asmio/macros.asm at master · ganimtron-10/asmio · GitHub

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%macro pushReg 0
    push eax
    push ebx
    push ecx
    push edx
%endmacro

%macro popReg 0
    pop edx
    pop ecx
    pop ebx
    pop eax
%endmacro

%macro print 2
    pushReg

    mov eax, 4
    mov ebx, 1
    mov ecx, %1
    mov edx, %2
    int 0x80

    popReg
%endmacro

%macro exit 1
    mov eax, 1
    mov ebx, %1
    int 0x80
%endmacro


%macro scan 2
    pushReg

    mov eax, 3
    mov ebx, 0
    mov ecx, %1
    mov edx, %2
    int 0x80

    popReg
%endmacro

%macro int_to_ascii 3
    pushReg
    push esi
    push edi

    mov eax, %1
    mov edi, %2 + 15
    mov byte [edi], 0

    %xdefine iterator_label iterate%3

    iterator_label:
        xor edx, edx
        mov ebx, 10
        div ebx
        add dl, '0'
        dec edi
        mov byte [edi], dl
        test eax, eax
        jnz iterator_label


    mov esi, %2 + 15
    sub esi, edi
    mov edx, esi

    print edi, edx

    pop edi
    pop esi
    popReg

%endmacro