A trace control circuit includes a branch event generation circuit 1 having
an address abbreviation information generation circuit 8 for detecting a
portion in which a branch-source address and a branch-destination address
are overlapped with each other from the upper-bit side of the address data
thereof and generating branch-destination address abbreviation information
on the basis of the result of the detection, and a trace data abbreviation
circuit 5 for performing abbreviation of one part of trace data in
accordance with the branch-destination address abbreviation information
and outputting the partly abbreviated trace data, whereby the number of
data packets of the trace data can be reduced to speed up the output
operation of the trace data, and the ability to output trace data in real
time can be thereby improved greatly.
