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Yosys 0.8
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@cliffordwolf cliffordwolf released this 16 Oct 14:23
yosys-0.8
5706e90

Yosys 0.7 .. Yosys 0.8

  • Various

    • Many bugfixes and small improvements
    • Strip debug symbols from installed binary
    • Replace -ignore_redef with -[no]overwrite in front-ends
    • Added write_verilog hex dump support, add -nohex option
    • Added "write_verilog -decimal"
    • Added "scc -set_attr"
    • Added "verilog_defines" command
    • Remeber defines from one read_verilog to next
    • Added support for hierarchical defparam
    • Added FIRRTL back-end
    • Improved ABC default scripts
    • Added "design -reset-vlog"
    • Added "yosys -W regex", "yosys -w regex", and "yosys -e regex"
    • Added Verilog $rtoi and $itor support
    • Added "check -initdrv"
    • Added "read_blif -wideports"
    • Added support for systemVerilog "++" and "--" operators
    • Added support for SystemVerilog unique, unique0, and priority case
    • Added "write_edif" options for edif "flavors"
    • Added support for resetall compiler directive
    • Added simple C beck-end (bitwise combinatorical only atm)
    • Added $ANDNOT and $ORNOT cell types
    • Added cell library aliases to "abc -g"
    • Added "setundef -anyseq"
    • Added "chtype" command
    • Added "design -import"
    • Added "write_table" command
    • Added "read_json" command
    • Added "sim" command
    • Added "extract_fa" and "extract_reduce" commands
    • Added "extract_counter" command
    • Added "opt_demorgan" command
    • Added support for $size and $bits SystemVerilog functions
    • Added "blackbox" command
    • Added "ltp" command
    • Added support for editline as replacement for readline
    • Added warnings for driver-driver conflicts between FFs (and other cells) and constants
    • Added "yosys -E" for creating Makefile dependencies files
    • Added "synth -noshare"
    • Added "memory_nordff"
    • Added "setundef -undef -expose -anyconst"
    • Added "expose -input"
    • Added specify/specparam parser support (simply ignore them)
    • Added "write_blif -inames -iattr"
    • Added "hierarchy -simcheck"
    • Added an option to statically link abc into yosys
    • Added protobuf back-end
    • Added BLIF parsing support for .conn and .cname
    • Added read_verilog error checking for reg/wire/logic misuse
    • Added "make coverage" and ENABLE_GCOV build option

  • Changes in Yosys APIs

    • Added ConstEval defaultval feature
    • Added {get,set}_src_attribute() methods on RTLIL::AttrObject
    • Added SigSpec::is_fully_ones() and Const::is_fully_ones()
    • Added log_file_warning() and log_file_error() functions

  • Formal Verification

    • Added "write_aiger"
    • Added "yosys-smtbmc --aig"
    • Added "always <positive_int>" to .smtc format
    • Added $cover cell type and support for cover properties
    • Added $fair/$live cell type and support for liveness properties
    • Added smtbmc support for memory vcd dumping
    • Added "chformal" command
    • Added "write_smt2 -stbv" and "write_smt2 -stdt"
    • Fix equiv_simple, old behavior now available with "equiv_simple -short"
    • Change to Yices2 as default SMT solver (it is GPL now)
    • Added "yosys-smtbmc --presat" (now default in SymbiYosys)
    • Added "yosys-smtbmc --smtc-init --smtc-top --noinit"
    • Added a brand new "write_btor" command for BTOR2
    • Added clk2fflogic memory support and other improvements
    • Added "async memory write" support to write_smt2
    • Simulate clock toggling in yosys-smtbmc VCD output
    • Added $allseq/$allconst cells for EA-solving
    • Make -nordff the default in "prep"
    • Added (* gclk *) attribute
    • Added "async2sync" pass for single-clock designs with async resets

  • Verific support

    • Many improvements in Verific front-end
    • Added proper handling of concurent SVA properties
    • Map "const" and "rand const" to $anyseq/$anyconst
    • Added "verific -import -flatten" and "verific -import -extnets"
    • Added "verific -vlog-incdir -vlog-define -vlog-libdir"
    • Remove PSL support (because PSL has been removed in upstream Verific)
    • Improve integration with "hierarchy" command design elaboration
    • Added YOSYS_NOVERIFIC for running non-verific test cases with verific bin
    • Added simpilied "read" command that automatically uses verific if available
    • Added "verific -set- <msg_id>.."
    • Added "verific -work "

  • New back-ends

    • Added initial Coolrunner-II support
    • Added initial eASIC support
    • Added initial ECP5 support

  • GreenPAK Support

    • Added support for GP_DLATCH, GP_SPI, GP_DCMx, GP_COUNTx, etc.

  • iCE40 Support

    • Add "synth_ice40 -vpr"
    • Add "synth_ice40 -nodffe"
    • Add "synth_ice40 -json"
    • Add Support for UltraPlus cells

  • MAX10 and Cyclone IV Support

    • Added initial version of metacommand "synth_intel".
    • Improved write_verilog command to produce VQM netlist for Quartus Prime.
    • Added support for MAX10 FPGA family synthesis.
    • Added support for Cyclone IV family synthesis.
    • Added example of implementation for DE2i-150 board.
    • Added example of implementation for MAX10 development kit.
    • Added LFSR example from Asic World.
    • Added "dffinit -highlow" for mapping to Intel primitives
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