(cgen-*.o): Add cgen-sim.h dependency. * sim-cpu.h: New file. sim_cpu_base moved here. Move sim_cpu_lookup decl here. * sim-base.h: #include "sim-cpu.h". * sim-cpu.c: New file. * Make-common (sim_main_headers): Add sim-cpu.h. (sim-cpu.o): Add rule for.