> The basic idea is that we add a new RTL optimization pass (or two) that
> assesses the usage of pseudo registers, and makes recommendations about
> what register class each should end up in, if there's a choice. These
> recommendations would then be used by later passes to get a better use
> of N
On 2 March 2012 12:29, Andrew Stubbs wrote:
> Hi All,
>
> As you know, the compiler currently has difficulties choosing between
> whether to do an operation in NEON or not.
>
I have put this on the agenda for Tuesday's call - There is a bit of
detail here that I haven't digested fully which is wh
Hi All,
As you know, the compiler currently has difficulties choosing between
whether to do an operation in NEON or not.
As I see it there are three problems:
1. Simply, is it profitable?
NEON can do many DImode operations in one or two instructions
where 2 to 10 normal ARM/Thumb
