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7 APPLICATION INSTRUCTIONS
7.2 Rotation Instructions
■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.
• 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".
• There is no operation error in the ROR(P) or RCR(P) instruction.
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1 b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1 b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1 b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1 b0
1
0
00000000 0
0
001
0
0
Carry flag
(SM700)
0
0
00000000 0
0
0001
D
D
D
D
Value of carry flag
Value of carry flag
Carry flag
(SM700)
Right rotation (1 bit)
Right rotation (1 bit)
1
Value of b0
1
0
1 0000000 0
0
000
0
Carry flag
(SM700)
0
Value of b0
Carry flag
(SM700)
Right rotation (n bits)
Value of b(n-1)
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