Merge remote-tracking branch 'origin/clifford/pmgen' into eddie/xilinx_srl

diff --cc CHANGELOG
index 92456df99b610a1155ecd3cce76e3ae032849df1,dd94c76ed1818df87e0a0de323a0e7219838620a..b4b3005d454e1916e2e8bf270ad9f8618b52c266
--- 1/CHANGELOG
--- 2/CHANGELOG
+++ b/CHANGELOG
@@@ -27,8 -27,7 +27,9 @@@ Yosys 0.9 .. Yosys 0.9-de
      - 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"
  
  Yosys 0.8 .. Yosys 0.8-dev
  --------------------------