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source: vbox/trunk/src/recompiler/gen-icount.h@ 75569

最後變更 在這個檔案從75569是 69465,由 vboxsync 提交於 7 年 前

recompiler: scm updates

  • 屬性 svn:eol-style 設為 native
  • 屬性 svn:keywords 設為 Id Revision
檔案大小: 1.2 KB
 
1#include "qemu-timer.h"
2
3/* Helpers for instruction counting code generation. */
4
5static TCGArg *icount_arg;
6static int icount_label;
7
8static inline void gen_icount_start(void)
9{
10 TCGv_i32 count;
11
12 if (!use_icount)
13 return;
14
15 icount_label = gen_new_label();
16 count = tcg_temp_local_new_i32();
17 tcg_gen_ld_i32(count, cpu_env, offsetof(CPUState, icount_decr.u32));
18 /* This is a horrid hack to allow fixing up the value later. */
19 icount_arg = gen_opparam_ptr + 1;
20 tcg_gen_subi_i32(count, count, 0xdeadbeef);
21
22 tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, icount_label);
23 tcg_gen_st16_i32(count, cpu_env, offsetof(CPUState, icount_decr.u16.low));
24 tcg_temp_free_i32(count);
25}
26
27static void gen_icount_end(TranslationBlock *tb, int num_insns)
28{
29 if (use_icount) {
30 *icount_arg = num_insns;
31 gen_set_label(icount_label);
32 tcg_gen_exit_tb((uintptr_t)(tb + 2));
33 }
34}
35
36static inline void gen_io_start(void)
37{
38 TCGv_i32 tmp = tcg_const_i32(1);
39 tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUState, can_do_io));
40 tcg_temp_free_i32(tmp);
41}
42
43static inline void gen_io_end(void)
44{
45 TCGv_i32 tmp = tcg_const_i32(0);
46 tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUState, can_do_io));
47 tcg_temp_free_i32(tmp);
48}
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