Zilog Z80380 - Manual (Page 181)

5-147
Z380 ™
U SER ' S M ANUAL Z ILOG
DC-8297-03
RLC
ROTATE LEFT CIRCULAR (BYTE)
RLC dst dst = R, IR, X
Operation: tmp
←
dst
C
←
dst(7)
dst(0)
←
tmp(7)
dst(n+1)
←
tmp(n) for n = 0 to 6
The contents of the destination operand are rotated left one bit position. Bit 7 of the
destination operand is moved to the bit 0 position and also replaces the Carry flag.
Flags: S: Set if the most significant bit of the result is set; cleared otherwise
Z: Set if the result is zero; cleared otherwise
H: Cleared
P: Set if parity of the result is even; cleared otherwise
N: Cleared
C: Set if the bit rotated from bit 7 was a 1; cleared otherwise
Addressing Execute
Mode Syntax Instruction Format Time Note
R: RLC R 11001011 00000-r- 2
IR: RLC (HL) 11001011 00000110 2+r
X: RLC (XY+d) 11y11101 11001011 ——d— 00000110 4+r I
Field Encodings: r: per convention
y: 0 for IX, 1 for IY