• Newbie2019 (8/8) Sep 09 2019 I want to translate this c code into d (build with ldc), so I can
• a11e99z (2/10) Sep 10 2019 https://forum.dlang.org/post/ighiwexofvdqbuqeqbkp@forum.dlang.org
• Nicholas Wilson (3/11) Sep 10 2019 Easiest way is to use GFM's[1] 128bit integers.

Newbie2019 <newbie2019 gmail.com> writes:

I want to translate this c code into d (build with ldc), so I can 
use -flto and inline with other code.

uint64_t _wymum(uint64_t A, uint64_t B){
         __uint128_t r = A ;
         r *= B;
         return  (r>>64)^r;
}

Do i need ASM or is there a easy way to implement it ?

a11e99z <black80 bk.ru> writes:

On Tuesday, 10 September 2019 at 06:18:05 UTC, Newbie2019 wrote:
 I want to translate this c code into d (build with ldc), so I 
 can use -flto and inline with other code.

 uint64_t _wymum(uint64_t A, uint64_t B){
         __uint128_t r = A ;
         r *= B;
         return  (r>>64)^r;
 }

 Do i need ASM or is there a easy way to implement it ?

https://forum.dlang.org/post/ighiwexofvdqbuqeqbkp forum.dlang.org

Nicholas Wilson <iamthewilsonator hotmail.com> writes:

On Tuesday, 10 September 2019 at 06:18:05 UTC, Newbie2019 wrote:
 I want to translate this c code into d (build with ldc), so I 
 can use -flto and inline with other code.

 uint64_t _wymum(uint64_t A, uint64_t B){
         __uint128_t r = A ;
         r *= B;
         return  (r>>64)^r;
 }

 Do i need ASM or is there a easy way to implement it ?

Easiest way is to use GFM's[1] 128bit integers.

[1]:http://code.dlang.org/packages/gfm