Re: Design a microcontroller for gcc

[Hans-Peter Nilsson <hp@bitrange.com>]

On Wed, 15 Feb 2006, DJ Delorie wrote:
> I hope I can stick with my cmp/jmp model and manage them myself still,
> though, because there's a LOT of patterns in m32c where the set of
> flags affected depends on which alternative you select, and most
> patterns affect the flags in some (usually nonorthagonal) way.

Unless I'm delirious (it's way past bedtime) I see a m32c port
and it's cc0-free.  Is there a problem?

> Or is gcc going to start putting things between the cmp and jmp?

Yes.  At least reload wants to do that.  The choice a port has
is to either have cc-free reload insns (like i386) or keep the
cc setter and user combined at least until after reload
(cbranch, but you don't have to use the cbranchM4 name; you can
do the combination to a cbranch-type insn in the CC user).
Not my idea, so it's probably sane. :-)

brgds, H-P
PS. There may be other choices, but none that caught my attention.