| comment "subroutine prologue" | |
| .macro enter | |
| st r13,@-sp | |
| .endm | |
| comment "subroutine epilogue" | |
| .macro leave | |
| ld r13,@sp+ | |
| jmp r13 | |
| .endm | |
| .macro call subr | |
| bl \subr | |
| .endm | |
| .macro several_nops | |
| nop | |
| nop | |
| nop | |
| nop | |
| .endm | |
| comment "exit (0)" | |
| .macro exit0 | |
| ldi r4, 1 | |
| ldi r0, 0 | |
| trap 15 | |
| .endm | |
| comment "crt0 startup" | |
| .macro startup | |
| .endm |