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14834 commits 93 branches 53 tags 44 MiB
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628 commits

Author SHA1 Message Date
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
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
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
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
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
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