Right Rotation Of 32-Bit Data - Mitsubishi Electric MELSEC-Q/L Programming Manual

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Right rotation of 32-bit data

DROR(P), DRCR(P)

Redundant Universal

DRORP, DRCRP

(D): Head number of the devices to rotate (BIN 32 bits)

Number of rotations (0 to 31) (BIN 16 bits)

Internal device

Processing details

• The 32-bit data of the device designated at (D), not including the carry flag, is rotated n-bits to the right. The carry flag turns

ON or OFF depending on its status prior to the execution of the DROR instruction.

b30 b29 b28 b27

n-bit rotation

• 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 = 31

and (specified number of bits) = 24 bits, the remainder of 31 / 24 = 1 is "7", and the data is rotated 7 bits.

• Specify any of 0 to 31 as n. If the value specified as n is 32 or greater, the remainder of n / 32 is used for rotation. For

example, when n = 34, the contents are rotated two bits to the right since the remainder of 34 / 32 = 1 is "2".

• Rotates 32-bit data of the device designated by (D), including the carry flag, n-bits to the right. The carry flag goes ON or

OFF depending on its status prior to the execution of the DRCR instruction.