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target/sh4: ignore interrupts in a delay slot

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Delay slots are indivisible, therefore avoid scheduling an interrupt in
the delay slot. However exceptions are possible.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2017-05-17 00:48:18 +02:00
parent 9a562ae7ba
commit 5c6f3eb7db
1 changed files with 10 additions and 2 deletions
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8
target/sh4/helper.c
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@ -871,8 +871,16 @@ int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
bool superh_cpu_exec_interrupt(CPUState *cs, int interrupt_request) bool superh_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
{ {
if (interrupt_request & CPU_INTERRUPT_HARD) { if (interrupt_request & CPU_INTERRUPT_HARD) {
SuperHCPU *cpu = SUPERH_CPU(cs);
CPUSH4State *env = &cpu->env;
/* Delay slots are indivisible, ignore interrupts */
if (env->flags & DELAY_SLOT_MASK) {
return false;
} else {
superh_cpu_do_interrupt(cs); superh_cpu_do_interrupt(cs);
return true; return true;
} }
}
return false; return false;
} }