Z8
®
CPU
User Manual
UM001604-0108 Instruction Description
225
Rotate Right Through Carry
Syntax
RRC dst
Instruction Format
Operation
C ← dst(0)
dst(0) ← dst(1)
dst(1) ← dst(2)
dst(2) ← dst(3)
dst(3) ← dst(4)
dst(4) ← dst(5)
dst(5) ← dst(6)
dst(6) ← dst(7)
dst(7) ← C
The contents of the destination operand with the C Flag are rotated right by one bit posi-
tion. The initial value of bit 0 replaces the C Flag and the initial value of the C Flag
replaces bit 7, as shown below.
Address modes R or IR can be used to specify a 4-bit Working Register. In this format, the
destination Working Register operand is specified by adding
1110b (Eh) to the high nibble
Cycles
OPC
(Hex)
Address Mode
dst
OPC dst
6C0 R
6C1 IR
Flag Description
C Set if the bit rotated from the least significant bit position was 1 (that is, bit 0 was 1).
Z Set if the result is zero; cleared otherwise.
S Set if the result bit 7 is set; cleared otherwise.
V Set if arithmetic overflow occurred (if the sign of the destination operand changed
during rotation); cleared otherwise.
D Unaffected
H Unaffected
CD7 D6 D5 D4 D3 D2 D1 D0
Note:
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