target: [tcg] Use a generic enum for DISAS_ values

Used later. An enum makes expected values explicit and
bounds the value space of switches.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <150002049746.22386.2316077281615710615.stgit@frigg.lan>
Signed-off-by: Richard Henderson <rth@twiddle.net>
diff --git a/target/cris/translate.c b/target/cris/translate.c
index 12b96eb..38a999e 100644
--- a/target/cris/translate.c
+++ b/target/cris/translate.c
@@ -31,6 +31,7 @@
 #include "exec/helper-proto.h"
 #include "mmu.h"
 #include "exec/cpu_ldst.h"
+#include "exec/translator.h"
 #include "crisv32-decode.h"
 
 #include "exec/helper-gen.h"
@@ -50,7 +51,11 @@
 #define BUG() (gen_BUG(dc, __FILE__, __LINE__))
 #define BUG_ON(x) ({if (x) BUG();})
 
-#define DISAS_SWI 5
+/* is_jmp field values */
+#define DISAS_JUMP    DISAS_TARGET_0 /* only pc was modified dynamically */
+#define DISAS_UPDATE  DISAS_TARGET_1 /* cpu state was modified dynamically */
+#define DISAS_TB_JUMP DISAS_TARGET_2 /* only pc was modified statically */
+#define DISAS_SWI     DISAS_TARGET_3
 
 /* Used by the decoder.  */
 #define EXTRACT_FIELD(src, start, end) \