add other basic functions and test with them

srcs/ft_strcmp.s

@@ -0,0 +1,48 @@
+section .text
+	global ft_strcmp
+
+ft_strcmp:
+	xor rax, rax
+
+	test rdi, rdi ; test if args are false
+	je err
+	test rsi, rsi
+	je err
+loop_start:
+	mov al, [rdi]
+	cmp al, [rsi]
+	jne compare 
+
+	test al, al ; test if rdi is \0
+	je compare
+
+	mov al, [rsi] ; test if rsi is \0
+	test al, al
+	je compare 
+
+	lea rsi, [rsi + 1]
+	lea rdi, [rdi + 1]
+	jmp loop_start
+
+
+compare:
+	mov al, [rdi]
+	cmp al, [rsi]
+	jl lower
+	jg greater
+	mov eax, 0
+	jmp end
+
+lower:
+	mov eax, -1
+	jmp end
+
+greater:
+	mov eax, 1
+	jmp end
+
+err:
+	mov eax, 0
+
+end:
+	ret