S12 / MagniV Microcontrollers中的主题 Re: EMUL instruction cycle ?error?

EMUL instruction cycle ?error?

TSCeric — Sat, 18 Jul 2009 05:42:04 GMT

I have noticed that the instruction cycle count in the disassembly listing shows that the EMUL instruction uses one clock cycle, 0000 13 [1] EMUL, however the instruction matrix for the 9S12 says EMUL uses 3 clocks. Is there a file that CodeWarrior uses that can be corrected so that the listing will be correct? Or is it true that the EMUL instruction does such a fast multiply?\

Thanks

Re: EMUL instruction cycle ?error?

CompilerGuru — Sat, 18 Jul 2009 12:46:18 GMT

Which derivative are you using?

And how do you create the disassembly listing.

While S12's need (out of my memory) 3 cycles, S12X cores are faster and do only need a single cycle.

So could be that the disassembler is configured (or defaults to) an S12X.

Daniel