cpu: Move can_do_io field from CPU_COMMON to CPUState
[qemu.git] / include / exec / gen-icount.h
1 #ifndef GEN_ICOUNT_H
2 #define GEN_ICOUNT_H 1
3
4 #include "qemu/timer.h"
5
6 /* Helpers for instruction counting code generation. */
7
8 static TCGArg *icount_arg;
9 static int icount_label;
10 static int exitreq_label;
11
12 static inline void gen_tb_start(void)
13 {
14 TCGv_i32 count;
15 TCGv_i32 flag;
16
17 exitreq_label = gen_new_label();
18 flag = tcg_temp_new_i32();
19 tcg_gen_ld_i32(flag, cpu_env,
20 offsetof(CPUState, tcg_exit_req) - ENV_OFFSET);
21 tcg_gen_brcondi_i32(TCG_COND_NE, flag, 0, exitreq_label);
22 tcg_temp_free_i32(flag);
23
24 if (!use_icount)
25 return;
26
27 icount_label = gen_new_label();
28 count = tcg_temp_local_new_i32();
29 tcg_gen_ld_i32(count, cpu_env, offsetof(CPUArchState, icount_decr.u32));
30 /* This is a horrid hack to allow fixing up the value later. */
31 icount_arg = tcg_ctx.gen_opparam_ptr + 1;
32 tcg_gen_subi_i32(count, count, 0xdeadbeef);
33
34 tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, icount_label);
35 tcg_gen_st16_i32(count, cpu_env, offsetof(CPUArchState, icount_decr.u16.low));
36 tcg_temp_free_i32(count);
37 }
38
39 static void gen_tb_end(TranslationBlock *tb, int num_insns)
40 {
41 gen_set_label(exitreq_label);
42 tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_REQUESTED);
43
44 if (use_icount) {
45 *icount_arg = num_insns;
46 gen_set_label(icount_label);
47 tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_ICOUNT_EXPIRED);
48 }
49 }
50
51 static inline void gen_io_start(void)
52 {
53 TCGv_i32 tmp = tcg_const_i32(1);
54 tcg_gen_st_i32(tmp, cpu_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
55 tcg_temp_free_i32(tmp);
56 }
57
58 static inline void gen_io_end(void)
59 {
60 TCGv_i32 tmp = tcg_const_i32(0);
61 tcg_gen_st_i32(tmp, cpu_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
62 tcg_temp_free_i32(tmp);
63 }
64
65 #endif