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accel/tcg: Introduce is_same_page()

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Introduce a function that checks whether a given address is on the same
page as where disassembly started. Having it improves readability of
the following patches.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20220811095534.241224-3-iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[rth: Make the DisasContextBase parameter const.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Ilya Leoshkevich 2022-08-11 11:55:31 +02:00 committed by Richard Henderson
parent d64655c2c3
commit f3b2b81b6f
1 changed files with 10 additions and 0 deletions
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10
include/exec/translator.h
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@ -187,4 +187,14 @@ FOR_EACH_TRANSLATOR_LD(GEN_TRANSLATOR_LD)
#undef GEN_TRANSLATOR_LD
/*
* Return whether addr is on the same page as where disassembly started.
* Translators can use this to enforce the rule that only single-insn
* translation blocks are allowed to cross page boundaries.
*/
static inline bool is_same_page(const DisasContextBase *db, target_ulong addr)
{
return ((addr ^ db->pc_first) & TARGET_PAGE_MASK) == 0;
}
#endif /* EXEC__TRANSLATOR_H */