7850a0c28a
flowmap: add link to longer version of paper. NFC.
2019-01-04 02:33:10 +00:00
d98fe8ce1f
Merge pull request #775 from whitequark/opt_flowmap
...
flowmap: new techmap pass
2019-01-03 17:03:18 +01:00
07af772a72
flowmap: new techmap pass.
2019-01-03 14:28:19 +00:00
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
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
979de95cf6
Merge pull request #750 from Icenowy/anlogic-ff-init
...
Initialization of Anlogic DFFs
2019-01-02 15:52:22 +01:00
2e606b1802
Merge pull request #773 from whitequark/opt_lut_elim_fixes
...
opt_lut: elimination fixes
2019-01-02 15:45:29 +01:00
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
c55dfb8369
opt_lut: reflect changes in sigmap.
...
Otherwise, some LUTs will be missed during elimination.
2019-01-02 10:21:58 +00:00
06143ab33f
opt_lut: use a worklist, and revisit cells affected by elimination.
2019-01-02 09:36:32 +00:00
f7363ac508
opt_lut: count eliminated cells, and set opt.did_something for them.
2019-01-02 09:14:43 +00:00
4fd458290c
opt_expr: refactor simplification of unsigned X<onehot and X>=onehot. NFCI.
2019-01-02 05:11:29 +00:00
9e9846a6ea
opt_expr: refactor simplification of signed X>=0 and X<0. NFCI.
2019-01-02 03:01:25 +00:00
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
42c356c49c
opt_lut: eliminate LUTs evaluating to constants or inputs.
2018-12-31 23:55:40 +00:00
0a840dd883
Fix handling of (* keep *) wires in wreduce
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-12-31 16:37:40 +01:00
18291c20d2
proc_clean: remove any empty cases if all cases use all-def compare.
2018-12-23 09:04:30 +00:00
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
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
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
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
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
2641a3089b
Revert "Proof-of-concept: preserve naming through ABC using dress"
2018-12-16 21:27:31 +01:00
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
f6412d7109
select: print selection if a -assert-* flag causes an error.
2018-12-16 15:44:29 +00:00
0d9c850a07
Merge pull request #735 from daveshah1/trifixes
...
deminout fixes
2018-12-16 16:02:21 +01:00
f53e19cc71
Fix equiv_opt indenting
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-12-16 15:57:28 +01:00
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
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
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
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
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
4c59447168
deminout: Consider $tribuf cells
...
Signed-off-by: David Shah <dave@ds0.me>
2018-12-12 17:17:40 +00:00
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
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
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
c38ea9ae65
equiv_opt: new command, for verifying optimization passes.
2018-12-07 17:20:34 +00:00
7ec740b7ad
opt_lut: leave intact LUTs with cascade feeding module outputs.
2018-12-07 17:13:52 +00:00
9eb03d458d
opt_lut: show original truth table for both cells.
2018-12-07 17:04:41 +00:00
a8ab722824
opt_lut: add -limit option, for debugging misoptimizations.
2018-12-07 16:36:26 +00:00
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
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
a9baee4b24
rename: add -src, for inferring names from source locations.
2018-12-05 20:35:13 +00:00
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
88217d0157
opt_lut: simplify type conversion. NFC.
2018-12-05 19:12:02 +00:00
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
45cb6200af
opt_lut: add -dlogic, to avoid disturbing logic such as carry chains.
2018-12-05 16:30:37 +00:00
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
59eea0183f
opt_lut: collect and display statistics.
2018-12-05 16:30:37 +00:00
e54c7e951c
opt_lut: refactor to use a worker. NFC.
2018-12-05 16:30:37 +00:00
9e072ec21f
opt_lut: new pass, to combine LUTs for tighter packing.
2018-12-05 16:30:37 +00:00
c800e3bb16
Fix typo
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-12-04 23:30:23 +01:00
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
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
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
ab97eddee9
Add iteration limit to "opt_muxtree"
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-11-20 17:56:47 +01:00
cfc9b9147c
DFFLIBMAP: changed 'missing pin' error into a warning with additional reason/info.
2018-11-06 12:11:52 +01:00
719e29404a
Allow square brackets in liberty identifiers
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-11-05 12:33:33 +01:00
04cd179696
Liberty file newline handling is more relaxed. More descriptive error message
2018-11-03 18:38:49 +01:00
d1e8249f9a
Report an error when a liberty file contains pin references that reference non-existing pins
2018-11-03 18:07:51 +01:00
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
7b964bfb83
cleaning up for PR
2018-10-20 18:02:59 -07:00
ce069830c5
fixing code style
2018-10-20 17:57:26 -07:00
0ad4321781
solves #675
2018-10-20 17:50:21 -07:00
436e3c0a7c
Refactor code to avoid code duplication + added comments
2018-10-20 16:06:48 +02:00
397dfccb30
Support for SystemVerilog interfaces as a port in the top level module + test case
2018-10-20 11:58:25 +02:00
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
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
f24bc1ed0a
Merge pull request #659 from rubund/sv_interfaces
...
Support for SystemVerilog interfaces and modports
2018-10-18 10:58:47 +02:00
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
f4343b3dc7
stop check_signal_in_fanout from traversing FFs
2018-10-13 23:24:24 +08:00
302edf0429
stop check_signal_in_fanout from traversing FFs
2018-10-13 23:11:19 +08:00
458a94059e
Support for 'modports' for System Verilog interfaces
2018-10-12 21:11:48 +02:00
75009ada3c
Synthesis support for SystemVerilog interfaces
...
This time doing the changes mostly in AST before RTLIL generation
2018-10-12 21:11:36 +02:00
b86eb3deef
fix bug: pass by reference
2018-09-26 17:57:39 +08:00
2b89074240
Fix issue #639
2018-09-26 16:11:45 +08:00
592a82c0ad
Merge pull request #625 from aman-goel/master
...
Minor revision to -expose in setundef pass
2018-09-14 12:36:13 +02:00
5fe16c25b8
Fixed minor typo in "sim" help message
2018-09-12 18:34:27 -04:00
75c1f8d241
Minor revision to -expose in setundef pass
...
Adds default value option as -undef when -expose used. Not having set the value mode set can cause the setundef pass to abort.
2018-09-10 21:44:36 -04:00
05466790a6
Merge pull request #606 from cr1901/show-win
...
`show` pass `-format` and `-viewer` improvements on Windows
2018-08-19 15:25:46 +02:00
83b41260f6
Revision to expose option in setundef pass
...
Corrects indentation
Simplifications and corrections
2018-08-18 09:08:07 +05:30
61f002c908
Merge pull request #3 from YosysHQ/master
...
Updates from official repo
2018-08-18 08:18:40 +05:30
7ce7ea2eb4
Update show pass documentation with Windows caveats.
2018-08-15 17:18:19 -04:00
9f91c62348
Fix run_command() when using -format and -viewer in show pass.
2018-08-15 17:18:19 -04:00
67b1026297
Merge pull request #591 from hzeller/virtual-override
...
Consistent use of 'override' for virtual methods in derived classes.
2018-08-15 14:05:38 +02:00
0eaab6cd1d
Add missing <deque> include (MSVC build fix)
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-07-22 15:21:59 +02:00
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
87aef8f0cc
Add async2sync pass
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-07-19 15:31:12 +02:00
5dcb899e76
Merge pull request #2 from YosysHQ/master
...
Merging with official repo
2018-07-18 11:34:18 -04:00
459d367913
ecp5: Adding synchronous set/reset support
...
Signed-off-by: David Shah <davey1576@gmail.com>
2018-07-14 16:18:01 +02:00
4d343fc1cd
Merging with official repo
2018-07-04 15:14:28 -04:00
5f2bc1ce76
Add automatic verific import in hierarchy command
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-06-20 23:45:01 +02:00
675a44b41a
Be slightly less aggressive in "deminout" pass
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-06-19 14:29:38 +02:00
d89560a0ba
Include module name for area summary stats
...
The PR prints the name of the module when displaying the final area count.
Pros:
- Easier for the user to `grep` for area information about a specific module
Cons:
- Arguably more verbose, less "pretty" than author desires
Verification:
~~~~
30c30
< Chip area for this module: 20616.349000
---
> Chip area for module '$paramod$d1738fc0bb353d517bc2caf8fef2abb20bced034\picorv32': 20616.349000
70c70
< Chip area for this module: 88.697700
---
> Chip area for module '\picorv32_axi_adapter': 88.697700
102c102
< Chip area for this module: 20705.046700
---
> Chip area for top module '\picorv32_axi': 20705.046700
~~~~
2018-06-18 17:29:01 -07:00
f273291dfe
Add setundef -anyseq / -anyconst support to -undriven mode
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-06-01 11:57:28 +02:00
4cd6d5556a
Add "setundef -anyconst"
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-06-01 11:49:58 +02:00
3ab79a231b
Bugfix in handling of array instances with empty ports
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-05-31 18:09:31 +02:00
cee4b1e6bc
Disable memory_dff for initialized FFs
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-05-28 17:16:15 +02:00
74efafc1cf
Add some cleanup code to memory_nordff
...
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2018-05-28 16:42:06 +02:00
9763e4d830
Fix infinite loop in abc command under emscripten
2018-05-18 22:42:39 -07:00
whitequark
Clifford Wolf
David Shah
Icenowy Zheng
David Shah
Graham Edgecombe
Sylvain Munaut
Niels Moseley
rafaeltp
Ruben Undheim
tklam
acw1251
Aman Goel
William D. Jones
Henner Zeller
Edmond Cote
Robert Ou