On Tue, 26 Mar 2013, Paulo Matos wrote: > > -----Original Message----- > > From: Hans-Peter Nilsson [mailto:h...@bitrange.com] > > Sent: 05 March 2013 01:45 > > To: Paulo Matos > > Cc: gcc@gcc.gnu.org > > Subject: Re: Modeling predicate registers with more than one bit > > > > Except for CCmodes being dependent on source-modes, I'd sneak > > peeks at PowerPC. > > > > What do you mean by source modes?
The SI and HI in subsi3 and subhi3. IIRC you said your ISA set CC-bits differently depending on the size of the operand. > I am not sure CC_MODE can solve the problem but I am not > entirely experienced with using different CC_MODEs, the first > thing that comes to mind is, how do you set the size of a > CCmode? Unfortunately undocumented, but UTSL, for example gcc/config/mips/mips-modes.def. If any register can be set to a "CC-value" then you don't need to set any specific set of registers aside. brgds, H-P
