Zilog Z80380 - Manual (Page 182)

5-148
Z380 ™
U SER ' S M ANUAL
DC-8297-03
Z ILOG
RLCW
ROTATE LEFT CIRCULAR (WORD)
RLCW dst dst = R, RX, IR, X
Operation: tmp
←
dst
C
←
dst(15)
dst(0)
←
tmp(15)
dst(n+1)
←
tmp(n) for n = 0 to 14
The contents of the destination operand are rotated left one bit position. The most significant
bit 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 the most significant bit was a 1; cleared otherwise
Addressing Execute
Mode Syntax Instruction Format Time Note
R: RLCW R 11101101 11001011 000000rr 2
RX: RLCW RX 11101101 11001011 0000010y 2
IR: RLCW (HL) 11101101 11001011 00000010 2+r
X: RLCW (XY+d) 11y11101 11001011 ——d— 00000010 4+r I
Field Encodings: rr: 00 for BC, 01 for DE, 11 for HL
y:
0 for IX, 1 for IY