Re: [Qemu-devel] qemu-arm: wrong execution of post-indexed loads when Rm and Rd are the same register

[Paul Brook]

On Thursday 15 March 2007 19:35, Lauro Ramos Venancio wrote:
> Qemu-arm is wrongly executing post-indexed loads when Rm and Rd are
> the same register. For example:
>
> ldr r0, [r1], +r0
>
> Current behavior:
> r0 <- [r1]
> r1 <- r1 + r0
>
> Expected behavior:
> addr <- r1
> r1 <- r1 + r0
> r0 <- [addr]

This is still wrong. The writeback must happen after the load. Your 
implementation will give incorrect results if the load faults.

Paul