diff options
Diffstat (limited to 'include/exec/gen-icount.h')
| -rw-r--r-- | include/exec/gen-icount.h | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/include/exec/gen-icount.h b/include/exec/gen-icount.h index 05d89d358f..a011324b92 100644 --- a/include/exec/gen-icount.h +++ b/include/exec/gen-icount.h @@ -5,14 +5,13 @@ /* Helpers for instruction counting code generation. */ -static TCGArg *icount_arg; +static int icount_start_insn_idx; static TCGLabel *icount_label; static TCGLabel *exitreq_label; static inline void gen_tb_start(TranslationBlock *tb) { TCGv_i32 count, flag, imm; - int i; exitreq_label = gen_new_label(); flag = tcg_temp_new_i32(); @@ -31,13 +30,12 @@ static inline void gen_tb_start(TranslationBlock *tb) -ENV_OFFSET + offsetof(CPUState, icount_decr.u32)); imm = tcg_temp_new_i32(); + /* We emit a movi with a dummy immediate argument. Keep the insn index + * of the movi so that we later (when we know the actual insn count) + * can update the immediate argument with the actual insn count. */ + icount_start_insn_idx = tcg_op_buf_count(); tcg_gen_movi_i32(imm, 0xdeadbeef); - /* This is a horrid hack to allow fixing up the value later. */ - i = tcg_ctx.gen_last_op_idx; - i = tcg_ctx.gen_op_buf[i].args; - icount_arg = &tcg_ctx.gen_opparam_buf[i + 1]; - tcg_gen_sub_i32(count, count, imm); tcg_temp_free_i32(imm); @@ -53,7 +51,9 @@ static void gen_tb_end(TranslationBlock *tb, int num_insns) tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_REQUESTED); if (tb->cflags & CF_USE_ICOUNT) { - *icount_arg = num_insns; + /* Update the num_insn immediate parameter now that we know + * the actual insn count. */ + tcg_set_insn_param(icount_start_insn_idx, 1, num_insns); gen_set_label(icount_label); tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_ICOUNT_EXPIRED); } |