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Rotate Instructions

How to decode rotate instructions from binary

Table of Contents

Only four rotate instructions are defined in the main opcode set, all the rest require the CB prefix.

Opcode format
7	6	5	4	3	2	1	0
0	0	0	F	D	1	1	1

0	0	0	0	0	1	1	1	RLCA
0	0	0	1	0	1	1	1	RLA
0	0	0	0	0	1	1	1	RRCA
0	0	0	1	1	1	1	1	RRA

F Carry Flag
Instruction	F
With Carry	0
Without Carry	1

D Direction
Instruction	D
Left	0
Right	1