[aarch64-port-dev ] Optimize pushes and pops

[Andrew Haley]

On 05/12/2014 08:18 PM, Edward Nevill wrote:
> On Mon, 2014-05-12 at 19:42 +0100, Andrew Haley wrote:
>> On 05/12/2014 05:33 PM, Andrew Haley wrote:
>>   0x00007fffd10d2030: ldp	x1, x2, [sp]
>>   0x00007fffd10d2034: ldp	x3, x4, [sp,#16]
>>   0x00007fffd10d2038: ldp	x5, x6, [sp,#32]
>>   0x00007fffd10d203c: add	sp, sp, #0x30
>>
>> Andrew.
>>
> 
> What about
> 
>  ldp x3, x4, [sp, #16]
>  ldp x5, x6, [sp, #32]
>  ldp x1, x2, [sp], #48
> 
> Is this better or worse?

Looks better.  I don't know if it'll be any faster, but it is shorter.

> Do we need to keep a count of words_pushed? This must == count at the end.

OK, ta.

Andrew.