Xilinx Synthesis Technology User Guide

Quiet Mode
Timing Report
Log File Analysis
By specifying the -quiet switch at the command line, you can limit the
number of messages that are printed to stdout (computer screen).
Normally, XST will print the entire log to stdout. In quiet mode, XST
will not print the following portions of the log to stdout:
• Copyright Message
• Table Of Contents
• Synthesis Options Summary
• The following portions of the Final Report
♦ Final Results header for CPLDs
♦ Final Results section for FPGAs
♦ The following note in the Timing Report
NOTE: THESE TIMING NUMBERS ARE ONLY A
SYNTHESIS ESTIMATE. FOR ACCURATE TIMING
INFORMATION PLEASE REFER TO THE TRACE
REPORT GENERATED AFTER PLACE-AND-ROUTE.
♦ Timing Detail
♦ CPU (XST run time)
♦ Memory usage
Note Device Utilization Summary, Clock Information, and
Timing Summary, will still be available for FPGAs.
At the end of the synthesis, XST reports the timing information for
the design. The report shows the information for all four possible
domains of a netlist: "register to register", "input to register", "register
to outpad" and "inpad to outpad".
See the TIMING REPORT section of the example given in the “FPGA
Log File” section for an example of timing report sections in the XST
log.
XST User Guide 9-3