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p4040 memory barrier related query.

Question asked by Vasanth Sri on Jul 3, 2014
Latest reply on Jul 7, 2014 by Vasanth Sri

Dear All,


We have few packs of application source code written in PowerPC set in which an instruction eieio is heavily used. In this new core (e500mc), the eieio instruction opcode executes as mbar. Could someone help us with below queries.


1. Any additional overhead on executing mbar instead eieio?

2. Any easy way to set?replace this instruction with M0=1 ? Unfortunately, we don"t have HID bit as like we had in previous e500vx cores


Changing the asm code will be heavy task as there are many number of lines which needs to be replaced such.