From 48d8503814af147bf844b6a6ae77e62e69204ee6 Mon Sep 17 00:00:00 2001
From: Rangi <remy.oukaour+rangi42@gmail.com>
Date: Thu, 26 Nov 2020 13:08:32 -0500
Subject: Don't

---
 Optimizing-assembly-code.md | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'Optimizing-assembly-code.md')

diff --git a/Optimizing-assembly-code.md b/Optimizing-assembly-code.md
index 8d9b2bd..791c7a6 100644
--- a/Optimizing-assembly-code.md
+++ b/Optimizing-assembly-code.md
@@ -203,6 +203,26 @@ endr
 	ld a, b
 ```
 
+And don't do:
+
+```asm
+; 17 bytes, 17 cycles
+	ld b, a
+	rlca
+	rlca
+	xor b
+	and $aa
+	xor b
+	ld b, a
+	rlca
+	rlca
+	rlca
+	rrc b
+	xor b
+	and $66
+	xor b
+```
+
 But do:
 
 ```asm
-- 
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