Re: !!!Please add intrinsics module for DMD DRuntime!!!

[Walter Bright via Digitalmars-d]

On 11/22/2016 9:07 AM, Ilya Yaroshenko wrote:

No, LDC and GDC cannot detect it. Proof - https://godbolt.org/g/bsAFU8 . Current
LDC DRuntime uses intrinsics instead of software implementation.

Consider the code:

  import core.bitop;

  int foo(int v) {
    return core.bitop.bsf(v);
  }

Compiling:

  dmd foo.d -c
  obj2asm foo.obj

yields:

  _D5bug113fooFiZi        comdat
                bsf     EAX,AL
                ret

Meaning the bsf() intrinsic is properly detected and used.