1 files changed, 44 insertions, 0 deletions
diff --git a/abs.asm b/abs.asm
new file mode 100644
index 0000000..1908eef
--- /dev/null
+++ b/abs.asm
@@ -0,0 +1,44 @@
+format ELF64
+
+extrn	printf
+extrn	puts
+extrn	scanf
+public	main
+
+section '.text' executable
+
+main:
+	push	rbp
+	mov	rbp,rsp
+	
+	mov	edi,prompt
+	call	puts
+	
+	sub	rsp,16
+	
+	mov	rsi,rsp
+	mov	edi,readint
+	xor	eax,eax
+	call	scanf
+	
+	mov	rax,[rsp]
+	
+	add	rsp,16
+	
+	cqo
+	xor	rax,rdx
+	sub	rax,rdx
+	
+	mov	rsi,rax	
+	mov	edi,msg
+	xor	eax,eax
+	call	printf
+	
+	leave
+	ret
+
+section '.data' writable align 16
+
+msg	db	"Absolute value is %lu",0xA,0
+prompt	db	"Enter a negative integer.",0
+readint	db	"%ld",0