On 05/03/16 23:12, Bart wrote:
On 3/5/16, Jonas Maebe<jonas.ma...@elis.ugent.be> wrote:
>FPC 3.x has system.popcnt
Thanks.
I see it's a compilerproc.
How can I see how it'simplemented?
The "compilerproc" modifier does not influence code generation other
than symbol mangling. You can just look at the implementation in the
system unit like for any other routine.
It's however not just a compilerproc, but also an intrinsic. This means
that the compiler knows about this routine, and may substitute it with
more efficient code on some platforms. To know whether it does so in
your case with your particular compiler version and compiler settings,
you have to look at the generated assembler code.
Jonas
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