AR# 5810: 1.5i Map - A case has been seen where -pr b option drops an inversion between flop and BUFT.
AR# 5810
1.5i Map - A case has been seen where -pr b option drops an inversion between flop and BUFT.
Description
Keywords: MAP, -pr b, BUFT
Urgency: standard
General Description: If a Virtex design has a flip flop connected to an inverter and the output of the inverter enables a BUFT, the design is mapped with the correct logic. When the -pr b option is used to push the flop into the IOB, the inveris lost, corrupting the logic.