Added commentary

ft_strcmp.s

@@ -1,27 +1,27 @@
 global ft_strcmp
 
 ft_strcmp:
-	xor r8, r8
-	xor rax, rax
+	xor r8, r8 ; r8 = 0
+	xor rax, rax ; rax = 0
 
 .count:
-	mov al, BYTE [rdi + r8]
-	mov dl, BYTE [rsi + r8]
-	test al, al
-	jz .end
-	test dl, dl
-	jz .end
-	cmp al, dl
-	jne .end
-	inc r8
-	jmp .count
+	mov al, BYTE [rdi + r8] ; al = s1[r8]
+	mov dl, BYTE [rsi + r8]; dl = s2[r8]
+	test al, al ; if (al == 0)
+	jz .end     ; goto end
+	test dl, dl ; if (dl == 0)
+	jz .end ; goto end
+	cmp al, dl ; compare al and dl
+	jne .end ; if not equal, goto end
+	inc r8 ; r8++
+	jmp .count ; repeat
 
 .end: 
-	sub al, dl
+	sub al, dl ; take diff between al and dl
 	js .neg
-	ret
+	ret ; return it
 
 .neg:
-	neg al
-	neg rax
-	ret
+	neg al ; al = -al;
+	neg rax ; al is the first 8 bit of rax, so reverse it
+	ret ; return it