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target/sh4: move DELAY_SLOT_TRUE flag into a separate global

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Instead of using one bit of the env flags to store the condition of the
next delay slot, use a separate global. It simplifies reading and
writing the flags variable and also removes some confusion between
ctx->envflags and env->flags.

Note that the global is first transfered to a temp in order to be
able to discard the global before the brcond.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2017-05-01 23:20:43 +02:00
parent 24b09d9d8b
commit 47b9f4d5a4
3 changed files with 16 additions and 18 deletions
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2
target/sh4/helper.c
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@ -168,7 +168,7 @@ void superh_cpu_do_interrupt(CPUState *cs)
/* Branch instruction should be executed again before delay slot. */
env->spc -= 2;
/* Clear flags for exception/interrupt routine. */
env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL | DELAY_SLOT_TRUE);
env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL);
}
if (do_exp) {