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prjxray/minitests/clb_muxf8
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John McMaster 696d88db88 clb_muxf8 minitest 
Signed-off-by: John McMaster <johndmcmaster@gmail.com>
 		2017-12-22 15:37:21 -08:00
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.gitignore clb_muxf8 minitest 2017-12-22 15:37:21 -08:00
Makefile clb_muxf8 minitest 2017-12-22 15:37:21 -08:00
README.txt clb_muxf8 minitest 2017-12-22 15:37:21 -08:00
top.v clb_muxf8 minitest 2017-12-22 15:37:21 -08:00

README.txt 

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