.text
	.global	add_bignum
	.type	add_bignum, @function
add_bignum:

    mov %rdx,%r11
    xor %r13,%r13

    xor %r9,%r9
    xor %r10,%r10

    mov (%rdi),%ecx
    mov (%rsi),%ebx

    add $4,%rdi
    add $4,%rsi
    add $4,%rdx

    cmp %rcx,%rbx

    ja wieksze_rsi

wieksze_rdi:

    and %rcx,%rcx
    jz koniec

    and %rbx,%rbx
    jz nie_dodawaj2

    mov (%rsi),%r10b
    add %r10,%r9
    sub $1,%rbx

nie_dodawaj2:

    mov (%rdi),%r10b
    add %r10,%r9
    sub $1,%rcx

    mov %r9b,(%rdx)
    shr $8,%r9

    add $1,%rdi
    add $1,%rsi
    add $1,%rdx

    add $1,%r13

    jmp wieksze_rdi


wieksze_rsi:

    and %rbx,%rbx
    jz koniec

    and %rcx,%rcx
    jz nie_dodawaj1

    mov (%rdi),%r10b
    add %r10,%r9
    sub $1,%rcx

nie_dodawaj1:

    mov (%rsi),%r10b
    add %r10,%r9
    sub $1,%rbx

    mov %r9b,(%rdx)
    shr $8,%r9

    add $1,%rdi
    add $1,%rsi
    add $1,%rdx

    add $1,%r13

    jmp wieksze_rsi

koniec:

   and %r9,%r9
   jz nie_dodawaj3

   mov %r9b,(%rdx)
   add $1,%r13

nie_dodawaj3:

    mov %r13d,(%r11)

    ret

	.size	add_bignum, . - add_bignum