This issue is to keep track of the information on the PIPs around the PCIE_2_1 primitives for xc7 parts.

Description

The PCIE_2_1 primitive is a hard block that is half-clock region tall and has many connections with the fabric. By investigating the device view, it results that there are some pips in the PCIE_INT_INTERFACE tiles which work a bit like the BOUNCE pips in the INT tiles.

The image above represents a section of the PCIE_INT_INTERFACE that displays said pips.

By further investigation, these pips seem to occupy the 27th frame of the segment in which the PCIE_2_1 primitive is, and that, by default, the pip allows a direct connection, without bouncing to the additional wire before getting to the destination port.

These PIPs should likely require a pce-int-pips fuzzer.