Im replying this cause i made a mistake asking to someones private mail, sorry: > OK, another question. How come if Cortex-M3 doesnt support DSP instructions > qemu understand them? I tried some of them with an stellaris lm3s6965evb. I > do understand that they were implemented for the A profile cores, but not > for M ones. Is this a bug or im missing something?
If our cortex-m3 model doesn't fault on an instruction that's not implemented in the M3 then that's a bug, yes. If you provide more detail we can fix it. 2015-05-05 9:52 GMT-03:00 aurelio remonda <aurelioremo...@gmail.com>: > Hi, i would like to to add support for cortex-m4 on qemu. Most features of > the Cortex-M3 and M4 are the same with the significant difference that > Cortex-M4 has DSP extensions and optional FPU. Even so, i really need some > pointers for this (im a newbie on qemu devel). I found out that qemu can > manage dsp instructions such as ADD16, ASX, SAX, etc. and all their > combinations with suffixes (u, s, sh, etc.), so half (if not all) of the > work is done. > > How should I go about this? What's the standard procedure for adding a new > CPU, even if it's so similar to the existing ones? That is, which are the > relevant functions/files that I should modify, and so on. > > Thanks a lot! >
