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Diffstat (limited to 'CHANGELOG')
| -rw-r--r-- | CHANGELOG | 270 |
1 files changed, 269 insertions, 1 deletions
@@ -3,9 +3,276 @@ List of major changes and improvements between releases ======================================================= -Yosys 0.7 .. Yosys ??? +Yosys 0.9 .. Yosys 0.9-dev +-------------------------- + + * Various + - Added "write_xaiger" backend + - Added "abc9" pass for timing-aware techmapping (experimental, FPGA only, no FFs) + - Added "synth_xilinx -abc9" (experimental) + - Added "synth_ice40 -abc9" (experimental) + - Added "synth -abc9" (experimental) + - Added "script -scriptwire" + - Added "synth_xilinx -nocarry" + - Added "synth_xilinx -nowidelut" + - Added "synth_ecp5 -nowidelut" + - "synth_xilinx" to now infer wide multiplexers (-widemux <min> to enable) + - Renamed labels/options in synth_ice40 (e.g. dram -> map_lutram; -nodram -> -nolutram) + - Renamed labels/options in synth_ecp5 (e.g. dram -> map_lutram; -nodram -> -nolutram) + - Renamed labels in synth_intel (e.g. bram -> map_bram) + - Renamed labels/options in synth_xilinx (e.g. dram -> map_lutram; -nodram -> -nolutram) + - Added automatic gzip decompression for frontends + - Added $_NMUX_ cell type + - Added automatic gzip compression (based on filename extension) for backends + - Improve attribute and parameter encoding in JSON to avoid ambiguities between + bit vectors and strings containing [01xz]* + - Added "clkbufmap" pass + - Added "extractinv" pass and "invertible_pin" attribute + - Added "synth_xilinx -family xc6s" for Spartan 6 support (experimental) + - Added "synth_xilinx -ise" (experimental) + - Added "synth_xilinx -iopad" + - "synth_xilinx" now automatically inserts clock buffers (add -noclkbuf to disable) + - Improvements in pmgen: subpattern and recursive matches + - Added "opt_share" pass, run as part of "opt -full" + - Added "ice40_wrapcarry" to encapsulate SB_LUT+SB_CARRY pairs for techmapping + - Removed "ice40_unlut" + - Improvements in pmgen: slices, choices, define, generate + - Added "xilinx_srl" for Xilinx shift register extraction + - Removed "shregmap -tech xilinx" (superseded by "xilinx_srl") + - Added "_TECHMAP_WIREINIT_*_" attribute and "_TECHMAP_REMOVEINIT_*_" wire for "techmap" pass + - Added "-match-init" option to "dff2dffs" pass + - Added "techmap_autopurge" support to techmap + - Added "add -mod <modname[s]>" + +Yosys 0.8 .. Yosys 0.9 +---------------------- + + * Various + - Many bugfixes and small improvements + - Added support for SystemVerilog interfaces and modports + - Added "write_edif -attrprop" + - Added "opt_lut" pass + - Added "gate2lut.v" techmap rule + - Added "rename -src" + - Added "equiv_opt" pass + - Added "flowmap" LUT mapping pass + - Added "rename -wire" to rename cells based on the wires they drive + - Added "bugpoint" for creating minimised testcases + - Added "write_edif -gndvccy" + - "write_verilog" to escape Verilog keywords + - Fixed sign handling of real constants + - "write_verilog" to write initial statement for initial flop state + - Added pmgen pattern matcher generator + - Fixed opt_rmdff handling of $_DFFSR_???_ and $_DLATCHSR_???_ + - Added "setundef -params" to replace undefined cell parameters + - Renamed "yosys -D" to "yosys -U", added "yosys -D" to set Verilog defines + - Fixed handling of defparam when default_nettype is none + - Fixed "wreduce" flipflop handling + - Fixed FIRRTL to Verilog process instance subfield assignment + - Added "write_verilog -siminit" + - Several fixes and improvements for mem2reg memories + - Fixed handling of task output ports in clocked always blocks + - Improved handling of and-with-1 and or-with-0 in "opt_expr" + - Added "read_aiger" frontend + - Added "mutate" pass + - Added "hdlname" attribute + - Added "rename -output" + - Added "read_ilang -lib" + - Improved "proc" full_case detection and handling + - Added "whitebox" and "lib_whitebox" attributes + - Added "read_verilog -nowb", "flatten -wb" and "wbflip" + - Added Python bindings and support for Python plug-ins + - Added "pmux2shiftx" + - Added log_debug framework for reduced default verbosity + - Improved "opt_expr" and "opt_clean" handling of (partially) undriven and/or unused wires + - Added "peepopt" peephole optimisation pass using pmgen + - Added approximate support for SystemVerilog "var" keyword + - Added parsing of "specify" blocks into $specrule and $specify[23] + - Added support for attributes on parameters and localparams + - Added support for parsing attributes on port connections + - Added "wreduce -keepdc" + - Added support for optimising $dffe and $_DFFE_* cells in "opt_rmdff" + - Added Verilog wand/wor wire type support + - Added support for elaboration system tasks + - Added "muxcover -mux{4,8,16}=<cost>" + - Added "muxcover -dmux=<cost>" + - Added "muxcover -nopartial" + - Added "muxpack" pass + - Added "pmux2shiftx -norange" + - Added support for "~" in filename parsing + - Added "read_verilog -pwires" feature to turn parameters into wires + - Fixed sign extension of unsized constants with 'bx and 'bz MSB + - Fixed genvar to be a signed type + - Added support for attributes on case rules + - Added "upto" and "offset" to JSON frontend and backend + - Several liberty file parser improvements + - Fixed handling of more complex BRAM patterns + - Add "write_aiger -I -O -B" + + * Formal Verification + - Added $changed support to read_verilog + - Added "read_verilog -noassert -noassume -assert-assumes" + - Added btor ops for $mul, $div, $mod and $concat + - Added yosys-smtbmc support for btor witnesses + - Added "supercover" pass + - Fixed $global_clock handling vs autowire + - Added $dffsr support to "async2sync" + - Added "fmcombine" pass + - Added memory init support in "write_btor" + - Added "cutpoint" pass + - Changed "ne" to "neq" in btor2 output + - Added support for SVA "final" keyword + - Added "fmcombine -initeq -anyeq" + - Added timescale and generated-by header to yosys-smtbmc vcd output + - Improved BTOR2 handling of undriven wires + + * Verific support + - Enabled Verific flags vhdl_support_variable_slice and veri_elaborate_top_level_modules_having_interface_ports + - Improved support for asymmetric memories + - Added "verific -chparam" + - Fixed "verific -extnets" for more complex situations + - Added "read -verific" and "read -noverific" + - Added "hierarchy -chparam" + + * New back-ends + - Added initial Anlogic support + - Added initial SmartFusion2 and IGLOO2 support + + * ECP5 support + - Added "synth_ecp5 -nowidelut" + - Added BRAM inference support to "synth_ecp5" + - Added support for transforming Diamond IO and flipflop primitives + + * iCE40 support + - Added "ice40_unlut" pass + - Added "synth_ice40 -relut" + - Added "synth_ice40 -noabc" + - Added "synth_ice40 -dffe_min_ce_use" + - Added DSP inference support using pmgen + - Added support for initialising BRAM primitives from a file + - Added iCE40 Ultra RGB LED driver cells + + * Xilinx support + - Use "write_edif -pvector bra" for Xilinx EDIF files + - Fixes for VPR place and route support with "synth_xilinx" + - Added more cell simulation models + - Added "synth_xilinx -family" + - Added "stat -tech xilinx" to estimate logic cell usage + - Added "synth_xilinx -nocarry" + - Added "synth_xilinx -nowidelut" + - "synth_xilinx" to now infer hard shift registers (-nosrl to disable) + - Added support for mapping RAM32X1D + +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 + - Remember 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-<severity> <msg_id>.." + - Added "verific -work <libname>" + + * 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. @@ -14,6 +281,7 @@ Yosys 0.7 .. Yosys ??? - 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 Yosys 0.6 .. Yosys 0.7 |