7 APPLICATION INSTRUCTIONS
7.2 Rotation Instructions
385
7
■RCL
• Rotates the 16-bit data of the device designated by (D), including the carry flag, n-bits to the left. The carry flag turns ON or
OFF depending on its status prior to the execution of RCL 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 data is rotated 2 bits to the left since the remainder of 18 / 16 = 1 is "2".
• There is no operation error in the ROL(P) or RCL(P) instruction.
0
1 00 1 0000 0
0
000
0
0
Carry flag
(SM700)
D
0
001 00000 0
0
000
0
D
Value of carry flag
Value of carry flag
0
Carry flag
(SM700)
Left rotation (1 bit)
Left rotation (1 bit)
1
0
0
Value of b15
0
1 0000000 0
0
000
0
D
Carry flag
(SM700)
1
Value of b15
D
Carry flag
(SM700)
Left rotation (n bits)
Value of b(16-n)
b9
b15 b10b14 b13 b12 b11 b8
b7
b6 b5 b4 b3 b2 b1 b0
b9
b15 b10b14 b13 b12 b11 b8
b7
b6 b5 b4 b3 b2 b1 b0
b9
b15 b10b14 b13 b12 b11 b8
b7
b6 b5 b4 b3 b2 b1 b0
b9
b15 b10b14 b13 b12 b11 b8
b7
b6 b5 b4 b3 b2 b1
b0
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