:12 +02:00
Bogdan Vukobratovic 9a468f81c4 Optimizing DFFs whose initial value prevents their value from changing 
This is a proof of concept implementation that invokes SAT solver via Pass::call
method.
 2019-05-28 08:48:21 +02:00
Clifford Wolf 2a9c68e2d6
Merge pull request #1026 from YosysHQ/clifford/fix1023 
Keep zero-width wires in opt_clean if and only if they are ports
 2019-05-27 13:24:19 +02:00
Eddie Hung d4fb6cac7c Revert enable check 2019-05-25 12:55:57 -07:00
Eddie Hung 822d0b7789 opt_rmdff to optimise even in presence of enable signal, even removing 2019-05-24 18:30:51 -07:00
Eddie Hung 0d66103cbb Add comments 2019-05-24 16:33:10 -07:00
Eddie Hung 357b1de6bc Resolve @cliffordwolf review, set even if !has_init 2019-05-24 16:15:22 -07:00
Eddie Hung 5ac7e38d0a Fix spacing 2019-05-23 12:58:30 -07:00
Eddie Hung 50ed34a6d0 opt_rmdff to work on $dffe and $_DFFE_* 2019-05-23 11:26:18 -07:00
Clifford Wolf e3f9ccf56d Keep zero-width wires in opt_clean if and only if they are ports, fixes #1023 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-22 13:57:36 +02:00
Clifford Wolf c4b8575f43 Add "wreduce -keepdc", fixes #1016 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-20 15:36:13 +02:00
Clifford Wolf a21a84b3b4 Improvements in opt_clean 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-15 16:01:28 +02:00
Clifford Wolf 8166a142dd Fix handling of glob_abort_cnt in opt_muxtree, fixes #1002 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-12 13:51:12 +02:00
Clifford Wolf a76189e7ad More opt_clean cleanups 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-07 14:41:58 +02:00
Clifford Wolf 752553d8e9
Merge pull request #946 from YosysHQ/clifford/specify 
Add specify parser
 2019-05-06 20:57:15 +02:00
Clifford Wolf d187be39d6 Merge branch 'master' of github.com:YosysHQ/yosys into clifford/fix968 2019-05-06 15:41:13 +02:00
Clifford Wolf ba6ce21a74 Cleanups in opt_clean 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-06 12:45:22 +02:00
Clifford Wolf c7f2e93024 Merge branch 'master' of github.com:YosysHQ/yosys into clifford/specify 2019-05-06 11:46:10 +02:00
Clifford Wolf a01386c0e4 Improve opt_clean handling of unused wires 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-04 09:47:16 +02:00
Eddie Hung d9c4644e88 Merge remote-tracking branch 'origin/master' into clifford/specify 2019-05-03 15:05:57 -07:00
Clifford Wolf 373b236108
Merge pull request #969 from YosysHQ/clifford/pmgenstuff 
Improve pmgen, Add "peepopt" pass with shift-mul pattern
 2019-05-03 20:39:50 +02:00
Clifford Wolf 42190207b4 Improve opt_expr and opt_clean handling of (partially) undriven and/or unused wires, fixes #981 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-03 14:25:01 +02:00
Clifford Wolf 5c2c0b4bb2 Further improve unused-detection for opt_clean driver-driver conflict warning 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-03 09:22:26 +02:00
Clifford Wolf f12e1155f1 Improve unused-detection for opt_clean driver-driver conflict warning 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-03 09:12:10 +02:00
Clifford Wolf a30b99e66e Silently resolve completely unused cell-vs-const driver-driver conflicts 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-01 09:29:34 +02:00
Clifford Wolf 32ff37bb5a Fix segfault in wreduce 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-30 22:20:45 +02:00
Clifford Wolf 9d117eba9d Add handling of init attributes in "opt_expr -undriven" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-30 14:46:12 +02:00
Clifford Wolf b515fd2d25 Add peepopt_muldiv, fixes #930 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-30 11:25:15 +02:00
Clifford Wolf 754b1ee4b3 Drive dangling wires with init attr with their init value, fixes #956 2019-04-29 08:44:53 +02:00
Clifford Wolf 71c38d9de5 Add $specrule cells for $setup/$hold/$skew specify rules 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-23 21:36:59 +02:00
Clifford Wolf 634482380c Preserve $specify[23] cells 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-23 21:36:59 +02:00
Clifford Wolf c84cdc711c Remove some left-over log_dump() 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-23 17:55:41 +02:00
Clifford Wolf 8ed4a53d99
Merge pull request #951 from YosysHQ/clifford/logdebug 
Add log_debug() framework
 2019-04-22 20:09:51 +02:00
Clifford Wolf e158ea2097 Add log_debug() framework 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-22 17:25:52 +02:00
Clifford Wolf 0f0ada13f4 Add full_pmux feature to pmux2shiftx 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-22 15:26:20 +02:00
Clifford Wolf fc23af1707 Auto-initialize OnehotDatabase on-demand in pmux2shiftx.cc 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-20 18:13:37 +02:00
Clifford Wolf 97e9caa4fa Add "onehot" pass, improve "pmux2shiftx" onehot handling 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-20 17:52:16 +02:00
Clifford Wolf b3a3e08e38 Improve "pmux2shiftx" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-20 02:03:44 +02:00
Clifford Wolf e06d158e8a Fix some typos 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-20 01:18:07 +02:00
Clifford Wolf 37728520a6 Improvements in "pmux2shiftx" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-20 01:15:48 +02:00
Clifford Wolf 0070184ea9 Improvements in pmux2shiftx 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-20 00:38:25 +02:00
Clifford Wolf 177878cbb0 Improve pmux2shift ctrl permutation finder 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-20 00:38:25 +02:00
Clifford Wolf 481f0015be Complete rewrite of pmux2shiftx 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-20 00:38:25 +02:00
Clifford Wolf 1bf8c2b823 Import initial pmux2shiftx from eddieh 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-20 00:38:25 +02:00
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
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
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
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
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 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 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 246391200e Add FF support to wreduce 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-20 16:36:42 +01:00
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 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 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