Hi Sicong, I believe the PTLsim manual [http://www.ptlsim.org/Documentation/PTLsimManual.pdf] answers your question. Please refer to sections 20.3.1 and 20.3.2.
Tyler > Hi, > I'm new to the this simulator and because my work involves modifying some > component behavior of the core, I'm reading the code of the simulation > part. I'd appreciate if anybody can help me out. > > I have a question regarding the Out-of-Order mis-prediction mechanism of > the simulator. It seems that the annulment procedure of an mis-prediction > appears twice in both the ReorderBufferEntry::issue() method > (ooo-exec.cpp: > 653) and ReorderBufferEntry::commit() method (ooo-pipe.cpp: 2094). > > I know that the ReorderBufferEntry::issue() method annuls all the uop in > the ROB after the mis-predicted uop and the macro-op which comprises the > mis-predicted uop itself except that the mis-predicted uop is the end of > its macro-op. While ReorderBufferEntry::commit() is supposed to handle it. > > But anyway in the ReorderBufferEntry::issue() the annulment is done once > for all the combination. Could anybody help me to understand why it is > done > again in the commit stage instead of simply "commit" the mis-predicted > uop? > > Thanks in advance > > Regards, > Sicong Zhuang > > Graduate Student > Department of Computer Architecture > Univsersitat Politècnica de Catalunya > _______________________________________________ > http://www.marss86.org > Marss86-Devel mailing list > [email protected] > https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel > _______________________________________________ http://www.marss86.org Marss86-Devel mailing list [email protected] https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel
