What does the Allegrex "ins" instruction does?

[kenaku]

Has the tittle says, i been trying to figure something for while, looking how the game calculates an offset but has soon this "ins" instruction is used in the value a have no idea what it did.

[Cyneprepou4uk]

http://lukasz.dk/mirror/forums.ps2dev.org/viewtopicb3d1-2.html?t=9403

[[Unknown]]

It may also help to look at PPSSPP's interpreter for things like this:
https://github.com/hrydgard/ppsspp/blob/bb38cf842bdf25519d187961be81e547bc0ee23f/Core/MIPS/MIPSInt.cpp#L835

But basically it just replaces ("inserts") the specified bits.

-[Unknown]

[kenaku]

Thank you for your answers, i am now able to calculate the offsets correctly. All it was doing was change 6 bits from the right to 0. But could not they just put the real offsets?