>>> On 10.03.15 at 20:48, <andrew.coop...@citrix.com> wrote:
> Did you observe any code changes simply from changing = constraints to
> +, or did we get very lucky in with the generated code?

I think it's not really unexpected that there was no change, since
the operands were all memory-only ones (and generally gcc avoids
to address the same memory location in multiple different ways).

> I think it might be a very wise idea to switch to using symbolic names. 
> This code is very complicated and has many ways to go subtly wrong.

Let's save this for another day.

Jan



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