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358 Commits

Author SHA1 Message Date
Eddie Hung 06f8f2654a Working 2019-03-15 19:13:40 -07:00
Eddie Hung 8af9979aab Revert "Add shregmap -init_msb_first and use in synth_xilinx" 
This reverts commit 26ecbc1aee.
 2019-03-14 09:01:48 -07:00
Eddie Hung f1a8e8a480 Merge remote-tracking branch 'origin/master' into xc7srl 2019-03-14 08:59:19 -07:00
Eddie Hung 26ecbc1aee Add shregmap -init_msb_first and use in synth_xilinx 2019-03-14 08:10:02 -07:00
Larry Doolittle 61fc411c5d Clean up some whitepsace outliers 2019-02-26 09:39:46 -08:00
David Shah 58c22dae31 abc: Improved recovered netnames, also preserve src on nets with dress 
Signed-off-by: David Shah <davey1576@gmail.com>
 2019-02-06 22:23:13 +01:00
David Shah 8524a479b1 abc: Preserve naming through ABC using 'dress' command 
Signed-off-by: David Shah <dave@ds0.me>
 2019-02-06 22:23:13 +01:00
whitequark e792bd56b7 flowmap: clean up terminology. 
* "map": group gates into LUTs;
  * "pack": replace gates with LUTs.

This is important because we have FlowMap and DF-Map, and currently
our messages are ambiguous.

Also clean up some other log messages while we're at it.
 2019-01-08 02:05:06 +00:00
whitequark 211c26a4c9 flowmap: implement depth relaxation. 2019-01-08 01:13:05 +00:00
whitequark 8b44198e23 flowmap: construct a max-volume max-flow min-cut, not just any one. 2019-01-06 19:51:37 +00:00
whitequark 2fcc1ee72e flowmap: add -minlut option, to allow postprocessing with opt_lut. 2019-01-04 21:18:03 +00:00
whitequark 9bc5cf0844 flowmap: cleanup for clarity. NFCI. 2019-01-04 13:04:20 +00:00
whitequark fd21564deb flowmap: improve debug graph output. NFC. 2019-01-04 03:30:04 +00:00
whitequark 7850a0c28a flowmap: add link to longer version of paper. NFC. 2019-01-04 02:33:10 +00:00
whitequark 07af772a72 flowmap: new techmap pass. 2019-01-03 14:28:19 +00:00
Icenowy Zheng 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
Icenowy Zheng 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
Clifford Wolf 2641a3089b
Revert "Proof-of-concept: preserve naming through ABC using dress" 2018-12-16 21:27:31 +01:00
Clifford Wolf 0d9c850a07
Merge pull request #735 from daveshah1/trifixes 
deminout fixes
 2018-12-16 16:02:21 +01:00
Clifford Wolf 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
David Shah 4c59447168 deminout: Consider $tribuf cells 
Signed-off-by: David Shah <dave@ds0.me>
 2018-12-12 17:17:40 +00:00
David Shah 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
David Shah 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
whitequark 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
Clifford Wolf c800e3bb16 Fix typo 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-12-04 23:30:23 +01:00
Sylvain Munaut 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
Niels Moseley cfc9b9147c DFFLIBMAP: changed 'missing pin' error into a warning with additional reason/info. 2018-11-06 12:11:52 +01:00
Clifford Wolf 719e29404a Allow square brackets in liberty identifiers 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-11-05 12:33:33 +01:00
Niels Moseley 04cd179696 Liberty file newline handling is more relaxed. More descriptive error message 2018-11-03 18:38:49 +01:00
Niels Moseley d1e8249f9a Report an error when a liberty file contains pin references that reference non-existing pins 2018-11-03 18:07:51 +01:00
Clifford Wolf 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
Clifford Wolf 0eaab6cd1d Add missing <deque> include (MSVC build fix) 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-07-22 15:21:59 +02:00
Henner Zeller 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
David Shah 459d367913 ecp5: Adding synchronous set/reset support 
Signed-off-by: David Shah <davey1576@gmail.com>
 2018-07-14 16:18:01 +02:00
Clifford Wolf 675a44b41a Be slightly less aggressive in "deminout" pass 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-06-19 14:29:38 +02:00
Robert Ou 9763e4d830 Fix infinite loop in abc command under emscripten 2018-05-18 22:42:39 -07:00
Robert Ou bfce3a7479 Add an option to statically link abc into yosys 
This is currently incomplete because the output filter no longer works.
 2018-05-18 22:35:28 -07:00
Clifford Wolf fe80b39f56 Fix iopadmap for loops between tristate IO buffers 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-05-15 14:02:27 +02:00
Clifford Wolf edd297fb1c Fix iopadmap for cases where IO pins already have buffers on them 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-05-15 13:13:43 +02:00
Clifford Wolf 145c685de0 Add ABC FAQ to "help abc" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-05-04 21:59:31 +02:00
Clifford Wolf a572b49538 Replace -ignore_redef with -[no]overwrite 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-05-03 15:25:59 +02:00
Clifford Wolf 705c366a91 Added missing dont_use handling for SR FFs to dfflibmap 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-04-05 11:01:45 +02:00
Clifford Wolf a74f805ba0 Fix handling of src attributes in flatten 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-10 13:55:30 +01:00
Clifford Wolf 9ac560f5d3 Add "dffinit -highlow" and fix synth_intel 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-01-09 18:42:19 +01:00
Clifford Wolf a96c775a73 Add support for "yosys -E" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-01-07 16:36:13 +01:00
Staf Verhaegen 92eb841f0a Value of properties can be expression. 
Example found in the 2007.03 Liberty Reference Manual that was also found
in the wild:

    input_voltage(CMOS) {
        vil : 0.3 * VDD ;
        vih : 0.7 * VDD ;
        vimin : -0.5 ;
        vimax : VDD + 0.5 ;
    }

Current implementation just parses the expression but no interpretation is done.
 2018-01-03 21:37:17 +00:00
Clifford Wolf 7c57d8fbb4 Rewrite ABC output to include proper net names in timing report 2017-10-10 13:32:58 +02:00
Andrew Zonenberg 2b65b65d70 Added missing "break" 2017-09-15 17:54:52 -07:00
Andrew Zonenberg 7b3966714c Implemented off-chain support for extract_reduce 2017-09-15 13:59:18 -07:00
Andrew Zonenberg 3404934c9c extract_reduce now only removes the head of the chain, relying on "clean" to delete upstream cells. Added "-allow-off-chain" flag, but it's currently ignored. 2017-09-15 13:59:05 -07:00