Shift left

Syntax

Syntax: shift_left register1, register2

• register1 = Register to shift left
• register2 = Shift left by value of register2

Use

Used to execute a logical bitwise operation shift left. Use shift_right to shift right. In the example below we'll use R1 to store a 7Bit value 100 decimal (127 decimal value maximum) and 2 seperate flags.

Example

100:     leti R1, 00000193 //Set R1 to 403 (110010011 in binary)
         let R2, R1 //This will be used for 7bit value
         leti R5, 00000002 //This will be used to store the shift amount
         andi R2, 000001FC //Perform bitwise AND operation on R2 using 111111100 binary. R2 now equals 110010000
         shift_right R2, R5 //Perform bitwise shift right on R2. Value changed from 400 (110010000) to 100 (1100100)
         let R3, R1 //This will be used to store the first flag
         let R4, R1 //This will be used to store the second flag
         ret 

Also see

List of OP Codes used in example.