mirror of https://github.com/YosysHQ/yosys.git
902 lines
37 KiB
Plaintext
902 lines
37 KiB
Plaintext
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List of major changes and improvements between releases
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=======================================================
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Yosys 0.10 .. Yosys 0.10-dev
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--------------------------
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* Various
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- Added $aldff and $aldffe (flip-flops with async load) cells
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* SystemVerilog
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- Fixed an issue which prevented writing directly to a memory word via a
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connection to an output port
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- Fixed an issue which prevented unbased unsized literals (e.g., `'1`) from
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filling the width of a cell input
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- Fixed an issue where connecting a slice covering the entirety of a signed
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signal to a cell input would cause a failed assertion
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* Verific support
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- Importer support for {PRIM,WIDE_OPER}_DFF
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- Importer support for PRIM_BUFIF1
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- Option to use Verific without VHDL support
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- Importer support for {PRIM,WIDE_OPER}_DLATCH{,RS}
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Yosys 0.9 .. Yosys 0.10
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--------------------------
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* Various
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- Added automatic gzip decompression for frontends
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- Added $_NMUX_ cell type
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- Added automatic gzip compression (based on filename extension) for backends
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- Improve attribute and parameter encoding in JSON to avoid ambiguities between
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bit vectors and strings containing [01xz]*
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- Improvements in pmgen: subpattern and recursive matches
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- Support explicit FIRRTL properties
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- Improvements in pmgen: slices, choices, define, generate
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- Added "_TECHMAP_WIREINIT_*_" parameter and "_TECHMAP_REMOVEINIT_*_" wire for "techmap" pass
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- Added +/mul2dsp.v for decomposing wide multipliers to custom-sized ones
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- Added new frontend: rpc
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- Added --version and -version as aliases for -V
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- Improve yosys-smtbmc "solver not found" handling
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- Improved support of $readmem[hb] Memory Content File inclusion
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- Added CXXRTL backend
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- Use YosysHQ/abc instead of upstream berkeley-abc/abc
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- Added WASI platform support.
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- Added extmodule support to firrtl backend
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- Added $divfloor and $modfloor cells
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- Added $adffe, $dffsre, $sdff, $sdffe, $sdffce, $adlatch cells
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- Added "_TECHMAP_CELLNAME_" parameter for "techmap" pass
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- Added firrtl backend support for generic parameters in blackbox components
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- Added $meminit_v2 cells (with support for write mask)
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- Added $mem_v2, $memrd_v2, $memwr_v2, with the following features:
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- write priority masks, per write/write port pair
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- transparency and undefined collision behavior masks, per read/write port pair
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- read port reset and initialization
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- wide ports (accessing a naturally aligned power-of-two number of memory cells)
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* New commands and options
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- Added "write_xaiger" backend
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- Added "read_xaiger"
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- Added "abc9" pass for timing-aware techmapping (experimental, FPGA only)
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- Added "synth -abc9" (experimental)
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- Added "script -scriptwire"
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- Added "clkbufmap" pass
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- Added "extractinv" pass and "invertible_pin" attribute
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- Added "proc_clean -quiet"
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- Added "proc_prune" pass
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- Added "stat -tech cmos"
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- Added "opt_share" pass, run as part of "opt -full"
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- Added "-match-init" option to "dff2dffs" pass
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- Added "equiv_opt -multiclock"
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- Added "techmap_autopurge" support to techmap
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- Added "add -mod <modname[s]>"
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- Added "paramap" pass
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- Added "portlist" command
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- Added "check -mapped"
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- Added "check -allow-tbuf"
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- Added "autoname" pass
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- Added "write_verilog -extmem"
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- Added "opt_mem" pass
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- Added "scratchpad" pass
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- Added "fminit" pass
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- Added "opt_lut_ins" pass
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- Added "logger" pass
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- Added "show -nobg"
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- Added "exec" command
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- Added "design -delete"
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- Added "design -push-copy"
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- Added "qbfsat" command
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- Added "select -unset"
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- Added "dfflegalize" pass
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- Removed "opt_expr -clkinv" option, made it the default
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- Added "proc -nomux
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- Merged "dffsr2dff", "opt_rmdff", "dff2dffe", "dff2dffs", "peepopt.dffmux" passes into a new "opt_dff" pass
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* SystemVerilog
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- Added checking of always block types (always_comb, always_latch and always_ff)
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- Added support for wildcard port connections (.*)
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- Added support for enum typedefs
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- Added support for structs and packed unions.
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- Allow constant function calls in for loops and generate if and case
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- Added support for static cast
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- Added support for logic typed parameters
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- Fixed generate scoping issues
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- Added support for real-valued parameters
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- Allow localparams in constant functions
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- Module name scope support
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- Support recursive functions using ternary expressions
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- Extended support for integer types
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- Support for parameters without default values
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- Allow globals in one file to depend on globals in another
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- Added support for: *=, /=, %=, <<=, >>=, <<<=, >>>=
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- Added support for parsing the 'bind' construct
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- support declaration in procedural for initialization
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- support declaration in generate for initialization
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- Support wand and wor of data types
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* Verific support
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- Added "verific -L"
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- Add Verific SVA support for "always" properties
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- Add Verific support for SVA nexttime properties
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- Improve handling of verific primitives in "verific -import -V" mode
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- Import attributes for wires
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- Support VHDL enums
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- Added support for command files
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* New back-ends
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- Added initial EFINIX support
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- Added Intel ALM: alternative synthesis for Intel FPGAs
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- Added initial Nexus support
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- Added initial MachXO2 support
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- Added initial QuickLogic PolarPro 3 support
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* ECP5 support
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- Renamed labels/options in synth_ecp5 (e.g. dram -> map_lutram; -nodram -> -nolutram)
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- Added "synth_ecp5 -abc9" (experimental)
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- Added "synth_ecp5 -nowidelut"
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- "synth_ecp5" to now infer DSP blocks (-nodsp to disable, experimental)
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* iCE40 support
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- Added "synth_ice40 -abc9" (experimental)
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- Added "synth_ice40 -device"
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- Renamed labels/options in synth_ice40 (e.g. dram -> map_lutram; -nodram -> -nolutram)
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- Added "ice40_wrapcarry" to encapsulate SB_LUT+SB_CARRY pairs for techmapping
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- Removed "ice40_unlut"
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- Added "ice40_dsp" for Lattice iCE40 DSP packing
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- "synth_ice40 -dsp" to infer DSP blocks
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* Xilinx support
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- Added "synth_xilinx -abc9" (experimental)
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- Added "synth_xilinx -nocarry"
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- Added "synth_xilinx -nowidelut"
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- "synth_xilinx" to now infer wide multiplexers (-widemux <min> to enable)
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- Renamed labels/options in synth_xilinx (e.g. dram -> map_lutram; -nodram -> -nolutram)
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- Added "synth_xilinx -family xc6s" for Spartan 6 support (experimental)
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- Added "synth_xilinx -ise" (experimental)
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- Added "synth_xilinx -iopad"
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- "synth_xilinx" now automatically inserts clock buffers (add -noclkbuf to disable)
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- Added "xilinx_srl" for Xilinx shift register extraction
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- Removed "shregmap -tech xilinx" (superseded by "xilinx_srl")
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- Added "xilinx_dsp" for Xilinx DSP packing
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- "synth_xilinx" to now infer DSP blocks (-nodsp to disable)
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- Added latch support to synth_xilinx
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- Added support for flip-flops with synchronous reset to synth_xilinx
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- Added support for flip-flops with reset and enable to synth_xilinx
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- Added "xilinx_dffopt" pass
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- Added "synth_xilinx -dff"
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* Intel support
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- Renamed labels in synth_intel (e.g. bram -> map_bram)
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- synth_intel: cyclone10 -> cyclone10lp, a10gx -> arria10gx
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- Added "intel_alm -abc9" (experimental)
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* CoolRunner2 support
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- Separate and improve buffer cell insertion pass
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- Use extract_counter to optimize counters
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Yosys 0.8 .. Yosys 0.9
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----------------------
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* Various
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- Many bugfixes and small improvements
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- Added support for SystemVerilog interfaces and modports
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- Added "write_edif -attrprop"
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- Added "opt_lut" pass
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- Added "gate2lut.v" techmap rule
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- Added "rename -src"
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- Added "equiv_opt" pass
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- Added "flowmap" LUT mapping pass
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- Added "rename -wire" to rename cells based on the wires they drive
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- Added "bugpoint" for creating minimised testcases
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- Added "write_edif -gndvccy"
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- "write_verilog" to escape Verilog keywords
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- Fixed sign handling of real constants
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- "write_verilog" to write initial statement for initial flop state
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- Added pmgen pattern matcher generator
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- Fixed opt_rmdff handling of $_DFFSR_???_ and $_DLATCHSR_???_
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- Added "setundef -params" to replace undefined cell parameters
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- Renamed "yosys -D" to "yosys -U", added "yosys -D" to set Verilog defines
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- Fixed handling of defparam when default_nettype is none
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- Fixed "wreduce" flipflop handling
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- Fixed FIRRTL to Verilog process instance subfield assignment
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- Added "write_verilog -siminit"
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- Several fixes and improvements for mem2reg memories
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- Fixed handling of task output ports in clocked always blocks
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- Improved handling of and-with-1 and or-with-0 in "opt_expr"
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- Added "read_aiger" frontend
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- Added "mutate" pass
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- Added "hdlname" attribute
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- Added "rename -output"
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- Added "read_ilang -lib"
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- Improved "proc" full_case detection and handling
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- Added "whitebox" and "lib_whitebox" attributes
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- Added "read_verilog -nowb", "flatten -wb" and "wbflip"
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- Added Python bindings and support for Python plug-ins
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- Added "pmux2shiftx"
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- Added log_debug framework for reduced default verbosity
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- Improved "opt_expr" and "opt_clean" handling of (partially) undriven and/or unused wires
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- Added "peepopt" peephole optimisation pass using pmgen
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- Added approximate support for SystemVerilog "var" keyword
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- Added parsing of "specify" blocks into $specrule and $specify[23]
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- Added support for attributes on parameters and localparams
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- Added support for parsing attributes on port connections
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- Added "wreduce -keepdc"
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- Added support for optimising $dffe and $_DFFE_* cells in "opt_rmdff"
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- Added Verilog wand/wor wire type support
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- Added support for elaboration system tasks
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- Added "muxcover -mux{4,8,16}=<cost>"
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- Added "muxcover -dmux=<cost>"
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- Added "muxcover -nopartial"
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- Added "muxpack" pass
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- Added "pmux2shiftx -norange"
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- Added support for "~" in filename parsing
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- Added "read_verilog -pwires" feature to turn parameters into wires
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- Fixed sign extension of unsized constants with 'bx and 'bz MSB
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- Fixed genvar to be a signed type
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- Added support for attributes on case rules
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- Added "upto" and "offset" to JSON frontend and backend
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- Several liberty file parser improvements
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- Fixed handling of more complex BRAM patterns
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- Add "write_aiger -I -O -B"
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* Formal Verification
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- Added $changed support to read_verilog
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- Added "read_verilog -noassert -noassume -assert-assumes"
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- Added btor ops for $mul, $div, $mod and $concat
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- Added yosys-smtbmc support for btor witnesses
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- Added "supercover" pass
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- Fixed $global_clock handling vs autowire
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- Added $dffsr support to "async2sync"
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- Added "fmcombine" pass
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- Added memory init support in "write_btor"
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- Added "cutpoint" pass
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- Changed "ne" to "neq" in btor2 output
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- Added support for SVA "final" keyword
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- Added "fmcombine -initeq -anyeq"
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- Added timescale and generated-by header to yosys-smtbmc vcd output
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- Improved BTOR2 handling of undriven wires
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* Verific support
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- Enabled Verific flags vhdl_support_variable_slice and veri_elaborate_top_level_modules_having_interface_ports
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- Improved support for asymmetric memories
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- Added "verific -chparam"
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- Fixed "verific -extnets" for more complex situations
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- Added "read -verific" and "read -noverific"
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- Added "hierarchy -chparam"
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* New back-ends
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- Added initial Anlogic support
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- Added initial SmartFusion2 and IGLOO2 support
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* ECP5 support
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- Added "synth_ecp5 -nowidelut"
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- Added BRAM inference support to "synth_ecp5"
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- Added support for transforming Diamond IO and flipflop primitives
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* iCE40 support
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- Added "ice40_unlut" pass
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- Added "synth_ice40 -relut"
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- Added "synth_ice40 -noabc"
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- Added "synth_ice40 -dffe_min_ce_use"
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- Added DSP inference support using pmgen
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- Added support for initialising BRAM primitives from a file
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- Added iCE40 Ultra RGB LED driver cells
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* Xilinx support
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- Use "write_edif -pvector bra" for Xilinx EDIF files
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- Fixes for VPR place and route support with "synth_xilinx"
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- Added more cell simulation models
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- Added "synth_xilinx -family"
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- Added "stat -tech xilinx" to estimate logic cell usage
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- Added "synth_xilinx -nocarry"
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- Added "synth_xilinx -nowidelut"
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- "synth_xilinx" to now infer hard shift registers (-nosrl to disable)
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- Added support for mapping RAM32X1D
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Yosys 0.7 .. Yosys 0.8
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----------------------
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* Various
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- Many bugfixes and small improvements
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- Strip debug symbols from installed binary
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- Replace -ignore_redef with -[no]overwrite in front-ends
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- Added write_verilog hex dump support, add -nohex option
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- Added "write_verilog -decimal"
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- Added "scc -set_attr"
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- Added "verilog_defines" command
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- Remember defines from one read_verilog to next
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- Added support for hierarchical defparam
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- Added FIRRTL back-end
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- Improved ABC default scripts
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- Added "design -reset-vlog"
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- Added "yosys -W regex", "yosys -w regex", and "yosys -e regex"
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- Added Verilog $rtoi and $itor support
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- Added "check -initdrv"
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- Added "read_blif -wideports"
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- Added support for SystemVerilog "++" and "--" operators
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- Added support for SystemVerilog unique, unique0, and priority case
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- Added "write_edif" options for edif "flavors"
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- Added support for resetall compiler directive
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- Added simple C beck-end (bitwise combinatorical only atm)
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- Added $_ANDNOT_ and $_ORNOT_ cell types
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- Added cell library aliases to "abc -g"
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- Added "setundef -anyseq"
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- Added "chtype" command
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- Added "design -import"
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- Added "write_table" command
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- Added "read_json" command
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- Added "sim" command
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- Added "extract_fa" and "extract_reduce" commands
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- Added "extract_counter" command
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- Added "opt_demorgan" command
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- Added support for $size and $bits SystemVerilog functions
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- Added "blackbox" command
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- Added "ltp" command
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- Added support for editline as replacement for readline
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- Added warnings for driver-driver conflicts between FFs (and other cells) and constants
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- Added "yosys -E" for creating Makefile dependencies files
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- Added "synth -noshare"
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- Added "memory_nordff"
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- Added "setundef -undef -expose -anyconst"
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- Added "expose -input"
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- Added specify/specparam parser support (simply ignore them)
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- Added "write_blif -inames -iattr"
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- Added "hierarchy -simcheck"
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- Added an option to statically link abc into yosys
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- Added protobuf back-end
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- Added BLIF parsing support for .conn and .cname
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- Added read_verilog error checking for reg/wire/logic misuse
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- Added "make coverage" and ENABLE_GCOV build option
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* Changes in Yosys APIs
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- Added ConstEval defaultval feature
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- Added {get,set}_src_attribute() methods on RTLIL::AttrObject
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- Added SigSpec::is_fully_ones() and Const::is_fully_ones()
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- Added log_file_warning() and log_file_error() functions
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* Formal Verification
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- Added "write_aiger"
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- Added "yosys-smtbmc --aig"
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- Added "always <positive_int>" to .smtc format
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- Added $cover cell type and support for cover properties
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- Added $fair/$live cell type and support for liveness properties
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- Added smtbmc support for memory vcd dumping
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- Added "chformal" command
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- Added "write_smt2 -stbv" and "write_smt2 -stdt"
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- Fix equiv_simple, old behavior now available with "equiv_simple -short"
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- Change to Yices2 as default SMT solver (it is GPL now)
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- Added "yosys-smtbmc --presat" (now default in SymbiYosys)
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- Added "yosys-smtbmc --smtc-init --smtc-top --noinit"
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- Added a brand new "write_btor" command for BTOR2
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- Added clk2fflogic memory support and other improvements
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- Added "async memory write" support to write_smt2
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- Simulate clock toggling in yosys-smtbmc VCD output
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- Added $allseq/$allconst cells for EA-solving
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- Make -nordff the default in "prep"
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- Added (* gclk *) attribute
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- Added "async2sync" pass for single-clock designs with async resets
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* Verific support
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- Many improvements in Verific front-end
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- Added proper handling of concurent SVA properties
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- Map "const" and "rand const" to $anyseq/$anyconst
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- Added "verific -import -flatten" and "verific -import -extnets"
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- Added "verific -vlog-incdir -vlog-define -vlog-libdir"
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- Remove PSL support (because PSL has been removed in upstream Verific)
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- Improve integration with "hierarchy" command design elaboration
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- Added YOSYS_NOVERIFIC for running non-verific test cases with verific bin
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- Added simpilied "read" command that automatically uses verific if available
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- Added "verific -set-<severity> <msg_id>.."
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- Added "verific -work <libname>"
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* New back-ends
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- Added initial Coolrunner-II support
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- Added initial eASIC support
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- Added initial ECP5 support
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* GreenPAK Support
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- Added support for GP_DLATCH, GP_SPI, GP_DCMx, GP_COUNTx, etc.
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* iCE40 Support
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- Add "synth_ice40 -vpr"
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- Add "synth_ice40 -nodffe"
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- Add "synth_ice40 -json"
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- Add Support for UltraPlus cells
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* MAX10 and Cyclone IV Support
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- Added initial version of metacommand "synth_intel".
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- Improved write_verilog command to produce VQM netlist for Quartus Prime.
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- Added support for MAX10 FPGA family synthesis.
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- Added support for Cyclone IV family synthesis.
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- Added example of implementation for DE2i-150 board.
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- Added example of implementation for MAX10 development kit.
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- Added LFSR example from Asic World.
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- Added "dffinit -highlow" for mapping to Intel primitives
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Yosys 0.6 .. Yosys 0.7
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----------------------
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* Various
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- Added "yosys -D" feature
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- Added support for installed plugins in $(DATDIR)/plugins/
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- Renamed opt_const to opt_expr
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- Renamed opt_share to opt_merge
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- Added "prep -flatten" and "synth -flatten"
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- Added "prep -auto-top" and "synth -auto-top"
|
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- Using "mfs" and "lutpack" in ABC lut mapping
|
|
- Support for abstract modules in chparam
|
|
- Cleanup abstract modules at end of "hierarchy -top"
|
|
- Added tristate buffer support to iopadmap
|
|
- Added opt_expr support for div/mod by power-of-two
|
|
- Added "select -assert-min <N> -assert-max <N>"
|
|
- Added "attrmvcp" pass
|
|
- Added "attrmap" command
|
|
- Added "tee +INT -INT"
|
|
- Added "zinit" pass
|
|
- Added "setparam -type"
|
|
- Added "shregmap" pass
|
|
- Added "setundef -init"
|
|
- Added "nlutmap -assert"
|
|
- Added $sop cell type and "abc -sop -I <num> -P <num>"
|
|
- Added "dc2" to default ABC scripts
|
|
- Added "deminout"
|
|
- Added "insbuf" command
|
|
- Added "prep -nomem"
|
|
- Added "opt_rmdff -keepdc"
|
|
- Added "prep -nokeepdc"
|
|
- Added initial version of "synth_gowin"
|
|
- Added "fsm_expand -full"
|
|
- Added support for fsm_encoding="user"
|
|
- Many improvements in GreenPAK4 support
|
|
- Added black box modules for all Xilinx 7-series lib cells
|
|
- Added synth_ice40 support for latches via logic loops
|
|
- Fixed ice40_opt lut unmapping, added "ice40_opt -unlut"
|
|
|
|
* Build System
|
|
- Added ABCEXTERNAL and ABCURL make variables
|
|
- Added BINDIR, LIBDIR, and DATDIR make variables
|
|
- Added PKG_CONFIG make variable
|
|
- Added SEED make variable (for "make test")
|
|
- Added YOSYS_VER_STR make variable
|
|
- Updated min GCC requirement to GCC 4.8
|
|
- Updated required Bison version to Bison 3.x
|
|
|
|
* Internal APIs
|
|
- Added ast.h to exported headers
|
|
- Added ScriptPass helper class for script-like passes
|
|
- Added CellEdgesDatabase API
|
|
|
|
* Front-ends and Back-ends
|
|
- Added filename glob support to all front-ends
|
|
- Added avail (black-box) module params to ilang format
|
|
- Added $display %m support
|
|
- Added support for $stop Verilog system task
|
|
- Added support for SystemVerilog packages
|
|
- Fixed procedural assignments to non-unique lvalues, e.g. {y,y} = {a,b}
|
|
- Added support for "active high" and "active low" latches in read_blif and write_blif
|
|
- Use init value "2" for all uninitialized FFs in BLIF back-end
|
|
- Added "read_blif -sop"
|
|
- Added "write_blif -noalias"
|
|
- Added various write_blif options for VTR support
|
|
- write_json: also write module attributes.
|
|
- Added "write_verilog -nodec -nostr -defparam"
|
|
- Added "read_verilog -norestrict -assume-asserts"
|
|
- Added support for bus interfaces to "read_liberty -lib"
|
|
- Added liberty parser support for types within cell decls
|
|
- Added "write_verilog -renameprefix -v"
|
|
- Added "write_edif -nogndvcc"
|
|
|
|
* Formal Verification
|
|
- Support for hierarchical designs in smt2 back-end
|
|
- Yosys-smtbmc: Support for hierarchical VCD dumping
|
|
- Added $initstate cell type and vlog function
|
|
- Added $anyconst and $anyseq cell types and vlog functions
|
|
- Added printing of code loc of failed asserts to yosys-smtbmc
|
|
- Added memory_memx pass, "memory -memx", and "prep -memx"
|
|
- Added "proc_mux -ifx"
|
|
- Added "yosys-smtbmc -g"
|
|
- Deprecated "write_smt2 -regs" (by default on now)
|
|
- Made "write_smt2 -bv -mem" default, added "write_smt2 -nobv -nomem"
|
|
- Added support for memories to smtio.py
|
|
- Added "yosys-smtbmc --dump-vlogtb"
|
|
- Added "yosys-smtbmc --smtc --dump-smtc"
|
|
- Added "yosys-smtbmc --dump-all"
|
|
- Added assertpmux command
|
|
- Added "yosys-smtbmc --unroll"
|
|
- Added $past, $stable, $rose, $fell SVA functions
|
|
- Added "yosys-smtbmc --noinfo and --dummy"
|
|
- Added "yosys-smtbmc --noincr"
|
|
- Added "yosys-smtbmc --cex <filename>"
|
|
- Added $ff and $_FF_ cell types
|
|
- Added $global_clock verilog syntax support for creating $ff cells
|
|
- Added clk2fflogic
|
|
|
|
|
|
Yosys 0.5 .. Yosys 0.6
|
|
----------------------
|
|
|
|
* Various
|
|
- Added Contributor Covenant Code of Conduct
|
|
- Various improvements in dict<> and pool<>
|
|
- Added hashlib::mfp and refactored SigMap
|
|
- Improved support for reals as module parameters
|
|
- Various improvements in SMT2 back-end
|
|
- Added "keep_hierarchy" attribute
|
|
- Verilog front-end: define `BLACKBOX in -lib mode
|
|
- Added API for converting internal cells to AIGs
|
|
- Added ENABLE_LIBYOSYS Makefile option
|
|
- Removed "techmap -share_map" (use "-map +/filename" instead)
|
|
- Switched all Python scripts to Python 3
|
|
- Added support for $display()/$write() and $finish() to Verilog front-end
|
|
- Added "yosys-smtbmc" formal verification flow
|
|
- Added options for clang sanitizers to Makefile
|
|
|
|
* New commands and options
|
|
- Added "scc -expect <N> -nofeedback"
|
|
- Added "proc_dlatch"
|
|
- Added "check"
|
|
- Added "select %xe %cie %coe %M %C %R"
|
|
- Added "sat -dump_json" (WaveJSON format)
|
|
- Added "sat -tempinduct-baseonly -tempinduct-inductonly"
|
|
- Added "sat -stepsize" and "sat -tempinduct-step"
|
|
- Added "sat -show-regs -show-public -show-all"
|
|
- Added "write_json" (Native Yosys JSON format)
|
|
- Added "write_blif -attr"
|
|
- Added "dffinit"
|
|
- Added "chparam"
|
|
- Added "muxcover"
|
|
- Added "pmuxtree"
|
|
- Added memory_bram "make_outreg" feature
|
|
- Added "splice -wires"
|
|
- Added "dff2dffe -direct-match"
|
|
- Added simplemap $lut support
|
|
- Added "read_blif"
|
|
- Added "opt_share -share_all"
|
|
- Added "aigmap"
|
|
- Added "write_smt2 -mem -regs -wires"
|
|
- Added "memory -nordff"
|
|
- Added "write_smv"
|
|
- Added "synth -nordff -noalumacc"
|
|
- Added "rename -top new_name"
|
|
- Added "opt_const -clkinv"
|
|
- Added "synth -nofsm"
|
|
- Added "miter -assert"
|
|
- Added "read_verilog -noautowire"
|
|
- Added "read_verilog -nodpi"
|
|
- Added "tribuf"
|
|
- Added "lut2mux"
|
|
- Added "nlutmap"
|
|
- Added "qwp"
|
|
- Added "test_cell -noeval"
|
|
- Added "edgetypes"
|
|
- Added "equiv_struct"
|
|
- Added "equiv_purge"
|
|
- Added "equiv_mark"
|
|
- Added "equiv_add -try -cell"
|
|
- Added "singleton"
|
|
- Added "abc -g -luts"
|
|
- Added "torder"
|
|
- Added "write_blif -cname"
|
|
- Added "submod -copy"
|
|
- Added "dffsr2dff"
|
|
- Added "stat -liberty"
|
|
|
|
* Synthesis metacommands
|
|
- Various improvements in synth_xilinx
|
|
- Added synth_ice40 and synth_greenpak4
|
|
- Added "prep" metacommand for "synthesis lite"
|
|
|
|
* Cell library changes
|
|
- Added cell types to "help" system
|
|
- Added $meminit cell type
|
|
- Added $assume cell type
|
|
- Added $_MUX4_, $_MUX8_, and $_MUX16_ cells
|
|
- Added $tribuf and $_TBUF_ cell types
|
|
- Added read-enable to memory model
|
|
|
|
* YosysJS
|
|
- Various improvements in emscripten build
|
|
- Added alternative webworker-based JS API
|
|
- Added a few example applications
|
|
|
|
|
|
Yosys 0.4 .. Yosys 0.5
|
|
----------------------
|
|
|
|
* API changes
|
|
- Added log_warning()
|
|
- Added eval_select_args() and eval_select_op()
|
|
- Added cell->known(), cell->input(portname), cell->output(portname)
|
|
- Skip blackbox modules in design->selected_modules()
|
|
- Replaced std::map<> and std::set<> with dict<> and pool<>
|
|
- New SigSpec::extend() is what used to be SigSpec::extend_u0()
|
|
- Added YS_OVERRIDE, YS_FINAL, YS_ATTRIBUTE, YS_NORETURN
|
|
|
|
* Cell library changes
|
|
- Added flip-flops with enable ($dffe etc.)
|
|
- Added $equiv cells for equivalence checking framework
|
|
|
|
* Various
|
|
- Updated ABC to hg rev 61ad5f908c03
|
|
- Added clock domain partitioning to ABC pass
|
|
- Improved plugin building (see "yosys-config --build")
|
|
- Added ENABLE_NDEBUG Makefile flag for high-performance builds
|
|
- Added "yosys -d", "yosys -L" and other driver improvements
|
|
- Added support for multi-bit (array) cell ports to "write_edif"
|
|
- Now printing most output to stdout, not stderr
|
|
- Added "onehot" attribute (set by "fsm_map")
|
|
- Various performance improvements
|
|
- Vastly improved Xilinx flow
|
|
- Added "make unsintall"
|
|
|
|
* Equivalence checking
|
|
- Added equivalence checking commands:
|
|
equiv_make equiv_simple equiv_status
|
|
equiv_induct equiv_miter
|
|
equiv_add equiv_remove
|
|
|
|
* Block RAM support:
|
|
- Added "memory_bram" command
|
|
- Added BRAM support to Xilinx flow
|
|
|
|
* Other New Commands and Options
|
|
- Added "dff2dffe"
|
|
- Added "fsm -encfile"
|
|
- Added "dfflibmap -prepare"
|
|
- Added "write_blid -unbuf -undef -blackbox"
|
|
- Added "write_smt2" for writing SMT-LIBv2 files
|
|
- Added "test_cell -w -muxdiv"
|
|
- Added "select -read"
|
|
|
|
|
|
Yosys 0.3.0 .. Yosys 0.4
|
|
------------------------
|
|
|
|
* Platform Support
|
|
- Added support for mxe-based cross-builds for win32
|
|
- Added sourcecode-export as VisualStudio project
|
|
- Added experimental EMCC (JavaScript) support
|
|
|
|
* Verilog Frontend
|
|
- Added -sv option for SystemVerilog (and automatic *.sv file support)
|
|
- Added support for real-valued constants and constant expressions
|
|
- Added support for non-standard "via_celltype" attribute on task/func
|
|
- Added support for non-standard "module mod_name(...);" syntax
|
|
- Added support for non-standard """ macro bodies
|
|
- Added support for array with more than one dimension
|
|
- Added support for $readmemh and $readmemb
|
|
- Added support for DPI functions
|
|
|
|
* Changes in internal cell library
|
|
- Added $shift and $shiftx cell types
|
|
- Added $alu, $lcu, $fa and $macc cell types
|
|
- Removed $bu0 and $safe_pmux cell types
|
|
- $mem/$memwr WR_EN input is now a per-data-bit enable signal
|
|
- Added $_NAND_ $_NOR_ $_XNOR_ $_AOI3_ $_OAI3_ $_AOI4_ $_OAI4_
|
|
- Renamed ports of $lut cells (from I->O to A->Y)
|
|
- Renamed $_INV_ to $_NOT_
|
|
|
|
* Changes for simple synthesis flows
|
|
- There is now a "synth" command with a recommended default script
|
|
- Many improvements in synthesis of arithmetic functions to gates
|
|
- Multipliers and adders with many operands are using carry-save adder trees
|
|
- Remaining adders are now implemented using Brent-Kung carry look-ahead adders
|
|
- Various new high-level optimizations on RTL netlist
|
|
- Various improvements in FSM optimization
|
|
- Updated ABC to hg 5b5af75f1dda (from 2014-11-07)
|
|
|
|
* Changes in internal APIs and RTLIL
|
|
- Added log_id() and log_cell() helper functions
|
|
- Added function-like cell creation helpers
|
|
- Added GetSize() function (like .size() but with int)
|
|
- Major refactoring of RTLIL::Module and related classes
|
|
- Major refactoring of RTLIL::SigSpec and related classes
|
|
- Now RTLIL::IdString is essentially an int
|
|
- Added macros for code coverage counters
|
|
- Added some Makefile magic for pretty make logs
|
|
- Added "kernel/yosys.h" with all the core definitions
|
|
- Changed a lot of code from FILE* to c++ streams
|
|
- Added RTLIL::Monitor API and "trace" command
|
|
- Added "Yosys" C++ namespace
|
|
|
|
* Changes relevant to SAT solving
|
|
- Added ezSAT::keep_cnf() and ezSAT::non_incremental()
|
|
- Added native ezSAT support for vector shift ops
|
|
- Updated MiniSAT to git 37dc6c67e2 (from 2013-09-25)
|
|
|
|
* New commands (or large improvements to commands)
|
|
- Added "synth" command with default script
|
|
- Added "share" (finally some real resource sharing)
|
|
- Added "memory_share" (reduce number of ports on memories)
|
|
- Added "wreduce" and "alumacc" commands
|
|
- Added "opt -keepdc -fine -full -fast"
|
|
- Added some "test_*" commands
|
|
|
|
* Various other changes
|
|
- Added %D and %c select operators
|
|
- Added support for labels in yosys scripts
|
|
- Added support for here-documents in yosys scripts
|
|
- Support "+/" prefix for files from proc_share_dir
|
|
- Added "autoidx" statement to ilang language
|
|
- Switched from "yosys-svgviewer" to "xdot"
|
|
- Renamed "stdcells.v" to "techmap.v"
|
|
- Various bug fixes and small improvements
|
|
- Improved welcome and bye messages
|
|
|
|
|
|
Yosys 0.2.0 .. Yosys 0.3.0
|
|
--------------------------
|
|
|
|
* Driver program and overall behavior:
|
|
- Added "design -push" and "design -pop"
|
|
- Added "tee" command for redirecting log output
|
|
|
|
* Changes in the internal cell library:
|
|
- Added $dlatchsr and $_DLATCHSR_???_ cell types
|
|
|
|
* Improvements in Verilog frontend:
|
|
- Improved support for const functions (case, always, repeat)
|
|
- The generate..endgenerate keywords are now optional
|
|
- Added support for arrays of module instances
|
|
- Added support for "`default_nettype" directive
|
|
- Added support for "`line" directive
|
|
|
|
* Other front- and back-ends:
|
|
- Various changes to "write_blif" options
|
|
- Various improvements in EDIF backend
|
|
- Added "vhdl2verilog" pseudo-front-end
|
|
- Added "verific" pseudo-front-end
|
|
|
|
* Improvements in technology mapping:
|
|
- Added support for recursive techmap
|
|
- Added CONSTMSK and CONSTVAL features to techmap
|
|
- Added _TECHMAP_CONNMAP_*_ feature to techmap
|
|
- Added _TECHMAP_REPLACE_ feature to techmap
|
|
- Added "connwrappers" command for wrap-extract-unwrap method
|
|
- Added "extract -map %<design_name>" feature
|
|
- Added "extract -ignore_param ..." and "extract -ignore_parameters"
|
|
- Added "techmap -max_iter" option
|
|
|
|
* Improvements to "eval" and "sat" framework:
|
|
- Now include a copy of Minisat (with build fixes applied)
|
|
- Switched to Minisat::SimpSolver as SAT back-end
|
|
- Added "sat -dump_vcd" feature
|
|
- Added "sat -dump_cnf" feature
|
|
- Added "sat -initsteps <N>" feature
|
|
- Added "freduce -stop <N>" feature
|
|
- Added "freduce -dump <prefix>" feature
|
|
|
|
* Integration with ABC:
|
|
- Updated ABC rev to 7600ffb9340c
|
|
|
|
* Improvements in the internal APIs:
|
|
- Added RTLIL::Module::add... helper methods
|
|
- Various build fixes for OSX (Darwin) and OpenBSD
|
|
|
|
|
|
Yosys 0.1.0 .. Yosys 0.2.0
|
|
--------------------------
|
|
|
|
* Changes to the driver program:
|
|
- Added "yosys -h" and "yosys -H"
|
|
- Added support for backslash line continuation in scripts
|
|
- Added support for #-comments in same line as command
|
|
- Added "echo" and "log" commands
|
|
|
|
* Improvements in Verilog frontend:
|
|
- Added support for local registers in named blocks
|
|
- Added support for "case" in "generate" blocks
|
|
- Added support for $clog2 system function
|
|
- Added support for basic SystemVerilog assert statements
|
|
- Added preprocessor support for macro arguments
|
|
- Added preprocessor support for `elsif statement
|
|
- Added "verilog_defaults" command
|
|
- Added read_verilog -icells option
|
|
- Added support for constant sizes from parameters
|
|
- Added "read_verilog -setattr"
|
|
- Added support for function returning 'integer'
|
|
- Added limited support for function calls in parameter values
|
|
- Added "read_verilog -defer" to suppress evaluation of modules with default parameters
|
|
|
|
* Other front- and back-ends:
|
|
- Added BTOR backend
|
|
- Added Liberty frontend
|
|
|
|
* Improvements in technology mapping:
|
|
- The "dfflibmap" command now strongly prefers solutions with
|
|
no inverters in clock paths
|
|
- The "dfflibmap" command now prefers cells with smaller area
|
|
- Added support for multiple -map options to techmap
|
|
- Added "dfflibmap" support for //-comments in liberty files
|
|
- Added "memory_unpack" command to revert "memory_collect"
|
|
- Added standard techmap rule "techmap -share_map pmux2mux.v"
|
|
- Added "iopadmap -bits"
|
|
- Added "setundef" command
|
|
- Added "hilomap" command
|
|
|
|
* Changes in the internal cell library:
|
|
- Major rewrite of simlib.v for better compatibility with other tools
|
|
- Added PRIORITY parameter to $memwr cells
|
|
- Added TRANSPARENT parameter to $memrd cells
|
|
- Added RD_TRANSPARENT parameter to $mem cells
|
|
- Added $bu0 cell (always 0-extend, even undef MSB)
|
|
- Added $assert cell type
|
|
- Added $slice and $concat cell types
|
|
|
|
* Integration with ABC:
|
|
- Updated ABC to hg rev 2058c8ccea68
|
|
- Tighter integration of ABC build with Yosys build. The make
|
|
targets 'make abc' and 'make install-abc' are now obsolete.
|
|
- Added support for passing FFs from one clock domain through ABC
|
|
- Now always use BLIF as exchange format with ABC
|
|
- Added support for "abc -script +<command_sequence>"
|
|
- Improved standard ABC recipe
|
|
- Added support for "keep" attribute to abc command
|
|
- Added "abc -dff / -clk / -keepff" options
|
|
|
|
* Improvements to "eval" and "sat" framework:
|
|
- Added support for "0" and "~0" in right-hand side -set expressions
|
|
- Added "eval -set-undef" and "eval -table"
|
|
- Added "sat -set-init" and "sat -set-init-*" for sequential problems
|
|
- Added undef support to SAT solver, incl. various new "sat" options
|
|
- Added correct support for === and !== for "eval" and "sat"
|
|
- Added "sat -tempinduct" (default -seq is now non-induction sequential)
|
|
- Added "sat -prove-asserts"
|
|
- Complete rewrite of the 'freduce' command
|
|
- Added "miter" command
|
|
- Added "sat -show-inputs" and "sat -show-outputs"
|
|
- Added "sat -ignore_unknown_cells" (now produce an error by default)
|
|
- Added "sat -falsify"
|
|
- Now "sat -verify" and "sat -falsify" can also be used without "-prove"
|
|
- Added "expose" command
|
|
- Added support for @<sel_name> to sat and eval signal expressions
|
|
|
|
* Changes in the 'make test' framework and auxiliary test tools:
|
|
- Added autotest.sh -p and -f options
|
|
- Replaced autotest.sh ISIM support with XSIM support
|
|
- Added test cases for SAT framework
|
|
|
|
* Added "abbreviated IDs":
|
|
- Now $<something>$foo can be abbreviated as $foo.
|
|
- Usually this last part is a unique id (from RTLIL::autoidx)
|
|
- This abbreviated IDs are now also used in "show" output
|
|
|
|
* Other changes to selection framework:
|
|
- Now */ is optional in */<mode>:<arg> expressions
|
|
- Added "select -assert-none" and "select -assert-any"
|
|
- Added support for matching modules by attribute (A:<expr>)
|
|
- Added "select -none"
|
|
- Added support for r:<expr> pattern for matching cell parameters
|
|
- Added support for !=, <, <=, >=, > for attribute and parameter matching
|
|
- Added support for %s for selecting sub-modules
|
|
- Added support for %m for expanding selections to whole modules
|
|
- Added support for i:*, o:* and x:* pattern for selecting module ports
|
|
- Added support for s:<expr> pattern for matching wire width
|
|
- Added support for %a operation to select wire aliases
|
|
|
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* Various other changes to commands and options:
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- The "ls" command now supports wildcards
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- Added "show -pause" and "show -format dot"
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- Added "show -color" support for cells
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- Added "show -label" and "show -notitle"
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- Added "dump -m" and "dump -n"
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- Added "history" command
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- Added "rename -hide"
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- Added "connect" command
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- Added "splitnets -driver"
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- Added "opt_const -mux_undef"
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- Added "opt_const -mux_bool"
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- Added "opt_const -undriven"
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- Added "opt -mux_undef -mux_bool -undriven -purge"
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- Added "hierarchy -libdir"
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- Added "hierarchy -purge_lib" (by default now do not remove lib cells)
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- Added "delete" command
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- Added "dump -append"
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- Added "setattr" and "setparam" commands
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- Added "design -stash/-copy-from/-copy-to"
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- Added "copy" command
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- Added "splice" command
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