AR# 47285

描述

In Spartan-6, when a BUFG has some BUFGMUX loads, the clock is reported as a local. 

Is this report correct?

WARNING:ParHelpers:79 -
The following Clock signals are not routed on the dedicated
global clock routing resources. This will usually result in
longer delays and higher skew for the clock load pins. This could
be the result of incorrect clock placement, more than 8 clocks
feeding logic in a single quadrant of the device, or incorrect
logic partitioning into the quadrant(s). Check the timing report
to verify the delay and skew for this net
Net Name: pllclk50m_out

+---------------------+--------------+------+------+------------+-------------+
| Clock Net | Resource |Locked|Fanout|Net Skew(ns)|Max Delay(ns)|
+---------------------+--------------+------+------+------------+-------------+
| clk_selout | BUFGMUX_X3Y13| No | 2 | 0.000 | 1.664 |
+---------------------+--------------+------+------+------------+-------------+
| pllclk100m_out | BUFGMUX_X2Y1| No | 1 | 0.000 | 1.083 |
+---------------------+--------------+------+------+------------+-------------+
| pllclk50m_out | Local| | 2 | 0.000 | 1.084 |
+---------------------+--------------+------+------+------------+-------------+

解决方案