[cfe-dev] [LLVMdev] ARM EABI and modulo

[Joerg Sonnenberger]

On Mon, Dec 09, 2013 at 03:11:45PM +0100, Joerg Sonnenberger wrote:
> On Mon, Dec 09, 2013 at 01:58:29PM +0000, Renato Golin wrote:
> > I can see the error, and it's just a bad selection of choices. I was
> > wrong in assuming that the "eabi" at the end would always force it:
> > 
> > $ clang -target arm-elf-eabi -S mod.c -o - | grep mod
> > .file "mod.c"
> > bl __modsi3
> > bl __umodsi3
> 
> I was discussing this with Tim on IRC and he raised the valid question
> of a pure mod operation being faster when emulated as it doesn't have to
> keep track of the quotient. So it really boils down to whether it has a
> fancy enough dress to be called a feature.

...but it should be using __aeabi_*mod in that case.

Joerg