From 5b069057fa9dadc84dd0782776c783b8c8eac35e Mon Sep 17 00:00:00 2001
From: Jan-Erik Rediger <janerik@rediger.net>
Date: Fri, 15 Sep 2023 11:57:47 +0000
Subject: [PATCH] chapter 0x01 explained

---
 0x01.asm | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 0x01.asm

diff --git a/0x01.asm b/0x01.asm
new file mode 100644
index 0000000..a492c2d
--- /dev/null
+++ b/0x01.asm
@@ -0,0 +1,13 @@
+	BITS 64
+	SECTION .text
+	global main
+
+; calculate the fibonacci sequence.
+; n_2 = n_1 + n_0
+
+main:
+	mov rax, 1 ; inital values
+	mov rdx, 1
+	.loop: ; a label
+	xadd	rax, rdx ; swap rdx and rax, store rdx+rax into rax
+	loop	.loop ; jump back to the .loop label