yosys.git
5 years agoMerge pull request #750 from Icenowy/anlogic-ff-init
Clifford Wolf [Wed, 2 Jan 2019 14:52:22 +0000 (15:52 +0100)]
Merge pull request #750 from Icenowy/anlogic-ff-init

Initialization of Anlogic DFFs

5 years agoMerge pull request #773 from whitequark/opt_lut_elim_fixes
Clifford Wolf [Wed, 2 Jan 2019 14:45:29 +0000 (15:45 +0100)]
Merge pull request #773 from whitequark/opt_lut_elim_fixes

opt_lut: elimination fixes

5 years agoMerge pull request #772 from whitequark/synth_lut
Clifford Wolf [Wed, 2 Jan 2019 14:44:57 +0000 (15:44 +0100)]
Merge pull request #772 from whitequark/synth_lut

synth: add k-LUT mode

5 years agoMerge pull request #771 from whitequark/techmap_cmp2lut
Clifford Wolf [Wed, 2 Jan 2019 14:43:10 +0000 (15:43 +0100)]
Merge pull request #771 from whitequark/techmap_cmp2lut

cmp2lut: new techmap pass

5 years agoFix VerificImporter asymmetric memories error message
Clifford Wolf [Wed, 2 Jan 2019 14:05:23 +0000 (15:05 +0100)]
Fix VerificImporter asymmetric memories error message

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoMerge pull request #769 from whitequark/typos
Clifford Wolf [Wed, 2 Jan 2019 13:47:18 +0000 (14:47 +0100)]
Merge pull request #769 from whitequark/typos

Fix typographical and grammatical errors and inconsistencies

5 years agoFix typographical and grammatical errors and inconsistencies.
whitequark [Fri, 7 Dec 2018 19:14:07 +0000 (19:14 +0000)]
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.

5 years agoopt_lut: reflect changes in sigmap.
whitequark [Wed, 2 Jan 2019 10:21:58 +0000 (10:21 +0000)]
opt_lut: reflect changes in sigmap.

Otherwise, some LUTs will be missed during elimination.

5 years agoopt_lut: use a worklist, and revisit cells affected by elimination.
whitequark [Wed, 2 Jan 2019 09:36:32 +0000 (09:36 +0000)]
opt_lut: use a worklist, and revisit cells affected by elimination.

5 years agoopt_lut: count eliminated cells, and set opt.did_something for them.
whitequark [Wed, 2 Jan 2019 08:40:01 +0000 (08:40 +0000)]
opt_lut: count eliminated cells, and set opt.did_something for them.

5 years agosynth_ice40: use 4-LUT coarse synthesis mode.
whitequark [Wed, 2 Jan 2019 08:25:55 +0000 (08:25 +0000)]
synth_ice40: use 4-LUT coarse synthesis mode.

5 years agosynth: add k-LUT mode.
whitequark [Wed, 2 Jan 2019 08:25:03 +0000 (08:25 +0000)]
synth: add k-LUT mode.

5 years agosynth: improve script documentation. NFC.
whitequark [Wed, 2 Jan 2019 08:05:44 +0000 (08:05 +0000)]
synth: improve script documentation. NFC.

5 years agocmp2lut: new techmap pass.
whitequark [Wed, 2 Jan 2019 07:53:31 +0000 (07:53 +0000)]
cmp2lut: new techmap pass.

5 years agoMerge pull request #768 from whitequark/opt_lut_elim
Clifford Wolf [Tue, 1 Jan 2019 10:13:48 +0000 (11:13 +0100)]
Merge pull request #768 from whitequark/opt_lut_elim

opt_lut: eliminate LUTs evaluating to constants or inputs

5 years agoopt_lut: eliminate LUTs evaluating to constants or inputs.
whitequark [Mon, 31 Dec 2018 23:53:23 +0000 (23:53 +0000)]
opt_lut: eliminate LUTs evaluating to constants or inputs.

5 years agoFix handling of (* keep *) wires in wreduce
Clifford Wolf [Mon, 31 Dec 2018 15:34:27 +0000 (16:34 +0100)]
Fix handling of (* keep *) wires in wreduce

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoMerge pull request #766 from Icenowy/anlogic-latches
Clifford Wolf [Mon, 31 Dec 2018 14:52:01 +0000 (15:52 +0100)]
Merge pull request #766 from Icenowy/anlogic-latches

anlogic: add latch cells

5 years agoFix 7 instances of add_share_file to add_gen_share_file
Larry Doolittle [Fri, 28 Dec 2018 16:21:53 +0000 (08:21 -0800)]
Fix 7 instances of add_share_file to add_gen_share_file

in techlibs/ecp5/Makefile.inc to permit out-of-tree builds

5 years agoSquelch a little more trailing whitespace
Larry Doolittle [Fri, 28 Dec 2018 16:24:31 +0000 (08:24 -0800)]
Squelch a little more trailing whitespace

5 years agoanlogic: add latch cells
Icenowy Zheng [Tue, 25 Dec 2018 14:47:46 +0000 (22:47 +0800)]
anlogic: add latch cells

Add latch cells to Anlogic cells replacement library by copying other
FPGAs' latch code to it.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
5 years agoMerge pull request #761 from whitequark/proc_clean_partial
Clifford Wolf [Sun, 23 Dec 2018 15:16:06 +0000 (16:16 +0100)]
Merge pull request #761 from whitequark/proc_clean_partial

proc_clean: remove any empty cases, if possible to do safely

5 years agoAdd "read_ilang -[no]overwrite"
Clifford Wolf [Sun, 23 Dec 2018 14:45:09 +0000 (15:45 +0100)]
Add "read_ilang -[no]overwrite"

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoMerge branch 'master' of github.com:YosysHQ/yosys
Clifford Wolf [Sun, 23 Dec 2018 14:44:19 +0000 (15:44 +0100)]
Merge branch 'master' of github.com:YosysHQ/yosys

5 years agoproc_clean: remove any empty cases if all cases use all-def compare.
whitequark [Sun, 23 Dec 2018 09:04:23 +0000 (09:04 +0000)]
proc_clean: remove any empty cases if all cases use all-def compare.

5 years agoMerge pull request #757 from whitequark/manual_mem
Clifford Wolf [Sat, 22 Dec 2018 19:12:18 +0000 (20:12 +0100)]
Merge pull request #757 from whitequark/manual_mem

manual: document $meminit cell and memory_* passes

5 years agoproc_clean: remove any empty cases at the end of the switch.
whitequark [Sat, 22 Dec 2018 08:58:37 +0000 (08:58 +0000)]
proc_clean: remove any empty cases at the end of the switch.

Previously, only completely empty switches were removed.

5 years agomanual: make description of $meminit ports match reality.
whitequark [Fri, 21 Dec 2018 01:26:08 +0000 (01:26 +0000)]
manual: make description of $meminit ports match reality.

5 years agoMerge pull request #758 from whitequark/tcl_script_args
Clifford Wolf [Fri, 21 Dec 2018 16:56:43 +0000 (17:56 +0100)]
Merge pull request #758 from whitequark/tcl_script_args

tcl: add support for passing arguments to scripts

5 years agoMerge pull request #759 from whitequark/memory_collect_init_x
Clifford Wolf [Fri, 21 Dec 2018 16:39:52 +0000 (17:39 +0100)]
Merge pull request #759 from whitequark/memory_collect_init_x

memory_collect: do not truncate 'x from \INIT

5 years agomemory_collect: do not truncate 'x from \INIT.
whitequark [Fri, 21 Dec 2018 02:01:27 +0000 (02:01 +0000)]
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.

5 years agomanual: fix typos.
whitequark [Thu, 20 Dec 2018 07:59:40 +0000 (07:59 +0000)]
manual: fix typos.

5 years agotcl: add support for passing arguments to scripts.
whitequark [Thu, 20 Dec 2018 07:29:46 +0000 (07:29 +0000)]
tcl: add support for passing arguments to scripts.

5 years agomanual: document $meminit cell and memory_* passes.
whitequark [Thu, 20 Dec 2018 04:37:28 +0000 (04:37 +0000)]
manual: document $meminit cell and memory_* passes.

5 years agoMerge pull request #752 from Icenowy/anlogic-lut-cost
Clifford Wolf [Wed, 19 Dec 2018 18:52:31 +0000 (19:52 +0100)]
Merge pull request #752 from Icenowy/anlogic-lut-cost

Anlogic: let LUT5/6 have more cost than LUT4-

5 years agoMerge pull request #753 from Icenowy/anlogic-makefile-fix
Clifford Wolf [Wed, 19 Dec 2018 18:51:10 +0000 (19:51 +0100)]
Merge pull request #753 from Icenowy/anlogic-makefile-fix

anlogic: fix Makefile.inc

5 years agoMerge pull request #749 from Icenowy/anlogic-dram-fix
Clifford Wolf [Wed, 19 Dec 2018 18:48:54 +0000 (19:48 +0100)]
Merge pull request #749 from Icenowy/anlogic-dram-fix

anlogic: fix dbits of Anlogic Eagle DRAM16X4

5 years agoanlogic: fix Makefile.inc
Icenowy Zheng [Wed, 19 Dec 2018 02:23:58 +0000 (10:23 +0800)]
anlogic: fix Makefile.inc

During the addition of DRAM inferring support, the installation of
eagle_bb.v is accidentally removed.

Fix this issue.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
5 years agoAnlogic: let LUT5/6 have more cost than LUT4-
Icenowy Zheng [Wed, 19 Dec 2018 01:36:53 +0000 (09:36 +0800)]
Anlogic: let LUT5/6 have more cost than LUT4-

According to the datasheet of Anlogic Eagle FPGAs, The LUTs natively
in an Anlogic FPGA is LUT4 (in MSLICEs) and "Enhanced LUT5" (in
LSLICEs). An "Enhanced LUT5" can be divided into two LUT4s.

So a LUT5 will cost around 2x resource of a LUT4, and a LUT6 will cost
2x resource of a LUT5.

Change the -lut parameter passed to the abc command to pass this cost
info to the ABC process.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
5 years agoMinor style fixes
Clifford Wolf [Tue, 18 Dec 2018 19:02:39 +0000 (20:02 +0100)]
Minor style fixes

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoMerge pull request #748 from makaimann/add-btor-ops
Clifford Wolf [Tue, 18 Dec 2018 18:59:29 +0000 (19:59 +0100)]
Merge pull request #748 from makaimann/add-btor-ops

Add btor ops for $mul, $div, $mod and $concat

5 years agoMerge pull request #751 from daveshah1/fix_589
Clifford Wolf [Tue, 18 Dec 2018 18:55:42 +0000 (19:55 +0100)]
Merge pull request #751 from daveshah1/fix_589

memory_dff: Fix typo when checking init value

5 years agomemory_dff: Fix typo when checking init value
David Shah [Tue, 18 Dec 2018 17:40:01 +0000 (17:40 +0000)]
memory_dff: Fix typo when checking init value

Signed-off-by: David Shah <davey1576@gmail.com>
5 years agoFix segfault in AST simplify
Clifford Wolf [Tue, 18 Dec 2018 16:49:38 +0000 (17:49 +0100)]
Fix segfault in AST simplify

(as proposed by Dan Gisselquist)

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoanlogic: set the init value of DFFs
Icenowy Zheng [Tue, 18 Dec 2018 07:39:02 +0000 (15:39 +0800)]
anlogic: set the init value of DFFs

As dffinit has already supported for different initialization strings
for DFFs and check for re-initialization, initialization of Anlogic
DFFs are now ready to go.

Support for set the init values of Anlogic DFFs.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
5 years agoAdd "dffinit -noreinit" parameter
Icenowy Zheng [Tue, 18 Dec 2018 15:10:40 +0000 (23:10 +0800)]
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>
5 years agoImprove src tagging (using names and attrs) of cells and wires in verific front-end
Clifford Wolf [Tue, 18 Dec 2018 15:01:22 +0000 (16:01 +0100)]
Improve src tagging (using names and attrs) of cells and wires in verific front-end

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoAdd "dffinit -strinit high low"
Icenowy Zheng [Tue, 18 Dec 2018 07:37:43 +0000 (15:37 +0800)]
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>
5 years agoanlogic: fix dbits of Anlogic Eagle DRAM16X4
Icenowy Zheng [Tue, 18 Dec 2018 06:38:44 +0000 (14:38 +0800)]
anlogic: fix dbits of Anlogic Eagle DRAM16X4

The dbits of DRAM16X4 is wrong set to 2, which leads to waste of DRAM
bits.

Fix the dbits number in the RAM configuration.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
5 years agoAdd btor ops for $mul, $div, $mod and $concat
makaimann [Mon, 5 Nov 2018 19:49:31 +0000 (11:49 -0800)]
Add btor ops for $mul, $div, $mod and $concat

5 years agoMerge pull request #746 from Icenowy/anlogic-dram
Clifford Wolf [Mon, 17 Dec 2018 16:16:10 +0000 (17:16 +0100)]
Merge pull request #746 from Icenowy/anlogic-dram

Support for DRAM inferring on Anlogic FPGAs

5 years agoMerge pull request #742 from whitequark/changelog
Clifford Wolf [Mon, 17 Dec 2018 15:35:56 +0000 (16:35 +0100)]
Merge pull request #742 from whitequark/changelog

Update CHANGELOG to mention my improvements

5 years agoMerge pull request #741 from whitequark/ilang_slice_sigspec
Clifford Wolf [Mon, 17 Dec 2018 15:29:25 +0000 (16:29 +0100)]
Merge pull request #741 from whitequark/ilang_slice_sigspec

read_ilang: allow slicing all sigspecs, not just wires

5 years agoMerge pull request #744 from whitequark/write_verilog_$shift
Clifford Wolf [Mon, 17 Dec 2018 15:26:57 +0000 (16:26 +0100)]
Merge pull request #744 from whitequark/write_verilog_$shift

write_verilog: handle the $shift cell

5 years agoanlogic: add support for Eagle Distributed RAM
Icenowy Zheng [Fri, 14 Dec 2018 08:50:37 +0000 (16:50 +0800)]
anlogic: add support for Eagle Distributed RAM

The MSLICEs on the Eagle series of FPGA can be configured as Distributed
RAM.

Enable to synthesis to DRAM.

As the Anlogic software suite doesn't support any 'bx to exist in the
initializtion data of DRAM, do not enable the initialization support of
the inferred DRAM.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
5 years agoRevert "Leave only real black box cells"
Icenowy Zheng [Fri, 14 Dec 2018 08:46:01 +0000 (16:46 +0800)]
Revert "Leave only real black box cells"

This reverts commit 43030db5fff285de85096aaf5578b0548659f6b7.

For a synthesis tool, generating EG_LOGIC cells are a good choice, as
they can be furtherly optimized when PnR, although sometimes EG_LOGIC is
not as blackbox as EG_PHY cells (because the latter is more close to the
hardware implementation).

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
5 years agoMerge pull request #745 from YosysHQ/revert-714-abc_preserve_naming
Clifford Wolf [Sun, 16 Dec 2018 20:27:56 +0000 (21:27 +0100)]
Merge pull request #745 from YosysHQ/revert-714-abc_preserve_naming

Revert "Proof-of-concept: preserve naming through ABC using dress"

5 years agoRevert "Proof-of-concept: preserve naming through ABC using dress"
Clifford Wolf [Sun, 16 Dec 2018 20:27:31 +0000 (21:27 +0100)]
Revert "Proof-of-concept: preserve naming through ABC using dress"

5 years agowrite_verilog: handle the $shift cell.
whitequark [Sun, 16 Dec 2018 18:46:32 +0000 (18:46 +0000)]
write_verilog: handle the $shift cell.

The implementation corresponds to the following Verilog, which is
lifted straight from simlib.v:

    module \\$shift (A, B, Y);

    parameter A_SIGNED = 0;
    parameter B_SIGNED = 0;
    parameter A_WIDTH = 0;
    parameter B_WIDTH = 0;
    parameter Y_WIDTH = 0;

    input [A_WIDTH-1:0] A;
    input [B_WIDTH-1:0] B;
    output [Y_WIDTH-1:0] Y;

    generate
        if (B_SIGNED) begin:BLOCK1
            assign Y = $signed(B) < 0 ? A << -B : A >> B;
        end else begin:BLOCK2
            assign Y = A >> B;
        end
    endgenerate

    endmodule

5 years agoUpdate CHANGELOG.
whitequark [Sun, 16 Dec 2018 18:25:53 +0000 (18:25 +0000)]
Update CHANGELOG.

5 years agoread_ilang: allow slicing sigspecs.
whitequark [Sun, 16 Dec 2018 17:50:36 +0000 (17:50 +0000)]
read_ilang: allow slicing sigspecs.

5 years agoMerge pull request #736 from whitequark/select_assert_list
Clifford Wolf [Sun, 16 Dec 2018 15:45:49 +0000 (16:45 +0100)]
Merge pull request #736 from whitequark/select_assert_list

select: print selection if a -assert-* flag causes an error

5 years agoselect: print selection if a -assert-* flag causes an error.
whitequark [Thu, 13 Dec 2018 04:31:58 +0000 (04:31 +0000)]
select: print selection if a -assert-* flag causes an error.

5 years agoRename "fine:" label to "map:" in "synth_ice40"
Clifford Wolf [Sun, 16 Dec 2018 15:36:19 +0000 (16:36 +0100)]
Rename "fine:" label to "map:" in "synth_ice40"

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoMerge pull request #704 from webhat/feature/fix-awk
Clifford Wolf [Sun, 16 Dec 2018 15:31:37 +0000 (16:31 +0100)]
Merge pull request #704 from webhat/feature/fix-awk

Using awk rather than gawk

5 years agowrite_verilog: add a missing newline.
whitequark [Thu, 13 Dec 2018 04:36:02 +0000 (04:36 +0000)]
write_verilog: add a missing newline.

5 years agoMerge pull request #738 from smunaut/issue_737
Clifford Wolf [Sun, 16 Dec 2018 15:05:14 +0000 (16:05 +0100)]
Merge pull request #738 from smunaut/issue_737

verilog_parser: Properly handle recursion when processing attributes

5 years agoMerge pull request #735 from daveshah1/trifixes
Clifford Wolf [Sun, 16 Dec 2018 15:02:21 +0000 (16:02 +0100)]
Merge pull request #735 from daveshah1/trifixes

deminout fixes

5 years agoMerge pull request #739 from whitequark/patch-1
Clifford Wolf [Sun, 16 Dec 2018 15:01:13 +0000 (16:01 +0100)]
Merge pull request #739 from whitequark/patch-1

Add .editorconfig file

5 years agoAdd .editorconfig file.
whitequark [Sun, 16 Dec 2018 14:57:43 +0000 (14:57 +0000)]
Add .editorconfig file.

See https://editorconfig.org/ for details.

5 years agoFix equiv_opt indenting
Clifford Wolf [Sun, 16 Dec 2018 14:57:28 +0000 (15:57 +0100)]
Fix equiv_opt indenting

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoMerge pull request #724 from whitequark/equiv_opt
Clifford Wolf [Sun, 16 Dec 2018 14:54:26 +0000 (15:54 +0100)]
Merge pull request #724 from whitequark/equiv_opt

equiv_opt: new command, for verifying optimization passes

5 years agoMerge pull request #734 from grahamedgecombe/fix-shuffled-bram-initdata
Clifford Wolf [Sun, 16 Dec 2018 14:53:44 +0000 (15:53 +0100)]
Merge pull request #734 from grahamedgecombe/fix-shuffled-bram-initdata

memory_bram: Fix initdata bit order after shuffling

5 years agoMerge pull request #730 from smunaut/ffssr_dont_touch
Clifford Wolf [Sun, 16 Dec 2018 14:50:42 +0000 (15:50 +0100)]
Merge pull request #730 from smunaut/ffssr_dont_touch

ice40: Honor the "dont_touch" attribute in FFSSR pass

5 years agoMerge pull request #729 from whitequark/write_verilog_initial
Clifford Wolf [Sun, 16 Dec 2018 14:50:16 +0000 (15:50 +0100)]
Merge pull request #729 from whitequark/write_verilog_initial

write_verilog: correctly map RTLIL `sync init`

5 years agoMerge pull request #725 from olofk/ram4k-init
Clifford Wolf [Sun, 16 Dec 2018 14:42:04 +0000 (15:42 +0100)]
Merge pull request #725 from olofk/ram4k-init

Only use non-blocking assignments of SB_RAM40_4K for yosys

5 years agoMerge pull request #714 from daveshah1/abc_preserve_naming
Clifford Wolf [Sun, 16 Dec 2018 14:41:30 +0000 (15:41 +0100)]
Merge pull request #714 from daveshah1/abc_preserve_naming

Proof-of-concept: preserve naming through ABC using dress

5 years agoMerge pull request #723 from whitequark/synth_ice40_map_gates
Clifford Wolf [Sun, 16 Dec 2018 14:30:08 +0000 (15:30 +0100)]
Merge pull request #723 from whitequark/synth_ice40_map_gates

synth_ice40: split `map_gates` off `fine`

5 years agoMerge pull request #722 from whitequark/rename_src
Clifford Wolf [Sun, 16 Dec 2018 14:28:29 +0000 (15:28 +0100)]
Merge pull request #722 from whitequark/rename_src

rename: add -src, for inferring names from source locations

5 years agoMerge pull request #720 from whitequark/master
Clifford Wolf [Sun, 16 Dec 2018 14:27:23 +0000 (15:27 +0100)]
Merge pull request #720 from whitequark/master

lut2mux: handle 1-bit INIT constant in $lut cells

5 years agoverilog_parser: Properly handle recursion when processing attributes
Sylvain Munaut [Thu, 13 Dec 2018 17:47:05 +0000 (18:47 +0100)]
verilog_parser: Properly handle recursion when processing attributes

Fixes #737

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
5 years agodeminout: Consider $tribuf cells
David Shah [Wed, 12 Dec 2018 17:17:36 +0000 (17:17 +0000)]
deminout: Consider $tribuf cells

Signed-off-by: David Shah <dave@ds0.me>
5 years agodeminout: Don't demote constant-driven inouts to inputs
David Shah [Wed, 12 Dec 2018 16:50:46 +0000 (16:50 +0000)]
deminout: Don't demote constant-driven inouts to inputs

Signed-off-by: David Shah <dave@ds0.me>
5 years agomemory_bram: Fix initdata bit order after shuffling
Graham Edgecombe [Sat, 8 Dec 2018 09:59:56 +0000 (09:59 +0000)]
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.

5 years agoAdd yosys-smtbmc support for btor witness
Clifford Wolf [Mon, 10 Dec 2018 02:43:07 +0000 (03:43 +0100)]
Add yosys-smtbmc support for btor witness

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoice40: Honor the "dont_touch" attribute in FFSSR pass
Sylvain Munaut [Sat, 8 Dec 2018 21:46:28 +0000 (22:46 +0100)]
ice40: Honor the "dont_touch" attribute in FFSSR pass

This is useful if you want to place FF manually ... can't merge SR in those
because it might make the manual placement invalid

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
5 years agoAdd "yosys-smtbmc --btorwit" skeleton
Clifford Wolf [Sat, 8 Dec 2018 05:59:27 +0000 (06:59 +0100)]
Add "yosys-smtbmc --btorwit" skeleton

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoFix btor init value handling
Clifford Wolf [Sat, 8 Dec 2018 05:21:31 +0000 (06:21 +0100)]
Fix btor init value handling

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agowrite_verilog: correctly map RTLIL `sync init`.
whitequark [Fri, 7 Dec 2018 18:48:06 +0000 (18:48 +0000)]
write_verilog: correctly map RTLIL `sync init`.

5 years agoequiv_opt: pass -D EQUIV when techmapping.
whitequark [Fri, 7 Dec 2018 16:58:33 +0000 (16:58 +0000)]
equiv_opt: pass -D EQUIV when techmapping.

This allows avoiding techmap crashes e.g. because of large memories
in white-box cell models.

5 years agoequiv_opt: new command, for verifying optimization passes.
whitequark [Thu, 6 Dec 2018 14:28:20 +0000 (14:28 +0000)]
equiv_opt: new command, for verifying optimization passes.

5 years agoMerge pull request #727 from whitequark/opt_lut
David Shah [Fri, 7 Dec 2018 17:17:26 +0000 (17:17 +0000)]
Merge pull request #727 from whitequark/opt_lut

 opt_lut: leave intact LUTs with cascade feeding module outputs

5 years agoopt_lut: leave intact LUTs with cascade feeding module outputs.
whitequark [Fri, 7 Dec 2018 17:13:52 +0000 (17:13 +0000)]
opt_lut: leave intact LUTs with cascade feeding module outputs.

5 years agoopt_lut: show original truth table for both cells.
whitequark [Fri, 7 Dec 2018 17:04:41 +0000 (17:04 +0000)]
opt_lut: show original truth table for both cells.

5 years agoopt_lut: add -limit option, for debugging misoptimizations.
whitequark [Fri, 7 Dec 2018 16:31:15 +0000 (16:31 +0000)]
opt_lut: add -limit option, for debugging misoptimizations.

5 years agoOnly use non-blocking assignments of SB_RAM40_4K for yosys
Olof Kindgren [Thu, 6 Dec 2018 20:45:59 +0000 (21:45 +0100)]
Only use non-blocking assignments of SB_RAM40_4K for yosys

In an initial statement, blocking assignments are normally used
and e.g. verilator throws a warning if non-blocking ones are used.

Yosys cannot however properly resolve the interdependencies if
blocking assignments are used in the initialization of SB_RAM_40_4K
and thus this has been used.

This patch will change to use non-blocking assignments only for yosys

5 years agoabc: Preserve naming through ABC using 'dress' command
David Shah [Tue, 4 Dec 2018 14:17:47 +0000 (14:17 +0000)]
abc: Preserve naming through ABC using 'dress' command

Signed-off-by: David Shah <dave@ds0.me>
5 years agosynth_ice40: split `map_gates` off `fine`.
whitequark [Thu, 6 Dec 2018 12:02:42 +0000 (12:02 +0000)]
synth_ice40: split `map_gates` off `fine`.

5 years agoAdd missing .gitignore
Clifford Wolf [Thu, 6 Dec 2018 06:29:37 +0000 (07:29 +0100)]
Add missing .gitignore

Signed-off-by: Clifford Wolf <clifford@clifford.at>
5 years agoBugfix in opt_expr handling of a<0 and a>=0
Clifford Wolf [Thu, 6 Dec 2018 06:29:21 +0000 (07:29 +0100)]
Bugfix in opt_expr handling of a<0 and a>=0

Signed-off-by: Clifford Wolf <clifford@clifford.at>