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/* { dg-do compile } */
/* { dg-options "-mint-register=3 -msave-acc-in-interrupts" } */
/* Verify that the RX specific function attributes work. */
void fast_interrupt (void) __attribute__((__fast_interrupt__));
void interrupt (void) __attribute__((__interrupt__));
int naked (int) __attribute__((__naked__));
int flag = 0;
/* Fast interrupt handler. Only uses registers marked as fixed
by the -fixed-xxx gcc command line option. Returns via RTFI. */
void
fast_interrupt (void)
{
flag = 1;
}
/* Interrupt handler. Must preserve any register it uses, even
call clobbered ones. Returns via RTE. */
void
interrupt (void)
{
switch (flag)
{
case 0:
flag = -1;
break;
case 1:
case 2:
case 4:
flag = flag - 2;
break;
case 5:
case 7:
case 6:
flag ^= 3;
break;
default:
naked (flag * 2);
break;
}
}
/* Naked function. The programmer must supply the function's
prologue and epilogue instructions. */
int
naked (int arg)
{
flag = arg;
}
/* { dg-final { scan-assembler "rtfi" } } */
/* { dg-final { scan-assembler "rte" } } */
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