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