Annotation of qemu/gen-icount.h, revision 1.1.1.2

1.1       root        1: /* Helpers for instruction counting code generation.  */
                      2: 
                      3: static TCGArg *icount_arg;
                      4: static int icount_label;
                      5: 
                      6: static inline void gen_icount_start(void)
                      7: {
                      8:     TCGv_i32 count;
                      9: 
                     10:     if (!use_icount)
                     11:         return;
                     12: 
                     13:     icount_label = gen_new_label();
                     14:     count = tcg_temp_local_new_i32();
                     15:     tcg_gen_ld_i32(count, cpu_env, offsetof(CPUState, icount_decr.u32));
                     16:     /* This is a horrid hack to allow fixing up the value later.  */
                     17:     icount_arg = gen_opparam_ptr + 1;
                     18:     tcg_gen_subi_i32(count, count, 0xdeadbeef);
                     19: 
                     20:     tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, icount_label);
                     21:     tcg_gen_st16_i32(count, cpu_env, offsetof(CPUState, icount_decr.u16.low));
                     22:     tcg_temp_free_i32(count);
                     23: }
                     24: 
                     25: static void gen_icount_end(TranslationBlock *tb, int num_insns)
                     26: {
                     27:     if (use_icount) {
                     28:         *icount_arg = num_insns;
                     29:         gen_set_label(icount_label);
                     30:         tcg_gen_exit_tb((long)tb + 2);
                     31:     }
                     32: }
                     33: 
1.1.1.2 ! root       34: static inline void gen_io_start(void)
1.1       root       35: {
                     36:     TCGv_i32 tmp = tcg_const_i32(1);
                     37:     tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUState, can_do_io));
                     38:     tcg_temp_free_i32(tmp);
                     39: }
                     40: 
                     41: static inline void gen_io_end(void)
                     42: {
                     43:     TCGv_i32 tmp = tcg_const_i32(0);
                     44:     tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUState, can_do_io));
                     45:     tcg_temp_free_i32(tmp);
                     46: }

unix.superglobalmegacorp.com