* Make-common.in (cgen-utils.o): Depend on cgen-engine.h.

	* Make-common.in (cgen-utils.o): Depend on cgen-engine.h.
	(CGEN_ARCH_SCM): New variable.
	* cgen-engine.h (EXTRACT_[ML]SB0_{INT,UINT}): New macros.
	(EXTRACT_INT,EXTRACT_UINT): New macros.
	(SEM_SEM_ARG): New macro.
	(SEM_NEXT_VPC): New arg `pc'.
	* cgen-sim.h (EXTRACT_SIGNED,EXTRACT_UNSIGNED): Delete.
	(sim_disassemble_insn): Update prototype.
	* cgen-trace.c (current_insn,insn_fields): New static locals.
	(trace_insn): Set them.
	* cgen-utils.scm: #include cgen-engine.h.
	(sim_disassemble_insn): New arg insn_fields.
	Handle variable length insns.
	* genmloop.sh: Only emit pbb decls if -pbb.
	(${cpu}_scache_lookup): New arg `vpc'.
	(scache support): Fetch pc before entering loop.