Re: [Qemu-devel] [PATCH] memory: use signed arithmetic

[Richard Henderson]

On 08/02/2011 01:50 PM, Avi Kivity wrote:
>  struct AddrRange {
> -    uint64_t start;
> -    uint64_t size;
> +    int64_t start;
> +    int64_t size;

I'm must say I'm not keen on this.  My primary objection is that
a "range" can no longer properly represent the entire address space.
Or, indeed, anything in the second half of it.

It sounds like your problem would be better solved by re-arranging
things such that you perform X < Y comparisons rather than DELTA < 0.



r~