Mixin in Inline Assembly

[Basile B. via Digitalmars-d-learn]

On Wednesday, 11 January 2017 at 00:11:50 UTC, Chris M wrote:
> On Tuesday, 10 January 2017 at 13:13:17 UTC, Basile B. wrote:
>> On Tuesday, 10 January 2017 at 11:38:43 UTC, Guillaume Piolat 
>> wrote:
>>> On Tuesday, 10 January 2017 at 10:41:54 UTC, Basile B. wrote:
>>>>
>>>> don't forget to flag
>>>>
>>>> asm pure nothrow {}
>>>>
>>>> otherwise it's slow.
>>>
>>> Why?
>>
>> It's an empirical observation. In september I tried to get why 
>> an inline asm function was slow. What happened was that I 
>> didn't mark the asm block as nothrow
>>
>> https://forum.dlang.org/post/xznocpxtalpayvkrwxey@forum.dlang.org
>>
>> I opened an issue asking the specifications to explain that 
>> clearly.
>
> Huh, that's really interesting, thanks for posting. I guess my 
> other question would be how do I determine if a block of 
> assembly is pure?
>

The game changer for the performances is just "nothrow".