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■RCR
• Rotates 16-bit data of the device designated by (D), including the carry flag, n-bits to the right. The carry flag is ON or OFF
depending on the status prior to the execution of the ROR instruction.
b15
b14 b13 b12 b11 b10 b9
0
0
0
0
D
b15
b14 b13 b12 b11 b10 b9
0
0
0
0
D
Value of carry flag
b15
b14 b13 b12 b11 b10 b9
1
0
0
0
D
Value of carry flag
b15
b14 b13 b12 b11 b10 b9
D
• When a bit device is designated for (D), a rotation is performed within the device range specified by digit specification. The
number of bits by which a rotation is executed is the remainder of n / (specified number of bits). For example, when n = 15
and (specified number of bits) = 12 bits, the remainder of 15 / 12 = 1 is "3", and the data is rotated 3 bits.
• Specify any of 0 to 15 as n. If the value specified as n is 16 or greater, the remainder of n / 16 is used for rotation. For
example, when n = 18, the contents are rotated two bits to the right since the remainder of 18 / 16 = 1 is "2".
Operation error
• There is no operation error in the ROR(P) or RCR(P) instruction.
7 APPLICATION INSTRUCTIONS
382
7.2 Rotation Instructions
b8
b7
b6 b5 b4 b3 b2 b1 b0
0
0
0
0
0
0
0
0
Right rotation (1 bit)
b8
b7
b6 b5 b4 b3 b2 b1 b0
0
0
0
0
0
0
0
0
Right rotation (1 bit)
b8
b7
b6 b5 b4 b3 b2 b1 b0
0
0
0
0
0
0
0
0
Right rotation (n bits)
b8
b7
b6 b5 b4 b3 b2 b1 b0
Carry flag
(SM700)
0
1
0
1
0
Carry flag
(SM700)
0
0
1
0
1
Value of b0
Carry flag
(SM700)
0
0
0
0
1
Value of b0
Carry flag
(SM700)
Value of b(n-1)
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