Is there anyway to access LLVM's 128 bit int type for C from LDC?

Nicholas Wilson iamthewilsonator at hotmail.com
Fri Dec 15 02:08:12 UTC 2017


On Friday, 15 December 2017 at 01:17:17 UTC, Jack Stouffer wrote:
> On Thursday, 14 December 2017 at 23:33:34 UTC, Nicholas Wilson 
> wrote:
>> On Thursday, 14 December 2017 at 19:47:53 UTC, Jack Stouffer 
>> wrote:
>>> Clang has __int128. Is there anyway to use this with D with 
>>> LDC?
>>
>> Not really as a plain type, although there is effort to get 
>> [u]cent working. I could have sworn that mir was using 
>> InlineIR with it for multiplication. But InlineIR is the only 
>> way to get at it.
>>
>> What operation do you need on it?
>
> I'm looking to use it to store the coefficient in my precise 
> decimal type when you need more than 9 significant digits.
>
> I might just end up translating Boost's multiprecision lib to D 
> if ucent is impossible.

See also 
https://github.com/d-gamedev-team/gfm/tree/master/integers/gfm/integers


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