2. Support
  3. 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.

Solution

This problem has been corrected for version 2.1i.
AR# 5810
Date 04/25/2000
Status Archive
Type General Article