Re: [Qemu-devel] Add ARM920T to ARM emulation

[Tristan Gingold]

On Jun 1, 2009, at 3:29 PM, Avi Kivity wrote:

> Paul Brook wrote:
> > B is a direct branch that never changes mode. BX is an indirect  
> > branch that mode switches based on the low address bit.
> > BL and BLX(register) are exactly the same as B/BX except they also  
> > set LR.
> > BLX(immediate) is a direct mode switching call.
> > loads into the PC either ignore(v4t) or mode switch (v5) on the low  
> > address bit.
> > ALU writes to the PC always ignore the low bit in Thumb mode. In  
> > ARM mode the low bit is either ignored(v6) or used to mode switch  
> > (v7).
> >
> > BX was introduced in v4t, BLX was introduced in v5.
>
> Does no sane instruction set exist?

What is wrong with Alpha (or to a lesser extent PowerPc) ? & ;-)