- Added "_TECHMAP_WIREINIT_*_" attribute and "_TECHMAP_REMOVEINIT_*_" wire for "techmap" pass
- Added "-match-init" option to "dff2dffs" pass
- Added +/mul2dsp.v for decomposing wide multipliers to custom-sized ones
+ - Added "ice40_dsp" for Lattice iCE40 DSP packing
- Added "xilinx_dsp" for Xilinx DSP packing
- "synth_xilinx" to now infer DSP blocks (-nodsp to disable)
- "synth_ecp5" to now infer DSP blocks (-nodsp to disable, experimental)