Z80 Instruction Set — Shift/Rotate

RL

RL (reg_index + ofs₈)

Operation	The contents of the memory location pointed to by regindex plus ofs8 are rotated left one bit position. The contents of bit 7 are copied to the carry flag and the previous contents of the carry flag are copied to bit 0.
Op Code	[regindex] : 11001011 : [ofs8] : 00010110 Register Bit Field IX 11011101 IY 11111101
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	23

RLA

RLA

Operation	The contents of A are rotated left one bit position. The contents of bit 7 are copied to the carry flag and the previous contents of the carry flag are copied to bit 0.
Op Code	00010111
Flags	S Z P/V are not affected H N are reset See instruction for C.
T States	4

RLC

RLC reg₈

Operation	The contents of reg8 are rotated left one bit position. The contents of bit 7 are copied to the carry flag and bit 0.
Op Code	11001011 : 00000[reg8] Register Bit Field A 111 B 000 C 001 D 010 E 011 H 100 L 101 (HL) 110
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	8 or 15 (HL)

RLC (reg_index + ofs₈)

Operation	The contents of the memory location pointed to by regindex plus ofs8 are rotated left one bit position. The contents of bit 7 are copied to the carry flag and bit 0.
Op Code	[regindex] : 11001011 : [ofs8] : 00000110 Register Bit Field IX 11011101 IY 11111101
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	23

RLCA

RLCA

Operation	The contents of A are rotated left one bit position. The contents of bit 7 are copied to the carry flag and bit 0.
Op Code	00000111
Flags	S Z P/V are not affected H N are reset See instruction for C.
T States	4

RLD

RLD

Operation	The contents of the low-order nibble of (HL) are copied to the high-order nibble of (HL). The previous contents are copied to the low-order nibble of A. The previous contents are copied to the low-order nibble of (HL).
Op Code	11101101 : 01101111
Flags	Flags refer to state of A S Z are affected as defined H N is reset P/V is parity C is not affected
T States	18

RR

RR reg₈

Operation	The contents of reg8 are rotated right one bit position. The contents of bit 0 are copied to the carry flag and the previous contents of the carry flag are copied to bit 7.
Op Code	11001011 : 00011[reg8] Register Bit Field A 111 B 000 C 001 D 010 E 011 H 100 L 101 (HL) 110
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	8 or 15 (HL)

RR (reg_index + ofs₈)

Operation	The contents of the memory location pointed to by regindex plus ofs8 are rotated right one bit position. The contents of bit 0 are copied to the carry flag and the previous contents of the carry flag are copied to bit 7.
Op Code	[regindex] : 11001011 : [ofs8] : 00011110 Register Bit Field IX 11011101 IY 11111101
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	23

RRA

RRA

Operation	The contents of A are rotated right one bit position. The contents of bit 0 are copied to the carry flag and the previous contents of the carry flag are copied to bit 7.
Op Code	00011111
Flags	S Z P/V are not affected H N are reset See instruction for C.
T States	4

RRC

RRC reg₈

Operation	The contents of reg8 are rotated left one bit position. The contents of bit 0 are copied to the carry flag and bit 7.
Op Code	11001011 : 00001[reg8] Register Bit Field A 111 B 000 C 001 D 010 E 011 H 100 L 101 (HL) 110
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	8 or 15 (HL)

RRC (reg_index + ofs₈)

Operation	The contents of the memory location pointed to by regindex plus ofs8 are rotated right one bit position. The contents of bit 0 are copied to the carry flag and bit 7.
Op Code	[regindex] : 11001011 : [ofs8] : 00001110 Register Bit Field IX 11011101 IY 11111101
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	23

RRCA

RRCA

Operation	The contents of A are rotated right one bit position. The contents of bit 0 are copied to the carry flag and bit 7.
Op Code	00001111
Flags	S Z P/V are not affected H N are reset See instruction for C.
T States	4

RRD

RRD

Operation	The contents of the low-order nibble of (HL) are copied to the low-order nibble of A. The previous contents are copied to the high-order nibble of (HL). The previous contents are copied to the low-order nibble of (HL).
Op Code	11101101 : 01100111
Flags	Flags refer to state of A S Z are affected as defined H N is reset P/V is parity C is not affected
T States	18

SLA

SLA reg₈

Operation	The contents of reg8 are shifted left one bit position. The contents of bit 7 are copied to the carry flag and a zero is put into bit 0.
Op Code	11001011 : 00100[reg8] Register Bit Field A 111 B 000 C 001 D 010 E 011 H 100 L 101 (HL) 110
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	8 or 15 (HL)

SLA (reg_index + ofs₈)

Operation	The contents of the memory location pointed to by regindex plus ofs8 are shifted left one bit position. The contents of bit 7 are copied to the carry flag and a zero is put into bit 0.
Op Code	[regindex] : 11001011 : [ofs8] : 00100110 Register Bit Field IX 11011101 IY 11111101
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	23

SRA

SRA reg₈

Operation	The contents of reg8 are shifted right one bit position. The contents of bit 0 are copied to the carry flag and the previous contents of bit 7 are unchanged.
Op Code	11001011 : 00101[reg8] Register Bit Field A 111 B 000 C 001 D 010 E 011 H 100 L 101 (HL) 110
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	8 or 15 (HL)

SRA (reg_index + ofs₈)

Operation	The contents of the memory location pointed to by regindex plus ofs8 are shifted left one bit position. The contents of bit 7 are copied to the carry flag and a zero is put into bit 0.
Op Code	[regindex] : 11001011 : [ofs8] : 00101110 Register Bit Field IX 11011101 IY 11111101
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	23

SRL

SRL reg₈

Operation	The contents of reg8 are shifted right one bit position. The contents of bit 0 are copied to the carry flag and a zero is put into bit 7.
Op Code	11001011 : 00111[reg8] Register Bit Field A 111 B 000 C 001 D 010 E 011 H 100 L 101 (HL) 110
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	8 or 15 (HL)

SRL (reg_index + ofs₈)

Operation	The contents of the memory location pointed to by regindex plus ofs8 are shifted right one bit position. The contents of bit 0 are copied to the carry flag and a zero is put into bit 7.
Op Code	[regindex] : 11001011 : [ofs8] : 00111110 Register Bit Field IX 11011101 IY 11111101
Flags	S Z are affected as defined H N are reset P/V is parity See instruction for C
T States	23