I doubt the Pentium 4 had no barrel shifter, as its shift instructions have single-cycle latency. It does seem, however, that the Prescott can do rotate instru

I doubt the Pentium 4 had no barrel shifter, as its shift instructions have single-cycle latency. It does seem, however, that the Prescott can do rotate instructions in one cycle while the Northwood took 4 (thanks, Mubench!).