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prjxray/minitests/clb-muxf8
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Tomasz Michalak 159d6a8e88 Add licensing header to Makefiles 
Signed-off-by: Tomasz Michalak <tmichalak@antmicro.com>
Signed-off-by: Tim 'mithro' Ansell <tansell@google.com>
 		2020-05-26 07:33:12 -07:00
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.gitignore minitest: clean up folders 2019-01-07 23:31:44 +01:00
Makefile Add licensing header to Makefiles 2020-05-26 07:33:12 -07:00
README.md MAKE - Format Trailing Whitespace 2019-10-26 10:04:52 +01:00
top.v minitest: clean up folders 2019-01-07 23:31:44 +01:00

README.md

CLB_MUXF8 Minitest

Purpose

This tests an issue related to Vivado 2017.2 vs 2017.3 changing MUXF8 behavior The general issue is the LUT6_2 cannot be used with a MUXF8 (even if O5 is unused)

General notes:

  • 2017.2: LUT6_2 works with MUXF8
  • 2017.3: LUT6_2 does not work with MUXF8
  • All: LUT6 works with MUXF8
  • All: MUXF8 (even with MUXF7) can be instantiated unconnected
  • 2017.4 seems to behave like 2017.3