hello_world.myvm

program: macro output_literal(%literal): // I am a comment at the end of a macro definition
%literal mov 0 out end_macro: macro print_positive_offset(%offset): print_offset(%offset, add) end_macro: macro print_negative_offset(%offset): print_offset(%offset, sub) end_macro: macro print_offset(%offset, %pos_or_neg): mov 3 1 %offset mov 0 2 %pos_or_neg mov 3 out end_macro:

    // 63 is biggest literal value we can load, we still need to add 9 to get to H
    63
    mov 0 3

    // H
    print_positive_offset(9)
    // E
    print_negative_offset(3)
    // L
    print_positive_offset(7)
    // L
    mov 3 out
    // O
    print_positive_offset(3)
    // WHITESPACE
    32
    mov 0 out

    // W
    print_positive_offset(8)
    // O
    print_negative_offset(8)
    // R
    print_positive_offset(3)
    // L
    print_negative_offset(6)
    // D
    print_negative_offset(8)
    // !
    exclamation_mark = 33
    output_literal(exclamation_mark)