Rrc rotate right circular (byte) – Zilog Z80380 User Manual
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Z380
™
U
SER
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S
M
ANUAL
DC-8297-03
Z
ILOG
RRC
ROTATE RIGHT CIRCULAR (BYTE)
RRC dst
dst = R, IR, X
Operation:
tmp
←
dst
C
←
dst(0)
dst(7)
←
tmp(0)
dst(n)
←
tmp(n+1) for n = 0 to 6
The contents of the destination operand are rotated right one bit position. Bit 0 of the
destination operand is moved to the bit 7 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 0 was a 1; cleared otherwise
Addressing
Execute
Mode
Syntax
Instruction Format
Time
Note
R:
RRC R
11001011 00001-r-
2
IR:
RRC (HL)
11001011 00001110
2+r
X:
RRC (XY+d)
11y11101 11001011 ——d— 00001110
4+r
I
Field Encodings:
r:
per convention
y:
0 for IX, 1 for IY