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