Yeah, my vague sense of low-level stuff these days is that it's moved a lot more towards memory/bus bound, and branch-prediction dependent. Anything that's in

Yeah, my vague sense of low-level stuff these days is that it's moved a lot more towards memory/bus bound, and branch-prediction dependent. Anything that's in a register already and doesn't branch is about the same cost (probably technically extremely wrong, but that's my rule of thumb).