Merge tag 'yosys-0.9'

CHANGELOG

@@ -13,6 +13,10 @@ Yosys 0.9 .. Yosys 0.9-dev
     - 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 hard shift registers (-nosrl to disable)
     - "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)
@@ -29,32 +33,124 @@ Yosys 0.9 .. Yosys 0.9-dev
     - Removed "ice40_unlut"
     - Improvements in pmgen: slices, choices, define, generate
 
-Yosys 0.8 .. Yosys 0.8-dev
---------------------------
+Yosys 0.8 .. Yosys 0.9
+----------------------
 
  * Various
-    - Added $changed support to read_verilog
+    - Many bugfixes and small improvements
+    - Added support for SystemVerilog interfaces and modports
     - Added "write_edif -attrprop"
-    - Added "ice40_unlut" pass
     - Added "opt_lut" pass
-    - Added "synth_ice40 -relut"
-    - Added "synth_ice40 -noabc"
     - Added "gate2lut.v" techmap rule
     - Added "rename -src"
     - Added "equiv_opt" pass
-    - Added "shregmap -tech xilinx"
+    - 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"
-    - Added "synth_ecp5 -nowidelut"
     - "synth_xilinx" to now infer hard shift registers (-nosrl to disable)
-    - Fixed sign extension of unsized constants with 'bx and 'bz MSB
-
+    - Added support for mapping RAM32X1D
 
 Yosys 0.7 .. Yosys 0.8
 ----------------------