[wip] always compile in cgen logic

see if sizeof cgen structs differ in some way.

sim/common/cgen-cpu.h

diff --git a/sim/common/cgen-cpu.h b/sim/common/cgen-cpu.h
index d65e0db..6b0f85c 100644
--- a/sim/common/cgen-cpu.h
+++ b/sim/common/cgen-cpu.h
@@ -105,6 +105,6 @@
 
 /* Shorthand macro for fetching registers.
    CPU_CGEN_HW is defined in cpu.h.  */
-#define CPU(x) (CPU_CGEN_HW (current_cpu)->x)
+//#define CPU(x) (CPU_CGEN_HW (current_cpu)->x)
 
 #endif /* CGEN_CPU_H */

sim/common/cgen-defs.h

diff --git a/sim/common/cgen-defs.h b/sim/common/cgen-defs.h
index b9e0c06..ff01705 100644
--- a/sim/common/cgen-defs.h
+++ b/sim/common/cgen-defs.h
@@ -20,6 +20,9 @@
 #ifndef CGEN_DEFS_H
 #define CGEN_DEFS_H
 
+#include "opcode/cgen.h"
+#include "cgen-types.h"
+
 /* Compute number of longs required to hold N bits.  */
 #define HOST_LONGS_FOR_BITS(n) \
   (((n) + sizeof (long) * 8 - 1) / sizeof (long) * 8)

sim/common/cgen-scache.h

diff --git a/sim/common/cgen-scache.h b/sim/common/cgen-scache.h
index 1043920..29e80832 100644
--- a/sim/common/cgen-scache.h
+++ b/sim/common/cgen-scache.h
@@ -20,6 +20,8 @@
 #ifndef CGEN_SCACHE_H
 #define CGEN_SCACHE_H
 
+#include "cgen-types.h"
+
 /* When caching bb's, instructions are extracted into "chains".
    SCACHE_MAP is a hash table into these chains.  */
 

sim/common/sim-cpu.h

diff --git a/sim/common/sim-cpu.h b/sim/common/sim-cpu.h
index 90e294e..8994a19 100644
--- a/sim/common/sim-cpu.h
+++ b/sim/common/sim-cpu.h
@@ -28,9 +28,7 @@
 /* Type of function to return an insn name.  */
 typedef const char * (CPU_INSN_NAME_FN) (sim_cpu *, int);
 
-#ifdef CGEN_ARCH
-# include "cgen-cpu.h"
-#endif
+#include "cgen-cpu.h"
 
 /* Types for register access functions.
    These routines implement the sim_{fetch,store}_register interface.  */
@@ -123,11 +121,9 @@
   PC_STORE_FN *pc_store;
 #define CPU_PC_STORE(c) ((c)->pc_store)
 
-#ifdef CGEN_ARCH
   /* Static parts of cgen.  */
   CGEN_CPU cgen_cpu;
 #define CPU_CGEN_CPU(cpu) ((cpu)->cgen_cpu)
-#endif
 
   /* Pointer for sim target to store arbitrary cpu data.  Normally the
      target should define a struct and use it here.  */