This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: Variable sized i386 string operations
On Thu, Jan 27, 2000 at 08:16:51PM +0100, Jan Hubicka wrote:
> Speedups for other pixel sizes are basically by avoiding function call
> overhead in library version ...
How big are these copies? I would imagine that function call
overhead is only visible in extremely sort copies -- 64 bytes
or less.
> Perhaps we can develop se customizability to this. (switch to enable
> full inline and switch to disable alignment handling for instance)
> and default to something like rep movsl + maximally two branches.
That doesn't sound unreasonable.
> Note that our strlen unroller falls into same problem with the code size.
Yes, I was just thinking that.
r~