On Fri, Sep 28, 2012 at 10:58:22PM -0400, Peter Gavin wrote: > On Fri, Sep 28, 2012 at 10:53 PM, Stefan Kristiansson > <[email protected]> wrote: > > Yes, I agree, and you wouldn't loose much if the ISA would allow pushing > > out the > > full 64-bit result to a register pair.... > > Actually, that would be a problem. That would be the only instruction > writing a register pair, so you'd be paying the extra hardware cost > just for that one instruction. But it could be pushed out to the HI > and LO registers without any extra cost. >
Fair enough. Although I could imagine the floating point unit could be another user of the register pair writing mechanism, but I digress. Stefan _______________________________________________ OpenRISC mailing list [email protected] http://lists.openrisc.net/listinfo/openrisc
