added 3x+1

todo gotta make it get your number from argument, so i need to get strnum working

3x+1.asm

@@ -0,0 +1,62 @@
+extern puts
+
+section .data
+	text db "Number reaches 1",0
+	even db "even",0
+	odd db "odd",0
+	number dq 7
+section .text
+	global main
+
+main:
+	sub   rsp, 8
+
+	mov r8, [number]
+_loop:
+	cmp r8, 1		;if number is 1 then end
+	je _printstupid
+
+	test r8, 1		;odd even check
+	jnz _odd
+	jz _even
+
+
+_odd:
+;	mov rdi, odd
+;	cld
+;	call puts
+
+	mov rax, r8		; gotta do this because mul only takes one argument
+	mov r9, 3
+	mul r9
+	add rax, 1
+	mov r8, rax
+	
+	jmp _loop
+
+
+_even:
+;	mov rdi, even
+;	cld
+;	call puts
+
+	xor rdx, rdx
+	mov rax, r8
+	mov rcx, 2
+	div rcx
+	mov r8, rax
+
+	jmp _loop
+
+
+
+_printstupid:
+
+	mov rdi, text
+	cld
+	call puts	;this is the put s way of printing a string
+
+
+_end:
+	add rsp, 8
+	ret

CMakeLists.txt

@@ -21,4 +21,4 @@ add_executable(length length.asm)
 add_executable(yes yes.asm)
 add_executable(case case.asm)
 add_executable(diff diff.asm)
-add_executable(arg arg.asm)
+add_executable(3x+1 3x+1.asm)