XA User Guide 6-152 4/17/98
RRC Rotate Right Through Carry
Syntax: RRC Rd, #data4
Operation:
Description: If the count operand is greater than 0, the destination operand is rotated right through
the carry flag by the number of bits specified in the immediate data operand. The data size may be
8 or 16 bits. The number of bit positions shifted may be from 0 to 15.
If the count operand is 0, no rotate is performed.
Size: Byte, Word
Flags Updated: C, N, Z
Bytes:2
Clocks: 4 + 1 for each 2 bits of shift
Encoding:
C MSB LSB
(Rd)
count <- #data4
Do While (count not equal to 0)
(temp) <- (C)
(C) <- (dest
0
)
(dest
n
) <- (dest
n+1
)
(dest
msb
) <- (temp)
(count) <- count -1
End While
1 0 1 1 SZ 1 1 1 d d d d #data4
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