On 24 Aug 2014 16:26, "ketmar via Digitalmars-d-announce" < digitalmars-d-announce@puremagic.com> wrote: > > On Sun, 24 Aug 2014 16:16:43 +0100 > Iain Buclaw via Digitalmars-d-announce > <digitalmars-d-announce@puremagic.com> wrote: > > > That's because floor isn't an intrinsic. The crippling speed issue > > was the fact that floor computed and returned at real precision. > i'm testing on x86, and the difference between 'call floorf' and > inlining is significant. gcc inlines floorf() call, and gdc does not. >
Inline is not quite correct. Floor is a function recognised by the compiler, so if the backend knows an instruction for it, it will favour that intrinsic over calling an external function. Iain
