/* Helpers for instruction counting code generation. */ static TCGArg *icount_arg; static int icount_label; static inline void gen_icount_start(void) { TCGv_i32 count; if (!use_icount) return; icount_label = gen_new_label(); count = tcg_temp_local_new_i32(); tcg_gen_ld_i32(count, cpu_env, offsetof(CPUState, icount_decr.u32)); /* This is a horrid hack to allow fixing up the value later. */ icount_arg = gen_opparam_ptr + 1; tcg_gen_subi_i32(count, count, 0xdeadbeef); tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, icount_label); tcg_gen_st16_i32(count, cpu_env, offsetof(CPUState, icount_decr.u16.low)); tcg_temp_free_i32(count); } static void gen_icount_end(TranslationBlock *tb, int num_insns) { if (use_icount) { *icount_arg = num_insns; gen_set_label(icount_label); tcg_gen_exit_tb((long)tb + 2); } } static inline void gen_io_start(void) { TCGv_i32 tmp = tcg_const_i32(1); tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUState, can_do_io)); tcg_temp_free_i32(tmp); } static inline void gen_io_end(void) { TCGv_i32 tmp = tcg_const_i32(0); tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUState, can_do_io)); tcg_temp_free_i32(tmp); }