On Thu, Oct 15, 2015 at 11:24 AM, Paul Gilmartin < 00000014e0e4a59b-dmarc-requ...@listserv.uga.edu> wrote:
> On 2015-10-15, at 09:26, John McKown wrote: > > > > Going beyond that, I have often wanted a "execute next instruction on > > condition". I.e. check the CC value, like a branch does, if the condition > > is TRUE, then execute the next instruction, otherwise skip it. ... > > > Data General NOVA. The CC was not saved in the PSW, but every RR > instruction contained a CC mask governing skipping the next instruction. > Plus one flag bit suppressing loading the destination register when > the programmer intended only to test CC. Any RR instruction with > Don't Store, Never Skip could be used as a no-op. > I got the idea after reading up on the ARM architecture. Many tablets, smartphones, and other gizmos use ARM. I think this usage is based on RISC research. > > -- gil > -- Schrodinger's backup: The condition of any backup is unknown until a restore is attempted. Yoda of Borg, we are. Futile, resistance is, yes. Assimilated, you will be. He's about as useful as a wax frying pan. 10 to the 12th power microphones = 1 Megaphone Maranatha! <>< John McKown
