rasp/tests/test_call.asm

.section data 0x1000 {
    factorial:
        cmplt %r0, 2
        jnz factorial_one

        push %r0
        sub %r0, 1
        call factorial
        pop %r0
        mul %status, %r0
        jmp factorial_end

    factorial_one:
        mov %status, 1
    factorial_end:
        ret

    main:
        mov %r0, 6
        call factorial
        cmpeq %status, 720
        jz fail
        mov %status, 0
        jmp end
    fail:
        mov %status, 1
    end:
        halt

    .export main
}

.meta {
    ip: main
}