When the ROL or ROLP instruction is executed, the S1 bits are rotated to the left S2 number of bits. Every time 1 bit is rotated, the topmost bit (the most significant bit) is rotated to the bottom-most bit (least significant bit). The result is stored in D1. The ROL and ROLP instructions always pass power. When using the ROL and ROLP instructions, if the variables specified in operands S1 and D1 are not the same type, an error will occur. Designate the same variable type in operands S1 and D1.
Refer to the following for specifying a constant.
S1: Rotation Address
Specify the address to rotate bits.
S2: Number of bits to rotate
Specifies the number of bits to rotate.
D1: Storage device
Specifies the address to store the rotation result.
For example, when 1 bit is rotated to left
When operand D1 is an integer variable
When operand D1 is an integer variable and you want to input hexadecimal values in operands S1 and S2.
When 0x (zero and lower case "x") is input, the following values become hexadecimal values.
Use the same format when rotating data in a specified array (integer variable array) and when specifying an array element.
An error will occur if the formats are different.
If the S1 and D1 arrays are the same size, S1 is treated like a single giant integer. Bits are rotated from one element to the next element.
Bits are rotated from one element to the next. The entire array is rotated, not just bits in each element. Specify S2 as 0 or higher, up to (32 x Array Size -1).
If both S1 and D1 are not arrays, 32 bits are rotated. For S2, specify a value between 0 and 31.