| /* { 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" } } */ |