target/nios2: in line the semantics of DISAS_UPDATE with other targets

In line the semantics of DISAS_UPDATE on nios2 target with other targets
which is to explicitly write the PC back into the cpu state before doing
a tcg_gen_exit_tb().

Signed-off-by: Wentong Wu <[email protected]>
Message-id: [email protected]
Reviewed-by: Richard Henderson <[email protected]>
Signed-off-by: Peter Maydell <[email protected]>

Author: wentongwu

target/nios2/translate.c

@@ -865,14 +865,14 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
     /* Indicate where the next block should start */
     switch (dc->is_jmp) {
     case DISAS_NEXT:
+    case DISAS_UPDATE:
         /* Save the current PC back into the CPU register */
         tcg_gen_movi_tl(cpu_R[R_PC], dc->pc);
         tcg_gen_exit_tb(NULL, 0);
         break;
 
     default:
     case DISAS_JUMP:
-    case DISAS_UPDATE:
         /* The jump will already have updated the PC register */
         tcg_gen_exit_tb(NULL, 0);
         break;