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tcg: Document tcg_qemu_tb_exec() and provide constants for low bit uses

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Document tcg_qemu_tb_exec(). In particular, its return value is a
combination of a pointer to the next translation block and some
extra information in the low two bits. Provide some #defines for
the values passed in these bits to improve code clarity.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Peter Maydell 2013-02-22 18:10:00 +00:00 • committed by Blue Swirl
parent 07ca08bac8
commit 0980011b4f
3 changed files with 49 additions and 6 deletions
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2
include/exec/gen-icount.h
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@ -32,7 +32,7 @@ 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((tcg_target_long)tb + 2);
tcg_gen_exit_tb((tcg_target_long)tb + TB_EXIT_ICOUNT_EXPIRED);
}
}