Hi, I'd like to ask what should be the calling convention/ABI for these routines on platforms with hardware floating point support (but somehow still want to generate a libcall for whatever reasons).
In particular, it seems that on all the platforms with a arm*-*-gnueabihf triple I've checked (alarm armv7h, alarm armv6h, debian armhf, fedora armv7hl) the __powidf2 function (and possibly many others) are compiled with the AAPCS VFP calling convention, which is also how it is used by gcc. However, LLVM dev (CC'd) claims that these routines are meant to be always using soft floating point calling convention even on platforms using hard floating point ABI. A breif google search doesn't show document supporting either so what exactly should be used? Is it documented anywhere or what's the default rule to decide the calling conventions for these functions? In either case I think it's be nice if the document is a little more explicit about this. Yichao Yu
