Since K7/K8 at least. See Agner Fog's microarchitecture manuals, or Anandtech's core/K8 comparison. You're probably thinking in terms of AMD's "macro-ops" whic

Since K7/K8 at least. See Agner Fog's microarchitecture manuals, or Anandtech's core/K8 comparison. You're probably thinking in terms of AMD's "macro-ops" which is basically the same thing as Intel's fused uops.