Any usable SIMD implementation?

[Johannes Pfau via Digitalmars-d]

Am Thu, 07 Apr 2016 10:52:42 +0000
schrieb Kai Nacke <kai at redstar.de>:

> On Thursday, 7 April 2016 at 03:27:31 UTC, Walter Bright wrote:
> > Then,
> >
> >     void app(int simd)() { ... my fabulous app ... }
> >
> >     int main() {
> >       auto fpu = core.cpuid.getfpu();
> >       switch (fpu) {
> >         case SIMD: app!(SIMD)(); break;
> >         case SIMD4: app!(SIMD4)(); break;
> >         default: error("unsupported FPU"); exit(1);
> >       }
> >     }
> >  
> 
> glibc has a special mechanism for resolving the called function 
> during loading. See the section on the GNU Indirect Function 
> Mechanism here: 
> https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/W51a7ffcf4dfd_4b40_9d82_446ebc23c550/page/Optimized%20Libraries
> 
> Would be awesome to have something similar in druntime/Phobos.
> 
> Regards,
> Kai

Available in GCC as the 'ifunc' attribute:
https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#Common-Function-Attributes

What do you mean by 'something similar in druntime/phobos'? A platform
independent (slightly slower) variant?:

http://dpaste.dzfl.pl/0aa81325a26a