whitequark
c34d7b13f4
ast: avoid intermediate wires/assigns when lowering to AST_MEMINIT.
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Before this commit, every initial assignment to a memory generated
two wires and four assigns in a process. For unknown reasons (I did
not investigate), large amounts of assigns cause quadratic slowdown
later in the AST frontend, in processAst/removeSignalFromCaseTree.
As a consequence, common and reasonable Verilog code, such as:
reg [`WIDTH:0] mem [0:`DEPTH];
integer i; initial for (i = 0; i <= `DEPTH; i++) mem[i] = 0;
took extremely long time to be processed; around 80 s for a 8-wide,
8192-deep memory.
After this commit, initial assignments where address and/or data are
constant (after `generate`) do not incur the cost of intermediate
wires; expressions like `mem[i+1]=i^(i<<1)` are considered constant.
This results in speedups of orders of magnitude for common memory
sizes; it now takes merely 0.4 s to process a 8-wide, 8192-deep
memory, and only 5.8 s to process a 8-wide, 131072-deep one.
As a bonus, this change also results in nontrivial speedups later
in the synthesis pipeline, since pass sequencing issues meant that
all of these intermediate wires were subject to transformations such
as width reduction, even though they existed solely to be constant
folded away in `memory_collect`.
2020-02-07 00:41:54 +00:00
David Shah
4bfd2ef4f3
sv: Improve handling of wildcard port connections
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Signed-off-by: David Shah <dave@ds0.me>
2020-02-02 16:12:33 +00:00
David Shah
5df591c023
hierarchy: Resolve SV wildcard port connections
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Signed-off-by: David Shah <dave@ds0.me>
2020-02-02 16:12:33 +00:00
David Shah
50f86c11b2
sv: Add lexing and parsing of .* (wildcard port conns)
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Signed-off-by: David Shah <dave@ds0.me>
2020-02-02 16:12:33 +00:00
David Shah
9f5613100b
Merge pull request #1647 from YosysHQ/dave/sprintf
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ast: Add support for $sformatf system function
2020-02-02 14:53:46 +00:00
Claire Wolf
2ce7a0d369
Merge pull request #1667 from YosysHQ/clifford/verificnand
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Add Verific support for OPER_REDUCE_NAND
2020-01-30 19:55:53 +01:00
Claire Wolf
60876ce183
Merge pull request #1503 from YosysHQ/eddie/verific_help
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`verific` pass to print help message when command syntax error
2020-01-30 18:05:16 +01:00
Claire Wolf
ffadaddab5
Merge pull request #1654 from YosysHQ/eddie/sby_fix69
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verific: unflatten struct ports
2020-01-30 18:03:35 +01:00
Claire Wolf
23c44afaed
Add Verific support for OPER_REDUCE_NAND
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Signed-off-by: Claire Wolf <clifford@clifford.at>
2020-01-30 18:01:13 +01:00
Eddie Hung
6d27d43727
Add and use SigSpec::reverse()
2020-01-28 10:37:16 -08:00
Eddie Hung
ce6a690d27
xilinx/ice40/ecp5: undo permuting LUT masks in lut_map
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Now done in read_aiger
2020-01-27 13:30:27 -08:00
Eddie Hung
f443695a38
Merge remote-tracking branch 'origin/master' into eddie/verific_help
2020-01-27 10:34:10 -08:00
Eddie Hung
d730bba6d2
verific: no help() when no YOSYS_ENABLE_VERIFIC
2020-01-27 10:32:18 -08:00
Eddie Hung
7b445121cc
verific: also unflatten for 'hierarchy' flow as per @cliffordwolf
2020-01-27 10:15:22 -08:00
Eddie Hung
c7fbe13db5
read_aiger: set abc9_box_seq attr
2020-01-24 13:11:43 -08:00
Eddie Hung
cccc0ae112
verific: unflatten struct ports
2020-01-24 10:12:52 -08:00
Eddie Hung
73526a6f10
read_aiger: also parse abc9_mergeability
2020-01-22 14:21:25 -08:00
Eddie Hung
cd093c00f8
read_aiger: discard LUT inputs with nodeID == 0; not < 2
2020-01-21 11:56:30 -08:00
Eddie Hung
7f728bc116
read_aiger: ignore constant inputs on LUTs
2020-01-21 11:16:50 -08:00
David Shah
22c967e35e
ast: Add support for $sformatf system function
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Signed-off-by: David Shah <dave@ds0.me>
2020-01-19 21:20:17 +00:00
Eddie Hung
03ce2c72bb
Merge remote-tracking branch 'origin/master' into eddie/abc9_refactor
2020-01-15 16:42:16 -08:00
Eddie Hung
05c8858a90
read_aiger: $lut prefix in front
2020-01-15 14:31:32 -08:00
Eddie Hung
53a99ade9c
Merge remote-tracking branch 'origin/master' into eddie/abc9_refactor
2020-01-14 11:46:56 -08:00
Eddie Hung
f63f76c372
read_aiger: also rename "$0"
2020-01-14 09:01:53 -08:00
Eddie Hung
2c65e1abac
abc9: break SCC by setting (* keep *) on output wires
2020-01-13 21:45:27 -08:00
Eddie Hung
ee95fa959a
read_aiger: uniquify wires with $aiger<autoidx> prefix
2020-01-13 21:28:27 -08:00
Eddie Hung
766e16b525
read_aiger: make $and/$not/$lut the prefix not suffix
2020-01-13 17:34:37 -08:00
Eddie Hung
d979648b7a
read_aiger: more accurate debug message
2020-01-09 10:02:19 -08:00
Eddie Hung
943ea4bf9e
read_aiger: do not double-count outputs for flops
2020-01-09 08:55:36 -08:00
Eddie Hung
2ca8c10e7a
Merge remote-tracking branch 'origin/master' into eddie/abc9_refactor
2020-01-07 15:43:22 -08:00
Eddie Hung
2ac36031d4
read_aiger: consistency between ascii and binary; also name latches
2020-01-07 13:30:31 -08:00
Eddie Hung
8f5388ea5b
read_aiger fixes
2020-01-07 11:59:57 -08:00
Eddie Hung
b94cf0c126
read_aiger: connect identical signals together
2020-01-07 11:43:28 -08:00
Eddie Hung
baba33fbd3
read_aiger: cope with latches and POs with same name
2020-01-07 11:22:48 -08:00
Eddie Hung
738af17a26
read_aiger: default -clk_name to be empty
2020-01-07 11:21:45 -08:00
Eddie Hung
61a2a60595
read_aiger: do not process box connections, work standalone
2020-01-07 09:48:11 -08:00
Eddie Hung
b57f692a9e
read_aiger: consistency between ascii and binary
2020-01-07 09:32:34 -08:00
Eddie Hung
83616e7866
read_aiger: add -xaiger option
2020-01-06 12:43:29 -08:00
Eddie Hung
96db05aaef
parse_xaiger to not take box_lookup
2019-12-31 17:06:03 -08:00
Eddie Hung
e5ed8e8e21
parse_xaiger to reorder ports too
2019-12-31 16:50:22 -08:00
Eddie Hung
1ea1e8e54f
Merge remote-tracking branch 'origin/master' into xaig_dff
2019-12-20 13:56:13 -08:00
Eddie Hung
94f15f023c
Merge remote-tracking branch 'origin/master' into xaig_dff
2019-12-19 10:29:40 -08:00
Eddie Hung
d406f2ffd7
Merge pull request #1569 from YosysHQ/eddie/fix_1531
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verilog: preserve size of $genval$-s in for loops
2019-12-19 12:21:33 -05:00
Clifford Wolf
22dd9f107c
Send people to symbioticeda.com instead of verific.com
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Signed-off-by: Clifford Wolf <clifford@clifford.at>
2019-12-18 13:06:34 +01:00
Eddie Hung
a6fdb9f5c1
aiger frontend to user shorter, $-prefixed, names
2019-12-17 15:50:01 -08:00
Eddie Hung
5f50e4f112
Cleanup xaiger, remove unnecessary complexity with inout
2019-12-17 15:45:26 -08:00
Eddie Hung
0875a07871
read_xaiger to cope with optional '\n' after 'c'
2019-12-17 15:45:26 -08:00
Eddie Hung
c0339bbbf1
Name inputs/outputs of aiger 'i%d' and 'o%d'
2019-12-13 16:21:09 -08:00
Rodrigo Alejandro Melo
e9dc2759c4
Fixed some missing "verilog_" in documentation
2019-12-13 10:17:05 -03:00
Eddie Hung
1ac1697e15
Stray log_dump
2019-12-11 16:59:00 -08:00
