diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/exec/gen-icount.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/exec/gen-icount.h b/include/exec/gen-icount.h index 4004e6c9d0..822c43cfd3 100644 --- a/include/exec/gen-icount.h +++ b/include/exec/gen-icount.h @@ -16,6 +16,13 @@ static inline void gen_io_start(void) tcg_temp_free_i32(tmp); } +/* + * cpu->can_do_io is cleared automatically at the beginning of + * each translation block. The cost is minimal and only paid + * for -icount, plus it would be very easy to forget doing it + * in the translator. Therefore, backends only need to call + * gen_io_start. + */ static inline void gen_io_end(void) { TCGv_i32 tmp = tcg_const_i32(0); @@ -58,7 +65,6 @@ static inline void gen_tb_start(TranslationBlock *tb) tcg_gen_st16_i32(count, cpu_env, offsetof(ArchCPU, neg.icount_decr.u16.low) - offsetof(ArchCPU, env)); - /* Disable I/O by default */ gen_io_end(); } |